Volume 104, Issue 10 pp. 3578-3586
RESEARCH ARTICLE

Evaluation of 6β-Hydroxycortisol and 6β-Hydroxycortisone as Biomarkers for Cytochrome P450 3A Activity: Insight into Their Predictive Value for Estimating Oral Immunosuppressant Metabolism

Xi Luo

Xi Luo

School of Life Sciences, Central South University, Changsha, Hunan, China

School of Pharmaceutical Sciences, Central South University, Changsha, Hunan, China

The State Key Laboratory of Medical Genetics, Central South University, Changsha, Hunan, China

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Liyun Zheng

Liyun Zheng

School of Pharmaceutical Sciences, Central South University, Changsha, Hunan, China

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Ningfang Cai

Ningfang Cai

Department of Pharmacy, Zhangzhou Municipal Hospital of Fujian Province, Zhangzhou, Fujian, China

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Qing Liu

Qing Liu

School of Pharmaceutical Sciences, Central South University, Changsha, Hunan, China

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Shuang Yang

Shuang Yang

The Third Xiangya Hospital, Central South University, Changsha, Hunan, China

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Xiaoai He

Xiaoai He

Haikou People's Hospital and Affiliated Haikou Hospital of Xiangya Medical School, Central South University, Haikou, Hainan, China

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Zeneng Cheng

Corresponding Author

Zeneng Cheng

School of Pharmaceutical Sciences, Central South University, Changsha, Hunan, China

Telephone: +86-731-2650451; Fax: +86-731-2650451; E-mail: [email protected]Search for more papers by this author
First published: 06 July 2015
Citations: 1

Abstract

The combined clearance of endogenous 6β-hydroxycortisol and 6β-hydroxycortisone is suggested biomarker for in vivo cytochrome P450 3A (CYP3A) activity. We aimed to determine whether the combined clearance of these two markers together with information of biopharmaceutics classification system (BCS) of drugs could be used to predict CYP3A-mediated metabolism of immunosuppressants. The BCS of drug formulations were determined based on the solubility and permeability. Sixty-seven healthy subjects were divided into three groups and group 1 (n = 23), 2 (n = 22), and 3 (n = 22) received oral single dose of cyclosporine, tacrolimus, and sirolimus, respectively. Blood and urine samples were gathered at various times. The combined clearance of 6β-hydroxycortisol and 6β-hydroxycortisone correlated significantly with cyclosporine pharmacokinetics (p < 0.001) after oral dose of a BCS 1 formulation, whereas no relationships were seen after administration of tacrolimus and sirolimus formulations, both of which belonged to BCS 2. Regarding the biopharmaceutical characteristics, the endogenous CYP3A biomarker explains 74.5% of variability in oral cyclosporine clearance between individuals. © 2015 Wiley Periodicals, Inc. and the American Pharmacists Association J Pharm Sci 104:3578–3586, 2015

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