FOLLOWUS
1.Acupuncture and Tuina School, Chengdu University of Traditional Chinese Medicine, Chengdu (610075), China
2.School of Traditional Chinese Medicine, Jinan University, Guangzhou (510632), China
Dr. ZHANG Wei, E-mail: zhangwei@cdutcm.edu.cn
Published:2023-05,
Published Online:28 March 2023,
Accepted:11 November 2022
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WANG Lu, CHEN Ying, XU Ming-min, et al. Electroacupuncture Alleviates Functional Constipation in Mice by Activating Enteric Glial Cell Autophagy via PI3K/AKT/mTOR Signaling. [J]. Chinese Journal of Integrative Medicine 29(5):459-469(2023)
WANG Lu, CHEN Ying, XU Ming-min, et al. Electroacupuncture Alleviates Functional Constipation in Mice by Activating Enteric Glial Cell Autophagy via PI3K/AKT/mTOR Signaling. [J]. Chinese Journal of Integrative Medicine 29(5):459-469(2023) DOI: 10.1007/s11655-023-3594-3.
Objective:
2
To investigate autophagy-related mechanisms of electroacupuncture (EA) action in improving gastrointestinal motility in mice with functional constipation (FC).
Methods:
2
According to a random number table
the Kunming mice were divided into the normal control
FC and EA groups in Experiment Ⅰ. The autophagy inhibitor 3-methyladenine (3-MA) was used to observe whether it antagonized the effects of EA in Experiment Ⅱ. An FC model was established by diphenoxylate gavage. Then the mice were treated with EA stimulation at Tianshu (ST 25) and Shangjuxu (ST 37) acupoints. The first black stool defecation time
the number
weight
and water content of 8-h feces
and intestinal transit rate were used to assess intestinal transit. Colonic tissues underwent histopathological assessment
and the expressions of autophagy markers microtubule-associated protein 1 light chain 3 (LC3) and Beclin-1 were detected by immunohistochemical staining. The expressions of phosphoinositide 3-kinases (PI3K)-protein kinase B (AKT)-mammalian target of rapamycin (mTOR) signaling pathway members were investigated by Western blot and quantitative reverse transcription-polymerase chain reaction
respectively. The relationship between enteric glial cells (EGCs) and autophagy was observed by confocal immunofluorescence microscopy
localization analysis
and electron microscopy.
Results:
2
EA treatment shortened the first black stool defecation time
increased the number
weight
and water content of 8-h feces
and improved the intestinal transit rate in FC mice (
P
<
0.01). In terms of a putative autophagy mechanism
EA treatment promoted the expressions of LC3 and Beclin-1 proteins in the colonic tissue of FC mice (
P
<
0.05)
with glialfibrillary acidic protein (GFAP) and LC3 significantly colocalized. Furthermore
EA promoted colonic autophagy in FC mice by inhibiting PI3K/AKT/mTOR signaling (
P
<
0.05 or
P
<
0.01). The positive effect of EA on intestinal motility in FC mice was blocked by 3-MA.
Conclusion:
2
EA treatment can inhibit PI3K/AKT/mTOR signaling in the colonic tissues of FC mice
thereby promoting EGCs autophagy to improve intestinal motility.
electroacupuncturegastrointestinal motilityautophagyenteric glial cellsChinese medicine
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