Effects of angiotensin II receptor blockade with valsartan on pro-inflammatory cytokines in patients with essential hypertension

Abstract

Chronic inflammation is common in hypertension and acts as an independent determinant of arterial blood pressure. Hypertensive patients are reported to have high circulating levels of pro-inflammatory cytokines such as tumor necrosis factor-alpha (TNF-alpha), interleukin-6 (IL-6), and C-reactive protein (CRP). Recently, angiotensin II receptor blockers (ARBs) have been shown to possess benefits in addition to their ability to lower blood pressure, including anti-inflammatory and antioxidative properties within the vasculature. We evaluated the effects of the angiotensin II receptor blocker, valsartan, on these inflammatory cytokines. Thirty-nine patients with essential hypertension participated. These subjects received valsartan, 40 to 80 mg/day. Serum TNF-alpha, IL-6, CRP, and serum amyloid A (SAA) were measured before and after 3 months of treatment with valsartan. Valsartan significantly decreased systolic and diastolic blood pressure (160 +/- 16/92 +/- 11 mm Hg to 147 +/- 21/84 +/- 11 mm Hg, P = 0.001/P = 0.001, respectively). Serum TNF-alpha (9.1 +/- 8.6 pg/mL to 6.1 +/- 1.0 pg/mL, P = 0.006) and IL-6 (9.3 +/- 1.7 pg/mL to 8.9 +/- 1.4 pg/mL, P = 0.005) were significantly reduced after treatment with valsartan. However, C-reactive protein and serum amyloid A did not change. The angiotensin II receptor blocker, valsartan, may inhibit the development of atherosclerosis by lowering serum pro-inflammatory cytokines.