Moreno A P, de Carvalho A C, Verselis V, Eghbali B, Spray D C
Department of Neuroscience, Albert Einstein College of Medicine, Bronx, New York 10461.
Biophys J. 1991 Apr;59(4):920-5. doi: 10.1016/S0006-3495(91)82305-0.
We report here experiments undertaken in pairs of hepatocytes that demonstrate a marked voltage sensivity of junctional conductance and, thus, contradict earlier findings reported by this laboratory (Spray, D.C., R.D.ginzberg, E.A., E. A. Morales, Z. Gatmaitan and I.M. Arias, 1986, J. Cell Biol. 101:135-144; Spray C.D. R.L. White, A.C. Campos de Carvalho, and M.V.L. Bennett. 1984. Biophys. J. 45:219-230) and by others (Dahl, G., T. Moller, D. Paul, R. Voellmy, and R. Werner. 1987. Science [Wash. DC] 236:1290-1293; Riverdin, E.C., and R. Weingart. 1988. Am. J. Physiol. 254:C226-C234). Expression in exogenous systems, lipid bilayers in which fragments of isolated gap junction membranes were incorporated (Young, J.D.-E., Z. Cohn, and N.B. Gilula. 1987. Cell. 48:733-743.) and noncommunicating cells transfected with connexin32 cDNA (Eghbali, B., J.A. Kessler, and D.C. Spray. 1990. Proc. Natl. Acad. Sci. USA. 87:1328-1331), support these findings and indicate that the voltage-dependent channel is composed of connexin32, the major gap junction protein of rat liver (Paul, D. 1986. J. Cell Biol. 103:123-134).
我们在此报告在成对肝细胞中进行的实验,这些实验证明了连接电导具有显著的电压敏感性,因此与本实验室早期的研究结果相矛盾(斯普雷,D.C.,R.D.金兹伯格,E.A.,E.A.莫拉莱斯,Z.加特马坦和I.M.阿里亚斯,1986年,《细胞生物学杂志》101:135 - 144;斯普雷,C.D.,R.L.怀特,A.C.坎波斯·德·卡瓦略和M.V.L.贝内特,1984年,《生物物理学杂志》45:219 - 230)以及其他研究人员的结果(达尔,G.,T.莫勒,D.保罗,R.福尔米和R.维尔纳,1987年,《科学》[华盛顿特区]236:1290 - 1293;里弗丁,E.C.和R.魏因加特,1988年,《美国生理学杂志》254:C226 - C234)。在外源系统中的表达,即掺入分离的缝隙连接膜片段的脂质双层(杨,J.D.-E.,Z.科恩和N.B.吉卢拉,1987年,《细胞》48:733 - 743)以及用连接蛋白32 cDNA转染的非通讯细胞(埃格巴利,B.,J.A.凯斯勒和D.C.斯普雷,1990年,《美国国家科学院院刊》87:1328 - 1331),支持了这些发现,并表明电压依赖性通道由连接蛋白32组成,连接蛋白32是大鼠肝脏主要的缝隙连接蛋白(保罗,D.,1986年,《细胞生物学杂志》103:123 - 134)。