@article{APS8315,
author = {Wei-zhong Zhu and Ben-bo Gao and He-wang Li and You-yi Zhang and Qi-de Han},
title = {Tyrosine kinase participates in alpha 1A-adrenoceptor-mediated increase of intracellular calcium in human embryo kidney 293 cells.},
journal = {Acta Pharmacologica Sinica},
volume = {20},
number = {11},
year = {2016},
keywords = {},
abstract = {AIM:
To determine the role of protein-tyrosine kinase (PTK) in alpha 1A-adrenoceptor-mediated increase of [Ca2+]i (intracellular calcium) in human embryo kidney (HEK) 293 cells expressed alpha 1A-adrenoceptor.
METHODS:
Effects of two PTK inhibitors: genistein and tyrphostin, were investigated on the increase of [Ca2+]i by using Fura-2, The activity of PTK was measured and the accumulation of [3H] InsPs were observed.
RESULTS:
Norepinephrine stimulated a rapid increase in [Ca2+]i to (371 +/- 31) nmol.L-1 in HEK 293 cells. Norepinephrine-induced increase of [Ca2+]i was inhibited by the tyrosine kinase inhibitors quercetin and tyrphostin by 23.8% and 21.4%, respectively, but the accumulation of [3H]InsPs induced by norepinephrine was not. The activity of the plasma-associated tyrosine kinase was increased to (1.73 +/- 0.72)-fold over the control by norepinephrine 10 mumol.L-1. The norepinephrine-activated PTK was inhibited by calphostin C and depletion of intra- and extra-cellular Ca2+.
CONCLUSION:
The PTK participates in mobilization of Ca2+ mediated by alpha 1A-adrenoceptors in HEK 293 cell lines.},
issn = {1745-7254}, url = {http://www.chinaphar.com/article/view/8315}
}