耳电针对链脲佐菌素致糖尿病大鼠胃窦Cajal间质细胞的修复效应
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国家自然科学基金(81503641);江苏省中医药科技项目(YB2017089);江苏省“六大人才高峰”高层次人才C类资助项目(2016?WSN?094)


Repairment effect of auricular electro⁃acupuncture on interstitial cells of Cajal in streptozotocin⁃induced diabetic rats
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    摘要:

    目的:观察低频电针耳穴“胃”对链脲佐菌素(streptozotocin,STZ)致糖尿病大鼠胃窦病理形态、Cajal间质细胞(interstitial cells of Cajal,ICC)、血清胃促生长素(Ghrelin)和血管活性肠肽(vasoactive intestinal peptide,VIP)浓度的影响。方法:24只雄性SD大鼠随机分为模型组、假耳针组、耳针组,每组各8只,腹腔注射STZ(55 mg/kg)诱导糖尿病大鼠模型,造模后第8周假耳针组取耳垂,耳针组取耳穴“胃”进行电针治疗(2 Hz,20 min/次,每天1次,1周5 d,连续2周),模型组无治疗。比较治疗前、后各组大鼠空腹血清Ghrelin、VIP浓度的改变,治疗结束后取胃窦组织行HE染色、c-Kit免疫组化染色,以及Western blot检测胃窦组织c-Kit蛋白表达水平。结果:治疗后,耳针组血清Ghrelin浓度较治疗前显著上升(P<0.05),且高于模型组(P<0.05);免疫组化及Western blot结果均显示耳针组胃窦c-Kit蛋白的表达均显著高于模型组与假耳针组(P均<0.01)。结论:电针耳穴“胃”能够促进糖尿病大鼠胃窦ICC的修复,可能与上调血清Ghrelin有关。

    Abstract:

    Objective:This study aims to observe the effects of low-frequency electro-acupuncture(EA)auricular acupoint “stomach” on gastric antrum pathological morphology,interstitial cells of Cajal(ICC),and serum levels of ghrelin and vasoactive intestinal peptide(VIP)in streptozotocin(STZ)-induced diabetic rats. Methods:Tweenty-four male Sprague-Dawley(SD)rats were randomly divided into model group,sham auricular acupuncture group and auricular acupuncture group,8 rats in each group. All of the rats were injected with STZ(55 mg/kg)to induce diabetic model,at the end of the 8th week after injection,animals received 2 weeks-treatment(20 min per time,5 days a week,10 times)respectively:model group(no stimulation),sham auricular acupuncture group(2 Hz EA on earlobes),auricular acupuncture group(2 Hz EA on ear point”stomach”). Serum level of Ghrelin and vasoactive intestinal peptide(VIP) were detected before and after EA treatments. At the end point of the experiment,pathological morphology in antrum was observed by hematoxylin-eosin staining. C-Kit expression of ICCs in antrum were analyzed by immunohistochemistry and Western blot. Results:Serum level of ghrelin in auricular acupuncture group was increased after EA treatments(P<0.05). Compared to model group,serum level of ghrelin in auricular acupuncture group was significantly higher at the 10th week after STZ injection(P<0.05). C-Kit expression of ICCs in antrum of auricular acupuncture group was higher than that in model group and sham auricular acupuncture group(P<0.01). Conclusion:Low-frequency EA on ear “stomach” point can promote the repair of ICCs in diabetic rats,which may be related to up-regulation of serum ghrelin.

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陈 欢,周静珠,朱伟坚,樊锦青,卢 静,张朝晖.耳电针对链脲佐菌素致糖尿病大鼠胃窦Cajal间质细胞的修复效应[J].南京医科大学学报(自然科学版),2020,(3):380-384

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  • 收稿日期:2019-09-03
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  • 在线发布日期: 2020-03-30
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