Study on in situ intestinal absorption of baicalin contained in Tiangou Jiangya capsules / 中国中药杂志
China Journal of Chinese Materia Medica
;
(24): 894-898, 2013.
Article
in Chinese
| WPRIM
| ID: wpr-318621
ABSTRACT
<p><b>OBJECTIVE</b>To study in situ intestinal absorption kinetics of baicalin contained in Tiangou Jiangya capsules, and the effect of different intestinal segments, pH value, drug concentration and P-gp inhibitor on the absorption.</p><p><b>METHOD</b>The in situ intestinal perfusion test was adopted, and HPLC method was used to determine the content of baicalin in samples at different time points. Ultra-violet (UV) spectrophotometry was used to determine the content of phenol red in samples at different time points.</p><p><b>RESULT</b>When pH value was at 5. 0, 6. 5, 7. 4, the absorption of baicalin was not impacted. P-gp inhibitor verapamil could enhance the absorption of baicalin. When the quality concentration of the test solution ranged between 5-20 g L -1 , the linearity of the absorption amount of baicalin increased. The absorption kinetic equation of baicalin was Y = -0. 073 7X +0. 118 7 (r = 0. 994 8) , K. 0. 073 7 h -1 , t1/2 9. 40 h.</p><p><b>CONCLUSION</b>Baicalin is mainly absorbed in colon. The absorption of baicalin shows the first-order kinetics process, with the absorption mechanism of passive diffusion. Baicalin is a substrate for P-gp.</p>
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Pharmacology
/
Quality Control
/
Reference Standards
/
Benzyl Alcohols
/
Flavonoids
/
Kinetics
/
Verapamil
/
Chemistry
/
Rats, Wistar
/
Lignans
Limits:
Animals
Language:
Chinese
Journal:
China Journal of Chinese Materia Medica
Year:
2013
Type:
Article
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