Figure 6. VD3 does not protect myotubes against atrophy induced by dexamethasone. (A) Myotube diameters were measured after 24 h treatment with 5 μM dexamethasone (DEXA) alone or in combination with 100 nM VD3. (B) Expression of Atrogin-1 (Fbxo32) was assessed by real-time RT-PCR. Data are presented as the mean ± SEM. ** P <0.01.