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<p><b>OBJECTIVE</b>To compare the effects of electroacupuncture (EA) at "Dachangshu" (BL 25) or "Tianshu" (ST 25) for visceral sensitivity, gene expression product c-kit of colonic Cajal interstitial cells (ICC) and capsaicin receptor 1 (TRPV1) of irritable bowel syndrome (IBS) rats, so as to investigate the effect and mechanism differences of EA at the back point and the front point of large intestine for IBS rats.</p><p><b>METHODS</b>Forty-two Wistar neonatal rats were randomly divided into a blank group (9 rats) and a model group (33 rats). IBS model was established with mother and child separation, acetic acid enema in young rats and colorectal dilatation method. Twenty-seven IBS rats in life were randomly divided into a model control group, a Dachangshu group and a Tianshu group, 9 rats in each group. EA (disperse-dense wave, 2 Hz/100 Hz, 0.1-0.3 mA) for 20 min was used at "Dachangshu" (BL 25) and "Tianshu" (ST 25) respectively in the Dachangshu and Tianshu groups, once every other day, totally 5 times. The rats in the model control group were fixed with soft cloth sleeve for 20 min, without acupuncture. No intervention was used in the blank group. The stool property Bristol grading score was recorded before and after intervention in each group. The visceral sensitivity was evaluated by abdominal withdrawal reflex. The latency until the first systolic wave occurred and the number of systolic wave within 90 s were observed. Immunohistochemical was used to detect the positive expressions of c-kit and TRPV1, the ICC colon specific marker.</p><p><b>RESULTS</b>Compared with the blank group, the Bristol score increased，latency period shortened, systolic wave number increased, c-kit and TRPV1 positive expressions increased in the model control group (all <0.01). Compared with the model control group, the Bristol score decreased, latency period increased, systolic wave number decreased, c-kit and TRPV1 positive expressions decreased after intervention in the Dachangshu and Tianshu groups (<0.05, <0.01). Compared with the Dachangshu group, the TRPV1 positive expression decreased after intervention in the Tianshu group (<0.05).</p><p><b>CONCLUSION</b>EA at "Dachangshu" (BL 25) or "Tianshu"(ST 25) can improve the diarrhea in IBS model rats, reduce the visceral sensitivity, and its mechanism may be related to regulating the expressions of colon c-kit and TRPV1. EA at "Tianshu" (ST 25) is more apparent for TRPV1 than at "Dachangshu" (BL 25).</p>
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Objective To observe the analgesic effect of acupuncture at Guanyuan (CV4) and its effect on vasomotor substances in rats with dysmenorrhea due to coagulated cold syndrome. Method The coagulated-cold dysmenorrhea rat model was developed by Estrodiol benzoate and Oxytocin injectin plus physical freezing. The writhing response (writhing latency, writhing frequency, and writhing score) was observed, and the contents of TXB2 and 6-keto-PGF1a were detected by using enzyme-linked immunosorbent assay (ELISA). Result Compared with the saline water group, the writhing latency was significantly shortened, the writhing frequency was significantly increased, and the writhing score was more significantly increased in the model group (P0.05) in the model group. Compared with the model group, the content of plasma 6-keto-PGF1a showed an increasing tendency (P>0.05) and the content of plasma TXB2 showed a decreasing tendency (P>0.05) in the acupuncture group. Conclusion The vasomotor substances are obviously disordered in the blood of cold-coagulated dysmenorrhea rat models. Acupuncture at Guanyuan can improve the writhing response and release pain, and meanwhile positively regulate the vasomotor substances such as TXB2 and 6-keto-PGF1a. The vasomotor substances are plausibly one of the major substances in the action of acupuncture in preventing and treating dysmenorrhea.
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Objective To explore the feasibility of using short-latency somatosensory evoked potentials (SLSEP) to quantitate Deqi.Methods A randomized crossover controlled trial was carried out. Healthy subjects were enrolled and allocated to treatment (thick needle, deep insertion and manipulation for Deqi) and control (thin needle, shallow insertion and no manipulation without Deqi) groups. Somatosensory evoked potentials were recorded before, during and after acupuncture. Deqi was assessed using the score scale in the subjets. The effects of Deqi and no Deqi at point Sanyinjiao (SP 6) on the potentials were observed.Results The preliminary exploration of the feasibility by the trial test showed that the effect of Deqi on short-latency somatosensory evoked potentials had certain regularity. It was worthy to be observed.Conclusion The plan is feasible. The formal test can be conducted.
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Objective To explore the effect of different acupuncture stimuli on uterine micro-circulation of dysmenorrheal rats with cold stagnation syndrome. Methods Totally 32 three-month old female SD rats in diestrus were randomly divided into saline control group, model group, A stimuli group, and B stimuli group, 8 rats in each group. Model group and treatment groups were given whole body freezing combined with estradiol benzoate injection method to establish models. A stimuli group was given deep puncture with manipulation, while B stimuli group was treated by shallow puncture without manipulation. Diameter of uterine capillary,micro-vessel, TXB2, and 6-keto-PGF1αlevels were observed in each group. Results Compared with the saline group, capillary diameter in model group was significantly reduced at 5, 10, 20, 30 min time point (P<0.01);micro-vascular diameter was significantly reduced at 5, 10, 20, 30, 40 min time point (P<0.01);plasma 6-keto-PGF1α levels decreased (P<0.01);TXB2/6-keto-PGF1αincreased significantly (P<0.01). Compared with model group, capillary diameter in A stimuli group enlarged at 5, 10, 20, 30 min time point (P<0.05), micro-vascular diameter dilated at 5, 10, 20, 30, 40 min time point (P <0.01), plasma 6-keto-PGF1α level increased (P <0.05), TXB2/6-keto-PGF1αdecreased significantly (P<0.05);micro-vascular diameter in B stimuli group dilated at 20, 30 min time point (P<0.05), plasma TXB2/6-keto-PGF1α decreased significantly (P<0.05). Compared with B stimuli group, capillary diameter in A stimuli group dilated at 5, 10, 20, 30 min time point (P<0.05) and micro-vascular diameter dilated at 5, 10, 20, 30, 40 min time point significantly (P<0.01). Conclusion Dysmenorrheal rats with cold stagnation syndrome show obvious disorder of the uterus micro-circulation and circulation related substances. Both A and B acupuncture stimuli improved uterus micro-circulation of dysmenorrheal rats with cold stagnation syndrome, and its mechanism may be related to the recovery the balance between TXB2 and 6-keto-PGF1α.
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Objective Infrared thermal imaging can be applied to the diagnosis and auxiliary diagnosis of some diseases . The aim of this study is to explore acupuncture-induced changes in skin temperature in acupoint areas and whether skin temperature in -creases or decreases in the acupoint areas along meridians . Methods Thirty two female SD rats were randomly and equally divided into four groups:saline control,cold congealing and dysmenorrhea model , Sanyinjiao (SP6), and Guanyuan( CV4).Models were es-tablished in the latter three groups by subcutaneous injection of estradiol benzoate at 0.5 mg for 10 successive days and , 1hour after the last administration , intraperitoneal injection of oxytocin at 2 U, followed by exposure of the rats to-25℃in a freezer 4 hours a day for 5 days.Meanwhile , the control rats received normal saline only and were not exposed to low temperature .Infrared thermal imaging was used to measure the skin temperature at the acupoint areas of SP6, Xuehai (SP10), and CV4 before and at 0, 5, 10, 20, 30, 40, 50 and 60 min after needling . R esults At 0 to 5 min after nee-dling, the skin temperature of the left SP6 and right SP10 was signifi-cantly decreased in both the SP6 and CV4 groups ( [ -0. 56 ± 0.22]℃and [-0.48 ±0.11]℃, P0.05). Conclusion The skin temperature of SP6 and SP10 can be regulated by needling both the acupoints of SP 6 and CV4.The increase in the skin temperature of the right SP6 and SP10 in the SP6 group and no change in the CV 4 group indicated dynamic temperature changes in the acupoint area along the meridian after needling.
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Objective To observe the effect on IL-2,TNF,TGF in uterus and serum,and IL-2RmRNA in spleen of menopausal rats with preventive accupuncture on Guanyuan point,and analysis the mechanism.Methods 112 ten month-aged SD female rats examined by vaginal smear were chosen and divided into seven groups.And another 16 three point five month-aged SD female rats were another group.Radio-immunity and hybridiztion in situ methods were applied to observe the effect on IL-2,TNF,TGF in uterus and serum and IL-2R mRNA in spleen of 12,14 and 16 month-aged menopausal rats with preventive accupuncture on Guanyuan point(twice a week,eight weeks continued) in 10th month.Results Compared with the normal group,IL-2,TGF in uterus and serum and TNF in uterus of menopausal rats reduced,TNF in serum came down in the 12th month and went up in 14th and 16th month,IL-2R mRNA in spleen decreased.Compared with the same-aged model group,IL-2,TGF of serum and uterus and TNF in uterus increased.TGF in serum of 14 and 16 month-aged group,IL-2 in uterus of 12 and 16 month-aged group,TNF in uterus of 12 month-aged group and TGF in uterus of 12 and 16 month-aged group rised significantly(P
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@#ObjectiveTo explore the effect of dressing-pretreatment on forepart inflammation in adjuvant arthritis (AA) rats.MethodsAA model was established by subcutaneous injection of Freund's complete adjuvant into the right hind-paw (0.1 ml/animal). 24 Wistar rats were randomly divided into the control group, model group and dressing-pretreatment groups. In dressing-pretreatment group, "Dazhui" (GV14) was applied by a kind of dressing invented by the researchers. The foot swelling rate, serum concentrations of interleukin-1 (IL-1), IL-6 and tumor necrotic factor-α (TNF-α) were assessed.ResultsCompared with the control group, the foot swelling rate and serum concentrations of IL-1, IL-6 and TNF-α of the model group and dressing-pretreatment group increased significantly (P<0.01); but the foot swelling rate and serum concentrations of IL-1 and IL-6 in dressing-pretreatment group decreased significantly compared with those of the model group (P<0.05～0.01), and there was a downtrend in TNF-α. HE stain showed soakage of phlogistic cell in cartilage and arthritis membrane, hyperplasia of vein and breakage of cartilage were better in dressing-pretreatment group compared with that in the model group.ConclusionDressing-pretreatment can decrease forepart inflammation and pathological damage of arthritis in AA rats, and can prevent the harm of consequent disease to some extent.
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Objective To observe the effect of preventive acupuncture and moxibustion at Guanyuan(CV 4)on abnormal activity in early climacteric rats.Methods Using four-month-old female SD rats as young control group,the 24 ten-month-old SD female rats screened by vaginal smear were randomized into 4 groups.The climacteric models by natural aging were established.The changes of estrogen receptor(ER-?)and heat shock protein-70(HSP-70)expressions resulted from the effect of preventive acupuncture and preventive moxibustion were observed.Results The expression of ER-? decreased gradually in the uterus of natural climacteric rats(P