Hemolysin of Aeromonas sobria stimulates production of cyclic AMP by cultured cells.
Hemolysin of Aeromonas sobria possesses both cytotoxic activity against mammalian cells and enterotoxic activity. Histopathological examination revealed that hemolysin causes diarrhea without damaging the intestinal epithelial cells. And the fluid accumulated in the mouse intestinal loop by the action of the hemolysin is watery. These observations indicated that the enterotoxic activity of hemolysin is not dependent on its cytotoxic activity. To clarify the mechanism of the enterotoxic action of hemolysin, we examined cyclic nucleotide levels in cultured cells exposed to this toxin. These results showed that hemolysin stimulates the production of cyclic AMP in cultured cells and the cyclic AMPs thus produced emerge in the milieu of cells.
Institute of Pharmacognosy, Faculty of Pharmaceutical Sciences, Tokushima Bunri University, Japan.
Y
Y
Fujii
T
T
Nomura
K
K
Okamoto
D000333:Aeromonas / Q000737:chemistry*; D001427:Bacterial Toxins / Q000494:pharmacology*; D000242:Cyclic AMP / Q000378:metabolism*; D004305:Dose-Response Relationship, Drug; D006460:Hemolysin Proteins / Q000494:pharmacology*; D007770:L-Lactate Dehydrogenase / Q000378:metabolism; D013997:Time Factors; D014407:Tumor Cells, Cultured / Q000187:drug effects / Q000378:metabolism
D001427:Bacterial Toxins; D006460:Hemolysin Proteins; D000242:Cyclic AMP; D007770:L-Lactate Dehydrogenase