PMID: 415733Dec 15, 1977

Regulation of onset of development of UDP-glucuronosyltransferase activity towards o-aminophenol by glucocorticoids in late-foetal rat liver in utero

The Biochemical Journal
G J Wishart, G J Dutton


1. A precocious development of UDP-glucuronosyltransferase activity (EC towards o-aminophenol is demonstrated in 15-17 day foetal rat liver in utero after dexamethasone administration to the mother. 2. This stimulation of liver transferase activity in utero is directly proportional to the dose of dexamethasone infected. 3. Precocious development of transferase activity in utero can also be effected with the natural glucocorticoid cortisol by multiple injections of large amounts of this hormone into the mother. 4. Transferase activity towards o-aminophenolin foetal lung, kidney and upper alimentary tract can also be precociously stimulated by dexamethasone in 17-day foetuses in utero. 5. Natural development of hepatic transferase activity between days 18 and 20 of gestation is retarded after foetal hypophysectomy by decapitation in utero. 6. Overall glucuronidation of o-aminophenol, as observed in foetal rat liver, is also precociously stimulated by dexamethasone. 7. From this and from evidence previously presented we suggest that glucocorticoids, which are known to increase in rat foetuses between days 17 and 20 of gestation, trigger the normal development in utero of hepatic transferase activity towards o-aminophenol...Continue Reading


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