摘要:
Objective: To observe the changes in numbers and degranulation status of local mast cells (MCs) of the complementary acupionts, as well as the concentrations of serum histamine and bradykinin after acupuncture at rat's complementary acupionts of Yanglingquan (GB 34) and Yinlingquan (SP 10), for exploring the mechanisms of the synergistic effect of complementary acupionts. Methods: Using random number table method, 40 Wistar rats were randomly divided into a blank control group (group K), an acupuncture at Yanglingquan (GB 34) group (group A), an acupuncture at Yinlingquan (SP 9) group (group B), an acupuncture at Yanglingquan (GB 34) and Yinlingquan (SP 9) group (group AB), and an acupuncture at points near Yanglingquan (GB 34) and Yinlingquan (SP 9) group (group CD), 8 rats in each group. Group A received acupuncture at Yanglingquan (GB 34); group B received acupuncture at Yinlingquan (SP 9); group AB received acupuncture at Yanglingquan (GB 34) and Yinlingquan (SP 9); group CD received acupuncture at the control points [points 3 mm away from Yanglingquan (GB 34) and Yinlingquan (SP 9) respectively]. Acupuncture was performed at bilateral points in each group. Rats in group K were fixed using the same method as rats in the other 4 groups without acupuncture stimulation. Needles of 0.35 mm in diameter and 40 mm in length were used for acupuncture. Needle handle was connected to the G6805-Ⅱ mode electroacupuncture (EA) device after needling qi was obtained, with sparse-dense wave, frequency of 2 Hz/100 Hz and current of 1 mA to keep the needle handles slightly tremulous while the rats kept quiet. Rats were continuously stimulated by EA for 20 min each time. Experimental interventions were conducted on the 1st, 3rd, 5th and 7th days when the experiment started, for 4 times in total. Specimens from rats in each group were collected 2 h after the 7th day. The levels of histamine and bradykinin in serum were detected by enzyme-linked immunosorbent assay (ELISA). Local tissues of the points were used to prepare cryosections. The changes of MCs were observed after toluidine blue staining. Results: Compared with group K, the numbers and degranulation rates of MCs in group A, group B, group AB and group CD were significantly increased (all Pgroup B > group A > group CD > group K, and the differences were statistically significant (all P0.05). Conclusion: The number and degranulation rate of MCs of the complementary acupionts are significantly increased after acupuncture at complementary acupionts of Yanglingquan (GB 34) and Yinlingquan (SP 9) of rats, and the serum levels of histamine and bradykinin are increased, which may be one of the mechanisms of the synergism produced by the combination of complementary acupionts.%目的:观察针刺大鼠相对穴阳陵泉与阴陵泉后穴区局部肥大细胞数量、脱颗粒情况及血清中组织胺、缓激肽的含量变化,探索"相对穴"协同增效的作用机制.方法:将40只Wistar大鼠采用随机数字表法随机分成空白对照组(K组)、针刺阳陵泉组(A组)、针刺阴陵泉组(B组)、针刺阳陵泉与阴陵泉组(AB组)及针刺阳陵泉与阴陵泉旁开组(CD组),每组8只.A组针刺阳陵泉;B组针刺阴陵泉;AB组针刺阳陵泉和阴陵泉;CD组分别采用阳陵泉和阴陵泉外侧旁开3 mm处作为旁开对照点,进行针刺.均选取双侧穴位.K组实验开始后采用与其余4组相同的方法固定,不给予针刺刺激.选用直径0.35 mm,长40 mm毫针,针刺得气后针柄接G6805-Ⅱ型电针治疗仪,选用疏密波,频率2 Hz/100 Hz,电流强度1 mA,以针柄轻微颤动且大鼠能保持安静为宜.每次电针持续刺激20 min.在开始后的第1、3、5、7天进行实验干预,共4次.各组大鼠于第7天干预完成2 h后取材.采用酶联免疫吸附法(ELISA)检测血清中组织胺和缓激肽的含量变化;穴区局部组织做冰冻切片,甲苯胺蓝染色,观察穴区肥大细胞(MCs)的变化.结果:与K组相比,A组、B组、AB组及CD组的MC数量及脱颗粒率均明显升高(均PB组>A组>CD组>K组,且差异有统计学意义(均P0.05).结论:针刺"相对穴"阳陵泉与阴陵泉后穴区局部MC数量及脱颗粒率显著增高,血清中组织胺和缓激肽的含量升高,可能是"相对穴"配伍协同增效的机制之一.