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. 1977 Jun;74(6):2384–2388. doi: 10.1073/pnas.74.6.2384

Regulation by estrogen of the vitellogenin gene.

J K Skipper, T H Hamilton
PMCID: PMC432176  PMID: 267932

Abstract

The vitellogenin gene is inactive in the liver of male Xenopus laevis, unless exogenous estrogen is administered. We have previously shown that conventional doses of estradiol-17beta result in the appearance of new hepatic messenger RNAs, some of which are encoded for vitellogenin. We now report that much higher doses of the hormone (2 mg/frog per day for 4 days) are required to elicit maximal responses. The relative levels of membrane-bound polysomes and vitellogenin mRNA were determined as a function of time and dose of hormone. Translation of total polysomal RNA in a cell-free system derived from wheat germ was used to estimate the relative levels of vitellogenin messenger RNA. Faithful translation of this messenger RNA was indicated by two lines of evidence: labeled cell-free products were immunoprecipitated with antivitellogenin antibody, and the migration of the major labeled product in sodium dodecyl sulfate/acrylamide gels was identical to that of native vitellogenin. Our results establish conditions for maximal estrogen-induced responses in this system, and are compatible with the hypothesis that a major regulatory mechanism of steroid hormones in the control of protein synthesis is that of gene activation and regulation of messenger RNA levels.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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