Renal tubular cell apoptosis pathway

The renal tubular cell apoptosis pathway encompasses the molecular signaling events leading to programmed cell death in renal tubular epithelial cells, especially under pathologic conditions such as ischemia, sepsis, oxidative stress, and exposure to nephrotoxic agents[1][2][3]. Apoptosis is initiated through intrinsic (mitochondrial; regulated by Bcl-2 family proteins such as Bax and Bak) and extrinsic (death receptor-mediated, including Fas/CD95 and TNF receptor superfamily) mechanisms, converging on effector caspases like caspase-3[1][3]. Key upstream stimuli include oxidative stress, endoplasmic reticulum (ER) stress (involving the PERK-eIF2α-ATF4-CHOP axis), and activation of stress kinases such as JNK and p38 MAPK[4][5]. Excessive apoptosis contributes to the loss of renal tubular cells, progression of acute kidney injury, tubulointerstitial fibrosis, and chronic kidney disease, whereas therapeutic modulation—via agents targeting pathway intermediates—can promote renal recovery and mitigate disease progression[1][2][4][5][6]. The pathway itself is not a singular drug target, but several of its molecular components (e.g., SIRT1, HRD1, JNK/p38, caspases, Bcl-2 family proteins) are studied as potential targets for intervention[1][2][3][4][5][6].

Other names

Renal tubular epithelial cell apoptosis pathwayApoptosis pathway in renal tubular cellTubular cell death pathway

Inhibition of apoptosis signaling cascades (e.g., blocking caspases, Bcl-2 family modulation)[1][3][4][5][6] Reduction of oxidative stress[5][6] Modulation of ER stress and PERK-eIF2α-ATF4-CHOP pathway[4] SIRT1 activation for anti-apoptotic and anti-inflammatory effects[6] Inhibition of stress kinases (JNK/p38)[5]