Figure 4.

Inhibition of TNF‐α on glucose uptake in mouse C2C12 myoblasts (a), and effect of extract from Ruellia tuberosa L. (RTL) on glucose uptake in TNF‐α‐induced insulin‐resistant mouse C2C12 myoblasts (b). C: Cells incubated with DMEM medium containing 100 nM insulin; N: Cells incubated with DMEM medium; T: Cells induced insulin resistance by TNF‐α. *p < 0.05, *^* p < 0.01: Significantly different from N. a–b letter is significantly different from C (p < 0.05). a–d letter is significantly different from T (p < 0.05)