Orthogonal design to sift the optimal parameter of Neiguan acupuncture for cerebral infarction

The individual difference and non-repeatability in acupuncture have not only restricted the devel- opment of acupuncture, but have also affected the specificity of acupoints. The present study used instruments to control needle depth, lifting and thrusting frequency, and the duration of acupuncture. Effects of the quantified acupuncture were observed at Neiguan （PC6） with different stimulation parameters. A frequency of 1, 2, or 3 Hz and duration of 5, 60, or 180 seconds were used to observe cerebral blood flow and ratio of infarct volume recovery. Results showed that stimulation at Neiguan with a frequency of 1 Hz and long duration of 180 seconds or 2/3 Hz and long duration of 5/60 seconds significantly increased cerebral blood flow and decreased the ratio of infarct volume. In- teractions between frequency and duration play a critical role in quantified acupuncture therapy.

THE INFLUENCE OF ELECTRO-ACUPUNCTURE AT NEIGUAN AND FIVE SHU POINTS OF TWELVE REGULAR MERIDIANS AT DIFFERENT TIME ON SYSTOLIC TIME INTERVAL OF NORMAL YOUNG ADULTS

The influence of electro-acupuncture at Neiguan (PC 6)and five shu points of twelve regular meridians at different time on systolic time interval (ST I) of normal young adultswere studied with 6×6 Latin square design in this work.In 12 groups according to 12 regular merldlans,the STIs were measured respectively just before and after electro-acupuncture on Neiguan andfive shu points at 00:00,04:00,08:00,12:00,16:00 and 20:00 of a day.It was found thatexcept the PEPI and PEPI/LVETI ratio among Shenmen(HT 7),Shaochong(HT 9)and Neiguan,Guanchong(TE)and Yemen(TE 2)points,the effects of electro-acupuncture at Neiguan pointand five shu points of twelve regular meridians on the indices of STI of normal young adults wereshowing no slgnificant differences.There also was no difference in different sex.But the indices ofSTI were changed when electroacupuncture on the different points of different meridians at differenttime.

Mechanisms on Correlation between the Pericardium Meridian and Heart Effects of Electroacupuncture at Neiguan and Other Acupo

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CLINICAL APPLICATION OF NEIGUAN (内关 PC 6) IN THE TREATMENT OF DISORDERS OF THE DIGESTIVE SYSTEM——THE RELATED RESEARCH PROGRESS

In the present paper, the authors review recent situations of clinical application of Neiguan (PC 6内关), etc. in the treatment of disorders of the digestive system and its related research progresses. In clinical practice, Neiguan (PC 6) is usually selected as one of the main acupoints to treat gastrointestinal reactions induced by ① nausea and vomiting, ② hiccup, ③ gastrointestinal dyskinesia, ④ gastritis, and ⑤ intra-gastric examination, cesarean section, etc. Concerning experimental studies, the effects of Neiguan (PC 6), etc. on ① gastric electrical activities, ② gastrointestinal motion, ③ gastrointestinal hormone secretion, and ④ gastric mucosal structure were observed. Results indicated that Neiguan (PC 6) is an important and effective acupoint for treatment of gastrointestinal disorders in clinic. Stimulation of Neiguan (PC 6) induced favorable regulation of both the peripheral nervous system and central nervous system, and changes of the gastrointestinal hormone secretion may contribute to its effects in treating various disorders.

ACUPUNCTURE AT NEIGUAN POINT FOR TREATMENT OF 106 CASES OF LOW PULSE PRESSURE SYNDROME

In spite of normal mean aterlal pressure,decrease of pulse pressure can induce a seriesof clinical symptoms,which is termed as low pulse pressure syndrorne.Acupuncture at bilateralNeiguan（PC 6）is Capable of raising systolic pressure, lowering diastolic pressure, increasing pulsepressure difference and eliminating corresponding symptoms.The effective rate was more than 92％in this observation.

NEIGUAN(PC 6) BLOCKING FOR PREVENTING NAUSEA AND VOMITING CAUSED BY SUBARACHOID MORPHINE ANALGESIA

To find a simple and an inexpensive by method to reduce postoperative nausea and vom iting abbreviated to (PONV) caused subarachoid morphine analgesia. Methods: ninty-eight gyneeco logic patients who took 0. 5 mg morphine by subarahaid space to control postoperative pain, randomly divided into group Ⅰ (n = 50) whose bilateral Neiguan were blocked by 0. 25% bupivacaine 2 ml, group Ⅱ (n= 48), who were intravenously injected ondansetron 4 mg, preoperatively and postopera tively to prevent nausea and vomiting. The numbers of the patients experienced PONV were observed for 48 hrs after operation. Result: group i had 15 patients, group Ⅱ had 14 ones, who experienced ~ (P >0. 05 ), Conclusion: Neiguan blocking can effectively prevnt PONV caused by subara choid morphine anslgesia without side effects.

Electroacupuncture at the Renzhong (DU 26) and Neiguan (PC 6) acupoints repairs the DNA of nervous tissue supplied by the middle cerebral artery in rats

This study compares the changes of DNA repair in brain tissue dominated by the middle cerebral artery after electroacupuncture at the acupoints of Renzhong （DU 26）, Neiguan （PC 6）, Quchi （LI 11） and Zusanli （ST 36） in rats. In the apurinic/apyrimidinic endonuclease DNA basic group reparative excision experiments, the apurinic/apyrimidinic endonuclease activity of brain tissue increased slightly after electroacupuncture in rats. In the DNA polymerase β （Pol β）experiments, the Pol β ac-tivity of brain tissue increased after electroacupuncture, especially at DU 26 and PC 6. In the DNA ligase experiments, the expression of DNA ligase 1 in brain tissue increased significantly after electroacupuncture. These findings demonstrate increased activity of apurinic/apyrimidinic en-donuclease, Pol β and DNA ligase 1 after electroacupuncture at DU 26 and PC 6. Also, DNA repair in brain tissue supplied by the middle cerebral artery is promoted after electroacupuncture at DU 26 and PC 6, which are more effective than the LI 11 and ST 36 acupoints .

Observation Of Reaction On Different Blood Pressure Treated By Needling Neiguan

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EFFECT OF ELECTRO-ACUPUNCTURE OF “NEIGUAN” ON SPONTANEOUS DISCHARGES OF SINGLE UNIT IN AMYGDALOID NUCLEUS IN RABBITS

In this paper,the regularity on spontaneous dis-charges of the single unit in amygdaloid nucleus(AMYG)in rabbits were analyzed and whether thesignal of Electro-acupuncture(EA)at Neignan (P 6)can reach the AMYG was further observed withthe technique of glass microelectrode.It was foundthat the signals of EA at Neignan can reach AMYGand activate or inhibit the electrical activity of somencurons,manifesting two response patterns:fre-quency-increasing and frequency-decreasing.Addi-tionally,the same neuron had a different response tothe signals of EA at Neiguan and Zusanli(St 36),suggesting that a relative specificity of acupoints ispresent.

EFFECT OF α_1 AND α_2 RECEPTORS IN THE RABBIT THORACIC SPINAL CORD ON ELECTROACUPUNCTURE AT "NEIGUAN" FOR TREATMENT OF ACUTE MYOCARDIAL ISCHEMIA

In the present paper, the effect of α1 and α2 subtypes of the thoracic spinal cord on electroacupuncture (EA)-induced improvement of ischemic cardiac electrical and mechanical activities was observed in 80 anesthetized rabbits by using ECG-ST, MBP, LVP and dp/dt max as indexes. Results showed that:1) EA at "Neiguan" could significantly improve the electrical and mechanical activities of the ischemic heart; 2) the effect of EA could be enhanced to a certain degree when α1 receptors of the thoracic spinal cord were activated by subarachnoid microinjection of phenylephrine, while it was weakened when α1 receptors were inhibited by microinjection of parison; and 3) activation or inhibition of α2 receptors of the thoracic spinal cord by microinjection of clonidine and yohimbine had no marked influence on the effect of EA in improving electrical activity of the ischemic heart, but when activated,they could weaken the effect of EA in raising MBP; while suppressed, they had no any striking influence on the effect of EA in raising MBP. It suggests that among α-receptors, predominantly α1-receptors participate in the process of EA-induced improvement of performance of ischemic heart.

Clinical Effect of Electroacupuncture Baihui and Neiguan Acupoint on Cognitive Function Recovery in Elderly Patients after General Anesthesia

Objective:To study and analyze the clinical effect of electroacupuncture at Baihui and Neiguan Points on cognitive function recovery of elderly patients after general anesthesia.Methods:The subjects were 80 elderly patients who received general anesthesia from January 2019 to February 2021.According to different anesthesia methods,they were divided into research group(electroacupuncture at Baihui and Neiguan combined with conventional drug anesthesia)and control group(simple drug anesthesia).The postoperative cognitive function recovery of the two groups was observed and compared.Results:Compared with the control group,the MMSE score and POCD incidence of research group were significantly better.There was significant difference between the two groups(P<0.05).Conclusion:Conclusion electroacupuncture at Baihui and Neiguan combined with conventional drug anesthesia can promote the recovery of cognitive function and prevent cognitive dysfunction in elderly patients under general anesthesia.

Effect of electroacupuncture at Neiguan(PC6)at different time points on myocardial ischemia reperfusion arrhythmia in rats

OBJECTIVE:To observe the effects of electroacupuncture at Neiguan(PC6)at different time points on reperfusion arrhythmia(RA)after myocardial ischemia and reperfusion in rats,and to investigate the correlation of this protective effect with nerve growth factor(NGF),tyrosine kinase A(Trk A),tyrosine hydroxylase(TH),and norepinephrine(NE).METHODS:A total of 72 Sprague-Dawley male rats were randomly divided into six groups(n=12 rats/group):normal group(Norm),sham operation group(Sham),ischemia reperfusion group(I/R),pre-ischemic electroacupuncture group(EAI),pre-reperfusion electroacupuncture group(EAII),post-reperfusion electroacupuncture group(EAIII).The myocardial ischemia-reperfusion injury(MIRI)model was induced by occlusion of left anterior descending coronary artery for 20 min followed by reperfusion for 40 min in rats.With no intervention in the Norm group and only threading without ligation in the Sham group.Electroacupuncture pretreatment at 20 min/d for 7 d before ligation in the EAⅠgroup,20 min of electroacupuncture before reperfusion in the EAII group and 20 min of electroacupuncture after reperfusion in the EAIII group.The electrocardiogram(ECG)of each group was recorded throughout the whole process,and the success of the MIRI model was determined based on the changs of J-point and T-wave in the ECG.The arrhythmia score was used to record premature ventricular contractions,ventricular tachycardia and ventricular fibrillation during the reperfusion period to assess the reperfusion induced arrhythmias.The expression levels of NGF,Trk A,TH protein were measured by Western blot.Moreover,the expression levels of plasma and myocardial NE levels were detected by enzyme linked immunosorbent assay.RESULTS:The differences between Norm group and Sham group were not statistically significant in all indexes.Arrhythmia score,myocardial NGF,Trk A,TH,and NE expression were significantly higher in the I/R group compared with the Sham group.Arrhythmia score,myocardial NGF,Trk A,TH,and NE expression were significantly lower in each EA group compared with the I/R group.CONCLUSION:Electroacupuncture at Neiguan(PC6)at different time points can reduce the incidence and severity of reperfusion arrhythmias in rats.This protective effect is related to electroacupuncture regulating NGF,Trk A,TH,NE expression and reducing sympathetic hyperactivation.

经皮穴位电刺激手环行内关穴刺激对全麻甲状腺切除术后恶心呕吐的影响

目的 探讨围术期采用经皮穴位电刺激手环行内关穴刺激对全麻甲状腺切除术后恶心呕吐的影响。方法 选择择期在全麻下行甲状腺切除术的女性患者72例,年龄18~50岁,ASAⅠ或Ⅱ级。采用可变区组随机化将患者1∶1随机分配入两组:电刺激组和对照组,每组36例。两组患者均在麻醉诱导前佩戴国产经皮穴位电刺激手环,电极对准内关穴。电刺激组开机刺激内关穴,调整强度使患者感觉手部关联区域有麻刺感且可耐受,固定手环后关机;手术结束时立即打开手环,给予麻醉诱导前确定的刺激强度,持续佩戴24 h。对照组同样佩戴24 h,但始终不通电。记录术后24 h内术后恶心呕吐(PONV)例数及止吐药物的使用情况。结果 与对照组比较,电刺激组术后24 h内PONV发生率、术后呕吐发生率明显降低(P<0.05),且差异主要出现在术后1~6 h(P<0.05)。两组不同时间段止吐药物补救率差异无统计学意义。结论 采用穿戴式手环行经皮内关穴电刺激可以有效降低甲状腺切除术后24 h内PONV发生率。

针刺足三里、内关穴对老年髋关节置换术后镇痛疗效及对血清炎症因子的影响

目的探讨针刺足三里、内关穴对老年髋关节置换术后镇痛疗效及对血清炎症因子的影响。方法选择196例行全髋关节置换术的老年患者作为研究对象,采用随机数字法平均分为观察组与对照组:对照组术后给予常规对症止痛及冰袋冷敷治疗,观察组术后6 h在对照组基础上给予足三里、内关穴针刺治疗。于术后6 h、24 h、48 h、72 h及第5天采用疼痛视觉模拟评分(Visual analogue scale,VAS)评价患者疼痛状态,于术后6 h、48 h及72 h评价术后胀气情况;于术后6 h、24 h、48 h及72 h检测血清炎症因子:前列腺素E2(Prostaglandin E2,PGE2)、白细胞介素-1β(Interleukin-1β,IL-1β)、肿瘤坏死因子-α(Tumor necrosis factor-α,TNF-α);于髋关节置换术前、术后72 h、出院时采用Harris髋关节评分标准评价髋关节功能。结果两组患者术后24 h VAS评分最高,随后逐渐降低(P<0.05);术后48 h观察组VAS评分降至术后6 h水平,而对照组仍高于术后6 h水平(P<0.05);术后24 h、48 h、72 h及第5天观察组VAS评分均低于对照组(P<0.05)。术后两组患者腹胀评分均逐渐降低(P<0.05);术后48 h、72 h观察组腹胀评分低于对照组(P<0.05)。观察组术后肠鸣音出现及恢复正常时间、首次排气及排便时间均较对照组短(P<0.05)。两组患者术后24 h PGE2、IL-1β、TNF-α水平最高,术后72 h逐渐降低(P<0.05);术后5 d观察组PGE2、IL-1β、TNF-α水平降至术后6 h水平,而对照组仍高于术后6 h水平(P<0.05);术后24 h、72 h及第5天观察组PGE2、IL-1β、TNF-α水平均低于对照组(P<0.05)。两组术后Harris髋关节评分均逐渐升高(P<0.05);术后72 h及出院时观察组Harris髋关节评分高于对照组(P<0.05)。结论针刺足三里、内关穴可以更好地降低老年髋关节置换术后疼痛程度,缩短疼痛时间,同时更好地促进胃肠道功能恢复,其机制可能与降低PGE2、IL-1β、TNF-α等炎症因子相关。

内关穴CD34^(+)和c-kit^(+)双阳性Telocytes的鉴定及其对“逆灸”的形态响应

为探究telocytes(TCs)在内关穴的形态特征及其与周围结构的关系,分析“逆灸”对其微细结构的形态响应,本文选用健康SD雄性大鼠为研究对象,分为正常组和艾灸干预组,正常组不做处理,艾灸干预组进行“逆灸”内关穴10 d,通过HE、Masson染色,CD34+和c-kit+免疫荧光双标,透射电镜检测,进行系统研究。结果显示,内关穴分布有丰富的TCs,它们与皮肤中的血管、神经、脂肪细胞、筋膜和胶原纤维等密切相接,显示出其与周围成分的联系功能。进一步发现,与正常组对比,“逆灸”组TCs的突起(Tps)增长,TCs周围胞外囊泡增多,TCs之间的细胞连接增加,表明“艾灸”可在形态上激活TCs,并增强其信息传递功能。提示,作为心包经的关键穴位,内关穴中的TCs有望成为艾灸预防心血管疾病机制研究的新靶位。

针刺右内关穴配合康复训练治疗孤独症谱系障碍患者言语障碍的临床研究

目的基于大脑偏侧化理论观察针刺右内关穴配合康复训练治疗孤独症谱系障碍(autism spectrum disorder,ASD)患者言语障碍的临床疗效。方法将114例ASD伴言语障碍患者随机分为A组、B组和C组,每组38例。A组采用针刺右内关穴配合康复训练治疗,B组采用偏侧化治疗配合康复训练治疗,C组仅采用康复训练治疗。观察3组治疗前后孤独症儿童行为量表(autism behavior checklist,ABC)、儿童孤独症评定量表(childhood autism rating scale,CARS)、孤独症治疗评估量表(autism treatment evaluation checklist,ATEC)评分及S-S语言发育迟缓检查法中语言理解功能和表达功能评分的变化情况。结果3组治疗后ABC、CARS、ATEC评分均较同组治疗前显著降低,语言理解功能和表达功能评分均显著升高,差异均具有统计学意义(P<0.05)。A组治疗后ABC评分明显低于C组,CARS、ATEC评分明显低于B组和C组,语言理解功能评分明显高于C组,表达功能评分明显高于B组和C组,差异均具有统计学意义(P<0.05)。结论针刺右内关穴配合康复训练治疗ASD患者言语障碍疗效确切。

Effect of acupuncture at Neiguan (PC 6) on cardiac function using echocardiography in myocardial ischemia rats induced by isoproterenol

OBJECTIVE: To investigate the effect of acupuncture at Neiguan(PC 6) on cardiac function using echocardiography in rat models of myocardial ischemia(MI) induced by isoproterenol(ISO).METHODS: Twenty-seven Sprague-Dawley rats were randomly assigned to normal, model, and acupuncture groups. The model and acupuncture groups were given injections of ISO(85 mg/kg) to establish the MI model. After model establishment,the acupuncture group was treated with acupuncture at Neiguan(PC 6) for 30 min. Echocardiography was used to monitor diastolic and systolic function for 30 min starting from the time after the acupuncture needles were removed. Changes in the length of left ventricular internal diameter at end-diastole(LVIDd), length of left ventricular internal diameter at end-systole(LVIDs), the ratio of mitral peak velocity at early diastole and atrial contraction(E/A), ejection fraction(EF), fractional shortening(FS), and stroke volume(SV) were measured.RESULTS: Compared with the model group at 0and 15 min after needles were removed, the means of LVIDd and LVIDs were significantly lower(P <0.01) and E/A, EF, FS, and SV significantly higher(P < 0.01) in the acupuncture group. In the acupuncture group, the means of LVIDd and LVIDs15 min after the needles were removed were significantly higher(P < 0.01) than those at 0 min. The means of E/A, EF, FS, and SV significantly decreased(P < 0.01) from 0 to 15 min in the acupuncture group.CONCLUSION: These findings indicate that acupuncture at Neiguan(PC 6) can affect cardiac function by increasing left ventricular diastolic and systolic function in MI rat models, but the effect only lasts for 15 min.

电针预处理通过调控AKT/mTOR信号通路减轻缺血再灌注大鼠心肌损伤

目的观察电针预处理对心肌缺血再灌注损伤大鼠的影响并探讨其作用机制。方法30只SD大鼠随机抽取6只为假手术组(只穿线不结扎),剩余大鼠采用冠脉结扎法建立心肌缺血再灌注损失(MIRI)大鼠模型,并在造模前1周分别进行电针内关预处理、雷帕霉素预处理和雷帕霉素+电针内关预处理。造模结束后用HE染色法检测心肌细胞病理形态学变化;ELISA法检测血清中CK-MB和IL-6含量;Western-blot法检测Beclin1、Caspase3及磷酸化的AKT、mTOR蛋白表达。结果与模型组比较,电针组心肌纤维断裂减少、细胞间质出血减少,其损伤程度与假手术组较为接近;与雷帕霉素组比较,雷帕霉素+电针组心肌纤维断裂减少、细胞水肿程度减轻。与假手术组比较,模型组大鼠CK-MB、IL-6、Beclin1和Caspase3表达明显升高,p-AKT、p-mTOR表达明显下调(P<0.01);与模型组比较,电针组大鼠CK-MB、IL-6、Beclin1和Caspase3表达明显下调,p-AKT、p-mTOR表达明显升高(P<0.01);与电针组比较,雷帕霉素+电针组大鼠IL-6、CK-MB、Beclin1和Caspase3表达明显升高(P<0.05或P<0.01),p-AKT、p-mTOR表达明显下调(P<0.01)。结论电针内关预处理减轻大鼠MIRI可能与激活AKT/mTOR信号通路相关。

电针对术后认知功能障碍模型大鼠炎症反应和铁死亡影响的研究

背景术后认知功能障碍(POCD)是增加患者术后发病率和死亡率的重要原因之一。炎症反应和铁死亡是POCD发生的重要机制假说,而电针改善POCD患者学习和记忆功能机制尚不明确。目的观察电针对老年POCD大鼠学习记忆及炎性细胞因子和海马神经元铁死亡的影响,探讨电针改善POCD的作用机制。方法2022年1月—2023年2月选取18~20月龄SD大鼠72只,按照随机数字表法分为3组:对照组(n=24)、模型组(n=24)和电针组(n=24)。根据术后3、7 d两个观察时间点将每组大鼠分为2个亚组(对照组术后3 d亚组、对照组术后7 d亚组,模型组术后3 d亚组、模型组术后7 d亚组,电针组术后3 d亚组、电针组术后7 d亚组),每组12只。采用剖腹探查手术建立POCD模型,选取电针组大鼠百会穴和内关穴进行电针刺激。采用Morris水迷宫装置检测大鼠行为学表现,酶联免疫吸附试验检测血清、海马中白介素(IL)6、IL-10、肿瘤坏死因子α(TNF-α)的水平,海马组织脂质过氧化物(LPO)、Fe^(2+),免疫印迹法检测海马酰基辅酶A合成酶长链家族成员4(ACSL4)、铁蛋白重链1(FTH1)、血磷脂酰胆碱酰基转移酶3(LPCAT3)蛋白表达水平。采用透射电镜观察海马区神经细胞超微结构。结果术后3、7 d大鼠组别与时间对大鼠术前认知功能训练逃避潜伏期均不存在交互作用(P_(交互)>0.05),训练时间对逃避潜伏期主效应均显著(P_(时间)<0.05),组别对逃避潜伏期主效应均不显著(P_(组间)>0.05)。模型组术后3 d亚组逃避潜伏期高于对照组术后3 d亚组、电针组术后3 d亚组,穿越平台次数、目标象限停留时间低于对照组术后3 d亚组、电针组术后3 d亚组,电针组术后3 d亚组穿越平台次数低于对照组术后3 d亚组(P<0.05)。模型组术后7 d亚组逃避潜伏期高于对照组术后7 d亚组、电针组术后7 d亚组,穿越平台次数低于对照组术后7 d亚组,目标象限停留时间低于对照组术后7 d亚组、电针组术后7 d亚组(P<0.05)。模型组术后3 d亚组血清IL-6、TNF-α高于对照组术后3 d亚组、电针组术后3 d亚组,电针组术后3 d亚组TNF-α高于对照组术后3 d亚组,IL-10高于对照组术后3 d亚组、模型组术后3 d亚组(P<0.05)。模型组术后7 d亚组血清IL-6高于对照组术后7 d亚组,TNF-α高于对照组术后7 d亚组、电针组术后7 d亚组,电针组术后7 d亚组IL-10高于对照组术后7 d亚组、模型组术后7 d亚组(P<0.05)。模型组术后3 d亚组海马IL-6、TNF-α高于对照组术后3 d亚组、电针组术后3 d亚组,电针组术后3 d亚组IL-6、TNF-α高于对照组术后3 d亚组,IL-10高于对照组术后3 d亚组、模型组术后3 d亚组(P<0.05)。模型组术后7 d亚组海马IL-6、TNF-α高于对照组术后7 d亚组、电针组术后7 d亚组,电针组术后7 d亚组IL-10高于对照组术后7 d亚组、模型组术后7 d亚组(P<0.05)。模型组术后3 d亚组Fe^(2+)、LPO、ACSL4、LPCAT3高于对照组术后3 d亚组、电针组术后3 d亚组,电针组术后3 d亚组高于对照组术后3 d亚组,模型组术后3 d亚组FTH1低于对照组术后3 d亚组、电针组术后3 d亚组,电针组术后3 d亚组低于对照组术后3 d亚组(P<0.05)。模型组术后7 d亚组Fe^(2+)、LPO、ACSL4、LPCAT3高于对照组术后7 d亚组、电针组术后7 d亚组,FTH1低于术后7 d亚组、电针组术后7 d亚组(P<0.05)。模型组术后3、7 d亚组海马组织视野内细胞核双核膜结构清晰,核周隙未见明显增宽,形态不规则,表面凹凸不平;核内染色质浓缩边集;胞质内少量线粒体膜破裂,膜结构消失;部分内质网明显扩张;并可见部分髓鞘断裂,排列紊乱;电针组术后3、7 d亚组较模型组明显改善。结论炎性细胞因子失衡和神经元铁死亡可能是POCD发生的重要病因机制;电针能够改善POCD老年大鼠的学习记忆能力,其发挥脑保护作用机制可能与其调控全身和中枢炎性细胞因子水平以及神经元细胞铁死亡途径有关。

Effect of electroacupuncture at Neiguan(PC 6) and Baihui(GV 20) on CHOP and caspase-12 gene expressions in rats after ischemia-reperfusion injury

Objective： To investigate the effects of electroacupuncture （EA） at Neiguan （PC 6） and Baihui （GV 20） by observing the changes of CCAAT/enhancer-binding protein（C/EBP） homologous protein （CHOP） and caspase-12 gene expressions in rats after cerebral ischemia-reperfusion injury （IRI）, and explore whether the apoptosis pathway of endoplasmic reticulum stress （ERS） is involved in the protective mechanisms of EA. Methods： Sixty rats were randomly assigned to five groups （12 in each group）： a normal control group （group A）, a sham-operation group （group B）, an operation group （group C）, an Edaravone group （group D） and an EA group （group E）. The cerebral IRI rat model was induced by middle cerebral artery occlusion （MCAO） using intraluminal monofilament. 2,3,5-triphenyl tetrazolium chloride （TTC） staining was adopted in the measurement of cerebral infarction volume. Real-time polymerase chain reaction （RT-PCR） was used to determine the mRNA expressions of CHOP and caspase-12. Results： Compared with group A and group B, the volume of cerebral infarction and mRNA expressions of CHOP and caspase-12 in group C, group D and group E were increased, with statistical significances （P〈0.05 or P〈O.01）; compared with group C, the volume of cerebral infarction and mRNA expressions of CHOP and caspase-12 in group D and group E were decreased significantly （P〈0.05 or P〈0.01）; there were no significant differences between group D and group E in comparing the above items （P〉0.05）. Conclusion： EA at Neiguan （PC 6） and Baihui （GV 20） can effectively suppress the volume of cerebral infarction. Furthermore, the underlying mechanism of EA at Neiguan （PC 6） and Baihui （GV 20） is possibly related to the down-regulation of CHOP and caspase-12 mRNA expressions, so as to decrease cell apoptosis.