Age- and sex-dependent effects on numbers of hilar GABAergic interneurons in wild-type mice.

<p><b><i>A–D</i></b>, Hilar GABAergic interneurons positive for GAD67 (<b><i>A</i></b>), somatostatin (<b><i>B</i></b>), neuropeptide Y (<b><i>C</i></b>), and parvalbumin (<b><i>D</i></b>) in female and male wild-type mice at 1, 6, 12, and 16 months of age (n = 6−8 mice per group). Results in histograms are presented as the total number of positive cells counted per brain. **<i>p</i><0.01; ***<i>p</i><0.005 (<i>post-hoc</i> Bonferroni test).