Liver cell proliferation requires methionine adenosyltransferase 2A mRNA up-regulation
نویسندگان
چکیده
منابع مشابه
The role of c-Myb in the up-regulation of methionine adenosyltransferase 2A expression in activated Jurkat cells.
Methionine adenosyltransferase (MAT) is a critical cellular enzyme which catalyses the formation of S-adenosylmethionine (SAM), the principal methyl donor. In mammals, two different genes, MAT1A and MAT2A, encode liver-specific and non-liver-specific MATs, respectively. SAM level increases during T-lymphocyte activation and is required for proliferation. A major mechanism for the increase in SA...
متن کاملRole of promoter methylation in increased methionine adenosyltransferase 2A expression in human liver cancer.
Methionine adenosyltransferase (MAT), an essential enzyme that catalyzes the formation of S-adenosylmethionine (SAM), is encoded by two genes, MAT1A (liver-specific) and MAT2A (non-liver-specific). We showed a switch from MAT1A to MAT2A expression in human liver cancer, which facilitates cancer cell growth. The present work examined the role of methylation in MAT2A transcriptional regulation. W...
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Liver methionine adenosyltransferase (MAT) plays a critical role in the metabolism of methionine converting this amino acid, in the presence of ATP, into S-adenosylmethionine. Here we report that hydrogen peroxide (H2O2), via generation of hydroxyl radical, inactivates liver MAT by reversibly and covalently oxidizing an enzyme site. In vitro studies using pure liver recombinant enzyme and mutan...
متن کاملChanges in methionine adenosyltransferase during liver regeneration in the rat.
Liver-specific and non-liver-specific methionine adenosyltransferase (MAT) are products of two genes (MAT1A and MAT2A, respectively) that catalyze the formation of S-adenosylmethionine (SAM), the principal methyl donor. We previously showed that MAT2A expression was associated with more rapid cell growth. Here we examined changes in hepatic MAT gene expression and related consequences after two...
متن کاملImpaired liver regeneration in mice lacking methionine adenosyltransferase 1A.
Methionine adenosyltransferase (MAT) is an essential enzyme because it catalyzes the formation of S-adenosylmethionine (SAMe), the principal biological methyl donor. Of the two genes that encode MAT, MAT1A is mainly expressed in adult liver and MAT2A is expressed in all extrahepatic tissues. Mice lacking MAT1A have reduced hepatic SAMe content and spontaneously develop hepatocellular carcinoma....
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ژورنال
عنوان ژورنال: Hepatology
سال: 2002
ISSN: 0270-9139
DOI: 10.1053/jhep.2002.32538