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The heat-stable enterotoxin peptides (ST) produced byenterotoxigenicEscherichia coliare one of the major causesof transitory diarrhea in the developing world. Toxin bind-ing to its receptor, guanylyl cyclase C (GC-C), results inreceptor activation and the production of high intracellularlevels of cGMP. GC-C is expressed in two differentiallyglycosylated forms in intestinal epithelial cells. Prolongedexposure of human colonic cell lines to ST peptides inducescellular refractoriness to the ST peptide, in terms of intra-cellular cGMP accumulation....
Nội dung trích xuất từ tài liệu:
Báo cáo khoa học: Cellular refractoriness to the heat-stable enterotoxin peptide is associated with alterations in levels of the differentially glycosylated forms of guanylyl cyclase C
