[3H]nimodipine specific binding to cardiac myocytes and subcellular fractions.

[3H]nimodipine specific binding to cardiac myocytes and subcellular fractions.
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[3H]尼莫地平与心肌细胞和亚细胞部分特异性结合。

DOI:
10.1016/0006-291x(83)90449-7
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发表时间:
1983
影响因子:
3.1
通讯作者:
Schwartz,A
Schwartz,A
中科院分区:
生物学4区
文献类型:
--
作者:
DePover,A;Lee,SW;Matlib,MA;Whitmer,K;Davis,BA;Powell,T;Schwartz,A

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[3H]研究了尼莫地平在大鼠心脏离体肌细胞和犬心脏部分纯化的肌膜、肌浆网和线粒体的结合。在离体肌细胞中,[3H]尼莫地平特异位点密度(106个/细胞)接近[3H]QNB特异位点密度(0.8 × 106个/细胞),高于[3H]DHA特异位点密度(0.2 × 106个/细胞)。在亚细胞分离过程中,[3H]尼莫地平结合不与质膜标记物共硫化。在肌膜或肌浆网富集的部分密度最高。在线粒体中未发现特异性结合。这些结果表明,[3H]尼莫地平位点的定位并不局限于富含β-肾上腺素受体、毒蕈碱受体和钠泵位点的质膜区域。
[3H]Nimodipine binding was studied in isolated myocytes from rat heart and in partially purified sarcolemma, sarcoplasmic reticulum and mitochondrial fractions from dog heart. In isolated myocytes, the density of [3H]nimodipine specific sites (106per cell) was close to the density of [3H]QNB sites (0.8 × 106per cell) and higher than that of [3H]DHA sites (0.2 × 106per cell). During subcellular fractionation, [3H]nimodipine binding did not copurify with plasma membrane markers. The highest densities were found in fractions enriched in sarcolemma or in sarcoplasmic reticulum. No specific binding was found in mitochondria. These results indicate that the localization of [3H]nimodipine sites is not restricted to areas of the plasma membrane rich in β-adrenoceptors, muscarinic receptors and sodium pump sites.
DOI: 10.1017/cbo9780511665684.006
发表时间: 1990
期刊: EXCLI Journal
影响因子: 4.6
作者:
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DOI: --
发表时间: 1983
期刊:
影响因子: --
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发表时间: 1986-03-01
影响因子: 4
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