PMID: 6984193Dec 1, 1982Paper

Serum and epidermal growth factor transiently depolarize quiescent BSC-1 epithelial cells

Proceedings of the National Academy of Sciences of the United States of America
P RothenbergL Glaser

Abstract

Continuous intracellular recording of membrane potential with microelectrodes in BSC-1 epithelial cells has been used to study the early ionic effects of the interaction of mitogens with cell surface receptors. Initial results show that (i) there is no significant difference in membrane potential between growing and quiescent cells, (ii) addition of epidermal growth factor or serum to quiescent BSC-1 cells induces a brief and transient depolarization, (iii) the mitogenic response of BSC-1 cells to epidermal growth factor and the transient depolarization show similar concentration dependences, and (iv) serum addition to quiescent BSC-1 cells induces a sustained increase in Na+ influx that is electroneutral and amiloride sensitive. Intracellular pH changes may be a primary event triggering the response of quiescent cells to mitogenic polypeptides.

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