Title : Role of protein kinase C in the regulation of histamine and bradykinin stimulated inositol polyphosphate turnover in adrenal chromaffin cells.

Pub. Date : 1992 Dec

PMID : 1467836






5 Functional Relationships(s)
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1 Histamine (100 microM) or bradykinin (100 nM) evoked rapid increases in inositol 1,4,5-trisphosphate (Ins(1,4,5)P3) and inositol 1,3,4,5-tetrakisphosphate (Ins(1,3,4,5)P4) mass accumulations (maximal accumulations within 10 s and 30 s, respectively) which declined towards basal values over a 10 min incubation period. Inositol 1,4,5-Trisphosphate kininogen 1 Bos taurus
2 Histamine (100 microM) or bradykinin (100 nM) evoked rapid increases in inositol 1,4,5-trisphosphate (Ins(1,4,5)P3) and inositol 1,3,4,5-tetrakisphosphate (Ins(1,3,4,5)P4) mass accumulations (maximal accumulations within 10 s and 30 s, respectively) which declined towards basal values over a 10 min incubation period. Inositol 1,4,5-Trisphosphate kininogen 1 Bos taurus
3 TPA (1 microM) significantly attenuated the peak Ins(1,4,5)P3 response to bradykinin and histamine by 30% and 70% respectively. Inositol 1,4,5-Trisphosphate kininogen 1 Bos taurus
4 Ro 31-8220 (10 microM) significantly enhanced the maximal Ins(1,4,5)P3 accumulations elicited by both bradykinin and histamine. Inositol 1,4,5-Trisphosphate kininogen 1 Bos taurus
5 The results indicate that the initial Ins(1,4,5)P3 response to either bradykinin or histamine in bovine adrenal chromaffin cells can be attenuated by PKC activation by phorbol ester and enhanced by PKC inhibition by Ro 31-8220. Inositol 1,4,5-Trisphosphate kininogen 1 Bos taurus