Figure 2.

Immunohistochemistry of TGF-β in disc cells from experimental, control and normal groups at different periods. The positive rate of TGF-β in disc cells of diabetic rats in experimental group was significantly lower than that of normal group, and higher than that of control group at three different periods (P < 0.05). (a–c) corresponded to the second, fourth, and sixth weeks in normal group. (d–f) corresponded to the second, fourth, and sixth weeks in control group. (g–i) corresponded to the second, fourth, and sixth weeks in experimental group. (A color version of this figure is available in the online journal.)