Abstract
Lipopolysaccharide (LPS) endotoxin is an active component in the outer membrane of Gram-negative bacteria. LPS is usually used as an inflammatory animal model. During the inflammation, diarrhea and changes in plasma proteins, in hepatic and/or intestinal microsomal cytochrome P450 (CYP) isozymes, and in the renal and/or biliary excretion of drugs have been reported. Thus, in rats pretreated with lipopolysaccharide endotoxin isolated from Klebsiella pneumoniae (KPLPS rats), the absorption, distribution, metabolism, and excretion of drugs could be expected to be altered. Interestingly time-dependent effects on the hepatic CYP isozymes have been reported in KPLPS rats. Thus, in KPLPS rats, the pharmacokinetics of drugs which are mainly metabolized via CYP isozymes could be expected to be time-dependent. In this review, an attempt to explain changes in pharmacokinetics of drug reported in the literature was made in terms of CYP isozyme changes or urinary and/or biliary excretion changes in KPLPS rats.
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