Connexin45 gap junction channels in rat cerebral vascular smooth muscle cells.
Connexin45 gap junction channels in rat cerebral vascular smooth muscle cells.
复制标题
大鼠脑血管平滑肌细胞中的Connexin45间隙连接通道。
DOI:
10.1152/ajpheart.2001.281.5.h1890
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发表时间:
2001
期刊:
影响因子:
--
通讯作者:
Simard,JM
中科院分区:
文献类型:
--
作者:
Li,X;Simard,JM
Cells in blood vessel walls express connexin (Cx)43, Cx40, and Cx37. We recently characterized gap junction channels in rat basilar artery smooth muscle cells and found features attributable not only to these three connexins but also to an unidentified connexin, including strong voltage dependence and single channel conductance of 30–40 pS. Here, we report data consistent with identification of Cx45. Immunofluorescence using anti-human Cx45 and anti-mouse Cx45 antibodies revealed labeling between α-actin-positive cells, and RT-PCR of mRNA from arteries after endothelial destruction yielded amplicons exhibiting 90–98% identity with mouse Cx45 and human Cx45. Dual-perforated patch clamping was performed after exposure to oligopeptides that interfere with docking of Cx43, Cx40, or Cx45. Cell pairs pretreated with blocking peptides for Cx43 and Cx40 exhibited strongly voltage-dependent transjunctional conductances [voltage at which voltage-dependent conductance declines by one-half (V1/2) = ±18.9 mV] and small single channel conductances (31 pS), consistent with the presence of Cx45, whereas cell pairs pretreated with blocking peptide for Cx45 exhibit weaker voltage-dependent conductances (V1/2= ±37.9 mV), consistent with block of Cx45. Our data suggest that Cx45 is transcribed, expressed, and forms functional gap junction channels in rat cerebral arterial smooth muscle.
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影响因子:
20.1
作者:
S. Coppen;E. Dupont;S. Rothery;N. Severs
通讯作者:
N. Severs
DOI:
10.1152/ajpheart.1995.268.2.h729
发表时间:
1995-02-01
影响因子:
4.8
作者:
LITTLE, TL;BEYER, EC;DULING, BR
通讯作者:
DULING, BR
DOI:
10.1152/ajpheart.1989.256.3.h838
发表时间:
1989-03
期刊:
The American journal of physiology
影响因子:
--
作者:
S. Segal;B. Duling
通讯作者:
S. Segal;B. Duling
影响因子:
3.3
作者:
Lecanda, F;Towler, DA;Civitelli, R
通讯作者:
Civitelli, R
DOI:
10.1007/bf00232672
发表时间:
1994
期刊:
The Journal of membrane biology
影响因子:
--
作者:
Laing,JG;Westphale,EM;Engelmann,GL;Beyer,EC
通讯作者:
Beyer,EC