title: Determination and pharmacokinetic comparison of rhein in rats after oral dosed with Da-Cheng-Qi decoction and Xiao-Cheng-Qi decoction.
abstract: Da-Cheng-Qi decoction (DCQD) is composed of dahuang, houpu, zhishi and mangxiao, while Xiao-Cheng-Qi decoction (XCQD) just contains dahuang, houpu, and zhishi. A validated high-performance liquid chromatographic (HPLC) method was developed for the determination and pharmacokinetic comparison of rhein in rats. It was performed on a reversed-phase C(18) column (150 x 4.6 mm) with a mobile phase of methanol and 0.2% acetic acid (89:11, v/v) and ultraviolet detection at 254 nm. The assay was linear over the range 30-3000 ng/mL (r(2) = 0.9991), with mean percentage recovery of 101.4%. The RSD of intra- and inter-day precision were less than 3.0%, with accuracy in the range 96.8-102.5% for each of the concentrations tested. Following oral administration, rhein plasma levels revealed curves characterized by peaks at 20.5 and 30.1 min corresponding to dosages of 15 mg/kg (XCQD) and 20 mg/kg (DCQD) at mean concentrations of 1184.67 and 1814.27 ng/mL, respectively. The half-lives of rhein from XCQD and DCQD were 45.3 and 139.6 min, respectively. AUC(0-12h) of rhein after oral dosage with XCQD and DCQD were 3435.68 and 5382.25 microg/L h, respectively. The pharmacokinetic parameters may be used to guide the clinical prescription compatibility of traditional Chinese prescriptions related to dahuang and mangxiao.
authors.affiliation: Department of Integrated Traditional Chinese and Western Medicine, West China Hospital, Sichuan University, Chengdu, Sichuan Province, People's Republic of China. Wftang900@hotmail.com@
authors.forename: Wen-Fu
authors.initials: WF
authors.lastname: Tang
authors.forename: Xi
authors.initials: X
authors.lastname: Huang
authors.forename: Qin
authors.initials: Q
authors.lastname: Yu
authors.forename: Feng
authors.initials: F
authors.lastname: Qin
authors.forename: Mei-Hua
authors.initials: MH
authors.lastname: Wan
authors.forename: Yong-Gang
authors.initials: YG
authors.lastname: Wang
authors.forename: Mao-Zhi
authors.initials: MZ
authors.lastname: Liang
mesh_terms: D000284:Administration, Oral; D000818:Animals; D000880:Anthraquinones / Q000008:administration & dosage / Q000097:blood* / Q000737:chemistry; D002138:Calibration; D002851:Chromatography, High Pressure Liquid / Q000379:methods; D004305:Dose-Response Relationship, Drug; D004365:Drugs, Chinese Herbal / Q000008:administration & dosage / Q000737:chemistry / Q000302:isolation & purification* / Q000493:pharmacokinetics*; D008297:Male; D015394:Molecular Structure; D010936:Plant Extracts / Q000008:administration & dosage / Q000097:blood* / Q000737:chemistry*; D051381:Rats; D017207:Rats, Sprague-Dawley; D012015:Reference Standards; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013048:Specimen Handling; D013056:Spectrophotometry, Ultraviolet / Q000379:methods
chemical_list: D000880:Anthraquinones; D004365:Drugs, Chinese Herbal; D010936:Plant Extracts; C020491:rhein