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Decreased levels of nerve growth factor receptor on dexamethasone-treated PC12 cells

✍ Scribed by Dr. Maria D. Tocco; M. L. Contreras; S. Koizumi; G. Dickens; G. Guroff

Publisher: John Wiley and Sons
Year: 1988
Tongue: English
Weight: 830 KB
Volume: 20
Category: Article
ISSN: 0360-4012
DOI: 10.1002/jnr.490200403

No coin nor oath required. For personal study only.

✦ Synopsis

Treatment of PC12 cells with dexamethasone leads, in a period of days, to a 60% decrease in the binding of (125I)nerve growth factor. The decrease was maximal after 3 days of treatment with 1 microM dexamethasone, but some decrease was seen after 6 hr and at concentrations as low as 10 nM. The effect was specific for the glucocorticosteroids. Scatchard plots confirmed the overall loss of nerve growth factor binding, and studies with trypsin digestion and Triton X-100 extraction indicated that the decrease in binding was largely due to a decrease in the number of low-affinity receptors. Nerve growth factor-induced changes, such as the induction of ornithine decarboxylase and the generation of neurites, were inhibited, but only minimally, in dexamethasone-treated cells.

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