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dc.contributor.authorOliveira, Isabel Oliveira dept_BR
dc.contributor.authorD'Avila, Ângela Marconpt_BR
dc.contributor.authorBrum, Ilma Simonipt_BR
dc.contributor.authorSpritzer, Poli Marapt_BR
dc.date.accessioned2017-07-22T02:39:17Zpt_BR
dc.date.issued2003pt_BR
dc.identifier.issn0101-5575pt_BR
dc.identifier.urihttp://hdl.handle.net/10183/164253pt_BR
dc.description.abstractAndrogens are the main hormonal regulators of human hair growth and they are related to clinical conditions such as hirsutism. The aim of this study was to analyze the gene expression of androgen receptor (AR), type 1 and type 2 5a-reductase isoenzymes (5a R1 and 2) and type 2 17b hydroxysteroid dehydrogenase (17b-HSD 2) in plucked scalp hairs from hirsute patients and normal subjects. We studied 33 women with hirsutism [20 with polycystic ovary syndrome (PCOS), 13 with idiopathic hirsutism (IH)]; 15 control women; and 10 control men. Hirsutism was assessed by a modified Ferriman-Gallwey method. Hormonal status was assessed between days 2 and 10 of the menstrual cycle or on any day when the patients were amenorrheic. AR and enzymes mRNA levels were estimated by reverse transcriptionpolymerase chain reaction (RT-PCR). AR expression was similar in all groups. The gene expression of 5a R2 was not detected in any hair samples analyzed in this study. No differences were found on 5a R1 mRNA levels between men and normal women (0.78 ± 0.05 vs. 0.74 ± 0.06, respectively). 5a R1 gene expression in the plucked hair cells from scalp of normal women (0.85 ± 0.04), PCOS (0.78 ± 0.05) and IH (0.80 ± 0.06) was also similar. 17b-HSD2 gene expression in hirsute patients was lower (2.2±0.13 and 2.0±0.15, for PCOS and IH, respectively) than in normal women (3.1±0.17, p<0.05), and similar to men (1.8±0.22). In conclusion, these results indicate that there are no changes on 5a R1 gene expression in the plucked hair cells from scalp, related to gender or hirsutism. The lower expression of 17b-HSD2 mRNA in scalp hairs of hirsute patients suggests androgen metabolism disturbances with predominance of more potent androgens, as occurs in men.pt_BR
dc.format.mimetypeapplication/pdfpt_BR
dc.language.isoporpt_BR
dc.relation.ispartofRevista HCPA. Porto Alegre. Vol. 23, n. 1-2 (mar./jun. 2003), p. 37-42.pt_BR
dc.rightsOpen Accessen
dc.subjectAndrogen receptorsen
dc.subjectFolículo pilosopt_BR
dc.subjectHair follicleen
dc.subjectSíndrome do ovário policísticopt_BR
dc.subjectHirsutismen
dc.subjectReceptores androgênicospt_BR
dc.subject17b hydroxysteroid dehydrogenaseen
dc.subject5areductaseen
dc.subjectPolycystic ovary syndromeen
dc.titleMecanismos moleculares no hirsutismo : expressão gênica de enzimas do metabolismo androgênico no folículo piloso e associação com o diagnóstico etiológicopt_BR
dc.title.alternativeMolecular mechanisms on hirsutism : gene expression of androgen metabolizing enzymes in scalp hair and association with etiological diagnosisen
dc.typeArtigo de periódicopt_BR
dc.identifier.nrb000429861pt_BR
dc.type.originNacionalpt_BR


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