电针“天枢”对链脲佐菌素诱导的2型糖尿病大鼠不同肠段氮能神经元的调节效应

张双双; 徐天成; 余芝; 冒金锋; 徐斌

doi:10.13702/j.1000-0607.20210628

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电针“天枢”对链脲佐菌素诱导的2型糖尿病大鼠不同肠段氮能神经元的调节效应

机制探讨 | 更新时间：2023-08-11

- 电针“天枢”对链脲佐菌素诱导的2型糖尿病大鼠不同肠段氮能神经元的调节效应
- Effect of electroacupuncture at “Tianshu” (ST25) on the regulation of nitrergic neurons in different intestinal segments in streptozotocin induced type 2 diabetic rats
- 针刺研究 2022年47卷第9期页码：785-792
- 作者机构：
  
  1. 南京中医药大学针药结合教育部重点实验室
  2. 南京中医药大学第二附属医院江苏省第二中医院
- 作者简介：
- 基金信息：
  
  国家自然科学基金项目(No.81873238、82074532、81673883);江苏省第二批中医药领军人才项目(No.SLJ0225);南京中医药大学中医学优势学科三期项目立项开放课题(No.ZYX03KF012)
- DOI：10.13702/j.1000-0607.20210628
  中图分类号：
- 纸质出版日期：2022
- 稿件说明：
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张双双, 徐天成, 余芝, 等. 电针“天枢”对链脲佐菌素诱导的2型糖尿病大鼠不同肠段氮能神经元的调节效应[J]. 针刺研究, 2022,47(9):785-792.

ZHANG Shuang-shuang, XU Tian-cheng, YU Zhi, et al. Effect of electroacupuncture at “Tianshu” (ST25) on the regulation of nitrergic neurons in different intestinal segments in streptozotocin induced type 2 diabetic rats[J]. Acupuncture research, 2022, 47(9): 785-792.
张双双, 徐天成, 余芝, 等. 电针“天枢”对链脲佐菌素诱导的2型糖尿病大鼠不同肠段氮能神经元的调节效应[J]. 针刺研究, 2022,47(9):785-792. DOI： 10.13702/j.1000-0607.20210628.

ZHANG Shuang-shuang, XU Tian-cheng, YU Zhi, et al. Effect of electroacupuncture at “Tianshu” (ST25) on the regulation of nitrergic neurons in different intestinal segments in streptozotocin induced type 2 diabetic rats[J]. Acupuncture research, 2022, 47(9): 785-792. DOI： 10.13702/j.1000-0607.20210628.

摘要

目的:观察电针“天枢”对2型糖尿病大鼠空肠及远端结肠氮能神经元的影响，探讨电针对2型糖尿病大鼠不同肠段的局部调节机制。方法:SD大鼠随机分为正常组、模型组、电针组，每组8只。采用高脂高糖饮食联合链脲佐菌素诱导2型糖尿病大鼠模型。电针组予“天枢”电针治疗，20 min/次，每日1次，每周6 d

共治疗4周。通过观察大鼠首粒红便排出时间、远端结肠排珠时间，评估肠运动情况；采用苏木精-伊红染色法观察大鼠空肠及远端结肠组织形态变化；免疫荧光法及Western blot法检测大鼠空肠及远端结肠中肠总神经元标志物蛋白基因产物(PGP)9.5、氮能神经元标志物神经型一氧化氮合酶(nNOS)的阳性表达及蛋白表达量。结果:与正常组比较，模型组大鼠随机血糖、空腹血糖水平明显升高(P<0.01)

首粒红便排出时间、远端结肠排珠时间均缩短(P<0.01)

空肠及远端结肠组织中PGP9.5、nNOS的表达水平均降低(P<0.01)。与模型组比较，电针组大鼠随机血糖、空腹血糖水平明显降低(P<0.01)

首粒红便排出时间、远端结肠排珠时间均延长(P<0.01

P<0.05)

空肠及远端结肠组织中PGP9.5、nNOS表达水平均升高(P<0.05

P<0.01)。光镜下正常组大鼠空肠组织肠黏膜结构完整，杯状细胞清晰可见，腺体排列整齐；模型组大鼠空肠及远端结肠肠黏膜结构紊乱，杯状细胞数量减少，腺体数量减少、排列杂乱；电针组空肠和远端结肠肠黏膜破坏程度减轻，杯状细胞数量增加，肠黏膜腺体排列较整齐、结构完整。结论:电针可通过调节肠神经系统中氮能神经元的数量，有效改善2型糖尿病大鼠肠道黏膜损伤，恢复肠运动功能。

Abstract

Objective To observe the effect of electroacupuncture(EA) at “Tianshu”(ST25) on nitrergic neurons in jejunum and distal colon in type 2 diabetic rats

so as to explore its mechanism of regulating different intestinal segments. Methods Twenty-four SD rats were randomly divided into control

model and EA groups(n=8 in each group). The diabetes model was established by intraperitoneal injection of streptozotocin(35 mg/kg) and high-sugar and high-fat diet for 2 weeks. EA(2 Hz/15 Hz

2 mA) was applied to bilateral ST25 for 20 min

once a day

6 days a week for 4 weeks. The intestinal motility was evaluated by observing the first red stool excretion time and the distal colon bead excretion time. HE staining was used to observe the histological changes of jejunum and distal colon. The positive expression and protein expression of intestinal total neuronal marker protein gene product 9.5(PGP9.5) and neuronal nitric oxide synthase(nNOS) in jejunum and distal colon were detected by immunofluorescence staining and Western blot

respectively. Results After modeling

the blood glucose was significantly increased(P<0.01)

the first red stool excretion time and the distal colon bead excretion time were shortened(P<0.01)

the expression levels of PGP9.5 and nNOS in jejunum and distal colon were decreased(P<0.01) in the model group relevant to the control group. After treatment

compared with the model group

the blood glucose was decreased(P<0.01)

the first red stool excretion time and the distal colon bead excretion time were prolonged(P<0.01

P<0.05)

and the expression levels of PGP9.5 and nNOS in jejunum and distal colon were increased(P<0.05

P<0.01) in the EA group. HE staining showed disordered structure in intestinal mucosa of the jejunum and distal colon

and reduction of the number of goblet cells in the model group

which was relatively milder in the EA group. Conclusion EA can effectively improve the intestinal mucosal damage and restore intestinal motor function in type 2 diabetic rats

which may be related to its function in regulating the number of nitrergic neurons in the intestinal nervous system.

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