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Effect of inducible nitric oxide synthesis inhibitor on CYP1A2 protein expression in BCG-immune liver damage in mice
Yong-Zhi Xue, Guo-Liang Zhang, Xiu-Yun Bu, Xin Wang, Dan Li
Yong-Zhi Xue, Guo-Liang Zhang, Xiu-Yun Bu, Xin Wang, Dan Li, Department of Pharmacology, School of Basic Medical Sciences, Peking Universty, Beijing 100083, China
Supported by: the National Natural Science Foundation of China, No. 30171097, No. 30371665; Peking University Center For Human Disease Genomics Research Foundation, No. 2000-A-1.
Correspondence to: Guo-Liang Zhang, Department of Pharmacology, School of Basic Medical Sciences, Peking University, Beijing 100083, China. zhanggl168@mail.bjmu.edu.cn
Received: March 15, 2004 Revised: April 1, 2004 Accepted: April 27, 2004 Published online: August 15, 2004
AIM: To study the effect of nitric oxide production on CYP1A2 protein expression in immune liver damage induced by Mycobacterium Calmette-Guerin (BCG) in mice.
METHODS: Immune liver damage was induced by intravenous injection of BCG (125 mg/kg) for 2 weeks in vivo. The hepatic tissues injury was estimated by histopathological H-E staining. The protein expression of CYP2E1 and iNOS in hepatic tissues was determined by the method of immunohistochemistry. The correlation between iNOS inducing and liver injury degree was observered by the method of demi-quantification image analysis.
RESULTS: Two weeks after of BCG injection, granuloma was easily observed, and over-expression of iNOS protein was detected in the granulomas. The decrease of CYP1A2 protein expression was observed in mice hepatic tissues. Aminoguanidine, a selective iNOS inhibitor, significantly inhibited iNOS protein expression, and reversed down-regulation of CYP1A2 protein induced by BCG-immune liver damage in mice.
CONCLUSION: Under the BCG-stimulated condition, nitric oxide production participates in the down-regulation of CYP1A2 protein expression induced by immune hepatic injury in mice.
Key Words: N/A
Citation: Xue YZ, Zhang GL, Bu XY, Wang X, Li D. Effect of inducible nitric oxide synthesis inhibitor on CYP1A2 protein expression in BCG-immune liver damage in mice. Shijie Huaren Xiaohua Zazhi 2004; 12(8): 1849-1852
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