Dying enterocytes downregulate signaling pathways converging on Ras: rescue by protease inhibition.


Organ and cell cultures of the small intestine serve as excellent in vitro models for programmed cell death (PCD). Cells cultured in serum-free, minimal medium rapidly died, as evidenced by histological changes, internucleosomal DNA cleavage, and TdT-mediated dUTP nick end labeling. Cell death was pervasive, although nonepithelial cells within the… (More)


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