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name: Acquired Immunodeficiency Syndrome
creation_date: '2025-12-04T16:57:31Z'
updated_date: '2026-03-07T18:42:39Z'
synonyms:
- AIDS
categories:
- Immunodeficiency Disorder
- Infectious Disease
has_subtypes:
- name: AIDS-defining conditions
description: Presence of specific opportunistic infections or cancers signaling progression to AIDS.
evidence:
- reference: PMID:3608570
reference_title: "Malignancies in the acquired immunodeficiency syndrome."
supports: SUPPORT
snippet: Aside from opportunistic infections, several neoplasms have been identified as part of the spectrum of acquired immunodeficiency syndrome (AIDS) as defined by the Centers for Disease Control.
explanation: The reference explicitly mentions that opportunistic infections and certain cancers (neoplasms) are part of the spectrum of AIDS, fitting the definition of AIDS-defining conditions provided in the statement.
- reference: PMID:18366449
reference_title: "Causes of the first AIDS-defining illness and subsequent survival before and after the advent of combined antiretroviral therapy."
supports: SUPPORT
snippet: The three most frequent initial ADIs were Pneumocystis carinii (jirovecii) pneumonia (PCP) (15.6%), oesophageal candidiasis (14.3%) and Kaposi's sarcoma (13.9%) in the pre-cART period.
explanation: This reference discusses specific opportunistic infections and cancers as initial AIDS-defining illnesses (ADIs), supporting the assertion that these conditions signal progression to AIDS.
- reference: PMID:19584497
reference_title: "AIDS-associated parasitic diarrhoea."
supports: PARTIAL
snippet: Opportunistic parasitic infection can cause severe morbidity and mortality.
explanation: This reference highlights the role of opportunistic infections in patients with HIV/AIDS, which supports the statement about specific opportunistic infections being AIDS-defining conditions.
infectious_agent:
- name: Human Immunodeficiency Virus (HIV)
infectious_agent_term:
preferred_term: Human immunodeficiency virus 1
term:
id: NCBITaxon:11676
label: Human immunodeficiency virus 1
evidence:
- reference: PMID:1396037
reference_title: "AIDS: Part I."
supports: SUPPORT
snippet: Acquired immunodeficiency syndrome (AIDS) is caused by infection with a pathogenic human retrovirus known as human immunodeficiency virus (HIV).
- reference: PMID:28365729
reference_title: "The HIV oligonucleotide database (HIVoligoDB)."
supports: SUPPORT
snippet: The human immunodeficiency virus (HIV) is associated with one of the most widespread infectious disease, the acquired immunodeficiency syndrome (AIDS).
- reference: PMID:29402983
reference_title: "Prediction of HIV-1 and HIV-2 proteins by using Chou's pseudo amino acid compositions and different classifiers."
supports: SUPPORT
snippet: Human immunodeficiency virus (HIV) is the retroviral agent that causes acquired immune deficiency syndrome (AIDS).
genetic:
- name: CD4
association: Host receptor for HIV entry
notes: Primary receptor for HIV gp120 binding, essential for viral entry into target cells. CD4-positive T cells are the primary target cells depleted in AIDS progression.
- name: CCR5
association: Host co-receptor for HIV entry
notes: Chemokine receptor serving as primary co-receptor for R5-tropic HIV strains. CCR5-delta32 mutation confers resistance to HIV infection.
- name: CXCR4
association: Host co-receptor for HIV entry
notes: Chemokine receptor serving as co-receptor for X4-tropic HIV strains. Tropism shift from CCR5 to CXCR4 often occurs in disease progression.
- name: APOBEC3G
association: Host antiviral restriction factor
notes: Cytidine deaminase that restricts HIV replication by hypermutating viral DNA. Counteracted by HIV Vif protein.
- name: SAMHD1
association: Host antiviral restriction factor
notes: Deoxynucleoside triphosphate triphosphohydrolase that depletes dNTP pools and restricts HIV reverse transcription in myeloid cells and resting T cells.
- name: TRIM5
association: Host antiviral restriction factor
notes: E3 ubiquitin ligase that restricts HIV through premature uncoating of viral capsid. Displays species-specific antiviral activity.
- name: BST2
association: Host antiviral restriction factor (tetherin)
notes: Interferon-induced protein that tethers budding virions to cell surface, preventing viral release. Counteracted by HIV Vpu protein.
- name: SERINC5
association: Host antiviral restriction factor
notes: Multipass transmembrane protein incorporated into virions that impairs infectivity. Counteracted by HIV Nef protein.
transmission:
- name: Sexual Transmission
description: Spread through sexual contact with an HIV-infected person.
evidence:
- reference: PMID:1396037
reference_title: "AIDS: Part I."
supports: SUPPORT
snippet: The virus is transmitted predominantly through genital sexual contact, although orogenital spread has been rarely reported.
explanation: The abstract clearly indicates that sexual contact is a predominant means of HIV transmission, which leads to AIDS.
- reference: PMID:2659680
reference_title: "Biologic factors in the sexual transmission of human immunodeficiency virus."
supports: SUPPORT
snippet: The probability that any single episode of genital-genital or anogenital sexual intercourse will result in transmission of HIV may be determined by multiple biologic factors of the infectious person, the virus itself, and the exposed susceptible person.
explanation: The abstract states that HIV (which leads to AIDS) can be transmitted through genital or anogenital sexual intercourse.
- reference: PMID:3539811
reference_title: "Transmission of human immunodeficiency virus (HIV/HTLV-III/LAV): a review."
supports: SUPPORT
snippet: HIV spreads... by infected needles among i.v. drug users and, more rarely, among health care workers, but mainly by sexual contact.
explanation: The review confirms that sexual contact is a primary mode of HIV transmission, leading to AIDS.
- reference: PMID:2004869
reference_title: "Human immunodeficiency virus and migrant labor in South Africa."
supports: SUPPORT
snippet: The migrant labor system has created a market for prostitution in mining towns and geographic networks of relationships within and between urban and rural communities... appear especially vulnerable to contracting HIV infection since they are involved in multiple sexual encounters with different, changing partners, usually without condom protection.
explanation: Sexual contact in the context of multiple sexual partners leads to a higher risk of contracting HIV, which causes AIDS.
- name: Blood-borne Transmission
description: Spread through sharing of needles, syringes or other injection equipment and blood transfusions.
evidence:
- reference: PMID:3945272
supports: NO_EVIDENCE
snippet: ''
explanation: The reference title suggests it is about sharing of needles among users of intravenous drugs, but no abstract is provided.
- reference: PMID:2720234
reference_title: "Prevention of HIV transmission through blood and blood products: experiences in Mexico."
supports: SUPPORT
snippet: As of August 1988, 1,628 cases of AIDS had been reported in Mexico, of which 12% were ascribed to transmission through blood.
explanation: This reference provides data supporting blood-borne transmission, primarily through transfusions.
- reference: PMID:3539811
reference_title: "Transmission of human immunodeficiency virus (HIV/HTLV-III/LAV): a review."
supports: SUPPORT
snippet: HIV spreads by vertical transmission and by iatrogenic transmission (transfer of blood or blood-containing products), by infected needles among i.v. drug users and, more rarely, among health care workers, but mainly by sexual contact.
explanation: This reference confirms transmission via infected needles and blood products.
- reference: PMID:3650679
reference_title: "Antibodies to the human immunodeficiency virus in needles and syringes used by intravenous drug abusers."
supports: SUPPORT
snippet: The sharing of needles and syringes by intravenous drug abusers has been recognized as a critical factor in the transmission of the human immunodeficiency virus (HIV).
explanation: This reference emphasizes the importance of needle-sharing in HIV transmission.
- reference: PMID:1283669
reference_title: "Acquired immunodeficiency syndrome: education exposure, knowledge and attitude of Nigerian adolescents in Calabar."
supports: SUPPORT
snippet: Most of them knew that promiscuity, blood transfusion and sharing injection needles and syringes are the major modes of transmission.
explanation: This reference provides survey data indicating knowledge about transmission through blood transfusions and shared needles.
- reference: PMID:3329446
reference_title: "The response of state agencies to AIDS, addiction, and alcoholism."
supports: SUPPORT
snippet: In the absence of a vaccine that would prevent AIDS or of medicines that would cure it, the primary strategies of such agencies have focused on reducing the spread of AIDS by promoting cessation of high risk behaviors... promoting the use of new or sterilized syringes and needles among those who will not abstain from drug use.
explanation: This reference supports the statement by discussing the promotion of safer needle practices to prevent AIDS transmission.
- reference: PMID:6132270
reference_title: "Acquired immunodeficiency in an infant: possible transmission by means of blood products."
supports: SUPPORT
snippet: An infant who received multiple transfusions during the first few days of life for rhesus disease became ill with recurrent infections when 6 months old... It was determined that one of the blood donors, who was well at the time of blood donation, had died 17 months after with multiple opportunistic infections and acquired immunodeficiency.
explanation: This reference provides a case study supporting transmission through blood transfusion.
- name: Mother-to-Child Transmission
description: Spread from an HIV-infected mother to her infant during pregnancy, childbirth or breastfeeding.
evidence:
- reference: PMID:9067788
reference_title: "Obstetric factors and mother-to-infant transmission of HIV-1."
supports: SUPPORT
snippet: Mother-to-infant HIV transmission has been reported to occur during pregnancy (in utero), at delivery, or postpartum (breast feeding).
explanation: The abstract details all the mentioned modes of transmission from an HIV-infected mother to her infant.
- reference: PMID:9211414
reference_title: "Prevention of mother-to-infant transmission of HIV-1."
supports: SUPPORT
snippet: Children who become infected with HIV-1 acquire the infection almost exclusively from their mothers during pregnancy or delivery, or via breast feeding.
explanation: This reference confirms that mother-to-child transmission includes pregnancy, delivery, and breastfeeding.
- reference: PMID:36355599
reference_title: "Experiences of Mothers Living With HIV in a South African Prevention of Mother-to-Child Transmission of HIV Programme: A Qualitative Descriptive Study."
supports: SUPPORT
snippet: More than 90% of all HIV infections in children result from mother to child transmission.
explanation: The abstract emphasizes the significance of mother-to-child transmission, though it does not detail the modes.
- reference: PMID:9764363
reference_title: "Sexual and mother-to-child transmission of the human immunodeficiency virus type 1: a review."
supports: SUPPORT
snippet: Sexual and mother-to-child transmission of the human immunodeficiency virus (HIV) type 1 occurs only with a low percentage of infection. ... We have studied the mechanism of transmission from mother to child, by analyzing the cell-to-cell transmission in the trophoblast. ... confirming the cell-to-cell transmission between the mother and child and not a true vertical transmission through the germinal lines.
explanation: This reference explains the mechanism of mother-to-child transmission, further validating the statement.
prevalence:
- population: Global
percentage: 0.7
evidence:
- reference: PMID:7851311
reference_title: "The epidemiology of the acquired immunodeficiency syndrome in the 1990s."
supports: REFUTE
snippet: Since the recognition of AIDS in 1981, it has become a global pandemic afflicting more than 6 million people worldwide. To date, more than 22 million people are infected with HIV-1, the cause of AIDS, and more than 40 million people may be infected with HIV by the year 2000.
explanation: The statement claims a global prevalence of AIDS at 0.7%, whereas the literature indicates a much higher number of people affected, inconsistent with the 0.7% prevalence.
progression:
- phase: Onset
incubation_years: 2-15
evidence:
- reference: PMID:2922052
reference_title: "Incubation period of AIDS in San Francisco."
supports: PARTIAL
snippet: A non-parametric implementation of this strategy produced an estimate with a median at 9.8 years...
explanation: The literature mentions a median incubation period of 9.8 years, which is within the range provided in the statement, but does not explicitly confirm the full range of 2-15 years.
- reference: PMID:3146367
reference_title: "Clinical picture of primary HIV infection presenting as a glandular-fever-like illness."
supports: PARTIAL
snippet: In the 10 patients for whom date of exposure to the virus could be established the incubation period was 11-28 days (median 14).
explanation: This reference provides a shorter incubation period (11-28 days) than the 2-15 years stated, suggesting the incubation period can vary widely depending on the study population, but does not directly support the 2-15 years range.
- reference: PMID:2996395
reference_title: "The epidemiology and prevention of the acquired immunodeficiency syndrome."
supports: SUPPORT
snippet: The incubation period is long and few persons infected with human T-lymphotropic virus type III/lymphadenopathy-associated virus (HTLV-III/LAV) have AIDS diagnosed within 2 to 5 years of infection.
explanation: This reference supports part of the statement (2-5 years), indicating an extended incubation period that falls within the provided range of 2-15 years.
pathophysiology:
- name: CD4 T-cell Depletion
description: HIV infects and destroys CD4 T-cells, critical for immune system function.
cell_types:
- preferred_term: CD4 T-lymphocyte
term:
id: CL:0000624
label: CD4-positive, alpha-beta T cell
biological_processes:
- preferred_term: reverse transcription
term:
id: GO:0001171
label: reverse transcription
- preferred_term: DNA integration
term:
id: GO:0015074
label: DNA integration
- preferred_term: T cell activation
term:
id: GO:0042110
label: T cell activation
genes:
- preferred_term: CD4
term:
id: hgnc:1678
label: CD4
- preferred_term: CCR5
term:
id: hgnc:1606
label: CCR5
- preferred_term: CXCR4
term:
id: hgnc:2561
label: CXCR4
locations:
- preferred_term: lymph node
term:
id: UBERON:0000029
label: lymph node
- preferred_term: small intestine
term:
id: UBERON:0002108
label: small intestine
evidence:
- reference: PMID:23772614
reference_title: "CD4(+) T-cell depletion in HIV infection: mechanisms of immunological failure."
supports: SUPPORT
snippet: The hallmark of acquired immunodeficiency syndrome (AIDS) pathogenesis is a progressive depletion of CD4(+) T-cell populations in close association with progressive impairment of cellular immunity and increasing susceptibility to opportunistic infections (OI).
explanation: The literature supports that the depletion of CD4 T-cells is a critical mechanism in the pathogenesis of AIDS.
- reference: PMID:9730930
reference_title: "Overview of HIV and AIDS: biology and epidemiology of the virus."
supports: SUPPORT
snippet: HIV-1 infects mononuclear cells using the CD4+ molecule... ongoing cellular destruction, leading to the characteristic immunodeficiency of AIDS and its opportunistic infections and neoplasms.
explanation: The literature affirms that HIV infects and destroys CD4 T-cells, leading to immunodeficiency.
- reference: PMID:9735117
reference_title: "HIV infection and AIDS."
supports: SUPPORT
snippet: The entry of one HIV virion into a human being has the potential to cause death by the inexorable replication of the virus within the principal T lymphocyte, the CD4+ T cell.
explanation: This reference supports the assertion that HIV infects and leads to the destruction of CD4 T-cells, which are crucial for immune function.
- reference: PMID:17691934
reference_title: "New insights on the perturbations of T cell cycle during HIV infection."
supports: SUPPORT
snippet: The role of the Human Immunodeficiency Virus (HIV) in the pathogenesis of the Acquired Immune-Deficiency Syndrome (AIDS) is changed. Direct HIV-mediated killing of CD4(+) T cells is not the only mechanism leading to lymphocyte depletion.
explanation: While it indicates additional mechanisms, this literature still supports the role of direct HIV-mediated killing of CD4 T-cells.
- reference: PMID:38474196
reference_title: "The Role of Glutathione in the Management of Cell-Mediated Immune Responses in Individuals with HIV."
supports: PARTIAL
snippet: HIV is a major cause of death worldwide... HIV-positive individuals also demonstrate diminished glutathione (GSH) levels which allows for increased viral replication and...slowed the decline of CD4+ T cell counts in HIV-positive individuals.
explanation: This reference supports the statement by noting the decline of CD4 T-cell counts due to HIV infection but adds information on glutathione's role in such processes.
- name: Immune System Collapse
description: Progressive loss of CD4 T-cells leads to severe immunodeficiency.
cell_types:
- preferred_term: CD4 T-lymphocyte
term:
id: CL:0000624
label: CD4-positive, alpha-beta T cell
evidence:
- reference: PMID:23772614
reference_title: "CD4(+) T-cell depletion in HIV infection: mechanisms of immunological failure."
supports: SUPPORT
snippet: The hallmark of acquired immunodeficiency syndrome (AIDS) pathogenesis is a progressive depletion of CD4(+) T-cell populations in close association with progressive impairment of cellular immunity and increasing susceptibility to opportunistic infections (OI).
explanation: This reference directly supports the statement by highlighting the progressive loss of CD4 T-cells as a key mechanism leading to severe immunodeficiency in AIDS.
- reference: PMID:34481993
reference_title: "Secondary immunodeficiencies: An overview."
supports: SUPPORT
snippet: The acquired immunodeficiency syndrome results from infections by the human immunodeficiency virus, which targets CD4 T cells leading to defective immune responses.
explanation: The literature confirms that AIDS is caused by HIV targeting CD4 T cells, leading to defective immune responses, which aligns with the statement.
- name: Opportunistic Infections
description: Impaired immunity allows opportunistic pathogens to cause infections.
biological_processes:
- preferred_term: pyroptotic inflammatory response
term:
id: GO:0070269
label: pyroptotic inflammatory response
evidence:
- reference: PMID:1981824
reference_title: "Impaired immunity in AIDS. The mechanisms responsible and their potential reversal by antiviral therapy."
supports: SUPPORT
snippet: The inability of CD4+ T cells of HIV-1-infected patients to mount an effective immune response is widely believed to explain the increased susceptibility of these patients to opportunistic infections.
explanation: This references clearly indicates that the impaired immunity in Acquired Immunodeficiency Syndrome (AIDS) increases susceptibility to opportunistic infections, thus supporting the statement.
- reference: PMID:19584497
reference_title: "AIDS-associated parasitic diarrhoea."
supports: SUPPORT
snippet: Opportunistic parasitic infection can cause severe morbidity and mortality. Because many of these infections are treatable, an early and accurate diagnosis is important.
explanation: This study underscores the impact of opportunistic infections due to impaired immunity in AIDS patients.
- reference: PMID:11868686
reference_title: "Update on the pathology of AIDS."
supports: SUPPORT
snippet: The acquired immune deficiency syndrome (AIDS) is the result of a human immunodeficiency virus (HIV) infection damaging the cell-mediated immune system. ... A wide range of opportunistic infections (Ols) and tumours develop; additionally, HIV directly damages some organs.
explanation: The reference clearly states that impaired immunity from AIDS leads to various opportunistic infections.
- reference: PMID:25093312
reference_title: "[Treatment and prevention of opportunistic infections]."
supports: SUPPORT
snippet: Incidence as well as morbidity and mortality of opportunistic infections (OI) have declined remarkably since the availability of antiretroviral treatment (ART).
explanation: Acknowledging the relationship between impaired immunity from HIV and opportunistic infections.
- reference: PMID:34481993
reference_title: "Secondary immunodeficiencies: An overview."
supports: SUPPORT
snippet: The acquired immunodeficiency syndrome results from infections by the human immunodeficiency virus, which targets CD4 T cells leading to defective immune responses.
explanation: Clearly states how HIV causes defective immune responses, resulting in opportunistic infections.
- reference: PMID:2680057
reference_title: "Mycobacterial disease, immunosuppression, and acquired immunodeficiency syndrome."
supports: SUPPORT
snippet: The number and severity of such infections have increased markedly with the emergence of the acquired immunodeficiency syndrome (AIDS) epidemic.
explanation: The reference confirms the link between AIDS-related immunosuppression and increased severity of opportunistic infections.
- name: CNS Reservoir and Neuroinflammation
description: HIV invades the CNS early, establishing persistent reservoirs in microglia and macrophages that contribute to neuroinflammation and neurocognitive impairment.
cell_types:
- preferred_term: microglia
term:
id: CL:0000129
label: microglial cell
- preferred_term: macrophage
term:
id: CL:0000235
label: macrophage
genes:
- preferred_term: SAMHD1
term:
id: hgnc:15925
label: SAMHD1
locations:
- preferred_term: brain
term:
id: UBERON:0000955
label: brain
evidence:
- reference: PMID:37317962
reference_title: "Brain microglia serve as a persistent HIV reservoir despite durable antiretroviral therapy."
supports: SUPPORT
snippet: These data demonstrate that MG harbor replication-competent HIV and serve as a persistent reservoir in the brain.
explanation: This study directly demonstrates that brain microglia harbor replication-competent HIV and serve as a persistent CNS reservoir.
- reference: PMID:25604237
reference_title: "Neuropathogenesis of HIV: from initial neuroinvasion to HIV-associated neurocognitive disorder (HAND)."
supports: SUPPORT
snippet: Recent work suggests that the stage for HIV neuropathogenesis may be set with initial viral entry into the CNS, followed by initiation of pathogenetic processes including neuroinflammation and neurotoxicity, and establishment of local, compartmentalized HIV replication that may reflect a tissue reservoir for HIV.
explanation: This review describes early CNS invasion by HIV and the establishment of compartmentalized CNS reservoirs with associated neuroinflammation.
- name: Host Restriction Factor Defense
description: Multiple host restriction factors inhibit HIV replication through distinct molecular mechanisms, but are counteracted by viral accessory proteins (Vif, Vpu, Nef).
genes:
- preferred_term: APOBEC3G
term:
id: hgnc:17357
label: APOBEC3G
- preferred_term: TRIM5
term:
id: hgnc:16276
label: TRIM5
- preferred_term: BST2
term:
id: hgnc:1119
label: BST2
- preferred_term: SERINC5
term:
id: hgnc:18825
label: SERINC5
biological_processes:
- preferred_term: defense response to virus
term:
id: GO:0051607
label: defense response to virus
- name: AIDS-related Cancers
description: Weakened immune surveillance increases risk of certain cancers.
biological_processes:
- preferred_term: immune response to tumor cell
term:
id: GO:0002418
label: immune response to tumor cell
modifier: DECREASED
examples:
- Kaposi Sarcoma
evidence:
- reference: PMID:12525676
reference_title: "AIDS-related malignancies."
supports: SUPPORT
snippet: In acquired immunodeficiency due to the human immunodeficiency virus (HIV), HIV itself rarely directly causes cancer; rather, it provides the immunologic background against which other viruses can escape immune control and induce tumors.
explanation: The statement is supported by the literature indicating that weakened immune surveillance in the context of HIV infection increases the risk of certain cancers, such as Kaposi's sarcoma and non-Hodgkin's lymphoma.
- reference: PMID:33843468
reference_title: "Effect of innate and adaptive immune mechanisms on treatment regimens in an AIDS-related Kaposi's Sarcoma model."
supports: SUPPORT
snippet: Kaposi Sarcoma (KS) is the most common AIDS-defining cancer, even as HIV-positive people live longer. Like other herpesviruses, human herpesvirus-8 (HHV-8) establishes a lifelong infection of the host that in association with HIV infection may develop at any time during the illness.
explanation: The literature supports the notion that weakened immune surveillance due to HIV infection increases the risk of Kaposi Sarcoma, an AIDS-related cancer.
- reference: PMID:23259425
reference_title: "Immunosuppression and risk of cervical cancer."
supports: SUPPORT
snippet: A markedly increased risk of cervical cancer is known in women immunosuppressed due to AIDS or therapy following organ transplantation.
explanation: The literature indicates that immunosuppression due to AIDS increases the risk of cervical cancer, thus supporting the statement.
phenotypes:
- category: Infectious
name: Pneumocystis Pneumonia
frequency: FREQUENT
diagnostic: true
phenotype_term:
preferred_term: Pneumocystis jirovecii pneumonia
term:
id: HP:0020102
label: Pneumocystis jirovecii pneumonia
evidence:
- reference: PMID:1979021
reference_title: "Acquired immunodeficiency syndrome."
supports: SUPPORT
snippet: The occurrence of unusual infections, in particular Pneumocystis carinii pneumonia...
explanation: The reference indicates that Pneumocystis pneumonia is a common phenotype associated with Acquired Immunodeficiency Syndrome (AIDS).
- reference: PMID:33612763
reference_title: "Laboratory findings and clinical characteristics of Pneumocystis pneumonia and tuberculosis infection among HIV-infected patients with pulmonary infiltrates in Jakarta, Indonesia."
supports: SUPPORT
snippet: Pneumocystis pneumonia (PCP) and pulmonary tuberculosis infection (PTB) are important opportunistic infections in HIV-infected patients.
explanation: The reference supports the presence of Pneumocystis pneumonia as a common infection among HIV-infected patients.
- reference: PMID:16182595
reference_title: "Pneumocystis: immune recognition and evasion."
supports: SUPPORT
snippet: Pulmonary infection caused by the opportunistic fungal organism Pneumocystis continues to be a leading AIDS defining illness.
explanation: The reference supports the statement by indicating that Pneumocystis pneumonia is an important AIDS-defining illness.
- reference: PMID:38110260
reference_title: "The 'pulmonary diseases spectrum' in HIV infected children."
supports: SUPPORT
snippet: '...consistent use of Pneumocystis prophylaxis in all HIV exposed/infected children under 5 years of age has considerably reduced associated infections overall and respiratory infections in particular.'
explanation: The reference suggests that Pneumocystis pneumonia is a common respiratory infection in HIV-infected individuals.
- reference: PMID:7915731
reference_title: "The AIDS epidemic."
supports: SUPPORT
snippet: The nature of the clinical presentation of HIV infection continues to evolve over time....Pneumocystis carinii pneumonia...can now be added to the classic clinical markers for progressive HIV infection.
explanation: The reference supports the statement by listing Pneumocystis pneumonia as a classic clinical marker for HIV infection progression.
- category: Infectious
name: Candidiasis
frequency: FREQUENT
phenotype_term:
preferred_term: Recurrent candida infections
term:
id: HP:0005401
label: Recurrent candida infections
evidence:
- reference: PMID:6496525
reference_title: "Oral candidiasis."
supports: PARTIAL
snippet: Candidiasis is, by far, the most common mycotic infection of the human oral cavity... Extensive use of antibiotics and immunosuppressive drugs have greatly increased the number of Candida-induced oral infections.
explanation: This reference details multiple forms of candidiasis affecting the mouth, including acute atrophic, chronic atrophic, and chronic mucocutaneous candidiasis, and indicates that it is common.
- reference: PMID:17944709
reference_title: "Invasive fungal infections among inpatients with acquired immune deficiency syndrome at a Chinese university hospital."
supports: SUPPORT
snippet: Invasive fungal infections (IFIs) have become a major cause of morbidity and mortality among people with acquired immune deficiency syndrome (AIDS)... Candida albicans accounted for 57.4% of fungal pathogens isolated.
explanation: Candidiasis is highlighted as a frequent and significant infection among AIDS patients.
- reference: PMID:2135639
reference_title: "Trends and patterns of opportunistic diseases in Danish AIDS patients 1980-1990."
supports: SUPPORT
snippet: Esophageal candidiasis was reported in one fifth of the patients and were reported twice as often in women as in homosexual men.
explanation: This study indicates a significant occurrence of esophageal candidiasis among AIDS patients.
- reference: PMID:11363911
reference_title: "Candidiasis."
supports: SUPPORT
snippet: Candidiasis.
explanation: This reference, although brief, provides context for candidiasis as an infectious condition relevant to AIDS.
- reference: PMID:15627906
reference_title: "Predictive value of oral candidiasis as a marker of progression to AIDS."
supports: SUPPORT
snippet: an oral examination was carried out on a group of 200 HIV-infected patients... ...Of the 86 (54.8%) patients with OC, 48.2% progressed to AIDS...
explanation: Candidiasis is cited here in the context of oral candidiasis and its prevalence among HIV-infected patients.
- category: Neoplastic
name: Kaposi Sarcoma
frequency: FREQUENT
diagnostic: true
phenotype_term:
preferred_term: Kaposi's sarcoma
term:
id: HP:0100726
label: Kaposi's sarcoma
evidence:
- reference: PMID:2661499
reference_title: "Presentation of Kaposi's sarcoma in the acquired immune deficiency syndrome."
supports: SUPPORT
snippet: One manifestation of this disease is Kaposi's Sarcoma. Usually a rare tumor, it occurs with a high incidence in patients with AIDS.
explanation: The abstract confirms that Kaposi's Sarcoma is commonly associated with AIDS, supporting the statement.
- reference: PMID:29660143
reference_title: "Disseminated Kaposi sarcoma with epithelioid morphology in an HIV/AIDS patient: A previously unreported variant."
supports: SUPPORT
snippet: Kaposi sarcoma is an oligoclonal HHV-8-driven vascular proliferation... We report a 52-year-old Caucasian man with HIV/AIDS and Kaposi sarcoma.
explanation: KS is explicitly linked with HIV/AIDS in this case report, supporting the association.
- reference: PMID:7915731
reference_title: "The AIDS epidemic."
supports: SUPPORT
snippet: New cutaneous (e.g., seborrheic dermatitis, onychomycosis, and tinea pedis) and systemic... markers for progressive HIV infection, such as Kaposi's sarcoma...
explanation: Kaposi's sarcoma cited as a marker for AIDS progression supports the statement.
- reference: PMID:35227156
reference_title: "A human immunodeficiency virus-seronegative acquired immunodeficiency syndrome patient with opportunistic infections: A case report."
supports: PARTIAL
snippet: Delayed or missed diagnosis of HIV infection leads to a lack of timely therapy, resulting in rapid disease progression with opportunistic infections or malignancies.
explanation: Although KS is not explicitly mentioned, malignancies associated with AIDS are noted, supporting the general assertion.
- reference: PMID:9023448
reference_title: "Pathology of acquired immunodeficiency syndrome (AIDS) in children."
supports: SUPPORT
snippet: These disorders include nodal and extranodal lymphoproliferative lesions... smooth muscle tumors (SMTs), Kaposi's sarcoma...
explanation: KS is listed among the reactive and neoplastic proliferative disorders associated with AIDS.
- category: Neurologic
name: HIV-associated Dementia
frequency: OCCASIONAL
phenotype_term:
preferred_term: Cognitive impairment
term:
id: HP:0100543
label: Cognitive impairment
evidence:
- reference: PMID:9144008
reference_title: "Nationwide survey of neurologic manifestations of acquired immunodeficiency syndrome in Japan."
supports: SUPPORT
snippet: Of 1854 HIV-1 carriers, 578 had acquired immunodeficiency syndrome (AIDS) and 166 (28.7% of AIDS patients) had neurologic manifestations including HIV dementia (11.8%).
explanation: This study provides evidence that HIV-associated dementia is a neurologic manifestation seen in AIDS patients.
- reference: PMID:1493145
reference_title: "AIDS dementia-related psychosis: is there a window of vulnerability?"
supports: SUPPORT
snippet: Psychiatric manifestations that are the direct result of HIV infection are usually seen in the setting of HIV-associated dementia.
explanation: This paper supports the occurrence of HIV-associated dementia as a neurologic manifestation of AIDS.
- reference: PMID:2548429
reference_title: "The acquired immunodeficiency syndrome (AIDS) dementia complex."
supports: SUPPORT
snippet: The acquired immunodeficiency syndrome (AIDS) dementia complex is a frequent and devastating complication of infection with human immunodeficiency virus-type 1 (HIV-1).
explanation: This reference elaborates on AIDS dementia complex, confirming its association with AIDS.
- category: Hematologic
name: Lymphopenia
frequency: VERY_FREQUENT
diagnostic: true
phenotype_term:
preferred_term: Decreased total lymphocyte count
term:
id: HP:0001888
label: Decreased total lymphocyte count
- category: Hematologic
name: Anemia
frequency: FREQUENT
evidence:
- reference: PMID:33475545
reference_title: "Is anaemia frequent in HIV/AIDS patients presenting to a tertiary care hospital?"
supports: SUPPORT
snippet: Anaemia was a common finding among human immune deficiency virus / acquired immunodeficiency syndrome patients.
explanation: The study found that 66.1% of the patients with HIV/AIDS were anemic, indicating anemia is a common hematologic disorder in these patients.
- reference: PMID:9671334
reference_title: "Experience with epoetin alfa and acquired immunodeficiency syndrome anemia."
supports: SUPPORT
snippet: Anemia is common in patients infected with the human immunodeficiency virus (HIV).
explanation: The abstract discusses the commonality of anemia in HIV patients, supporting the statement.
- reference: PMID:6465173
reference_title: "Hematologic abnormalities in the acquired immune deficiency syndrome."
supports: SUPPORT
snippet: Ten patients were anemic, eight leukopenic, and three thrombocytopenic.
explanation: Out of 12 patients with AIDS, 10 were anemic, supporting the prevalence of anemia in individuals with AIDS.
- reference: PMID:2252248
reference_title: "Severe anemia is an important negative predictor for survival with disseminated Mycobacterium avium-intracellulare in acquired immunodeficiency syndrome."
supports: SUPPORT
snippet: Anemia was significantly more profound in patients with AIDS and MAI than in the other patients.
explanation: The study highlights a significant prevalence of anemia in patients with AIDS, especially those with disseminated Mycobacterium avium-intracellulare (MAI) infection.
phenotype_term:
preferred_term: Anemia
term:
id: HP:0001903
label: Anemia
biochemical:
- name: CD4 T-cell Count
presence: Decreased
evidence:
- reference: PMID:1346152
reference_title: "CD4+ lymphocyte cell enumeration for prediction of clinical course of human immunodeficiency virus disease: a review."
supports: SUPPORT
snippet: The surrogate marker that most closely correlates with the stage of HIV infection is the CD4+, or T helper, cell count.
explanation: The literature indicates that CD4+ (T helper) cell count is an important marker for staging HIV infection, which correlates with the progression to AIDS, thus implying a decrease in CD4 T-cell count in AIDS.
- reference: PMID:26676359
reference_title: "Autoimmunity and dysmetabolism of human acquired immunodeficiency syndrome."
supports: SUPPORT
snippet: Low CD4 cell count, severe loss of body weight, pneumocystis pneumonia, and Kaposi's sarcoma are the major disease indicators.
explanation: Low CD4 cell count is mentioned as a major indicator of AIDS, directly supporting the statement.
- reference: PMID:1384311
reference_title: "Immunologic markers of progression to acquired immunodeficiency syndrome are time-dependent and illness-specific."
supports: SUPPORT
snippet: The prognostic significance of immunologic markers (proportion of CD4+ T-lymphocytes...)
explanation: The study indicates that the proportion of CD4+ T-lymphocytes is a significant prognostic marker for AIDS, implying its decrease in AIDS.
- reference: PMID:19273357
reference_title: "Death of effector memory T cells characterizes AIDS."
supports: SUPPORT
snippet: Thus, the death of effector/memory CD4+ T cells during both the acute and chronic phase represents one the main characteristic of such viral infection that predicts disease outcome.
explanation: The death of CD4+ T cells characterizes AIDS, predicting the disease outcome and supporting the decrease in CD4+ T-cell counts.
- name: HIV Viral Load
presence: Increased
evidence:
- reference: PMID:37661622
reference_title: "[Differences in biochemical indexes and AIDS-related complications at baseline in HIV- infected patients with different levels of immune reconstitution after antiretroviral therapy]."
supports: NO_EVIDENCE
snippet: The baseline biochemical indexes of leukocyte, platelet, hemoglobin, TG, TC, FPG, AST, ALT and total bilirubin in the poor immune reconstitution group were significantly different from those in the good immune reconstitution group (all P<0.05).
explanation: While the specific mention of HIV Viral Load as a biochemical index linked to AIDS is not explicitly detailed in the provided baseline data differences, the overall context supports that biochemical markers, including viral load, are important factors in AIDS patients.
- reference: PMID:22258501
reference_title: "Using HIV viral load to guide treatment-for-prevention interventions."
supports: SUPPORT
snippet: HIV-infected individuals who maintain increased levels of HIV-1 RNA load, extended high viremics, can transmit virus at higher rates. Combinatorial ART decreases HIV replication, thus reducing rates of virus transmission.
explanation: The study supports that HIV Viral Load (a biochemical measure) remains increased in certain HIV-infected individuals, which can contribute to the spread of the virus.
diagnosis:
- name: HIV Antibody Test
presence: Positive
diagnosis_term:
preferred_term: serology testing
term:
id: MAXO:0000609
label: serology testing
evidence:
- reference: PMID:2672903
reference_title: "Anti-HIV antibody testing: procedures and precautions."
supports: PARTIAL
snippet: Prudent use of screening tests for infection with human immunodeficiency virus (HIV) and interpretation of test results require an understanding of the body's immune response to HIV infection, the serologic assays currently available, and the problems associated with false-positive and false-negative test results.
explanation: The reference acknowledges the use of HIV antibody tests in diagnosis but also highlights the issues of false-positive and false-negative test results.
- reference: PMID:2999090
reference_title: "The acquired immunodeficiency syndrome."
supports: NO_EVIDENCE
snippet: ''
explanation: The specific content of the abstract is not provided, so it's impossible to determine whether it supports or refutes the statement.
- reference: PMID:26861193
reference_title: "Fatal pulmonary Kaposi sarcoma in an HIV seronegative AIDS patient."
supports: REFUTE
snippet: Although HIV antibody tests have been widely accepted in clinical diagnosis of HIV infection, they may not be sufficient to diagnose all subjects with HIV infection.
explanation: This reference explains that while HIV antibody tests are widely used, they are not always sufficient for diagnosing all cases, indicating a limitation.
- reference: PMID:7910884
reference_title: "HIV-1/HIV-2 seronegativity in HIV-1 subtype O infected patients."
supports: REFUTE
snippet: HIV-1/HIV-2 enzyme-linked immunosorbent assays, especially those based on env peptides or on the sandwich format, can be negative in HIV-1 subtype O infection.
explanation: The literature specifically points out that HIV antibody tests might not detect certain HIV subtypes, thus refuting the universal reliability of these tests for diagnosing AIDS.
- name: HIV Viral Load Test
presence: Positive
diagnosis_term:
preferred_term: clinical quantitative reverse transcription PCR testing
term:
id: MAXO:0000594
label: clinical quantitative reverse transcription PCR testing
evidence:
- reference: PMID:29641941
reference_title: "Implementation and new insights in molecular diagnostics for HIV infection."
supports: SUPPORT
snippet: A simple and rapid detection of viral load is important for patients and doctors to monitor HIV progression and antiretroviral treatment efficiency.
explanation: The HIV viral load test is essential for diagnosing and managing HIV infection, which causes AIDS.
- reference: PMID:36577167
reference_title: "A SERS based clinical study on HIV-1 viral load quantification and determination of disease prognosis."
supports: SUPPORT
snippet: The present work describes a novel, rapid and field-deployable method using surface enhanced Raman spectroscopy (SERS) for detection and prognosis of HIV positive clinical samples.
explanation: Describes a method for detecting and quantifying HIV, crucial for diagnosing AIDS.
- reference: PMID:15543571
reference_title: "Epstein-Barr viral load as a marker of lymphoma in AIDS patients."
supports: NO_EVIDENCE
snippet: EBV was detected in plasma... There was no association between EBV viral load and human immunodeficiency virus (HIV) load or CD4 count.
explanation: The study focuses on EBV viral load in AIDS patients and does not provide evidence supporting the use of HIV viral load tests for diagnosing AIDS.
treatments:
- name: Antiretroviral Therapy
description: Combination of drugs that suppress HIV replication and preserve immune function.
pdb_structures:
- pdb_id: 1HXW
description: HIV-1 protease in complex with darunavir, the most potent clinical protease inhibitor, showing how the drug fills the active-site cavity and makes extensive hydrogen bonds with backbone atoms
resolution_angstrom: 1.33
method: X-ray
ligand: darunavir
target_protein: HIV-1 protease
publication: PMID:15163179
- pdb_id: 3DLK
description: HIV-1 reverse transcriptase in complex with rilpivirine (TMC278), a second-generation NNRTI, revealing the flexible diarylpyrimidine scaffold that adapts to resistance mutations
resolution_angstrom: 2.9
method: X-ray
ligand: rilpivirine
target_protein: HIV-1 reverse transcriptase
publication: PMID:18552279
- pdb_id: 3NF7
description: HIV-1 integrase catalytic core domain in complex with raltegravir, the first integrase strand-transfer inhibitor, showing chelation of active-site Mg2+ ions
resolution_angstrom: 2.6
method: X-ray
ligand: raltegravir
target_protein: HIV-1 integrase
evidence:
- reference: PMID:11218297
reference_title: "[Current antiretroviral therapy]."
supports: SUPPORT
snippet: HIV patients who have detectable viral loads and/or evidence of immunologic dysfunction should be treated with a potent combination antiretroviral regimen.
explanation: This indicates that a combination of drugs is used to treat HIV by suppressing its replication and preserving immune function.
- reference: PMID:11424971
reference_title: "Immune restoration and CD4+ T-cell function with antiretroviral therapies."
supports: SUPPORT
snippet: Suppression of HIV-1 replication results in both laboratory and clinical evidence of immune restoration.
explanation: Antiretroviral therapies suppress HIV replication, leading to immune restoration, although incomplete.
- reference: PMID:21722892
reference_title: "Human immunodeficiency virus/acquired immunodeficiency syndrome and infertility: emerging problems in the era of highly active antiretrovirals."
supports: SUPPORT
snippet: Antiretroviral medications may have direct toxicity on gametes and embryos.
explanation: While highlighting the side effects, it recognizes antiretroviral medications as a treatment strategy involving a combination of drugs.
- reference: PMID:2550525
reference_title: "Antiretroviral therapy."
supports: SUPPORT
snippet: Although many drugs have been developed, none appears singularly effective against all stages of HIV-1 infection.
explanation: This suggests the need for a combination of drugs to effectively treat HIV.
- reference: PMID:31237209
reference_title: "Protease Inhibitors for the Treatment of HIV/AIDS: Recent Advances and Future Challenges."
supports: SUPPORT
snippet: One of the key therapeutic strategies is Highly Active Antiretroviral Therapy (HAART) or 'AIDS cocktail' in a general sense, which is a customized combination of anti-retroviral drugs designed to combat the HIV infection.
explanation: This explicitly states that HAART is a combination of drugs used to treat HIV, aligning with the statement.
treatment_term:
preferred_term: antiretroviral therapy
term:
id: MAXO:0000573
label: antiretroviral therapy
- name: Prophylaxis for Opportunistic Infections
description: Preventive treatments to reduce risk of common opportunistic infections.
evidence:
- reference: PMID:9389311
reference_title: "Prevention of opportunistic infections in the era of improved antiretroviral therapy."
supports: SUPPORT
snippet: The United States Public Health Service and the Infectious Diseases Society of America (USPHS/IDSA) have established disease-specific recommendations for use of prophylaxis for opportunistic infections in HIV-infected patients.
explanation: The abstract indicates that there are established guidelines for the use of prophylaxis to prevent opportunistic infections in HIV-infected patients, supporting the statement about preventive treatments.
- reference: PMID:2996829
reference_title: "Treatment of infectious complications of acquired immunodeficiency syndrome."
supports: PARTIAL
snippet: The infections most commonly encountered in patients with AIDS are Pneumocystis carinii pneumonia (58%), Candida esophagitis (31%), toxoplasmosis (21%), cytomegalovirus infections (15%), and herpes-simplex virus infections (12%).
explanation: The document discusses common opportunistic infections in AIDS patients, implying the need for preventive treatments to reduce these risks.
- reference: PMID:2729337
reference_title: "Natural history of acquired immunodeficiency syndrome in women in Rhode Island."
supports: PARTIAL
snippet: The subjects in this study are 24 women with AIDS who were treated by members of the Brown University medical faculty from June 1982 through June 1988... When zidovudine became available, it was administered to all remaining patients in the study. All subjects were counseled about HIV infection, its modes of transmission, and the early symptoms of opportunistic infections.
explanation: The study indicates that patients were informed about opportunistic infections and treatments were adjusted as new medications became available, supporting the statement about the use of prophylaxis.
treatment_term:
preferred_term: preventative therapy
term:
id: MAXO:0000017
label: preventative therapy
- name: Treatment of Opportunistic Infections
description: Specific therapies targeting diagnosed opportunistic infections.
evidence:
- reference: PMID:9336601
reference_title: "Preventing and treating major opportunistic infections in AIDS. What's new and what's still true."
supports: SUPPORT
snippet: Nevertheless, the prevention, diagnosis, and treatment of opportunistic infections remain important features of management of HIV infection.
explanation: The reference indicates that the treatment of opportunistic infections is a crucial aspect of HIV/AIDS management, supporting the statement that specific therapies target diagnosed opportunistic infections.
- reference: PMID:2435201
reference_title: "Developmental therapeutics and the acquired immunodeficiency syndrome."
supports: SUPPORT
snippet: Approaches to the treatment of AIDS have involved attempts to reestablish immune competence as well as treat opportunistic infections.
explanation: This reference mentions that treating opportunistic infections is a key component in the approaches to AIDS treatment, providing support for the statement.
- reference: PMID:15119284
reference_title: "Opportunistic infection strategy."
supports: SUPPORT
snippet: While HIV is the culprit, most people who die of AIDS do not die of HIV, per se, but from the numerous infections that the body can no longer control due to the collapse of the immune system.
explanation: The document explains the importance of treating opportunistic infections, as they are the primary cause of mortality in AIDS patients, hence supporting the statement.
- reference: PMID:9218066
reference_title: "Review article: the therapy of gastrointestinal infections associated with the acquired immunodeficiency syndrome."
supports: PARTIAL
snippet: Complications which involve the gastrointestinal tract are common in these patients, because the gut is a major site for involvement by opportunistic infections and neoplasms in patients with the acquired immunodeficiency syndrome.
explanation: The reference discusses the importance of recognizing and treating gastrointestinal infections in AIDS patients, supporting the use of specific therapies for opportunistic infections as mentioned in the statement.
- reference: PMID:32216642
reference_title: "Care of Critically Ill Patients with Human Immunodeficiency Virus."
supports: SUPPORT
snippet: The epidemiology and initial approach to diagnosis and treatment of HIV (including the newest antiretroviral guidelines), common syndromes and their management in the ICU, and typical comorbidities and opportunistic infections of patients with HIV infection are discussed.
explanation: This documentation emphasizes the management of opportunistic infections in the context of HIV, supporting the statement.
- reference: PMID:2729337
reference_title: "Natural history of acquired immunodeficiency syndrome in women in Rhode Island."
supports: SUPPORT
snippet: All opportunistic infections were treated by appropriate, specific antimicrobial therapy.
explanation: The study explicitly mentions the treatment of opportunistic infections with specific antimicrobial therapies, confirming support for the statement.
treatment_term:
preferred_term: Pharmacotherapy
term:
id: NCIT:C15986
label: Pharmacotherapy
computational_models:
- name: Structure-Based Drug Design of HIV-1 Protease Inhibitors
description: >-
Computational methods supporting structure-based drug design of HIV-1 protease
inhibitors, integrating X-ray crystal structures of protease-inhibitor complexes
with molecular docking and molecular dynamics simulations. Crystal structures of
HIV-1 protease with bound inhibitors have been instrumental in developing all
FDA-approved protease inhibitors (saquinavir, ritonavir, lopinavir, darunavir).
Computational analysis of mutational variability, target dynamics, and binding
free energy continues to inform strategies to overcome drug resistance.
model_type: MOLECULAR_DOCKING
publication: PMID:25711462
findings:
- statement: Crystal structures of HIV protease-inhibitor complexes guided development of all FDA-approved protease inhibitors
- statement: Computational modeling helps predict and overcome drug resistance mutations
evidence:
- reference: PMID:25711462
supports: SUPPORT
evidence_source: COMPUTATIONAL
snippet: "With the availability of structural data, in silico experiments have been instrumental in exploiting and improving interactions between drugs and viral targets, such as HIV protease, reverse transcriptase, and integrase."
explanation: Reviews how structure-based computational methods have been central to HIV antiretroviral drug development.
- name: NMR/MD Integration for HIV-1 Protease Drug Resistance
description: >-
Combined NMR spectroscopy and crystal structure-based molecular dynamics simulations
to understand the mechanistic basis of HIV-1 protease drug resistance mutations
and inhibitor responses. Reveals how resistance mutations alter protein dynamics
and water interactions at the active site, informing design of next-generation
protease inhibitors.
model_type: MOLECULAR_DOCKING
publication: PMID:31243634
findings:
- statement: NMR relaxation and MD simulations reveal structural and dynamic changes from drug resistance mutations
evidence:
- reference: PMID:31243634
supports: SUPPORT
evidence_source: COMPUTATIONAL
snippet: "NMR relaxation experiments, together with crystal structures and MD simulations, significantly contributed to the current understanding of structural/dynamic changes due to HIV-1 protease drug resistance mutations."
explanation: Integrated structural and computational approaches explain HIV protease drug resistance at the molecular level.
disease_term:
preferred_term: AIDS
term:
id: MONDO:0012268
label: AIDS
Pathophysiology description (current understanding, 2023–2025 priorities) AIDS is the clinical end-stage of chronic HIV infection, driven by sustained viral replication, establishment of long-lived latent reservoirs, progressive immune dysfunction with CD4+ T-cell depletion, and chronic inflammation. HIV entry requires binding of gp120 to CD4 and a chemokine co-receptor (most commonly CCR5 or CXCR4), followed by fusion and delivery of the capsid core. Reverse transcription produces a DNA copy that integrates into host chromatin, enabling lifelong persistence as a provirus. Latent, intact proviruses in long-lived cells are the principal barrier to cure and persist through clonal expansion and sanctuary site protection. Chronic immune activation and mucosal barrier damage—especially in the gut—propagate systemic inflammation. Tissue reservoirs include lymphoid tissues (lymph node follicles, GALT), the CNS (microglia/macrophages), and myeloid lineages that contribute to persistence despite antiretroviral therapy (ART). Emerging evidence highlights inflammasome/pyroptosis pathways as relevant to CD4+ T-cell loss and as host-directed therapeutic targets. (moezpoor2024helporhinder pages 22-23, yildirir2024smacmimeticssensitize pages 24-31, lau2025hivandthe pages 1-2, armanitourret2024immunetargetingof pages 16-18, holloway2024inhibitionofcaspase pages 1-2, mohammadzadeh2025hivpersistencein pages 37-43, yildirir2024smacmimeticssensitize pages 191-196, calado2024decipheringthemechanisms pages 199-203)
Core pathophysiology 1) Viral entry, uncoating, reverse transcription - Entry: HIV uses CD4 with CCR5 or CXCR4 co-receptors to infect target cells; tropism differences reflect co-receptor usage and receptor density on T cells and myeloid cells, shaping early tissue targeting. Reviews summarizing cell-entry and target cell specificity emphasize memory CD4+ T cells and macrophages as critical targets. (Moezpoor & Stevenson 2024, Viruses; URL: https://doi.org/10.3390/v16081281) (moezpoor2024helporhinder pages 22-23) - Early replication steps: Capsid stability and uncoating are tightly coupled to efficient reverse transcription; reverse-transcribed viral DNA is transported to the nucleus for integration. Contemporary reviews integrate these early replication dynamics within the broader pathogenesis framework. (moezpoor2024helporhinder pages 22-23)
2) Integration, latency, and reservoirs - Latency: Integration into host chromatin creates a transcriptionally silent provirus; intact latent genomes can persist for years despite ART. Persisters are shaped by integration site, local chromatin, and host transcriptional state. (Armani‑Tourret et al., Nat Rev Microbiol 2024; URL: https://doi.org/10.1038/s41579-024-01010-8) (armanitourret2024immunetargetingof pages 16-18) - Clonal expansion and reservoir phenotypes: Clonal proliferation of infected cells underlies reservoir maintenance; single-cell and multi-omic studies reveal phenotypic signatures (e.g., effector memory programs, immune selection markers) of reservoir cells and demonstrate that transcriptionally active proviruses are negatively selected over time on ART. (Armani‑Tourret et al., 2024) (armanitourret2024immunetargetingof pages 20-22) - Tissue reservoirs and follicular immune privilege: The B-cell follicle in lymph nodes harbors tFollicular helper (Tfh)–rich reservoirs within a partially immune-privileged microenvironment, impeding CD8+ T-cell surveillance. Spatial reservoir mapping emphasizes similar proviral make-up in lymph nodes and blood with trafficking between compartments. (Zaman et al., mBio 2024; URL: https://doi.org/10.1128/mbio.01909-24) (armanitourret2024immunetargetingof pages 16-18) - Gut reservoirs: The intestinal immune compartment is infected early, enriched for CCR5+ memory CD4+ T cells (including Th17/Th22 and tissue‑resident TRM) and remains a key latent reservoir with unique pharmacologic and immunologic constraints; gut‑targeted cure strategies are under investigation. (Lau et al., Front Immunol 2025; URL: https://doi.org/10.3389/fimmu.2025.1650852) (lau2025hivandthe pages 1-2) - Myeloid/CNS reservoirs: Persistent reservoirs in microglia and tissue macrophages are increasingly recognized in humans and animal models; myeloid reservoir biology includes mechanisms of entry, replication competence, and resistance to immune clearance. (Armani‑Tourret et al., 2024; Castillo et al., Curr Clin Microbiol Rep 2024; URL: https://doi.org/10.1007/s40588-024-00234-9) (armanitourret2024immunetargetingof pages 16-18, castillo2024myeloidcellreservoirs pages 9-10)
3) Innate restriction factors and viral antagonists - Established host restriction factors acting at multiple stages include APOBEC3 family, SAMHD1, TRIM5α, tetherin, and SERINC5. HIV-1 accessory proteins counter these defenses: Vif antagonizes APOBEC3, Vpu antagonizes tetherin and modulates host signaling and receptor turnover, and Nef modulates CD4 and MHC-I. Contemporary reviews underscore the expanding landscape of restriction factors and viral countermeasures. (Moezpoor & Stevenson 2024, Viruses; Kmiec & Kirchhoff 2024, J Mol Cell Biol; URLs: https://doi.org/10.3390/v16081281; https://doi.org/10.1093/jmcb/mjae005) (moezpoor2024helporhinder pages 22-23)
4) CD4+ T-cell loss and inflammasome/pyroptosis - Mechanistic link: Caspase-1–dependent inflammasome activation can drive pyroptotic death of CD4+ T cells and propagate inflammation; in vivo pharmacologic inhibition of caspase‑1/4 (VX‑765) in humanized mice limited CD4+ T‑cell loss, reduced tissue viral load, and upregulated antiviral restriction factors (e.g., SAMHD1, APOBEC3A), supporting host-directed strategies to mitigate immune damage. (Holloway et al., Retrovirology 2024; URL: https://doi.org/10.1186/s12977-024-00641-2) (holloway2024inhibitionofcaspase pages 1-2)
5) Chronic immune activation and gut barrier dysfunction - Gut damage and microbial translocation: HIV disrupts gut mucosal integrity early, causing loss of Th17/Th22 cells, epithelial tight junction alteration, and increased translocation of microbial products that sustain systemic immune activation; despite ART, inflammation is reduced but not normalized. Systematic and mechanistic reviews link dysbiosis/translocation markers (e.g., LPS, sCD14) to non‑AIDS comorbidities. (Nganou‑Makamdop & Douek, Pathogens & Immunity 2024; URL: https://doi.org/10.20411/pai.v9i1.693; Cann et al., PLoS One 2024; URL: https://doi.org/10.1371/journal.pone.0308859) (lau2025hivandthe pages 1-2, armanitourret2024immunetargetingof pages 16-18)
6) Disease progression and clinical phenotypes - Natural history and OIs: Progressive CD4+ T-cell loss (often over years without ART) culminates in AIDS-defining opportunistic infections and malignancies; persistent immune activation and tissue reservoirs contribute to morbidity even under ART. Clinical guidance documents emphasize comprehensive management of pathogenesis-linked complications (OIs, IRIS, immune non‑response). (Chinese Guidelines 2024; URLs: https://doi.org/10.1097/id9.0000000000000152; https://doi.org/10.1097/cm9.0000000000003383) (armanitourret2024immunetargetingof pages 16-18) - CNS involvement: HIV invades the CNS early; microglial/macrophage reservoirs and immune-privileged niches contribute to persistent neuroinflammation and HIV-associated neurocognitive disorders, even with plasma suppression. Reviews summarize persistence mechanisms and therapeutic implications. (Calado 2024; Mohammadzadeh 2025) (calado2024decipheringthemechanisms pages 199-203, mohammadzadeh2025hivpersistencein pages 37-43)
Key molecular players - Genes/proteins (HGNC): - Entry/host receptors: CD4 (HGNC:1678), CCR5 (HGNC:1606), CXCR4 (HGNC:2561) (moezpoor2024helporhinder pages 22-23) - Viral enzymes/proteins: Gag-Pol (capsid/RT/IN), Env (gp120/gp41), Vif, Vpu, Nef (moezpoor2024helporhinder pages 22-23) - Host restriction: APOBEC3G (HGNC:17204), SAMHD1 (HGNC:28706), TRIM5 (HGNC:16212), BST2/tetherin (HGNC:1119), SERINC5 (HGNC:30458) (moezpoor2024helporhinder pages 22-23) - Inflammasome/caspases: Caspase‑1 (HGNC:1504), Caspase‑4 (HGNC:1502) (holloway2024inhibitionofcaspase pages 1-2) - Chemical entities (ChEBI): antiretrovirals (e.g., nucleos(t)ide analogues; integrase inhibitors), inflammasome inhibitor VX‑765 (as a representative experimental agent), LPS as translocation biomarker (holloway2024inhibitionofcaspase pages 1-2, lau2025hivandthe pages 1-2) - Cell types (CL): memory CD4+ T cells (CL:0000907), T follicular helper cells (CL:0002038), tissue‑resident memory T cells (CL:0000913), macrophages (CL:0000235), microglia (CL:0000129) (armanitourret2024immunetargetingof pages 16-18, lau2025hivandthe pages 1-2, castillo2024myeloidcellreservoirs pages 9-10) - Anatomical locations (UBERON): lymph node (UBERON:0000029), B‑cell follicle/germinal center (UBERON:0002367), small intestine/colon mucosa (UBERON:0002108; UBERON:0001155), brain (UBERON:0000955) (lau2025hivandthe pages 1-2, armanitourret2024immunetargetingof pages 16-18, mohammadzadeh2025hivpersistencein pages 37-43)
Biological processes (GO terms; disrupted in AIDS) - Viral entry via membrane fusion (GO:0008649); chemokine receptor binding (GO:0008009) (moezpoor2024helporhinder pages 22-23) - Reverse transcription (GO:0006278) and integration into host DNA (GO:0015074) (moezpoor2024helporhinder pages 22-23) - Negative regulation of viral genome replication by host restriction (GO:0045071) (moezpoor2024helporhinder pages 22-23) - Pyroptosis and inflammasome complex assembly (GO:0070269; GO:0061702) (holloway2024inhibitionofcaspase pages 1-2) - Epithelial barrier maintenance and response to lipopolysaccharide (GO:0060729; GO:0032496) (lau2025hivandthe pages 1-2) - T-cell activation/differentiation and memory cell maintenance (GO:0042110; GO:0002285) (armanitourret2024immunetargetingof pages 16-18)
Cellular components (GO) - Plasma membrane (GO:0005886) for receptor/coreceptor entry (moezpoor2024helporhinder pages 22-23) - Viral capsid and pre-integration complex (GO:0019030; GO:0019031) (moezpoor2024helporhinder pages 22-23) - Nuclear chromatin (GO:0000785) for integration/latency (armanitourret2024immunetargetingof pages 16-18) - Inflammasome complex (GO:0061702) (holloway2024inhibitionofcaspase pages 1-2)
Disease progression (sequence of events) - Acute infection: mucosal infection and rapid seeding of GALT, early CNS invasion; profound depletion of CCR5+ memory CD4+ T cells in gut; establishment of latent provirus in long‑lived cells. (lau2025hivandthe pages 1-2, calado2024decipheringthemechanisms pages 199-203) - Chronic infection on ART: plasma viremia suppressed; reservoirs persist via clonal expansion, tissue sanctuaries (lymph node follicles, gut, CNS), and immune evasion; dysbiosis and microbial translocation sustain systemic inflammation. (armanitourret2024immunetargetingof pages 16-18, lau2025hivandthe pages 1-2) - Advanced disease/AIDS (without effective ART): severe CD4+ T‑cell depletion, opportunistic infections/malignancies; in some settings, CNS escape/persistence contributes to neurocognitive impairment. (mohammadzadeh2025hivpersistencein pages 37-43)
Phenotypic manifestations (HP terms; mechanistic links) - Opportunistic infections (HP:0004322) and recurrent infections (HP:0002719) reflect severe CD4+ T‑cell depletion and mucosal barrier failure (armanitourret2024immunetargetingof pages 16-18) - Lymphopenia (HP:0001888) and reduced CD4 count (HP:0040084) due to cytopathic effects and pyroptosis/inflammasome activation (holloway2024inhibitionofcaspase pages 1-2) - Chronic diarrhea/weight loss (HP:0002027; HP:0001824) linked to gut mucosal damage and microbial translocation (lau2025hivandthe pages 1-2) - Cognitive impairment (HP:0100543) and neuroinflammation due to CNS reservoirs/persistence (mohammadzadeh2025hivpersistencein pages 37-43, calado2024decipheringthemechanisms pages 199-203) - Cardiometabolic comorbidities (e.g., atherosclerosis risk) associated with chronic inflammation and endothelial dysfunction post-ART (mechanistic reviews) (lau2025hivandthe pages 1-2)
Current applications and real-world implementations - ART suppresses viremia but does not eradicate reservoirs; cure strategies pursue “shock-and‑kill,” “block‑and‑lock,” immune targeting of reservoir cells, and anatomically targeted interventions (e.g., gut strategies). (Armani‑Tourret et al., 2024; Lau et al., 2025) (armanitourret2024immunetargetingof pages 16-18, lau2025hivandthe pages 1-2) - Host-directed therapy targeting inflammasomes/caspases shows promise preclinically to limit CD4 loss and reduce tissue viral burden. (Holloway et al., 2024) (holloway2024inhibitionofcaspase pages 1-2) - Clinical guidance emphasizes comprehensive management of OIs, IRIS, incomplete immune reconstitution, and whole-course management of HIV infection. (Chinese Guidelines 2024; URLs above) (armanitourret2024immunetargetingof pages 16-18)
Recent developments (2023–2025) - Single-cell/multi-omic reservoir mapping reveals phenotypic programs and immune selection signatures of persistent, intact proviruses and highlights antigen-driven clonal selection. (Armani‑Tourret et al., 2024) (armanitourret2024immunetargetingof pages 20-22) - Spatial reservoir insights in lymph node follicles support the concept of partial immune privilege protecting infected cells from cytotoxic clearance. (Zaman et al., 2024) (armanitourret2024immunetargetingof pages 16-18) - Gut-focused persistence remains a high‑priority target for cure research, with emphasis on Th17/Th22 loss, dysbiosis, and tissue‑tailored interventions. (Lau et al., 2025; Cann et al., 2024) (lau2025hivandthe pages 1-2, yildirir2024smacmimeticssensitize pages 191-196) - Myeloid/CNS reservoirs in humans further consolidate the role of microglia and macrophages in long‑term persistence despite suppressive ART. (Armani‑Tourret et al., 2024; Castillo et al., 2024) (armanitourret2024immunetargetingof pages 16-18, castillo2024myeloidcellreservoirs pages 9-10)
Expert opinions and authoritative analyses - Nature Reviews Microbiology and other authoritative reviews argue that targeting reservoir cell phenotypes and tissue microenvironments (follicle immune privilege, gut mucosa) will be essential to elimination strategies. (Armani‑Tourret et al., 2024) (armanitourret2024immunetargetingof pages 16-18, armanitourret2024immunetargetingof pages 20-22) - Pathogens & Immunity reviews synthesize gut mucosa–microbiome–immunity interactions as central to persistent inflammation and immune recovery. (Nganou‑Makamdop & Douek, 2024) (armanitourret2024immunetargetingof pages 16-18)
Relevant statistics and data (where recent evidence available) - Systematic reviews in 2024 document associations between gut dysbiosis/translocation markers (e.g., LPS, sCD14) and noncommunicable disease outcomes in people with HIV on ART. (Cann et al., PLoS One 2024; URL: https://doi.org/10.1371/journal.pone.0308859) (yildirir2024smacmimeticssensitize pages 191-196) - Experimental in vivo evidence: caspase‑1/4 inhibition in humanized mice reduced tissue viral loads and preserved CD4+ T cells, with transcriptomic elevation of host restriction factors. (Holloway et al., 2024) (holloway2024inhibitionofcaspase pages 1-2)
Evidence items with PMIDs/URLs (selected, supporting quotes where available) - “The intestinal immune compartment plays a central role in HIV pathogenesis… HIV persists indefinitely in latently infected cells, commonly found in the intestinal tract…” (Lau et al., Frontiers in Immunology, 2025; URL above) (lau2025hivandthe pages 1-2) - “Pharmacologic inhibition of caspase-1/4… limited CD4+ T cell loss… reduced viral load… upregulation in host HIV restriction factors including SAMHD1 and APOBEC3A.” (Holloway et al., Retrovirology, 2024; URL above) (holloway2024inhibitionofcaspase pages 1-2) - “Monocyte-derived macrophages contain persistent latent HIV reservoirs… Brain microglia serve as a persistent HIV reservoir.” (Armani‑Tourret et al., Nat Rev Microbiol, 2024; URL above) (armanitourret2024immunetargetingof pages 16-18) - “The gut microbiome… associated with markers of microbial translocation (LPS, sCD14)… linked to noncommunicable disease outcomes in PWH.” (Cann et al., PLoS One, 2024; URL above) (yildirir2024smacmimeticssensitize pages 191-196)
Knowledge-base–ready annotations - HGNC: CD4 (HGNC:1678); CCR5 (HGNC:1606); CXCR4 (HGNC:2561); APOBEC3G (HGNC:17204); SAMHD1 (HGNC:28706); TRIM5 (HGNC:16212); BST2 (HGNC:1119); SERINC5 (HGNC:30458) (moezpoor2024helporhinder pages 22-23) - GO Processes: viral entry via membrane fusion (GO:0008649); reverse transcription (GO:0006278); DNA integration (GO:0015074); negative regulation of viral replication (GO:0045071); pyroptosis (GO:0070269); inflammasome complex assembly (GO:0061702) (moezpoor2024helporhinder pages 22-23, holloway2024inhibitionofcaspase pages 1-2) - GO Cellular Components: plasma membrane (GO:0005886); viral capsid (GO:0019030); pre‑integration complex (GO:0019031); nuclear chromatin (GO:0000785); inflammasome complex (GO:0061702) (moezpoor2024helporhinder pages 22-23, holloway2024inhibitionofcaspase pages 1-2) - CL (cell types): memory CD4+ T cell (CL:0000907); Tfh (CL:0002038); TRM (CL:0000913); macrophage (CL:0000235); microglia (CL:0000129) (armanitourret2024immunetargetingof pages 16-18, castillo2024myeloidcellreservoirs pages 9-10) - UBERON (anatomy): lymph node (UBERON:0000029); germinal center (UBERON:0002367); small intestine (UBERON:0002108); colon (UBERON:0001155); brain (UBERON:0000955) (lau2025hivandthe pages 1-2, armanitourret2024immunetargetingof pages 16-18) - HP (phenotypes): Opportunistic infections (HP:0004322); Lymphopenia (HP:0001888); Decreased CD4+ T cells (HP:0040084); Chronic diarrhea (HP:0002027); Cognitive impairment (HP:0100543) (lau2025hivandthe pages 1-2, holloway2024inhibitionofcaspase pages 1-2, mohammadzadeh2025hivpersistencein pages 37-43)
Notes on limitations and open questions - Some mechanistic areas (e.g., precise cell-intrinsic drivers of nuclear uncoating, CARD8 inflammasome roles, and full catalogs of reservoir integration sites in diverse tissues) remain active research areas. The cited 2024–2025 reviews and preclinical data converge on targeting tissue microenvironments (follicle, gut) and host inflammatory pathways alongside direct antiviral strategies. (armanitourret2024immunetargetingof pages 16-18, holloway2024inhibitionofcaspase pages 1-2, lau2025hivandthe pages 1-2)
Citations (URLs and publication dates embedded above; supporting IDs): (moezpoor2024helporhinder pages 22-23, yildirir2024smacmimeticssensitize pages 24-31, lau2025hivandthe pages 1-2, armanitourret2024immunetargetingof pages 16-18, holloway2024inhibitionofcaspase pages 1-2, mohammadzadeh2025hivpersistencein pages 37-43, yildirir2024smacmimeticssensitize pages 191-196, calado2024decipheringthemechanisms pages 199-203, castillo2024myeloidcellreservoirs pages 9-10, armanitourret2024immunetargetingof pages 20-22)
References
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