Effect of acupuncture pretreatment on inflammatory response of exercise-induced skeletal muscle damage in rats based on TLR9/MyD88/NF-κB signaling pathwayZHOU Rongjie1△, GAO Ming1✉, LI Hui1, GUO Yulin1, XU Gang1, ZHAO Yuan2, TANG Wenchao1, WEN Junling1, LI Shaoxiong1 (1College of Acupuncture-Moxibustion and Tuina, 2Science and Technology Experimental Center, Shanghai University of TCM, Shanghai 201203, China)

ZHOU Rongjie; GAO Ming; LI Hui; GUO Yulin; XU Gang; ZHAO Yuan; TANG Wenchao; WEN Junling; LI Shaoxiong

doi:10.13703/j.0255-2930.20230329-k0013

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Effect of acupuncture pretreatment on inflammatory response of exercise-induced skeletal muscle damage in rats based on TLR9/MyD88/NF-κB signaling pathwayZHOU Rongjie^1△, GAO Ming^1✉, LI Hui¹, GUO Yulin¹, XU Gang¹, ZHAO Yuan², TANG Wenchao¹, WEN Junling¹, LI Shaoxiong¹ (¹College of Acupuncture-Moxibustion and Tuina, ²Science and Technology Experimental Center, Shanghai University of TCM, Shanghai 201203, China)

Study on Mechanism | 更新时间：2024-06-03

- Effect of acupuncture pretreatment on inflammatory response of exercise-induced skeletal muscle damage in rats based on TLR9/MyD88/NF-κB signaling pathwayZHOU Rongjie^1△, GAO Ming^1✉, LI Hui¹, GUO Yulin¹, XU Gang¹, ZHAO Yuan², TANG Wenchao¹, WEN Junling¹, LI Shaoxiong¹ (¹College of Acupuncture-Moxibustion and Tuina, ²Science and Technology Experimental Center, Shanghai University of TCM, Shanghai 201203, China)
- Chinese Acupuncture & Moxibustion Vol. 44, Issue 1, Pages: 78-86(2024)
- 作者机构：
  
  1.上海中医药大学，针灸推拿学院，上海 201203
  2.上海中医药大学，科技实验中心，上海 201203
- 作者简介：
- 基金信息：
- DOI：10.13703/j.0255-2930.20230329-k0013
  CLC：
- Received：29 March 2023，
  
  Online First：22 August 2023，
  
  Published：12 January 2024
- 稿件说明：
移动端阅览
周荣杰，高明，李慧，等.基于TLR9/MyD88/NFκB信号通路探讨针刺预处理对运动性骨骼肌损伤大鼠炎性反应的影响［J］.中国针灸，2023，44（1）：78-86.

.Effect of acupuncture pretreatment on inflammatory response of exercise-induced skeletal muscle damage in rats based on TLR9/MyD88/NF-κB signaling pathway[J].Chinese Acupuncture & Moxibustion,2024,44(01):78-86.
周荣杰，高明，李慧，等.基于TLR9/MyD88/NFκB信号通路探讨针刺预处理对运动性骨骼肌损伤大鼠炎性反应的影响［J］.中国针灸，2023，44（1）：78-86. DOI： 10.13703/j.0255-2930.20230329-k0013.

.Effect of acupuncture pretreatment on inflammatory response of exercise-induced skeletal muscle damage in rats based on TLR9/MyD88/NF-κB signaling pathway[J].Chinese Acupuncture & Moxibustion,2024,44(01):78-86. DOI： 10.13703/j.0255-2930.20230329-k0013.

摘要

目的

观察针刺预处理对运动性骨骼肌损伤（EIMD）大鼠toll样受体9/髓样分化蛋白88/核因子-κB（TLR9/MyD88/NFκB）信号通路及炎性反应的影响，探讨针刺预处理干预EIMD的作用机制。

方法

将88只雄性SD大鼠随机分为空白组（8只）、模型组（40只）和针刺预处理组（40只）。模型组及针刺预处理组随机分为造模后0、12、24、48、72 h 5个亚组，每亚组8只。造模前，针刺预处理组于双侧“足三里”及“关元”行针刺干预，每次20 min，每日1次，连续干预7 d。模型组和针刺预处理组采用动物实验跑台进行1次间歇性下坡跑离心运动，建立EIMD模型。透射电镜观察大鼠腓肠肌超微结构；ELISA法检测大鼠血清白细胞介素（IL）6、肿瘤坏死因子α（TNFα）含量；Western blot法及实时荧光定量PCR法检测大鼠腓肠肌组织TLR9、MyD88、NFκB p65 蛋白及mRNA表达。

结果

与空白组比较，模型组大鼠各时点腓肠肌超微结构呈现不同程度损伤，肌丝紊乱、扭曲，线粒体明显肿胀，部分线粒体嵴缺损；与模型组比较，针刺预处理组损伤较轻，肌纤维大多排列整齐，线粒体数量明显增多。与空白组比较，模型组大鼠造模后0、12、24、48 h血清IL6含量升高（

0.01），造模后各时点血清TNFα含量升高（

0.05，

0.01）；与模型组同时点比较，针刺预处理组大鼠造模后12、24、48 h血清IL6含量降低（

0.01，

0.05），造模后24、48、72 h血清TNFα含量降低（

0.01）。模型组和针刺预处理组血清IL6、TNFα含量整体均呈现先升高后下降的趋势。与空白组比较，模型组大鼠造模后12、24、48、72 h腓肠肌组织TLR9、NF-κB p65蛋白及mRNA表达增加（

0.01，

0.05），造模后各时点腓肠肌组织MyD88蛋白及mRNA表达增加（

0.05，

0.01）；与模型组同时点比较，针刺预处理组造模后12、24、48、72 h腓肠肌组织TLR9蛋白表达减少（

0.05，

0.01），造模后24、48、72 h腓肠肌组织TLR9 mRNA表达减少（

0.01，

0.05），造模后24、48、72 h腓肠肌组织MyD88蛋白及mRNA表达减少（

0.01，

0.05），造模后24、48 h腓肠肌组织NFκB p65蛋白及mRNA表达减少（

0.01）。模型组和针刺预处理组腓肠肌组织TLR9、MyD88、NF-κB p65蛋白及mRNA表达量整体均呈现先升高后下降的趋势。

结论

针刺预处理可以减轻运动性骨骼肌损伤，其作用机制可能与调控TLR9/MyD88/NFκB信号通路表达从而抑制炎性反应有关。

Abstract

Objective

To observe the effects of acupuncture pretreatment on toll-like receptor 9/myeloid differentiation factor 88/nuclear factor-κB (TLR9/MyD88/NF-κB) signaling pathway and inflammatory response in the rats with exercise-induced skeletal muscle damage (EIMD) and explore the underlying mechanism of this pretreatment for EIMD.

Methods

A total of 88 male SD rats were randomly divided into a blank group (8 rats)

a model group (40 rats) and an acupuncture pretreatment group (40 rats). In the model group and the acupuncture pretreatment group

5 subgroups were randomized according to the sampling time of 0

48 and 72 h of modeling

with 8 rats in each one

respectively. Before modeling

in the acupuncture pretreatment group

acupuncture was delivered at bilateral "Zusanli" (ST 36) and "Guanyuan" (CV 4) for 20 min

once daily for consecutive 7 days. By one-time intermittent downhill centrifugal exercise on animal experimental treadmill

EIMD model was established in the model group and the acupuncture pretreatment group. The ultrastructure of gastrocnemius muscle was observed under transmission electron microscope. The levels of interleukin-6 (IL-6) and tumor necrosis factor-α (TNF-α) in the serum were detected by ELISA. The protein and mRNA expression of TLR9

MyD88 and NF-κB p65 in the gastrocnemius tissue of rats was detected by the Western blot and real-time PCR

respectively.

Results

Compared with the blank group

the gastrocnemius ultrastructure in the model group showed the damage of different degrees

with myofilaments disarranged and twisted

mitochondria obviously swollen and mitochondrial crista partially defected. Compared with the model group

the injury was mild

most of muscle fibers were arranged neatly and the number of mitochondria increased remarkably in the acupuncture pretreatment group. Compared with the blank group

in the model group

the serum IL-6 levels increased at 0

24 and 48 h after modeling in the rats (

0.01)

and TNF-α levels were elevated at each time point after modeling (

0.05

0.01). In the acupuncture pretreatment group

the serum IL-6 levels were reduced at 12

24 and 48 h after modeling (

0.01

0.05)

and the TNF-α levels decreased at 24

48 and 72 h after modeling (

0.01) when compared with those in the model group at the same time points separately. The serum IL-6 and TNF-α levels ascende

d and then tended to decline in the model group and the acupuncture pretreatment group. Compared with the blank group

the protein and mRNA expression of TLR9 and NF-κB p65 in the gastrocnemius tissue increased at 12

48 and 72 h after modeling (

0.01

0.05)

and the protein and mRNA expression levels of MyD88 in the gastrocnemius tissue at each time point after modeling were elevated (

0.05

0.01) in the model group. When compared with the model group at the same time points

in the acupuncture pretreatment group

the protein expression of TLR9 in the gastrocnemius tissue decreased at 12

48 and 72 h after modeling (

0.05

0.01)

and the mRNA expression of TLR9 was declined at 24

48 and 72 h after modeling (

0.01

0.05); the protein and mRNA expression of MyD88 in the gastrocnemius decreased at 24

48 and 72 h after modeling (

0.01

0.05)

and that of NF-κB p65 was reduced at 24 h and 48 h after modeling (

0.01). The protein and mRNA expression of TLR9

MyD88 and NF-κB p65 in the gastrocnemius tissue showed a trend of decrease after increase in the model group and the acupuncture pretreatment group.

Conclusion

Acupuncture pretreatment can alleviate exercise-induced skeletal muscle damage

which may be related to modulating the expression of TLR9/MyD88/NF-κB signaling pathway to inhibit the inflammatory response.

关键词

Keywords

references

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Related Institution

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⁰

DOI：10.13703/j.0255-2930.20230329-k0013

摘要

Abstract

关键词

Keywords

references