This is a mechanism module, not a specific disease. Disorder entries reference individual nodes via conforms_to (e.g., "drug_induced_nephrotoxicity#Proximal Tubular Epithelial Cell Death"). Conforming nodes should substitute the drug-specific uptake/transport route (e.g. OCT2/cisplatin, megalin-endocytosis/aminoglycosides) while preserving the conserved uptake → oxidative/mitochondrial stress → tubular cell death → inflammation → AKI chain. The key conformance / central-effector target is "drug_induced_nephrotoxicity#Proximal Tubular Epithelial Cell Death".
Nephrotoxic Drug Exposure and Tubular Uptake
trigger
The conserved initiating lesion is renal handling of the drug: the proximal tubule is exposed to filtered and secreted compounds and takes them up via apical endocytosis or basolateral organic anion/cation transporters, leading to intracellular accumulation. This renal handling, combined with the drug's inherent toxicity, concentrates the insult in tubular epithelial cells.
Downstream
-
Tubular Oxidative Stress and Mitochondrial Injury
Accumulated drug provokes oxidative and mitochondrial stress in tubular cells.
Show evidence (2 references)
"The (mainly proximal) tubules are exposed via apical contact with the compounds secreted into the tubular lumen, their uptake by the tubular epithelial cells"
Establishes proximal tubular exposure and uptake of drugs as the initiating step of nephrotoxicity captured by this trigger node. Evidence source is OTHER because this is a review article.
"Transport of tenofovir and cisplatin by organic anion and cation transporters in the basolateral surface of the proximal tubule, respectively, are associated with intracellular drug accumulation and injury."
Gives the transporter-mediated mechanism by which nephrotoxins accumulate in proximal tubular cells, the insult-agnostic substitution point of this node. Evidence source is OTHER because this is a review article.
Tubular Oxidative Stress and Mitochondrial Injury
amplifier
Intracellular drug accumulation generates reactive oxygen species and damages mitochondria in the metabolically active proximal tubule, the major amplifying event linking drug uptake to tubular cell death.
Downstream
-
Proximal Tubular Epithelial Cell Death
Oxidative and mitochondrial injury precipitate tubular epithelial cell death.
Show evidence (2 references)
"The pathophysiology of cisplatin-induced AKI involves proximal tubular injury, apoptosis, oxidative stress, inflammation, and vascular injury in the kidneys."
Lists oxidative stress among the core pathophysiologic mechanisms of nephrotoxic tubular injury, the amplifier step of this module. Evidence source is OTHER because this is a review article.
"Pathways involved in AKI include apoptosis, necrosis, inflammation, and increased oxidative stress"
Independently identifies increased oxidative stress as a pathway in nephrotoxic AKI. Evidence source is OTHER because this is a review article.
Proximal Tubular Epithelial Cell Death
central effector
Oxidative and mitochondrial injury precipitate proximal tubular epithelial cell death by apoptosis and acute tubular necrosis (ATN). This is the central effector lesion and the key conformance target; conforming disorder nodes substitute the drug-specific upstream driver but converge here.
Downstream
-
Tubulointerstitial Inflammation
Dying tubular cells release signals that recruit inflammatory cells.
-
Acute Kidney Injury
Loss of functional tubular epithelium reduces kidney function.
Show evidence (2 references)
"drug-induced nephrotoxicity develops according to one of the three mechanisms: (1) proximal tubular injury and acute tubular necrosis (ATN) (a dose-dependent mechanism)"
Names proximal tubular injury and acute tubular necrosis as the principal dose-dependent mechanism of drug nephrotoxicity, the effector captured here. Evidence source is OTHER because this is a review article.
"Pathways involved in AKI include apoptosis, necrosis, inflammation, and increased oxidative stress"
Identifies apoptosis and necrosis as the cell-death pathways of nephrotoxic AKI. Evidence source is OTHER because this is a review article.
Tubulointerstitial Inflammation
amplifier
Tubular cell death releases damage-associated signals that drive tubulointerstitial inflammation, which amplifies and extends the tubular injury.
Downstream
-
Acute Kidney Injury
Sustained inflammatory injury extends nephron loss toward clinical AKI.
Show evidence (1 reference)
"The pathophysiology of cisplatin-induced AKI involves proximal tubular injury, apoptosis, oxidative stress, inflammation, and vascular injury in the kidneys."
Lists inflammation among the core mechanisms amplifying nephrotoxic tubular injury. Evidence source is OTHER because this is a review article.
Acute Kidney Injury
consequence
Accumulated tubular cell loss and inflammation reduce the glomerular filtration rate, producing acute kidney injury — the defining clinical consequence and frequently a dose-limiting toxicity that necessitates dose reduction or drug withdrawal.
Show evidence (2 references)
"Acute kidney injury (AKI), formerly known as acute renal failure, is described as a rapid decrease in the glomerular filtration rate"
Defines acute kidney injury as a rapid fall in glomerular filtration rate, the consequence endpoint of this module. Evidence source is OTHER because this is a review article.
"Drug-related acute tubular/tubulointerstitial injury is the most common cause of AKI associated with these agents."
Establishes drug-related tubular injury as the most common cause of medication-associated AKI, the consequence of this module. Evidence source is OTHER because this is a review article.