Figure 1.

GLN enhancement of animal cognitive performance. The C57BL/6 male mice received a daily intraperitoneal (IP) GLN injection (0, 3, 10 and 30 mg/mouse) for 7 (A–C) or 14 days (D–F), followed by the novel object recognition test (NORT). A set of objects with a previously presented familiar object (F) and a new novel object (N) were presented to the trained animals. The moving tracks of the animals were recorded (A,D). The recognition index (B,E) and total moving distance (C,F) were determined. The results represent the means ± S.D. (n = 8) *, p < 0.05, compared with the 0 mg group.