TY - JOUR
T1 - Determination of aristolochic acid I in rat urine and plasma by high-performance liquid chromatography with fluorescence detection
AU - Yue, Hao
AU - Chan, Wan
AU - Guo, Lin
AU - CAI, Zongwei
N1 - Funding Information:
The supports of the Research Grant Council, University Grants Committee of Hong Kong (HKBU2459/06M) and the Health and Health Services Research Fund of Hong Kong (05060141) on this study are acknowledged.
PY - 2009/4/1
Y1 - 2009/4/1
N2 - A sensitive and rapid method of high-performance liquid chromatography with fluorescence detection (HPLC-FLD) was developed and applied for the determination of aristolochic acid I (AAI) in rat urine and plasma. Prior to the HPLC analysis, the samples were derivatized to increase fluorescence character. The linear ranges of the calibration curves were 0.48-48 ng in urine and 0.23-69 ng in plasma. The intra- and inter-day precisions referred by relative standard deviation (RSD) were less than 3.2% and 4.0% for urine samples as well as less than 9.4% and 10.8% for plasma samples. The limits of quantification were 0.09 and 0.07 ng in urine and plasma, respectively. The developed method was successfully applied for the determination of AAI in rat urine and plasma samples collected after the oral administrations of AAI standard and Aristolochia contorta Bge. (Madouling) or Aristolochia manshuriensis (Guanmutong) herbal extracts. The ratios of the detected AAI amount in urine compared to the dosing amount of AAI were approximately constant. The concentrations of AAI in rat plasma were much lower than those in urine. The obtained results indicated that the metabolism of the AAI standard and AAI-containing herbs might be different, probably due to the complicated and multiple components in the herbs.
AB - A sensitive and rapid method of high-performance liquid chromatography with fluorescence detection (HPLC-FLD) was developed and applied for the determination of aristolochic acid I (AAI) in rat urine and plasma. Prior to the HPLC analysis, the samples were derivatized to increase fluorescence character. The linear ranges of the calibration curves were 0.48-48 ng in urine and 0.23-69 ng in plasma. The intra- and inter-day precisions referred by relative standard deviation (RSD) were less than 3.2% and 4.0% for urine samples as well as less than 9.4% and 10.8% for plasma samples. The limits of quantification were 0.09 and 0.07 ng in urine and plasma, respectively. The developed method was successfully applied for the determination of AAI in rat urine and plasma samples collected after the oral administrations of AAI standard and Aristolochia contorta Bge. (Madouling) or Aristolochia manshuriensis (Guanmutong) herbal extracts. The ratios of the detected AAI amount in urine compared to the dosing amount of AAI were approximately constant. The concentrations of AAI in rat plasma were much lower than those in urine. The obtained results indicated that the metabolism of the AAI standard and AAI-containing herbs might be different, probably due to the complicated and multiple components in the herbs.
KW - Aristolochic acid
KW - Fluorescence detection
KW - High-performance liquid chromatography
KW - Pre-column derivatization
KW - Traditional Chinese medicine
UR - http://www.scopus.com/inward/record.url?scp=62249136998&partnerID=8YFLogxK
U2 - 10.1016/j.jchromb.2009.02.054
DO - 10.1016/j.jchromb.2009.02.054
M3 - Journal article
C2 - 19272846
AN - SCOPUS:62249136998
SN - 1570-0232
VL - 877
SP - 995
EP - 999
JO - Journal of Chromatography B: Analytical Technologies in the Biomedical and Life Sciences
JF - Journal of Chromatography B: Analytical Technologies in the Biomedical and Life Sciences
IS - 10
ER -