Ion dependence of resting membrane potential of rat spermatids

J. G. Reyes, J. Bacigalupo, R. Araya, D. J. Benos

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The membrane potential of rat spermatids was estimated as -22 ± 2 mV (mean ± SEM) using three independent methods: using oxonol as a fluorescent membrane potential sensitive probe, from the passive distribution of hydrogen ions and from whole-cell patch-clamp records. The estimated permeability ratios P(K)+ P(Cl)- and P(Na)+ P(Cl)- of the plasma membrane of rat spermatids were 1.0 and 0.3, respectively. These data indicate that the high luminal K+ concentration found in seminiferous tubules could partially close voltage-sensitive calcium channels in these cells.

Original languageEnglish
Pages (from-to)313-319
Number of pages7
JournalJournal of Reproduction and Fertility
Issue number2
StatePublished - 1994


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