Figure_6.tif (567.48 kB)
H2O2 increases the Ca2+ sensitivity of force production in vascular smooth muscle cells.
figure
posted on 2014-08-05, 06:54 authored by Viktória Csató, Attila Pető, Ákos Koller, István Édes, Attila Tóth, Zoltán PappThe changes in intracellular Ca2+ levels and arteriolar diameters were studied in skeletal muscle arterioles under control conditions (panel A; n = 5 arterioles from 3 different animals), or after treatment with norepinephrine (panel B; n = 5 arterioles from 3 different animals), or by addition of the TXA2 receptor agonist U46619 (0.1 nM–10 µM; panel C; n = 5 arterioles from 4 different animals). Experiments were also performed in the presence of H2O2 together with Src kinase inhibitor, (Src inhibitor-1, 5 µM n = 4 arterioles from 3 different animals, 20-min preincubation; panel D). Asterisks denote significant differences from the initial values.