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Intercellular communication between mouse Leydig cells

mouse Leydig DE CARVALHO Universidade de SGo Paula, Federal University of Rio de WAMBERTO A. VARANDA AND ANTONIO CARLOS CAMPOS Department of Physiology, Faculty of Medicine of Ribeirtio Preto, 14049-900 Ribeirao Preto-S6o Pa&o; and Institute of Biophysics, Janeiro, 21949-900 Rio de Janeiro, Brazil Varanda, Wamberto A., and Antonio Carlos Campos de Carvalho. Intercellular communication between mouse Leydig . Am. J. PhysioZ. 267 (Cell Physiol. 36): C563C569, 1994.-In this paper we describe the basic features of in pairs of Leydig mechanically dissociated from mouse testes, studied with the double whole cell patchclamp technique. These are extensively coupled with regard to dye injection and electrophysiological measurements. The mean junctional conductance (gj) measured in 61 pairs of was 10.6 * 1.5 (SE) nS. In most pairs gj was voltage dependent when transjunctional voltage exceeded t50 mV. On imposition of a voltage gradient across the junction the transjunctional current decayed exponentially to a lower level, with a time constant of 3.3 s at 50 mV and 430 ms at 100 mV. As in other systems, octanol(600 FM final concentration) uncoupled the within N 2 min. In a few cell pairs, gj was low enough to permit recording of single channel currents without http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png AJP - Cell Physiology The American Physiological Society

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