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Absorption, Distribution, Metabolism and Excretion of 3-MCPD 1-Monopalmitate after Oral Administration in Rats.

Fatty acid esters of monochloropropane 1,2-diol (3-MCPD) are processing-induced toxicants and have been detected in several food categories. This study investigated the absorption, distribution, metabolism, and excretion of 3-MCPD esters in Sprague-Dawley (SD) rats using 3-MCPD 1-monopalmitate as the probe compound. The kinetics of 3-MCPD 1-monopalmitate in plasma was investigated using SD rats, and the results indicated that 3-MCPD 1-monopalmitate was absorbed directly in vivo and metabolized. Its primary metabolites in the liver, kidney, testis, brain, plasma, and urine were tentatively identified and measured at 6, 12, 24, and 48 h after oral administration. Structures were proposed for eight metabolites. 3-MCPD 1-monopalmitate was converted to free 3-MCPD, which formed the phase II metabolites. All of the metabolites were chlorine-related chemical components; most of them existed in urine, reflecting the excretion pattern of 3-MCPD esters. Understanding the metabolism of 3-MCPD esters in vivo is critical for assessing their toxicities.

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