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Can I read The phosphatase inhibitor okadaic acid blocks KCl-depolarization-induced rise of cytosolic calcium of rat insulinoma cells (RINm5F) on EtoBox?
The phosphatase inhibitor okadaic acid blocks KCl-depolarization-induced rise of cytosolic calcium of rat insulinoma cells (RINm5F) by H. P. T. Ammon; R. O. Heurich; H-A. Kolb; F. Lang; R. Schaich; G. Drews; T. Leiers is a Biochemistry, Genetics and Molecular Biology article available to read on EtoBox.
What is The phosphatase inhibitor okadaic acid blocks KCl-depolarization-induced rise of cytosolic calcium of rat insulinoma cells (RINm5F) about?
It has been shown that okadaic acid (OA) diminishes insulin secretion of rat pancreatic islets in response to glucose, glyceraldehyde and KCl. Glucose, glyceraldehyde and KCl cause release of insulin by depolarization and subsequent opening of L-type calcium channels. Calcium entry into cells is thought to be related to protein phosphorylation. To evaluate whether or not OA mediated inhibition of insulin secretion in response to depolarization might be due to an interference with calcium uptake, we studied its effect on KCl (30 mM)-induced increases of cytosolic calcium and discharge of insulin in the insulin secreting clonal tumor cell line RINm5F. OA inhibited KCl-stimulated insulin release in concentrations > or = 1 microM. In intact RINm5F cells similar concentrations of OA decreased the activity of protein phosphates PP-1/PP-2A and inhibited the depolarization-induced rise of cytosolic calcium ([Ca2+]i). The latter action could also be achieved with the protein phosphatase inhibitor calyculin A, whereas the OA analogue 1-nor-okadaone, which is without effect on phosphatases, did not affect [Ca2+]i or insulin release. It is concluded that depression of depolarization-induced in
Who reads The phosphatase inhibitor okadaic acid blocks KCl-depolarization-induced rise of cytosolic calcium of rat insulinoma cells (RINm5F)?
It is typically read by researchers, students, and practitioners in Biochemistry, Genetics and Molecular Biology.
- Author
- H. P. T. Ammon; R. O. Heurich; H-A. Kolb; F. Lang; R. Schaich; G. Drews; T. Leiers
- Publisher
- Springer-Verlag; Springer Verlag; Springer Science and Business Media LLC; Society for Mining, Metallurgy and Exploration Inc. (ISSN 0028-1298)
- Published
- 1996
- Language
- EN
- Field
- Biochemistry, Genetics and Molecular Biology (Life Sciences)