Effects of electroacupuncture on gait and proliferation and differentiation of muscle satellite cell in rats with acute blunt trauma of gastrocnemius muscle
Jingjin Golumn|更新时间:2024-06-03
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Effects of electroacupuncture on gait and proliferation and differentiation of muscle satellite cell in rats with acute blunt trauma of gastrocnemius muscle
Chinese Acupuncture & MoxibustionVol. 43, Issue 9, Pages: 982-989(2023)
HUANG Yu-ting,CHEN Jia-yan,ZHENG Lin-yao,et al.Effects of electroacupuncture on gait and proliferation and differentiation of muscle satellite cell in rats with acute blunt trauma of gastrocnemius muscle[J].Chinese Acupuncture & Moxibustion,2023,43(09):982-989.
HUANG Yu-ting,CHEN Jia-yan,ZHENG Lin-yao,et al.Effects of electroacupuncture on gait and proliferation and differentiation of muscle satellite cell in rats with acute blunt trauma of gastrocnemius muscle[J].Chinese Acupuncture & Moxibustion,2023,43(09):982-989.DOI: 10.13703/j.0255-2930.20230327-k0003.
Effects of electroacupuncture on gait and proliferation and differentiation of muscle satellite cell in rats with acute blunt trauma of gastrocnemius muscle
To observe the effects of electroacupuncture on threshold of pain
gait
proliferation and differentiation of muscle satellite cell in rats with acute blunt trauma of gastrocnemius muscle
and to explore the possible mechanism of electroacupuncture in promoting the repair of acute injury of skeletal muscle.
Methods
2
A total of 48 SD rats were randomly divided into a blank group (6 rats)
a model group (24 rats) and an electroacupuncture group (18 rats). In the model group and the electroacupuncture group
the model of acute blunt trauma of gastrocnemius muscle was established by self-made impactor. In the electroacupuncture group
electroacupuncture was applied at "Chengshan" (BL 57) and "Yanglingquan" (GB 34) on the right side
with disperse-dense wave
in frequency of 2 Hz/100 Hz
once a day
30 min each time. Electroacupuncture intervention was performed for 3
7 and 14 days according to the sampling time. On the 1st
3rd
7th and 14th days after modeling
the mechanical withdrawal pain threshold of hindfoot was detected by Von Frey method; the standing time and the maximum contact area of the right hindfoot were recorded by Cat Walk XT
TM
animal gait analysis instrument; the morphology of the right gastrocnemius muscle and the number of inflammatory cells were observed by HE staining; the positive expression of paired box gene 7 (Pax7) and myogenic differentiation (MyoD) of the right gastrocnemius muscle was detected by immunofluorescence.
Results
2
After modeling
the muscle fiber rupture and massive infiltration of red blood cells and inflammatory cells were observed in the right gastrocnemius muscle; after electroacupuncture intervention
the morphology of muscle fiber was intact and the infiltration of inflammatory cells was improved. Compared with the blank group
in the model group
the differences of mechanical withdrawal pain threshold between the left and right foot were increased (
P
<
0.05)
the standing time was shortened and the maximum contact area of the right hindfoot was decreased (
P
<
0.05)
the number of inflammatory cells and the positive expression of Pax7 and MyoD of the right gastrocnemius muscle were increased (
P
<
0.05) on the 1st
3rd
7th and 14th
days after modeling. Compared with the model group
in the electroacupuncture group
the differences of mechanical withdrawal pain threshold were decreased (
P
<
0.05)
the standing time was prolonged (
P
<
0.05)
the number of inflammatory cells of right gastrocnemius muscle was decreased (
P
<
0.05) on the 7th and 14th days after modeling; the maximum contact area of the right hindfoot was increased (
P
<
0.05)
the positive expression of MyoD of the right gastrocnemius muscle was increased (
P
<
0.05) on the 3rd
7th and 14th days after modeling; the positive expression of Pax7 of the right gastrocnemius muscle was increased (
P
<
0.05) on the 3rd day after modeling.
Conclusion
2
Electroacupuncture can effectively improve the pain threshold and gait in rats with acute blunt trauma of gastrocnemius muscle
and promote the repair of skeletal muscle injury
the mechanism may be related to the up-regulation of Pax7 and MyoD
so as to promoting the proliferation and differentiation of muscle satellite cell.
关键词
Keywords
references
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