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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Retinoic acid increases hydroxyindole-O-methyltransferase activity and mRNA in human Y-79 retinoblastoma cells.

Hydroxyindole-O-methyltransferase (HIOMT) plays an important role as the final enzyme in the synthesis of melatonin. Here we present the first evidence that retinoic acid (RA) stereoisomers are potent regulators of HIOMT in the human retinoblastoma-derived Y-79 cell line. Treatment with all-trans-, 13-cis-, and 9-cis-RA induced a gradual 10-fold increase in HIOMT activity and mRNA, without changing the levels of mRNA encoding glyceraldehyde-3-phosphate dehydrogenase, actin, S-antigen, and interphotoreceptor retinoid-binding protein. These findings point to the possibility that RA may play a physiological role in the regulation of human HIOMT.[1]


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