Epidermal growth factor induces tyrosine hydroxylase in a clonal pheochromocytoma cell line, PC-G2.

Epidermal growth factor induces tyrosine hydroxylase in a clonal pheochromocytoma cell line, PC-G2. We have previously described the isolation of a clonal cell line (PC-G2) in which the level of tyrosine hydroxylase (TH), the rate-limiting step in the synthesis of the catecholamine neurotransmitters, is induced by nerve growth factor (NGF). We now report that epidermal growth factor (EGF) also induces TH in the PC-G2 cell line. Although EGF has been shown to be mitogenic for many cultured cells, no neuronal function has been previously reported for this protein. The TH response to EGF is elicited in a dose-dependent fashion at concentrations as low as 0.1 ng/ml and is maximal at 10 ng/ml EGF. The maximal response is observed after 3--4 d of exposure to 10 ng/ml EGF. The induction by NGF and EGF is inhibited by their respective antisera. Dexamethasone, a synthetic glucocorticoid which we have previously shown modulates the response of PC-G2 cells to NGF, also modulates the TH induction elicited by EGF. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png The Journal of Cell Biology Rockefeller University Press

Epidermal growth factor induces tyrosine hydroxylase in a clonal pheochromocytoma cell line, PC-G2.

The Journal of Cell Biology, Volume 84 (3): 495 – Mar 1, 1980

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Publisher
Rockefeller University Press
Copyright
© 1980 Rockefeller University Press
ISSN
0021-9525
eISSN
1540-8140
DOI
10.1083/jcb.84.3.495
Publisher site
See Article on Publisher Site

Abstract

We have previously described the isolation of a clonal cell line (PC-G2) in which the level of tyrosine hydroxylase (TH), the rate-limiting step in the synthesis of the catecholamine neurotransmitters, is induced by nerve growth factor (NGF). We now report that epidermal growth factor (EGF) also induces TH in the PC-G2 cell line. Although EGF has been shown to be mitogenic for many cultured cells, no neuronal function has been previously reported for this protein. The TH response to EGF is elicited in a dose-dependent fashion at concentrations as low as 0.1 ng/ml and is maximal at 10 ng/ml EGF. The maximal response is observed after 3--4 d of exposure to 10 ng/ml EGF. The induction by NGF and EGF is inhibited by their respective antisera. Dexamethasone, a synthetic glucocorticoid which we have previously shown modulates the response of PC-G2 cells to NGF, also modulates the TH induction elicited by EGF.

Journal

The Journal of Cell BiologyRockefeller University Press

Published: Mar 1, 1980

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