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Impacto das modificações epigenéticas e do álcool em diferentes áreas do cérebro

Impacto das modificações epigenéticas e do álcool em diferentes áreas do cérebro

Manish Kumar / Prabha Rajput

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Editorial:
KS OmniScriptum Publishing
Año de edición:
2024
Materia
Farmacología
ISBN:
9786208135089
58,03 €
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Hipometilação global do ADN resultante de uma redução dos níveis de SAM (S-adenosil metionina). Os níveis de SAM são reduzidos em resultado de uma redução do folato induzida pelo álcool e da inibição da metionina sintetase. Ao mesmo tempo, os níveis de SAH aumentam, o que inibe a DNMT. Modificação da histona que está associada a um aumento dos níveis de NADH causado pelo metabolismo do álcool. O aumento do NADH afecta a atividade da SIRT1, levando à expressão ou silenciamento dos genes. Produção de ROS, que afecta a expressão de genes inflamatórios, e de acetato, que é utilizado nos tecidos extra-hepáticos para produzir acetil-CoA. Este último é depois utilizado na acetilação das histonas pelas HATs. Estas alterações epigenéticas resultantes do consumo crónico de álcool podem levar à patologia dos órgãos. A compreensão da natureza exacta das alterações epigenéticas ajudará a conceber medicamentos para o tratamento ou a atenuação das lesões dos órgãos induzidas pelo álcool.

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