Intracellular Pathways Regulating Apoptosis (N/A)

Intracellular pathways regulating apoptosis are complex signaling networks that determine whether a cell undergoes programmed cell death (apoptosis) in response to various internal and external stimuli. These pathways are essential for maintaining tissue homeostasis, development, and defense against disease. Dysregulation can lead to cancer, autoimmune disorders, or degenerative diseases. Key pathways include the intrinsic (mitochondrial) pathway, triggered by intracellular stress and regulated by Bcl-2 family proteins, and the extrinsic (death receptor) pathway, initiated by extracellular ligands binding to death receptors. These pathways converge on the activation of caspases, leading to cellular dismantling. Regulation occurs through kinase signaling, transcriptional control, and inhibitor proteins. Common triggers include DNA damage, oxidative stress, and growth factor deprivation. Activation leads to characteristic morphological changes and phagocytic clearance without inflammation.

Other names

Apoptosis pathwaysProgrammed cell death pathwaysIntrinsic apoptosis pathwayExtrinsic apoptosis pathwayMitochondrial apoptosis pathwayDeath receptor pathway

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