Effect of baicalin on pharmacokinetics of chlorogenic acid in rabbits / 中国中药杂志

<p><b>OBJECTIVE</b>The objective of this paper is to investigate the pharmacokinetics of Chlorogenic acid (CA)and CA-Baicalin compound after intravenous injection (iv) in rabbits.</p><p><b>METHOD</b>Ten rabbits were randomly divided into two groups. One group were administered CA (6 mg x kg(-1)) by iv, while the other were treated with CA (6 mg x kg(-1))-baicalin (90 mg x kg(-1)) compound by iv. administration. The concentration of CA in plasma was determined by HPLC. The key parameters of pharmacokinetics were calculated and analyzed by kinetic software.</p><p><b>RESULT</b>Both Concentration-time courses of CA alone and CA-Baicalin compound were consistent with a two-compartment model after administration. The key pharmacokinetic parameters of CA alone were significantly different from that of CA-Baicalin compound (P < 0.05). Compared with the group treated with CA alone, the group treated with CA-Baicalin compound had dramatic increased in AUC(0-infinity), MRT and T1/2alpha.</p><p><b>CONCLUSION</b>There are significant difference between the pharmacokinetics of CA and CA-Baicalin compound in rabbits. Baicalin has impact on the pharmacokinetics of CA in rabbits.</p>

Study on transdermal absorption of piperine in Erxiekang plaster / 中国中药杂志

<p><b>OBJECTIVE</b>To research the absorbed character of piperine in Erxiekang plaster, and piperine by transdermal absorption was determined.</p><p><b>METHOD</b>The percutaneous absorption of piperine in vitro at different times was conducted by Franz osmosis and diffusion apparatus as well as high-performance liquid chromatography.</p><p><b>RESULT</b>It showed that the piperine through skins of mice gradually increased within the experiment time. After 52 h, the penetration of piperine was 78.51%, and remained basically unchanged.</p><p><b>CONCLUSION</b>The method is reliable, and can be used for Erxiekang plaster of determination of transdermal absorption.</p>