Repositório Digital

A- A A+

Mecanismos moleculares no hirsutismo : expressão gênica de enzimas do metabolismo androgênico no folículo piloso e associação com o diagnóstico etiológico

.

Mecanismos moleculares no hirsutismo : expressão gênica de enzimas do metabolismo androgênico no folículo piloso e associação com o diagnóstico etiológico

Mostrar registro completo

Estatísticas

Título Mecanismos moleculares no hirsutismo : expressão gênica de enzimas do metabolismo androgênico no folículo piloso e associação com o diagnóstico etiológico
Outro título Molecular mechanisms on hirsutism : gene expression of androgen metabolizing enzymes in scalp hair and association with etiological diagnosis
Autor Oliveira, Isabel Oliveira de
D'Avila, Ângela Marcon
Brum, Ilma Simoni
Spritzer, Poli Mara
Resumo Androgens 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.
Contido em Revista HCPA. Porto Alegre. Vol. 23, n. 1-2 (mar./jun. 2003), p. 37-42
Assunto Folículo piloso : Anormalidades
Folículo piloso : Crescimento & desenvolvimento
Receptores androgênicos
Síndrome do ovário policístico
[en] 17b hydroxysteroid dehydrogenase
[en] 5areductase
[en] Androgen receptors
[en] Hair follicle
[en] Hirsutism
[en] Polycystic ovary syndrome
Origem Nacional
Tipo Artigo de periódico
URI http://hdl.handle.net/10183/164253
Arquivos Descrição Formato
000429861.pdf (651.4Kb) Texto completo Adobe PDF Visualizar/abrir

Este item está licenciado na Creative Commons License

Este item aparece na(s) seguinte(s) coleção(ões)


Mostrar registro completo

Percorrer



  • O autor é titular dos direitos autorais dos documentos disponíveis neste repositório e é vedada, nos termos da lei, a comercialização de qualquer espécie sem sua autorização prévia.
    Projeto gráfico elaborado pelo Caixola - Clube de Criação Fabico/UFRGS Powered by DSpace software, Version 1.8.1.