Figure 6.
Representative tracings (A, B) and grouped data (C) showing the effects of hypothalamic paraventricular nucleus (PVN) microinjection of tumor necrosis factor (TNF)-α (25 ng/side) on blood pressure (BP, mmHg), heart rate (HR, bpm), and renal sympathetic nerve activity (RSNA), windowed (spikes/s) and integrated (mV), in rats pretreated with PVN microinjection of vehicle (VEH) (A) or AG1478 (B). Arrows indicate the timing of the injections. Scale bar: 30 min. MBP, mean blood pressure; ΔRSNA (%), percent change from baseline in integrated RSNA. All values are expressed as the means ± SE (in C, n = 6 for each group). *P < 0.05 compared with baseline. †P < 0.05 compared with PVN VEH + PVN TNF-α.