Endogenous opioid peptides(EOP)are the neurochemical basis of the anesthetic and analgesic effects of acupuncture,and the quantity of acupuncture stimulus can be controlled accurately by using electroacupuncture(EA).T...
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Endogenous opioid peptides(EOP)are the neurochemical basis of the anesthetic and analgesic effects of acupuncture,and the quantity of acupuncture stimulus can be controlled accurately by using electroacupuncture(EA).The present study explores the dose-effect relationship between EA with different parameters and the regulation of EOP *** this paper,the intervention effects of EA on EOP system were specially discussed in terms of the single factor and the different combinations of the frequency,waveform and current *** study shows that EOP system presents a frequency-response *** low frequency of EA promotes the release of enkephalin,β-endorphin and endomorphin,the high one activates the dynorphin system selectively,and the intermediate frequency works on promoting the release of enkephalin andβ-endorphin,as well as ***-dense wave of EA may induce the release of enkephalin,β-endorphin,endomorphin and dynorphin,presenting a synergistic ***,the waveform of EA should be selected flexibly in clinical *** the better therapeutic effect can also be obtained with the continuous wave of *** system is involved in mediating appropriate intensity of EA,while the acupuncture effect generated by an extra strong EA stimulation refers to a kind of stress response of non-opioid *** different combinations of EA parameters result in various *** combination of EA parameters should be optimized in accordance with different diseases,which is valuable for guiding clinical practice and the development of EA therapy.
目的过观察密骨胶囊对骨质疏松大鼠骨形成标志物表达及细胞外调节蛋白激酶1(extracellular regulated protein kinase 1,ERK1)、p38丝裂原活化蛋白激酶(p38 mitogen-activated protein kinase,p38)表达,探讨密骨胶囊促骨形成的作用机制...
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目的过观察密骨胶囊对骨质疏松大鼠骨形成标志物表达及细胞外调节蛋白激酶1(extracellular regulated protein kinase 1,ERK1)、p38丝裂原活化蛋白激酶(p38 mitogen-activated protein kinase,p38)表达,探讨密骨胶囊促骨形成的作用机制。方法选取3月龄清洁级健康雌性Wistar大鼠,采用切除卵巢手术建立骨质疏松模型。模型成功后,将卵巢切除大鼠随机分为模型组(OVX)和密骨胶囊组,同时将假切大鼠作为对照组。显微CT(micro-CT)扫描分析大鼠胫骨体积骨密度和骨微结构参数;荧光定量PCR(real-time quantitative PCR,qPCR)方法检测骨内骨碱性磷酸酶(bone alkaline phosphatase,BALP)、骨形态发生蛋白-2(bone morphogenetic protein-2,BMP2)、Ⅰ型胶原a1(collagen typeⅠalpha 1,COL1a1)、ERK1和p38 mRNA表达。结果micro-CT结果显示,大鼠卵巢切除后,模型组体积骨密度、骨体积分数、骨小梁厚度和骨小梁数量均明显低于对照组(P<0.05),骨小梁分离度明显大于对照组(P<0.05);密骨胶囊组体积骨密度、骨体积分数和骨小梁厚度均明显增加(P<0.05),骨小梁数量增加,但与模型组比较无统计学意义。密骨胶囊可上调骨质疏松大鼠骨内骨形成标志物mRNA表达,包括BALP、BMP2、COL1α1,亦可上调股骨内ERK1和p38 mRNA的表达。结论密骨胶囊可以升高骨质疏松大鼠骨密度,改善部分骨微结构,上调骨形成标志物的表达,其作用机制可能与调控ERK1、p38表达有关。
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