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[Changes of CYP2E1 activity in diabetic rat model]
Abstract:
Diabetic rat model was induced by alloxan. To evaluate CYP2E1 activity indirectly, the activities of aniline dehydroxylase and other drug metabolic enzymes were measured. The pharmacokinetic profile of chlorzoxazone(CZX), a drug probe for CYP2E1, was obtained after a single oral dose of 50 mg.kg-1. The results indicated that diabetes increased aniline dehydroxylase activity by 53%. The Cmax and AUC of chlorzoxazone in diabetic rats were reduced 37% and 34%, respectively. The Tpeak of 6-hydroxychlorzoxazone in diabetic rats was shortened apparently. The hydroxylation index described by the AUC ratio of 6-hydroxychlorzoxazone to chlorzoxazone or the ratio of concentration of 6-hydroxychlorzoxazone to chlorzoxazone, which indicated the ability of hydroxylation, was increased in diabetes. In conclusion, diabetes can induce CYP2E1 activity, suggesting that diabetic patients should be cautious when taking some therapeutic drugs which metabolized by CYP2E1.
Insights
Diabetes increases the activity of CYP2E1, a key enzyme in drug metabolism. This suggests that diabetic patients need to be cautious with medications processed by CYP2E1.
Area of Science:
- Biochemistry
- Pharmacology
- Endocrinology
Context:
- Diabetes mellitus is a metabolic disorder affecting drug metabolism.
- Cytochrome P450 enzymes, particularly CYP2E1, play a crucial role in xenobiotic metabolism.
- Alloxan-induced diabetic rat models are commonly used to study diabetes-related physiological changes.
Purpose:
- To investigate the impact of diabetes on the activity of CYP2E1.
- To evaluate changes in drug metabolic enzyme activity in diabetic rats.
- To assess the pharmacokinetic profile of chlorzoxazone as a probe for CYP2E1 activity.
Summary:
- Diabetes significantly increased aniline dehydroxylase activity by 53% in rats.
- Chlorzoxazone's Cmax and AUC were reduced by 37% and 34% in diabetic rats, respectively.
- The hydroxylation index, indicating metabolic capacity, was elevated in diabetic rats, confirming increased CYP2E1 activity.
Impact:
- Diabetes mellitus induces CYP2E1 activity.
- Diabetic patients may require dosage adjustments for drugs metabolized by CYP2E1.
- This research highlights the importance of considering diabetes status in pharmacotherapy.
