Fig. 1

Aging increased iPLA2β loss in the PFC of mice. A PLA2s mRNA expression levels in the PFC were assessed using qPCR. Normalization was conducted relative to GAPDH expression levels. n = 10. B iPLA2β protein levels in the PFC were assessed via Western blotting. n = 3. C Representative IHC images depicting iPLA2β in the PFC. IHC analysis showing the density of iPLA2β (+) cells/mm². Scale bar: 100 μm. n = 16. D Representative immunofluorescence images depicting iPLA2β (red) and NeuN (green) in the PFC. The bar graph shows the percentage of iPLA2β(+) NeuN(+) cells relative to the total NeuN(+) cell population (%).Scale bar: 20 μm. n = 10

M represents “month” Data are presented as mean ± SEM; p values were obtained using Mann-Whitney U test (A), one-way analysis of variance (ANOVA) followed by Tukey’s post hoc test (B), and two-sided unpaired Student’s t-tests (C, D). * p < 0.05. **, p < 0.01; ***, p < 0.001