PMID: 8597599Mar 1, 1996Paper

Heterogeneity of rat type I 5 alpha-reductase cDNA: cloning, expression and regulation by pituitary implants and dihydrotestosterone

Biochimica Et Biophysica Acta
I Lopez-SolacheF Labrie

Abstract

Primer extension analysis reveals the presence of different forms of mRNA species for rat type I 5 alpha-reductase. Using a 5 alpha-reductase cDNA probe to screen the rat liver lambda gt11 cDNA library, we isolated cDNA clones that have 4 additional amino acids in the NH2-terminal region as compared with the previously reported sequence for rat type I 5 alpha-reductase. These four additional amino acids elongate the rat type I 5 alpha-reductase amino acid sequence to 259 amino acids, the same number as in human type I 5 alpha-reductase, with which it shares 60% identity. Expression of the long and short rat type I 5 alpha-reductase by transfection in human adrenal adenocarcinoma cells, SW-13 cells, indicated that the long cDNA encoded a protein with a higher affinity for the substrate than the short cDNA. To determine the effect of pituitary hormones and dihydrotestosterone (DHT), the mRNA levels in the livers of rats treated with pituitary implants, hypophysectomized, castrated, and castrated coupled with DHT treatment were quantified by dot-blot hybridization assay using rat type I 5 alpha-reductase cDNA as probes. The results demonstrated that rat type I 5 alpha-reductase mRNA is stimulated by pituitary hormones and castrati...Continue Reading

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Citations

Jan 13, 1998·Hepatology : Official Journal of the American Association for the Study of Liver Diseases·E MezeyJ J Potter
Feb 6, 2004·Pharmacology & Therapeutics·Deborah A FinnJohn C Crabbe
Jan 1, 1997·Brain Research Bulletin·F CelottiA Poletti
Sep 10, 2011·The Journal of Endocrinology·Mark NixonRuth Andrew
Feb 28, 2003·Biology of Reproduction·Jessica KillianLiza O'Donnell
Nov 5, 1998·Neurosurgery·M MaxwellP M Black
Sep 29, 1999·Biochimica Et Biophysica Acta·P RheaultV Luu-The
Dec 30, 2006·Molecular and Cellular Endocrinology·Yannick BlanchardBernard Robaire

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