Association between polymorphisms of the CYP11A1 gene and polycystic ovary syndrome in Chinese women...

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Association between polymorphisms of the CYP11A1 gene and polycystic ovary syndrome in Chinese women Cheng-wei Zhang; Xin-lin Zhang; Yan-jie Xia; Yun-xia Cao; Wen-jun Wang; Pei Xu; Ye-na Che; Xiao-ke Wu JANINE BAPTISTA COIMBRA

Transcript of Association between polymorphisms of the CYP11A1 gene and polycystic ovary syndrome in Chinese women...

Page 1: Association between polymorphisms of the CYP11A1 gene and polycystic ovary syndrome in Chinese women Cheng-wei Zhang; Xin-lin Zhang; Yan-jie Xia; Yun-xia.

Association between polymorphisms of the CYP11A1 gene

and polycystic ovary syndrome in Chinese women

Cheng-wei Zhang; Xin-lin Zhang; Yan-jie Xia; Yun-xia Cao; Wen-jun Wang; Pei Xu; Ye-na Che; Xiao-ke Wu

JANINE BAPTISTA COIMBRA

Page 2: Association between polymorphisms of the CYP11A1 gene and polycystic ovary syndrome in Chinese women Cheng-wei Zhang; Xin-lin Zhang; Yan-jie Xia; Yun-xia.

Prevalência 6-10%;

7,4 % das chinesas em idade fértil.

Síndrome do ovário policístico

Endocrinopatia mais comum nas mulheres em idade fértil.

Page 3: Association between polymorphisms of the CYP11A1 gene and polycystic ovary syndrome in Chinese women Cheng-wei Zhang; Xin-lin Zhang; Yan-jie Xia; Yun-xia.

Síndrome do ovário policístico

Hirsutismo

Hiperandrogenismo

ObesidadeAmenorréi

a

Oligo-anovulação

Hiperinsulinemia

Page 4: Association between polymorphisms of the CYP11A1 gene and polycystic ovary syndrome in Chinese women Cheng-wei Zhang; Xin-lin Zhang; Yan-jie Xia; Yun-xia.

Hiperandrogenismo

CYP11A1; CYP17; CYP19; AR etc...

Quais os genes que podem afetar a síntese, ação e regulação de

andrógenos?

Page 5: Association between polymorphisms of the CYP11A1 gene and polycystic ovary syndrome in Chinese women Cheng-wei Zhang; Xin-lin Zhang; Yan-jie Xia; Yun-xia.

Codifica a enzima de clivagem (P450scc) que catalisa o primeiro passo da biossíntese de andrógeno e estrogênio e converte o colesterol em pregnenolona,um precursor andrógeno.

Hiperandrogenismo e gene CYP11A1

Page 6: Association between polymorphisms of the CYP11A1 gene and polycystic ovary syndrome in Chinese women Cheng-wei Zhang; Xin-lin Zhang; Yan-jie Xia; Yun-xia.
Page 7: Association between polymorphisms of the CYP11A1 gene and polycystic ovary syndrome in Chinese women Cheng-wei Zhang; Xin-lin Zhang; Yan-jie Xia; Yun-xia.

Gene CYP11A1

Localização: 15q24;

9 exons, 8 introns.

Page 8: Association between polymorphisms of the CYP11A1 gene and polycystic ovary syndrome in Chinese women Cheng-wei Zhang; Xin-lin Zhang; Yan-jie Xia; Yun-xia.

SNP’s:

rs4077582: C> T

rs11632698: A>G

Gene CYP11A1

Os SNP’s estão relacionados com a PCOS em mulheres

chinesas???

Page 9: Association between polymorphisms of the CYP11A1 gene and polycystic ovary syndrome in Chinese women Cheng-wei Zhang; Xin-lin Zhang; Yan-jie Xia; Yun-xia.

Estudos de associaçãoEstudo caso x controle

Casos X Controles Mulheres com PCOS (314+ 290=604) Mulheres normais (314+344=658)

Page 10: Association between polymorphisms of the CYP11A1 gene and polycystic ovary syndrome in Chinese women Cheng-wei Zhang; Xin-lin Zhang; Yan-jie Xia; Yun-xia.

Diagnóstico de PCOS

- Sinais clínicos e/ou bioquímicos de hiperandrogenismo;

- Oligomenorréia;- Ovário policístico: ultrasson

Avaliação hormonal

Page 11: Association between polymorphisms of the CYP11A1 gene and polycystic ovary syndrome in Chinese women Cheng-wei Zhang; Xin-lin Zhang; Yan-jie Xia; Yun-xia.

Genotipagem• PCR;

• Digestão com as enzima de restrição

Mly I (N= A ou C/ G ou T)

Ban II (R= A ou G e Y= C ou T)

• Eletroforese Identificação dos genótipos.

Page 12: Association between polymorphisms of the CYP11A1 gene and polycystic ovary syndrome in Chinese women Cheng-wei Zhang; Xin-lin Zhang; Yan-jie Xia; Yun-xia.

rs11632698: A>G rs4077582: C> T

Page 13: Association between polymorphisms of the CYP11A1 gene and polycystic ovary syndrome in Chinese women Cheng-wei Zhang; Xin-lin Zhang; Yan-jie Xia; Yun-xia.

Apenas o SNP rs4077582 está associado a PCOS

Page 14: Association between polymorphisms of the CYP11A1 gene and polycystic ovary syndrome in Chinese women Cheng-wei Zhang; Xin-lin Zhang; Yan-jie Xia; Yun-xia.

Genótipos e parâmetros hormonais

Page 15: Association between polymorphisms of the CYP11A1 gene and polycystic ovary syndrome in Chinese women Cheng-wei Zhang; Xin-lin Zhang; Yan-jie Xia; Yun-xia.

Na população controle CT: LH, LH/FSH e testosterona mais elevados;

LH: estimula produção de andrógenos.

Mulheres normais com genótipo de CT: mais propensas a desenvolver PCOS;

Mulheres com PCOS: maior parcela de com o genótipo CT, em comparação com os controles.

Page 16: Association between polymorphisms of the CYP11A1 gene and polycystic ovary syndrome in Chinese women Cheng-wei Zhang; Xin-lin Zhang; Yan-jie Xia; Yun-xia.

Polimorfismo de microssatélites (TTTTA) n x PCOS e nível de testosterona.

Mulheres espanholas, nenhuma associação com hirsutismo ou hiperandrogenismo.

Chinesas: nenhuma conclusão coerente.

Outros polimorfismos...

Page 17: Association between polymorphisms of the CYP11A1 gene and polycystic ovary syndrome in Chinese women Cheng-wei Zhang; Xin-lin Zhang; Yan-jie Xia; Yun-xia.

• rs4077582 fortemente associado com a susceptibilidade à PCOS;

• Mais pesquisas sobre a predisposição a PCOS e a função do gene CYP11A1 são necessárias.

Conclusão