(A) Total renin mRNA expression in PVN (n=9 per group), RVLM (n=9 per group), SFO (n=8 control, n=9 renin-bNull), ARC (n=9 per group) and NTS (n=9 per group). *, P<0.05 vs control. (B) Acute BP effect of i.c.v. infusion of aliskiren over 30 min (control n=5, renin-bNull n=7). *, P<0.05 vs control; #, P<0.05 vs. i.c.v. vehicle. (C) Model illustrating coordinate regulation of renin-a expression by renin-b in the brain under normal (left) and hypertension-inducing conditions (right).