AIM: To study the neural mechanism by which electroacupuncture(EA) at RN12(Zhongwan) and BL21(Weishu) regulates gastric motility.METHODS: One hundred and forty-four adult Sprague Dawley rats were studied in four separ...AIM: To study the neural mechanism by which electroacupuncture(EA) at RN12(Zhongwan) and BL21(Weishu) regulates gastric motility.METHODS: One hundred and forty-four adult Sprague Dawley rats were studied in four separate experiments. Intragastric pressure was measured using custommade rubber balloons, and extracellular neuron firing activity, which is sensitive to gastric distention in the dorsal vagal complex(DVC), was recorded by an electrophysiological technique. The expression levels of c-fos, motilin(MTL) and gastrin(GAS) in the paraventricular hypothalamic nucleus(PVN) were assayed by immunohistochemistry, and the expression levels of motilin receptor(MTL-R) and gastrin receptor(GAS-R) in both the PVN and the gastric antrum were assayed by western blotting.RESULTS: EA at RN12 + BL21(gastric Shu and Mu points), BL21(gastric Back-Shu point), RN12(gastric Front-Mu point), resulted in increased neuron-activating frequency in the DVC(2.08 ± 0.050, 1.17 ± 0.023, 1.55 ± 0.079 vs 0.75 ± 0.046, P < 0.001) compared with a model group. The expression of c-fos(36.24 ± 1.67, 29.41 ± 2.55, 31.79 ± 3.00 vs 5.73 ± 2.18, P < 0.001), MTL(22.48 ± 2.66, 20.76 ± 2.41, 19.17 ± 1.71 vs 11.68 ± 2.52, P < 0.001), GAS(24.99 ± 2.95, 21.69 ± 3.24, 23.03 ± 3.09 vs 12.53 ± 2.15, P < 0.001), MTL-R(1.39 ± 0.05, 1.22 ± 0.05, 1.17 ± 0.12 vs 0.84 ± 0.06, P < 0.001), and GAS-R(1.07 ± 0.07, 0.91 ± 0.06, 0.78 ± 0.05 vs 0.45 ± 0.04, P < 0.001) increased in the PVN after EA compared with the model group. The expression of MTL-R(1.46 ± 0.14, 1.26 ± 0.11, 0.99 ± 0.07 vs 0.65 ± 0.03, P < 0.001), and GAS-R(1.63 ± 0.11, 1.26 ± 0.16, 1.13 ± 0.02 vs 0.80 ± 0.11, P < 0.001) increased in the gastric antrum after EA compared with the model group. Damaging the PVN resulted in reduced intragastric pressure(13.67 ± 3.72 vs 4.27 ± 1.48, P < 0.001). These data demonstrate that the signals induced by EA stimulation of acupoints RN12 and BL21 are detectable in the DVC and the PVN, and increase the levels of gastrointestinal hormones and their receptors in the PVN and gastric antrum to regulate gastric motility. CONCLUSION: EA at RN12 and BL21 regulates gastric motility, which may be achieved through the PVN-DVCvagus-gastric neural pathway.展开更多
目的:研究电针胃俞募穴调节功能性消化不良(functional dyspepsia,FD)模型大鼠胃运动的中枢分子机制。方法:选用SD大鼠30只,随机分为空白组、模型组、中脘+胃俞组、胃俞组和中脘组5组,每组6只。除空白组外,其余大鼠均采用适度夹尾激怒...目的:研究电针胃俞募穴调节功能性消化不良(functional dyspepsia,FD)模型大鼠胃运动的中枢分子机制。方法:选用SD大鼠30只,随机分为空白组、模型组、中脘+胃俞组、胃俞组和中脘组5组,每组6只。除空白组外,其余大鼠均采用适度夹尾激怒法与不规则喂养法两种经典方法联合应用建立FD大鼠模型。中脘+胃俞组、胃俞组、中脘组相应选取"中脘"+"胃俞""胃俞""中脘"穴进行电刺激,每次20 min,每日1次,连续干预7 d。空白组与模型组不施加干预措施,模型组抓取固定。采用胃肠压力换能器记录大鼠胃窦部胃运动幅度及频率,Western blotting法测定大鼠迷走神经背核(dorsal motor nucleus of the vagus,DMV)区N-甲基-D-天冬氨酸受体(N-methyl-D-aspartate recepter,NMDAR)亚基NR1表达,酶联免疫吸附法(ELISA)法检测各组大鼠血清一氧化氮(nitric oxide,NO)含量。结果:与空白组比较,模型组胃窦运动幅度降低,DMV区NR1表达降低,血清NO含量增高(均P<0.05);与模型组比较,电针各组胃窦运动幅度增高,DMV区NR1表达增高,血清NO含量降低(均P<0.05);与中脘组、胃俞组比较,中脘+胃俞组胃窦运动幅度、DMV区NR1表达均增高(均P<0.05);与中脘+胃俞组、中脘组比较,胃俞组NO含量降低(均P<0.05)。模型组和空白组、电针各组胃窦运动频率组间比较差异无统计学意义(均P>0.05)。结论:电针胃俞募穴能够调节FD模型大鼠胃运动,可能是通过改变中枢DMV区NMDAR活性从而调节血清NO含量发挥作用的。展开更多
基金Supported by The National Nature Science Foundation Council of ChinaNo.81473784+3 种基金the Natural Science Foundation of Anhui ProvinceNo.1408085MH166the Natural Science Foundation of Anhui University of Traditional Chinese MedicineNo.2013qn002
文摘AIM: To study the neural mechanism by which electroacupuncture(EA) at RN12(Zhongwan) and BL21(Weishu) regulates gastric motility.METHODS: One hundred and forty-four adult Sprague Dawley rats were studied in four separate experiments. Intragastric pressure was measured using custommade rubber balloons, and extracellular neuron firing activity, which is sensitive to gastric distention in the dorsal vagal complex(DVC), was recorded by an electrophysiological technique. The expression levels of c-fos, motilin(MTL) and gastrin(GAS) in the paraventricular hypothalamic nucleus(PVN) were assayed by immunohistochemistry, and the expression levels of motilin receptor(MTL-R) and gastrin receptor(GAS-R) in both the PVN and the gastric antrum were assayed by western blotting.RESULTS: EA at RN12 + BL21(gastric Shu and Mu points), BL21(gastric Back-Shu point), RN12(gastric Front-Mu point), resulted in increased neuron-activating frequency in the DVC(2.08 ± 0.050, 1.17 ± 0.023, 1.55 ± 0.079 vs 0.75 ± 0.046, P < 0.001) compared with a model group. The expression of c-fos(36.24 ± 1.67, 29.41 ± 2.55, 31.79 ± 3.00 vs 5.73 ± 2.18, P < 0.001), MTL(22.48 ± 2.66, 20.76 ± 2.41, 19.17 ± 1.71 vs 11.68 ± 2.52, P < 0.001), GAS(24.99 ± 2.95, 21.69 ± 3.24, 23.03 ± 3.09 vs 12.53 ± 2.15, P < 0.001), MTL-R(1.39 ± 0.05, 1.22 ± 0.05, 1.17 ± 0.12 vs 0.84 ± 0.06, P < 0.001), and GAS-R(1.07 ± 0.07, 0.91 ± 0.06, 0.78 ± 0.05 vs 0.45 ± 0.04, P < 0.001) increased in the PVN after EA compared with the model group. The expression of MTL-R(1.46 ± 0.14, 1.26 ± 0.11, 0.99 ± 0.07 vs 0.65 ± 0.03, P < 0.001), and GAS-R(1.63 ± 0.11, 1.26 ± 0.16, 1.13 ± 0.02 vs 0.80 ± 0.11, P < 0.001) increased in the gastric antrum after EA compared with the model group. Damaging the PVN resulted in reduced intragastric pressure(13.67 ± 3.72 vs 4.27 ± 1.48, P < 0.001). These data demonstrate that the signals induced by EA stimulation of acupoints RN12 and BL21 are detectable in the DVC and the PVN, and increase the levels of gastrointestinal hormones and their receptors in the PVN and gastric antrum to regulate gastric motility. CONCLUSION: EA at RN12 and BL21 regulates gastric motility, which may be achieved through the PVN-DVCvagus-gastric neural pathway.
文摘目的:研究电针胃俞募穴调节功能性消化不良(functional dyspepsia,FD)模型大鼠胃运动的中枢分子机制。方法:选用SD大鼠30只,随机分为空白组、模型组、中脘+胃俞组、胃俞组和中脘组5组,每组6只。除空白组外,其余大鼠均采用适度夹尾激怒法与不规则喂养法两种经典方法联合应用建立FD大鼠模型。中脘+胃俞组、胃俞组、中脘组相应选取"中脘"+"胃俞""胃俞""中脘"穴进行电刺激,每次20 min,每日1次,连续干预7 d。空白组与模型组不施加干预措施,模型组抓取固定。采用胃肠压力换能器记录大鼠胃窦部胃运动幅度及频率,Western blotting法测定大鼠迷走神经背核(dorsal motor nucleus of the vagus,DMV)区N-甲基-D-天冬氨酸受体(N-methyl-D-aspartate recepter,NMDAR)亚基NR1表达,酶联免疫吸附法(ELISA)法检测各组大鼠血清一氧化氮(nitric oxide,NO)含量。结果:与空白组比较,模型组胃窦运动幅度降低,DMV区NR1表达降低,血清NO含量增高(均P<0.05);与模型组比较,电针各组胃窦运动幅度增高,DMV区NR1表达增高,血清NO含量降低(均P<0.05);与中脘组、胃俞组比较,中脘+胃俞组胃窦运动幅度、DMV区NR1表达均增高(均P<0.05);与中脘+胃俞组、中脘组比较,胃俞组NO含量降低(均P<0.05)。模型组和空白组、电针各组胃窦运动频率组间比较差异无统计学意义(均P>0.05)。结论:电针胃俞募穴能够调节FD模型大鼠胃运动,可能是通过改变中枢DMV区NMDAR活性从而调节血清NO含量发挥作用的。
基金国家自然科学基金项目:8147378481774414+2 种基金安徽省高校自然科学研究重点项目:KJ 2017 A 298安徽省高校优秀青年人才支持计划重点项目:gxyq ZD 2016134安徽高校科研创新平台建设项目:2015 TD 033
文摘目的:观察胃俞募配穴针刺与胃俞、中脘单穴针刺对胃扩张受试者静息态脑功能局部一致性(regional homogeneity,ReHo)的影响及其与胃运动变化的相关性,探讨胃俞募配穴的中枢整合机制。方法:采用交叉试验设计,将24例健康受试者分3次先后纳入胃俞组、中脘组和胃俞配伍中脘组(配穴组),每次每组纳入8例,每组共纳入24例受试者,在水负荷胃扩张状态下分别接受胃俞穴、中脘穴和胃俞配伍中脘穴针刺,每次针刺前后分别进行胃电图检测和静息态脑功能磁共振成像(functional magnetic resonance imaging,fMRI)扫描,对针刺前后胃运动变化情况进行分析,对采集的fMRI图像均进行ReHo值计算,分析比较各组针刺前后和各组间ReHo变化;对针刺前后胃运动情况和ReHo变化进行相关性分析。结果:(1)针刺后,各组受试者胃电图振幅均明显低于针刺前(均P<0.01),胃电图频率均较治疗前差异无统计学意义(均P>0.05),胃俞组及中脘组胃电图振幅均高于配穴组(均P<0.05)。(2)与针刺前比较,胃俞募配穴针刺及胃俞、中脘单穴针刺引起了不同的大脑ReHo变化;胃俞募配穴针刺可引起右颞下回、左侧丘脑、楔前叶、后扣带回ReHo显著增高(均P<0.05),右侧颞极颞中回、距状沟、楔前叶ReHo明显减低(均P<0.05)。与单穴组比较,胃俞募配穴针刺均引起了后扣带回ReHo值增高和颞极ReHo值减低(均P<0.05)。(3)相关性分析显示,配穴组后扣带回、丘脑、楔前叶ReHo变化与胃运动振幅变化呈正相关,颞极ReHo变化与胃运动振幅变化呈负相关。结论:胃俞募配穴针刺及胃俞、中脘单穴针刺引起了不同的脑区ReHo变化。胃俞募配穴较单穴针刺可引起某些新的脑区ReHo变化,丘脑、后扣带回、楔前叶等脑区可能是胃俞募配穴针刺调节胃运动效应的重点整合脑区。胃俞募配穴针刺对胃运动的调节作用与丘脑、边缘系统和默认网络部分脑区密切相关。
