FFAR2 and Alzheimer disease: The GPR43-OE group showed: longer novel arm exploration time (39.29 ± 3.58 s vs. AD: 25.52 ± 3.93 s; p < 0.05; Fig. 2H) and higher spontaneous alternation rate (39.68 ± 3.96% vs. AD:28.58 ± 2.81%; p < 0.05; Fig. 2I).