【摘要】 目的 :探讨中医清热利胆、理气活血方药对豚鼠胆囊收缩素受体 (CCK R)表达的调节及作用机制。方法 :采用放射免疫分析法和受体放射配基结合法检测对照组、高胆固醇组、自然恢复组及治疗组豚鼠门静脉血胆囊收缩素 (CCK)水平、胆囊CCK R的最大结合容量 (Bmax)和亲合力 (Kd) ,同时观察空腹胆囊体积 (FV)、空腹胆囊胆汁量 (FB)和餐后胆囊体积 (PV )、餐后胆囊胆汁量 (PB)及胆囊收缩率 (E)、胆汁胆固醇浓度的变化。结果 :与对照组比较 ,高胆固醇组豚鼠FV、FB增大 (P <0 0 5 ) ,PV、PB也增大 ,胆囊收缩率下降 (P <0 0 1) ,胆汁胆固醇浓度升高 (P <0 0 5 ) ,门静脉血CCK水平及CCK R的Kd 无改变 ,而CCK R的Bmax下降 (P <0 0 1) ;治疗组上述各项指标治疗后恢复正常。结论 :清热利胆、理气活血方药可能通过上调胆囊CCK R表达促进胆囊动力功能恢复 ,其作用机制可能与降低胆汁中胆固醇浓度有关。更多还原

【Abstract】 Objective: To explore the regulatory effect of clearing Heat secreting bile regulating Qi flow and activating blood circulation (CSRA) principle on cholecystokinin receptor (CCK R) and its mechanism. Methods: Cholecystokinin (CCK) in serum of portal venous blood, maximum binding capacity (B max ) and affinity (K d) of CCK R levels in gallbladder of guinea pigs allocated in four groups (control, high cholesterol, natural recovery and treated groups) were determined using radioimmunoassay and radioligand receptor assay (RRA). At the same time, changes of fasting volume (FV) and postprandial volume (PV) of gallbladder, fasting and postprandial bile (FB and PB) in gallbladder, gallbladder contraction rate (GCR) and cholesterol concentration (CC) in bile were observed. Results: Compared with the control group, after two weeks of high cholesterol feeding, increase of FV, FB, PV, PB and CC (P<0 05), and decrease of GCR (P<0 01) and Bmax were found in cholesterol group, but with no significant change in Kd and CCK level. The above mentioned criteria were restored to normal range in the treated group. Conclusion: CSRA principle could promote the recovery of gallbladder contraction by regulating CCK R expression in it, its mechanism is possibly correlated with reduction of cholesterol concentration in bile.更多还原