目的:通过比较针刺不同腧穴对失眠大鼠脑内γ-氨基丁酸(gamma-aminobutyric acid,GABA)和γ-氨基丁酸A受体(gamma-aminobutyric acid A receptor,GABAAR)阳性表达的影响,探讨针刺不同腧穴对失眠大鼠脑内神经递质的调整作用。方法:将70...目的:通过比较针刺不同腧穴对失眠大鼠脑内γ-氨基丁酸(gamma-aminobutyric acid,GABA)和γ-氨基丁酸A受体(gamma-aminobutyric acid A receptor,GABAAR)阳性表达的影响,探讨针刺不同腧穴对失眠大鼠脑内神经递质的调整作用。方法:将70只大鼠随机分为模型对照组、空白对照组、"神门"组、"内关"组、"三阴交"组、"足三里"组、"申脉-照海"组,每组10只。大鼠腹腔注射氯苯丙氨酸制造失眠模型,各治疗组针刺相应腧穴。用免疫组织化学法检测大鼠下丘脑GABA、GABAAR的阳性细胞数。结果:同空白对照组比较,模型对照组GABA、GABAAR阳性细胞数及爬竿时间明显下降(P<0.05)。与模型对照组比较,各针刺组大鼠下丘脑内GABA和GABAAR阳性细胞数量增多,同时爬竿时间延长(P<0.05)。各针刺组之间比较,"申脉-照海"组和"神门"组的疗效明显高于"足三里"组、"三阴交"组和"内关"组(P<0.05)。结论:针刺"申脉-照海""神门""内关""足三里"和"三阴交"均可提高下丘脑GABA和GABAAR,针刺可能通过此作用起到安神镇静的作用,改善机体免疫能力,达到治疗失眠的目的。治疗失眠常用穴申脉、照海和神门的调整作用较好。展开更多
Muscarinic receptors and nicotine receptors can increase free calcium ion levels in the facial nucleus via different channels following facial nerve injury. In addition, γ-aminobutyric acid A （GABAA） receptors have...Muscarinic receptors and nicotine receptors can increase free calcium ion levels in the facial nucleus via different channels following facial nerve injury. In addition, γ-aminobutyric acid A （GABAA） receptors have been shown to negatively regulate free calcium ion levels in the facial nucleus by inhibiting nicotine receptors. The present study investigated the influence of GABAA, γ-aminobutyric acid B （GABAB） and C （GABAc） receptors on muscarinic receptors in rats with facial nerve injury by confocal laser microscopy. GABAA and GABAB receptors exhibited significant dose-dependent inhibitory effects on increased muscarinic receptor-mediated free calcium ion levels following facial nerve injury. Results showed that GABAA and GABAB receptors negatively regulate muscarinic receptor effects and interplay with cholinergic receptors to regulate free calcium ion levels for facial neural regeneration.展开更多
文摘目的:通过比较针刺不同腧穴对失眠大鼠脑内γ-氨基丁酸(gamma-aminobutyric acid,GABA)和γ-氨基丁酸A受体(gamma-aminobutyric acid A receptor,GABAAR)阳性表达的影响,探讨针刺不同腧穴对失眠大鼠脑内神经递质的调整作用。方法:将70只大鼠随机分为模型对照组、空白对照组、"神门"组、"内关"组、"三阴交"组、"足三里"组、"申脉-照海"组,每组10只。大鼠腹腔注射氯苯丙氨酸制造失眠模型,各治疗组针刺相应腧穴。用免疫组织化学法检测大鼠下丘脑GABA、GABAAR的阳性细胞数。结果:同空白对照组比较,模型对照组GABA、GABAAR阳性细胞数及爬竿时间明显下降(P<0.05)。与模型对照组比较,各针刺组大鼠下丘脑内GABA和GABAAR阳性细胞数量增多,同时爬竿时间延长(P<0.05)。各针刺组之间比较,"申脉-照海"组和"神门"组的疗效明显高于"足三里"组、"三阴交"组和"内关"组(P<0.05)。结论:针刺"申脉-照海""神门""内关""足三里"和"三阴交"均可提高下丘脑GABA和GABAAR,针刺可能通过此作用起到安神镇静的作用,改善机体免疫能力,达到治疗失眠的目的。治疗失眠常用穴申脉、照海和神门的调整作用较好。
文摘利用荧光标记法及分子模拟法,研究了氟虫腈与昆虫γ-氨基丁酸(aminobutyric acid,GABA)受体的相互作用。荧光标记试验结果显示,氟虫腈与家蝇脑内GABA受体有较强的相互作用,其最大结合量[RT]值和亲和常数K_d值分别为(21.3±2.5)pmol/mg protein和(109±9)nmol/L。分子模拟结果显示:氟虫腈与果蝇RDL受体间形成3条氢键;两者之间的CDOCKER的相互作用能为–137.93 k J/mol。试验和理论两方面均证实,氟虫腈对昆虫GABA受体的强亲和性是导致氟虫腈对昆虫产生高毒性的重要原因。
基金the Youth Research Foundation of Qingdao University, No. 2007
文摘Muscarinic receptors and nicotine receptors can increase free calcium ion levels in the facial nucleus via different channels following facial nerve injury. In addition, γ-aminobutyric acid A （GABAA） receptors have been shown to negatively regulate free calcium ion levels in the facial nucleus by inhibiting nicotine receptors. The present study investigated the influence of GABAA, γ-aminobutyric acid B （GABAB） and C （GABAc） receptors on muscarinic receptors in rats with facial nerve injury by confocal laser microscopy. GABAA and GABAB receptors exhibited significant dose-dependent inhibitory effects on increased muscarinic receptor-mediated free calcium ion levels following facial nerve injury. Results showed that GABAA and GABAB receptors negatively regulate muscarinic receptor effects and interplay with cholinergic receptors to regulate free calcium ion levels for facial neural regeneration.
