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Investigação do perfil de metilação de genes candidatos a biomarcadores na endometriose

Authors: Zimbardi, Daniela;

Investigação do perfil de metilação de genes candidatos a biomarcadores na endometriose

Abstract

The endometriosis is a multi-factorial and chronic disease affecting 5% to 10% of women in reproductive age characterized by endometrium-like tissue (gland and stromma) outside uterine cavity. Although its etiology is poorly understood, recent evidences have indicated that epigenetic alterations are implicated in the pathophysiology. This hypothesis has been supported by findings surrounding altered DNA methylation pattern of specific genes, as well as by altered levels of expression of epigenetic machinery components in endometriotic lesions compared to eutopic endometrium from the same patient or endometrium of women free of disease. Thus, a better understanding of the role of epigenetic mechanisms in the pathogenesis and progression of endometriosis has become necessary and may contribute to the identification of diagnostic markers and for designing new therapeutic approaches that could benefit and improve the quality of life of women with this condition. In this context, this study aimed to identify differentially methylated genes as candidate biomarkers in endometriosis. The results could be organized in two papers. The first study aimed to investigate the profile of differential DNA methylation in intestinal endometriosis compared to eutopic endometrium of paired samples from the same patient. For this, we carried out a large-scale approach based on microarray containing 27,800 CpG islands, resulting in the identification of 546 genes as hypermethylated and 871 genes as hipomethylated. In silico analysis for the functional classification of differentially methylated genes enabled us to identify sets of genes with functions of transcription factors, chromatin remodeling, besides other functional classes. After conducting a comparative assessment with data available in other large-scale studies of literature, it was possible to recognize recurrent alteratons evolving 227 hypermethylated and 322 hypomethylated ...

A endometriose é uma doença crônica multifatorial, inflamatória, estrógeno-dependente, que afeta entre 8 a 10% das mulheres em idade reprodutiva e caracterizada por tecido similar ao endométrio (glândula e estroma) fora da cavidade uterina. Embora a sua etiologia seja pouco conhecida, evidências recentes indicam que alterações epigenéticas estão envolvidas na sua patofisiologia. Esta hipótese é apoiada pelos achados envolvendo padrões alterados de metilação do DNA em genes específicos, bem como pelos níveis alterados de expressão de componentes da maquinaria epigenética nas lesões endometrióticas, quando comparadas ao endométrio eutópico da mesma paciente ou ao endométrio de mulheres que não apresentam a doença. Assim, um melhor entendimento do papel dos mecanismos epigenéticos na patogênese e progressão da endometriose tem se tornado necessário, podendo contribuir para a identificação de marcadores diagnósticos e para o delineamento de novas abordagens terapêuticas, que trariam benefícios e melhor qualidade de vida para as mulheres que apresentam esta condição. Neste contexto, este estudo buscou a identificação de genes diferencialmente metilados candidatos a biomarcadores na endometriose. Os resultados obtidos foram organizados em dois artigos científicos. O primeiro artigo teve como objetivo investigar o perfil diferencial de metilação do DNA na endometriose intestinal em comparação com amostras pareadas de endométrio eutópico da mesma paciente. Para isso, foi empregada uma abordagem em larga escala baseada em microarranjos contendo 27.800 ilhas CpG, que resultou na identificação de 546 genes hipermetilados e 871 genes hipometilados. A análise in silico para a classificação funcional dos genes diferencialmente metilados permitiu identificar conjuntos de genes com funções de fatores de transcrição, remodeladores da cromatina entre outras classes funcionais. Após a realização de uma ...

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Pós-graduação em Ciências Biológicas (Genética) - IBB

Country
Brazil
Keywords

Ilhas CpG, Endometriosis, Marcadores biologicos, Epigenetics, Epigenética, Expressão gênica, Endometriose, Análise de microarranjo

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
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