Fig. 1

BmMSCs constitutively express MEF2 protein in all conditions tested. a Immunofluorescent staining of human myoblast SJCRH30 cells (Pos control; representative of n = 2, image dimension 1249 μm × 1102 μm) showing nuclear expression of MEF2. Day 0 (representative of n = 7 donors), day 14 post-HS (representative of n = 4 donors), and post-P/PL (representative of n = 7 donors) treatment demonstrate nuclear expression. Day 0 and day 14 image dimensions: 254 μm × 220 μ μm (upper panel) and 1249 μm × 1102 μm (lower panel). b Percent MEF2 positive cells. c Immunofluorescent score