Involvement of two-pore channels in hydrogen peroxide-induced increase in the level of calcium ions in the cytoplasm of human umbilical vein endothelial cells


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Abstract

Hydrogen peroxide at concentrations below cytotoxic ones causes an increase in the cytoplasmic calcium concentration in human umbilical vein endothelial cells as a result of calcium release from intracellular stores. Two-pore calcium channel blocker trans-NED19 partially suppresses the increase in the level of calcium ions in the cells in response to the addition of hydrogen peroxide. The staining of endothelial cells with the fluorescent stereoisomer cis-NED19 and LysoTracker confirmed the localization of two-pore calcium channels in lysosomes and endolysosomal vesicles.

About the authors

P. V. Avdonin

Koltzov Institute of Developmental Biology

Author for correspondence.
Email: pvavdonin@yandex.ru
Russian Federation, Moscow, 119334

A. D. Nadeev

Institute of Biophysics, Pushchino Branch; Sechenov Institute of Evolutionary Physiology and Biochemistry

Email: pvavdonin@yandex.ru
Russian Federation, Pushchino, Moscow oblast, 142290; St. Petersburg, 194223

E. B. Tsitrin

Koltzov Institute of Developmental Biology

Email: pvavdonin@yandex.ru
Russian Federation, Moscow, 119334

A. A. Tsitrina

Koltzov Institute of Developmental Biology

Email: pvavdonin@yandex.ru
Russian Federation, Moscow, 119334

P. P. Avdonin

Koltzov Institute of Developmental Biology

Email: pvavdonin@yandex.ru
Russian Federation, Moscow, 119334

G. Yu. Mironova

Koltzov Institute of Developmental Biology

Email: pvavdonin@yandex.ru
Russian Federation, Moscow, 119334

I. L. Zharkikh

Research Institute of General Pathology and Pathophysiology

Email: pvavdonin@yandex.ru
Russian Federation, Moscow, 125315

N. V. Goncharov

Sechenov Institute of Evolutionary Physiology and Biochemistry; Research Institute of Hygiene, Occupational Pathology, and Human Ecology

Email: pvavdonin@yandex.ru
Russian Federation, St. Petersburg, 194223; Kapitolovo, Leningrad oblast, 188663

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