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- W4387563362 abstract "Acupuncture with low-frequency electrical stimulation (Acu-LFES) can attenuate muscle atrophy. Previous studies have found that Acu-LFES reduces the let-7 family in serum exosomes. This study explored the effects of let-7c-5p in chronic kidney disease (CKD) muscle atrophy.A total of 24 mice were randomly divided into control group, Acu-LFES group, CKD group, and CKD/Acu-LFES group (n = 6/group). The 5/6 nephrectomy was performed to establish the CKD model in mice. After 20 weeks, the Acu-LFES group and CKD/Acu-LFES group were treated with electroacupuncture at the Zu San Li and Yang Ling Quan bilaterally points for 15 minutes once. Surface sensing of translation (SUnSET), Reverse Transcription-quantitative PCR(RT-qPCR), immunofluorescence staining, and Western blot were performed to examine each group's state of protein production and myogenic differentiation. we knocked down or exogenously expressed let-7c-5p in C2C12 myoblast, RT-qPCR, and Western blot were performed to examine protein synthesis and myogenic differentiation.The protein expressions of MyoD and Myogenin (MyoG) were decreased in the CKD group (P = .029 and P = .026) concomitant with a decrease in the muscle fiber cross-sectional area. Acu-LFES prevented muscle atrophy in CKD mice. The protein expressions of MyoD and MyoG were increased in the CKD/Acu-LFES group (P = .006 and P = .001). In muscle of CKD mice, IGF1, IGF1R, IRS1, phosphorylated mTOR and P70S6K proteins were decreased compared with control muscle (P = .001, P = .007, P < .001, P < .001 and P < .001), whereas atrogin-1/MAFbx and MuRF1 were dramatically increased (P < .001). Acu-LFES reversed these phenomena, indicating IGF1/mTOR signaling pathway was induced to promote muscle protein synthesis and myogenic differentiation. Meanwhile, Acu-LFES caused a decrease of let-7c-5p in skeletal muscle of CKD mice (P = .034). Inhibiting let-7c-5p promoted C2C12 myogenic differentiation (P = .002 and P = .001) and increased IGF1, IGF1R, IRS1 levels while upregulating mTOR and P70S6K phosphorylation (P < .001, P = .002, P = .009, P < .001 and P = .007). It is interesting to observe that the abundance of atrogin-1/MAFbx and MuRF-1 was unaffected by let-7c-5p (P > .05).Acu-LFES-reduced expression of let-7c-5p can ameliorate CKD-induced skeletal muscle atrophy by upregulating the IGF1/mTOR signaling pathway, which enhances skeletal muscle protein synthesis and myogenic differentiation. Let-7c-5p may be a potential regulator for the treatment of muscle atrophy." @default.
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- W4387563362 date "2023-10-13" @default.
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- W4387563362 title "Electroacupuncture Promotes Skeletal Muscle Myogenic Differentiation and Protein Synthesis by Reducing Let-7c-5p Levels." @default.
- W4387563362 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/37820679" @default.
- W4387563362 hasPublicationYear "2023" @default.
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