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ISSN 2522-9028 (Print)
ISSN 2522-9036 (Online)
DOI: https://doi.org/10.15407/fz

Fiziologichnyi Zhurnal

is a scientific journal issued by the

Bogomoletz Institute of Physiology
National Academy of Sciences of Ukraine

Editor-in-chief: V.F. Sagach

The journal was founded in 1955 as
1955 – 1977 "Fiziolohichnyi zhurnal" (ISSN 0015 – 3311)
1978 – 1993 "Fiziologicheskii zhurnal" (ISSN 0201 – 8489)
1994 – 2016 "Fiziolohichnyi zhurnal" (ISSN 0201 – 8489)
2017 – "Fiziolohichnyi zhurnal" (ISSN 2522-9028)

Fiziol. Zh. 2011; 57(4): 77-81


Effect of vasopressin on the membrane potential of rat hepatocytes

Tsapenko PK, Liashchenko TP

    Taras Shevchenko Kyiv National University, Ukraine
DOI: https://doi.org/10.15407/fz57.04.077

Abstract

The current-voltage relationship of rat hepatocytes was investigated and its linear dependence was shown. On liver slices, we have investigated the effects of vasopressin on membrane potential of rat hepatocytes using microelectrode technique. Vasopressin evoked membrane hyperpolarization to -50 m V, suggesting that vasopressin activated synthetic processes in hepatocytes. Vasopressin application together with the inhibitor of protein kinase C chelerytrine also caused hyperpolarization of hepatocytes, but membrane potential changes were of smaller amplitude. This fact suggests that although protein kinase C plays an important role in the realization of effects of vasopressin, there is, however, another signal transduction pathway of vasopressin in rat hepato-cytes. If that pathway activates adenylatecyclase, vasopressin can stimulate bile formation in hepatocytes. This assumption should be verified.

Keywords: vasopressin, hepatocytes, membrane potential,protein kinase C.

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