Expression of heme oxygenase-1 (HO-1) mRNA in muscle satellite cells (mSCs) isolated from wild-type (WT) and diabetic (db/db) mice. (A) Subconfluent cells cultured in growth medium (GM). (B) Cells cultured for 5 days in GM or differentiation medium (DM): expression of HO-1 in differentiated cells (DM) is shown as a proportion of that in undifferentiated cells (GM); quantitative RT-PCR (n = 11 to 13). EF2 served as an internal control. Each bar represents mean + SEM. *P < 0.05, versus WT.