RT Journal Article SR Electronic T1 Absorption, Distribution, Metabolism, and Excretion of 2,2-Bis(bromomethyl)-1,3-propanediol in Male Fischer-344 Rats JF Drug Metabolism and Disposition JO Drug Metab Dispos FD American Society for Pharmacology and Experimental Therapeutics SP 408 OP 416 DO 10.1124/dmd.108.023937 VO 37 IS 2 A1 Simone I. Hoehle A1 Gabriel A. Knudsen A1 J. Michael Sanders A1 I. Glenn Sipes YR 2009 UL http://dmd.aspetjournals.org/content/37/2/408.abstract AB 2,2-Bis(bromomethyl)-1,3-propanediol (BMP) is a brominated flame retardant, previously shown to be a multisite carcinogen in experimental animals. Studies were performed to characterize the dispositional and metabolic fate of BMP after oral or intravenous administration to male Fischer-344 rats. After a single oral administration of [14C]BMP (10 or 100 mg/kg) >80% of the low dose and 48% of the high dose were excreted by 12 h in the urine predominantly as a glucuronide metabolite. After repeated daily oral doses for 5 or 10 days, route and rate of elimination were similar to those obtained after single administrations of BMP. In all studies, the radioactivity recovered in feces was low (<15%). The total amount of radioactivity remaining in tissues at 72 h after a single oral administration of BMP (100 mg/kg) was less than 1% of the dose, and repeated daily dosing did not lead to retention in tissues. After intravenous administration, the radiolabel found in blood decreased rapidly. Excretion profiles were similar to those after oral administration. Parent BMP and BMP glucuronide were present in blood plasma after oral or intravenous dosing. After an intravenous dose of BMP (15 mg/kg) the hepatic BMP glucuronide was primarily exported into the bile (>50% within 6 h), but it underwent enterohepatic recycling with subsequent elimination in the urine. These data indicate that the extensive extraction and rapid glucuronidation by the liver limits exposure of internal tissues to BMP by greatly reducing its systemic bioavailability after oral exposure. U.S. Government work not protected by U.S. copyright.