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J Biophotonics ; 11(9): e201800110, 2018 09.
Article in English | MEDLINE | ID: mdl-29749025

ABSTRACT

Diabetic peripheral neuropathy (DPN) is a nervous disorder caused by diabetes mellitus, affecting about 50% of patients in clinical medicine. Chronic pain is one of the major and most unpleasant symptoms developed by those patients, and conventional available treatments for the neuropathy, including the associated pain, are still unsatisfactory and benefit only a small number of patients. Photobiomodulation (PBM) has been gaining clinical acceptance once it is able to promote early nerve regeneration resulting in significant improvement in peripheral nerves disabilities. In this work, the effects of PBM (660 nm, 30 mW, 1.6 J/cm2 , 0.28 cm2 , 15 s in a continuous frequency) on treating DPN-induced pain and nerve damage were evaluated in an experimental model of diabetic-neuropathy induced by streptozotocin in mice. PBM-induced antinociception in neuropathic-pain mice was dependent on central opioids release. After 21 consecutive applications, PBM increased nerve growth factor levels and induced structural recovery increasing mitochondrial content and regulating Parkin in the sciatic nerve of DPN-mice. Taking together, these data provide new insights into the mechanisms involved in the effects of PBM-therapy emphasizing its therapeutic potential in the treatment of DPN.


Subject(s)
Diabetes Mellitus, Experimental/physiopathology , Homeostasis/radiation effects , Low-Level Light Therapy , Mitochondria/radiation effects , Nociception/radiation effects , Sciatic Nerve/physiopathology , Sciatic Nerve/radiation effects , Animals , Biomechanical Phenomena/radiation effects , Diabetes Mellitus, Experimental/pathology , Diabetes Mellitus, Experimental/therapy , Male , Mice , Mice, Inbred C57BL , Mitochondria/metabolism
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