Hepatic stellate cell apoptosis pathway

The hepatic stellate cell apoptosis pathway encompasses multiple signaling mechanisms—including death receptor (e.g., TRAIL, Fas), mitochondrial/apoptosome, and growth factor–regulated pathways—that lead to programmed cell death of activated hepatic stellate cells in the liver. HSC apoptosis is a critical determinant of hepatic fibrosis regression, as it removes the main source of scar tissue in liver injury. Regulation of this pathway involves intrinsic signals (Bcl-2 family, mitochondrial pathways) and extrinsic signals (death receptors via ligands such as TRAIL, Fas ligand), as well as modulation by cytokines and growth factors (PDGF, TGF-β, IGF). Many drugs and therapeutic approaches target components of these pathways to induce or inhibit HSC death for treating liver fibrosis and related diseases.

Other names

HSC apoptosis pathwayHepatic stellate cell programmed cell death pathwayHSC death signaling

Activation of apoptosis via death receptor signaling, such as by TRAIL or Fas ligand; Inhibition of survival signaling (e.g., Akt, NF-κB inhibition leading to apoptosis); Induction of mitochondrial outer membrane permeabilization (intrinsic apoptosis); Modulation of growth factor/cytokine signals affecting HSC survival (e.g., PDGF, TGF-β, IGF).