Effects of pioglitazone on calcium channels in vascular smooth muscle.
Effects of pioglitazone on calcium channels in vascular smooth muscle.
复制标题
吡格列酮对血管平滑肌钙通道的影响。
DOI:
10.1161/01.hyp.24.2.170
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发表时间:
1994
期刊:
影响因子:
--
通讯作者:
Peuler,JD
中科院分区:
文献类型:
--
作者:
Zhang,F;Sowers,JR;Ram,JL;Standley,PR;Peuler,JD
Pioglitazone, an insulin-sensitizing, antidiabetic agent, has blood pressure-lowering effects in insulin-resistant hypertensive rats and attenuates growth factor-induced increases of intracellular Ca2+ in rat aortic vascular smooth muscle cells. To determine whether modulation of voltage-dependent Ca2+ channels plays a role in this association, we investigated the effects of pioglitazone on voltage-dependent current in cultured rat aortic (a7r5) and freshly dissociated rat tail artery vascular smooth muscle cells. Both cell types were studied with whole-cell patch-clamp techniques. Current through L-type Ca2+ channels was elicited with a voltage ramp in the presence of Ba2+ substituted for Ca2+. T-type Ca2+ current was studied using a two-pulse protocol that enabled the isolation of transient current. In a7r5 vascular smooth muscle cells, 2-minute application of pioglitazone (5 and 10 mumol/L) reduced L-type current by 7.9 +/- 1.0% (n = 8) (mean +/- SEM, number of cells) and 14.5 +/- 3.0% (n = 9) (P < .01, two-tailed paired t test), respectively. In contrast, 2-minute application of pioglitazone had no significant effect on T-type Ca2+ current. In freshly dissociated tail artery vascular smooth muscle cells, 2-minute application of 10 mumol/L pioglitazone had an insignificant effect (4.8 +/- 5.6% reduction); however, 25 mumol/L pioglitazone reduced L-type current by 27.3 +/- 7.2% (n = 5) (P < .01). Two-minute application of 0.1% or 0.2% dimethyl sulfoxide (vehicle) alone had no significant effects on currents in either type of vascular smooth muscle cell.(ABSTRACT TRUNCATED AT 250 WORDS)
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DOI:
10.1159/000158642
发表时间:
1986
期刊:
Blood vessels
影响因子:
--
作者:
R. M. Lee;C. Triggle
通讯作者:
C. Triggle
影响因子:
3.2
作者:
P. Standley;K. Rose
通讯作者:
K. Rose
影响因子:
3
作者:
K. Hermsmeyer;M. Sturek;W. Marvin;R. Mason;A. Puga
通讯作者:
A. Puga
DOI:
10.1177/009127009203200607
发表时间:
1992-06
期刊:
The Journal of Clinical Pharmacology
影响因子:
--
作者:
J. Sowers
通讯作者:
J. Sowers
影响因子:
15.9
作者:
DRAZNIN, B;SUSSMAN, KE;SHERMAN, NA
通讯作者:
SHERMAN, NA