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Article Publish Status: FREE
Abstract Title:

Vitamin B Complex Treatment Attenuates Local Inflammation after Peripheral Nerve Injury.

Abstract Source:

Molecules. 2019 Dec 17 ;24(24). Epub 2019 Dec 17. PMID: 31861069

Abstract Author(s):

Adil Ehmedah, Predrag Nedeljkovic, Sanja Dacic, Jelena Repac, Biljana Draskovic Pavlovic, Dragana Vucevic, Sanja Pekovic, Biljana Bozic Nedeljkovic

Article Affiliation:

Adil Ehmedah

Abstract:

Peripheral nerve injury (PNI) leads to a series of cellular and molecular events necessary for axon regeneration and reinnervation of target tissues, among which inflammation is crucial for the orchestration of all these processes. Macrophage activation underlies the pathogenesis of PNI and is characterized by morphological/phenotype transformation from proinflammatory (M1) to an anti-inflammatory (M2) type with different functions in the inflammatory and reparative process. The aim of this study was to evaluate influence of the vitamin B (B1, B2, B3, B5, B6, and B12) complex on the process of neuroinflammation that is in part regulated by l-type Ca1.2 calcium channels. A controlled transection of the motor branch of the femoral peripheral nerve was used as an experimental model. Animals were sacrificed after 1, 3, 7, and 14 injections of vitamin B complex. Isolated nerves were used for immunofluorescence analysis. Treatment with vitamin B complex decreased expression of proinflammatory and increased expression of anti-inflammatory cytokines, thus contributing to the resolution of neuroinflammation. In parallel, B vitamins decreased the number of M1 macrophages that expressed the Ca1.2 channel, and increased the number of M2 macrophages that expressed this channel, suggesting their role in M1/M2 transition after PNI. In conclusion, B vitamins had the potential for treatment of neuroinflammation and neuroregeneration and thereby might be an effective therapy for PNI in humans.

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