Microarray analysis of mitogenic effects of T3 on the rat liver

Journal of Gastroenterology and Hepatology
Anton BungayHumphrey Hodgson

Abstract

A single dose of the thyroid hormone tri-iodothyronine, T3, can enhance both size and function of normal rodent liver, which is potentially of value in the treatment of liver disease. However the mechanism of this has not been fully elucidated, and it cannot be modeled in vitro. We therefore investigated the transcriptome response to T3 in rat liver in vivo. After adult rats were administered 5 microg T3 subcutaneously, a whole rat genome microarray comparing global hepatic gene expression against vehicle-only treated liver after 3 h was performed. Informative transcripts which had identifiable gene ontology biological processes were grouped according to function, broadly reflecting general metabolic effects and those linked to cell-proliferation control. We then compared the transcriptome response after 5-microg T3 initiating hepatocyte DNA synthesis (mitogenic) with that after 0.1 microg T3, a supraphysiological amount not initiating hepatocyte DNA synthesis. We compared the results with published results of the response to other primary mitogens, and identified the Gadd45beta/MyD118 gene as a common early factor upregulated during proliferation.

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Citations

May 14, 2011·Journal of Proteome Research·Valeria SeverinoAngela Chambery
Jun 15, 2011·Molecular and Cellular Endocrinology·Joachim M Weitzel, K Alexander Iwen
Sep 1, 2009·Trends in Endocrinology and Metabolism : TEM·Ana ArandaAlberto Zambrano
May 26, 2015·Expert Reviews in Molecular Medicine·Luis A VidelaIván Castillo
Oct 6, 2015·PloS One·Rolando A RebolledoPamela Romanque
Oct 2, 2019·Thyroid : Official Journal of the American Thyroid Association·Maik PietznerGeorg Homuth

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