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Needling on trigger point promotes muscle regeneration after bupivacaine injection induced injury.

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Needling on trigger point promotes muscle regeneration after bupivacaine injection induced injury.

Neurosci Lett. 2020 Oct 22;739:135436

Authors: Chen J, Li W, Huang Y, Zhang L, Gan X, Zhang R, He Y, Lu M, Li X, Xu J, Miao L, Liu X

Abstract
Dry needling treatment has a promising relieving effect on Myofascial Pain Syndrome (MPS). In China, acupuncture practitioners use acupuncture needle instead to insert the “A-Shi” acupoint to treat MPS which is defined as the same as the trigger point of dry needling. This method has been applied for thousands of years in China. In this study, bupivacaine injection induced gastrocnemius muscle injury in mice. We applied the clinical improved needling method on animal model by making the angle between the skin and needle less than 30 degree. Animals got needling treatment 24 h later at the point where the bupivacaine was injected. Results of muscle H.E. staining showed that, compared to bupivacaine injection group without needling, acupuncture treatment group showed more intact muscle fibers, less inflammatory cell infiltration and fractured muscle fibers. By RNA sequencing analysis, our work firstly demonstrated that the physical stimulation of needling changed the gene expression of muscle tissue to accelerate the muscular regeneration process. Therefore, our study proved that simple needling at “A-Shi” acupoint promoted muscle regeneration and revealed underlying mechanisms of the beneficial effects of acupuncture and dry needle treatments.

PMID: 33132179 [PubMed – as supplied by publisher]

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