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Epithelial cell apoptosis process
- Molecular classification
- Other (biological process, not a molecular classification)
01
Overview
Epithelial cell apoptosis is a regulated cellular process vital for removing unneeded, damaged, or potentially dangerous epithelial cells. It involves two main molecular pathways: the intrinsic (mitochondrial) pathway, regulated by Bcl-2 family proteins, and the extrinsic (death receptor) pathway, mediated by receptors such as Fas and TNF receptors. Execution of apoptosis in epithelial tissues is essential for maintaining tissue integrity—dying epithelial cells signal neighbors to promote their extrusion and preserve barrier function. Dysregulation of this process is linked to disease: excessive apoptosis can lead to tissue breakdown, while defective apoptosis enables tumor development.
- Other names
- Apoptosis in epithelial cellsprogrammed cell death in epitheliumepithelial apoptosis
02
Biological functions
Cell deathTissue homeostasisRemoval of damaged or unneeded cellsBarrier maintenance in epithelium
03
Disease associations
Cancer (dysregulated apoptosis enables tumor progression)InfectionInflammatory diseaseTissue degeneration
04
Safety considerations
Excessive epithelial apoptosis compromises barrier function; insufficient apoptosis contributes to cancer
05
Biomarkers
Caspase activation (caspase-3, caspase-8, caspase-9)Phosphatidylserine exposure (detected by Annexin V staining)DNA fragmentation (TUNEL assay)
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