Adult WNK3 WT (female WNK+/+ and male WNKY/+), adult WNK3 KO (female WNK3-/- and male WNK3Y/-), and adult male NKCC1 WT or KO mice (NKCC1+/+ and NKCC1-/- mice, originally developed by Flagella et al., 25 (link), each weighing approximately 25–30 g at the ages of 2-3 months, were used in this study. Focal cerebral ischemia was induced by 60-min middle cerebral artery (MCA) occlusion, as previously described 26 (link) and detailed description is provided in the online-only Data Supplement.