title: Effects of valsartan on stress-induced changes of serum vascular endothelial growth factor and nitric oxide in mice.
abstract: This study investigated the effects of renin-angiotensin system (RAS) blockade on stress-induced changes of serum vascular endothelial growth factor (VEGF) and nitric oxide (NO) in mice. Chronic stress increased the serum NO levels significantly compared to control group (p = .0172). Valsartan, an angiotensin II receptor antagonist, alone, did not make significant difference versus control group. In chronic stress + valsartan group, serum NO levels decreased nonsignificantly compared to chronic stress group. There was a nonsignificant increase in serum VEGF levels after chronic stress. Valsartan alone or with chronic stress did not significantly affect the serum VEGF levels. In conclusion, there was no correlation between NO and VEGF changes during the stress response. In this respect, there may be other mechanisms to explain the stress-induced NO increase.
authors.affiliation: Istanbul University Istanbul Faculty of Medicine, Department of Pharmacology and Clinical Pharmacology, Capa, Istanbul, Turkey.
authors.forename: Bahar
authors.initials: B
authors.lastname: Erbaş
authors.forename: Yağiz
authors.initials: Y
authors.lastname: Uresin
authors.forename: Mehmet
authors.initials: M
authors.lastname: Ozek
authors.forename: Semra
authors.initials: S
authors.lastname: Doğru-Abbasoğlu
mesh_terms: D000704:Analysis of Variance; D000818:Animals; D000959:Antihypertensive Agents / Q000008:administration & dosage*; D016009:Chi-Square Distribution; D004797:Enzyme-Linked Immunosorbent Assay / Q000379:methods; D008297:Male; D051379:Mice; D008807:Mice, Inbred BALB C; D009569:Nitric Oxide / Q000097:blood*; D012149:Restraint, Physical / Q000379:methods; D013312:Stress, Physiological / Q000378:metabolism*; D013777:Tetrazoles / Q000008:administration & dosage*; D014633:Valine / Q000008:administration & dosage / Q000031:analogs & derivatives*; D000068756:Valsartan; D042461:Vascular Endothelial Growth Factor A / Q000097:blood*
chemical_list: D000959:Antihypertensive Agents; D013777:Tetrazoles; D042461:Vascular Endothelial Growth Factor A; D009569:Nitric Oxide; D000068756:Valsartan; D014633:Valine