Study on relative bioavailability of ferulic acid of combination Radix Angelicae Sinensis and Cortex Cinnamomi in mice / 中国中药杂志

<p><b>OBJECTIVE</b>To study the phamacokinetics and relative bioavailability of combination Radix Angelicae Sinensis and Cortex Cinnamomi.</p><p><b>METHOD</b>The content of ferulic acid in plasma was determined directly by HPLC after oral administration of Cortex Cinnamomi in combination individually with Radix Angelicae Sinensis. The plasma concentration-time curve were plotted. The main pharmacokinetic parameters and relative bioavailability were obtained.</p><p><b>RESULT</b>The plasma concentration-time curve of fenalic aclid conformed to one-compartment model. The relative bioavailability of Cortex Cinnamomi combined with Radix Angelicae Sinensis were 226.75%.</p><p><b>CONCLUSION</b>By the statistical analysis, Cortex Cinnamomi combined with Radix Angelicae Sinensis can increase the relative bioavailability of ferulic acid.</p>

Study on enhancing bioavailability of paeoniflorin by combined use with Chinese herbs for inner-warming / 中国中西医结合杂志

<p><b>OBJECTIVE</b>To study the influence of Chinese herbs for inner-warming on the bioavailability of paeoniflorin (PF) and its mechanism.</p><p><b>METHODS</b>Chinese herbs (pepper fruit, evodia fruit, cassia bark, fennel fruit and prickly-ash peel) were separately used in combination with PF for gastrogavage to mice. Reversed phase high-performance liquid chromatography was used to determine the plasma concentration of PF in mice after medication. The bioavailability of PF was calculated and compared, taking single use of red peony root for control.</p><p><b>RESULTS</b>The pharmacokinetics of PF in mice was conformed to the one-compartment model, as combined use with Chinese herbs for inner-warming, the relative bioavailability of PF was 137.22% for pepper fruit, 123.62% for evodia fruit, 108.39% for cassia bark, 226.02% for fennel fruit and 116.73% for prickly-ash peel, there were difference of Cmax and AUC(0-infinity) in comparison of these data with the control group (P < 0.05), but with no difference of tmax (P > 0.05).</p><p><b>CONCLUSION</b>The Chinese herbs used in this experiment in combination with red peony root could enhance the bioavailability of PF, which illustrated the scientific meaning of the recipe combination of Chinese herbs for activating blood circulation and inner-warming viewing from pharmacodynamics.</p>