On day 0, sham-clipped and two kidney-one clip (2K-1C) rats received bilateral injection with plasmids bearing constructs for β-galactosidase, wild type nNOS or dominant negative mutant nNOS in 250 nL artificial CSF. The groups are sham-clipped, β galactosidase (•, n = 8); sham-clipped, wild type nNOS (▲, n = 5); sham-clipped, dominant negative nNOS (■, n = 7); 2K-1C, β-galactosidase (○, n = 5), 2K-1C, wild type nNOS (△, n = 5); and dominant negative nNOS (□, n = 9). Values are mean ± SE. * P < 0.05 vs all other groups. § P < 0.05 for each 2K-1C group vs day 0 for the same group from days 15 through 35, inclusive. ‡ P < 0.05 for each sham-clipped group vs day 0 for the same group from days 5 through 35, inclusive. Brackets indicate P < 0.05 for MAP and HR in 2K-1C groups vs their respective sham-clipped groups from days 20 through 35, inclusive.