Fig. 2.

Immunohistochemistry for Ki-67 in the hippocampal dentate gyrus of the vehicle- (A, B) and earthworm extract (EE)-treated (C, D) groups. Fewer Ki-67⁺ cells (arrows) were evident in the EE-treated group than those in the vehicle-treated group. GCL, granule cell layer; ML, molecular layer; PL, polymorphic layer; SGZ, subgranular layer. Scale bar=100 µm. (E) Mean number of Ki-67⁺ cells per section in the vehicle- and EE-treated groups (n=7/group; ^*P<0.05, significantly different from the vehicle-treated group).