Fig. 2.

a Bar graphs demonstrating that treatment of aged rats with NT-020, but not young rats, significantly increased the relative cellular proliferation in MSCs treated with serum from these rats (one-way ANOVA F(3,16) = 8.746 followed by Sidak’s multiple comparison test **=p < 0.01). b It can be observed that old rat serum decreases proliferation of MSCs when compared with young serum when measured using BrdU. Serum from aged rats treated with NT-020 increased the proliferation of MSCs when compared with serum from aged controls (one-way ANOVA F(3,12) = 11.22 followed by Sidak’s multiple comparison ***p < 0.001; *p < 0.05)