JOURNAL ARTICLE

Panipenum, a carbapenem antibiotic, increases the level of hepatic UDP-glucuronic acid in rats

N Yamamura, K Imura-Miyoshi, H Naganuma
Drug Metabolism and Disposition: the Biological Fate of Chemicals 2000, 28 (12): 1484-6
11095587
To investigate the mechanism for the enhanced glucuronidation of valproic acid (VPA) by panipenem (PAPM), a carbapenem antibiotic, in rat liver, we carried out studies to investigate whether PAPM increases the activity of UDP-glucuronosyltransferase or the level of hepatic UDP-glucuronic acid (UDPGA) in rats. PAPM had no effect on the UDP-glucuronosyltransferase activity toward VPA both in vivo and in vitro. On the other hand, in vivo treatment with PAPM significantly increased the hepatic UDPGA level by about 1.7-fold (control: 434.5 +/- 65.5 nmol/g of liver; PAPM-treated: 755.2 +/- 92.3 nmol/g of liver). The in vitro formation of VPA glucuronide increased proportionally as a function of the UDPGA concentration up to 0.8 mM. Therefore, the increase in the level of hepatic UDPGA by PAPM is likely to be one of the causal factors for enhancing VPA glucuronidation in vivo.

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