Erratum to: Increased microenvironment stiffness in damaged myofibers promotes myogenic progenitor cell proliferation

Trensz, F.; Lucien, Fabrice; Couture, Vincent; Söllradl, Thomas; Drouin, Geneviève; Rouleau, André-Jean; Grandbois, Michel; Lacraz, Grégory; Grenier, Guillaume

doi:10.1186/s13395-016-0109-3

Cited by 1 publication

(1 citation statement)

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“…A great number of studies have investigated the effect of the microenvironment on cell proliferation. Studies found the creation of an optimal combination of cells with an appropriate microenvironment was important for promoting proliferation, migration, and differentiation (Kawamura et al, 2016; Trensz et al, 2016). In our study, we proposed that the effect of PBM on neurogenesis can be attributed to its improvement of the microenvironment which neurogenesis depends on for proper health, and the promotion of proliferation and differentiation of internal stem cells in the peri-infarct zone.…”

Section: Discussionmentioning

confidence: 99%

Photobiomodulation therapy promotes neurogenesis by improving post-stroke local microenvironment and stimulating neuroprogenitor cells

Yang

Tucker

Dong

et al. 2018

Experimental Neurology

116

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Recent work has indicated that photobiomodulation (PBM) may beneficially alter the pathological status of several neurological disorders, although the mechanism currently remains unclear. The current study was designed to investigate the beneficial effect of PBM on behavioral deficits and neurogenesis in a photothrombotic (PT) model of ischemic stroke in rats. From day 1 to day 7 after the establishment of PT model, 2-minute daily PBM (CW, 808nm, 350mW/cm, total 294J at scalp level) was applied on the infarct injury area (1.8mm anterior to the bregma and 2.5mm lateral from the midline). Rats received intraperitoneal injections of 5-bromodeoxyuridine (BrdU) twice daily (50mg/kg) from day 2 to 8 post-stoke, and samples were collected at day 14. We demonstrated that PBM significantly attenuated behavioral deficits and infarct volume induced by PT stroke. Further investigation displayed that PBM remarkably enhanced neurogenesis and synaptogenesis, as evidenced by immunostaining of BrdU, Ki67, DCX, MAP2, spinophilin, and synaptophysin. Mechanistic studies suggested beneficial effects of PBM were accompanied by robust suppression of reactive gliosis and the production of pro-inflammatory cytokines. On the contrary, the release of anti-inflammatory cytokines, cytochrome c oxidase activity and ATP production in peri-infarct regions were elevated following PBM treatment. Intriguingly, PBM could effectively switch an M1 microglial phenotype to an anti-inflammatory M2 phenotype. Our novel findings indicated that PBM is capable of promoting neurogenesis after ischemic stroke. The underlying mechanisms may rely on: 1) promotion of proliferation and differentiation of internal neuroprogenitor cells in the peri-infarct zone; 2) improvement of the neuronal microenvironment by altering inflammatory status and promoting mitochondrial function. These findings provide strong support for the promising therapeutic effect of PBM on neuronal repair following ischemic stroke.

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Section: Discussionmentioning

confidence: 99%