Enhanced muscle regeneration in mdx mice, Duchenne muscular dystrophy animal model, proven by CD44 & MYH3 expression, on oral feeding of N-163 strain of Aureobasidium Pullulans produced B-Glucan

Abstract

IntroductionDuchenne muscular dystrophy (DMD) is a rare genetic disease, causing muscle degeneration due to lack of dystrophin with inadequate muscle regeneration culminating in muscle dysfunction. The N-163 strain of Aureobasidium Pullulans produced Beta-1,3-1,6-glucan (Neu REFIX) reported to be safe with anti-inflammatory and anti-fibrotic efficacy earlier, herein we evaluated its effects on muscle regeneration in mdx mice. MethodsForty-five mice in three groups (n=15 each): Group 1 (normal), Group 2 (mdx control), and Group 3 (mdx fed Neu REFIX) were evaluated for 45 days. IGF-1, Dystrophin, CD44 and MYH3 in diaphragm, plasma and skeletal muscle were evaluated by ELISA and immunohistochemistry. ResultsMean IGF-1 expression was 20.32% and 16.27% higher in plasma (p = 0.03) and diaphragm respectively in Neu-REFIX group. Mean dystrophin was higher in Neu-REFIX group by 70.3% and 4.7% in diaphragm and plasma respectively than control. H-score intensity of CD44+ was >2.0 with an MYH3-positivity 20% higher in Neu-REFIX than control. ConclusionOral administration of Neu REFIX was safe. Significantly enhanced plasma IGF-1 beside increased Dystrophin, MYH3 and CD44, proving a restoration of muscle regeneration and differentiation, especially in diaphragm, makes us recommend it as a disease modifying adjuvant in both early and advanced stages of DMD.