14 December 2019 : Laboratory Research
Omega-3 Fatty Acid Supplementation Reduces Intervertebral Disc Degeneration
Zachary NaPier12ABCDEFG, Linda E.A. Kanim13ABDEF, Yasaman Arabi124B, Khosrowdad Salehi124B, Barry Sears5E, Mary Perry5BCDEF, Sang Kim2A, Dmitriy Sheyn12467DEG, Hyun W. Bae123ADEFG, Juliane D. Glaeser124ABCDEFG*DOI: 10.12659/MSM.918649
Med Sci Monit 2019; 25:9531-9537
Abstract
BACKGROUND: Intervertebral disc (IVD) degeneration is a common cause of lower back pain, which carries substantial morbidity and economic cost. Omega-3 fatty acids (n-3 FA) are known to reduce inflammatory processes with a relatively benign side effect profile. This study aimed to investigate the effect of n-3 FA supplementation on IVD degeneration.
MATERIAL AND METHODS: Two non-contiguous lumbar discs of 12 Sprague Dawley rats were needle-punctured to induce disc degeneration. Post-surgery, rats were randomly assigned to either a daily n-3 FA diet (530 mg/kg/day of eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) in a 2: 1 ratio, administered in sucrose solution) or control diet (sucrose solution only), which was given for the duration of the study. After 1 month, blood serum arachidonic acid/eicosapentaenoic acid (AA/EPA) ratios were analyzed. After 2 months, micro-MRI (magnetic resonance imaging) analysis and histological staining of disc explants were performed to analyze the IVD.
RESULTS: A reduction of blood AA/EPA ratios from 40 to 20 was demonstrated after 1 month of daily supplementation with n-3 FA. Micro-MRI analysis showed an injury-induced reduction of IVD hydration, which was attenuated in rats receiving n-3 FA. Histological evaluation demonstrated the destruction of nucleus pulposus tissue in response to needle puncture injury, which was less severe in the n-3 FA diet group.
CONCLUSIONS: The results of this study suggest that n-3 FA dietary supplementation reduces systemic inflammation by lowering AA/EPA ratios in blood serum and has potential protective effects on the progression of spinal disc degeneration, as demonstrated by reduced needle injury-induced dehydration of intervertebral discs and reduced histological signs of IVD degeneration.
Keywords: Fatty Acids, Omega-3, intervertebral disc degeneration, Spine, Dietary Supplements, Docosahexaenoic Acids, eicosapentaenoic acid, intervertebral disc, Low Back Pain, Magnetic Resonance Imaging, nucleus pulposus
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