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. 2018 Jun 11;8:8894. doi: 10.1038/s41598-018-26962-9

Figure 5.

Figure 5

Effect of PQQ on IL-2 (A), IFN-γ (B) levels in serum and the production of PGE2 (C) in the hippocampus of the D-gal-treated mice. **P < 0.01, *P < 0.05 relative to control group; ##P < 0.01, #P < 0.05 relative to D-gal group.