Antioxidant Vitamins and Adrenocorticotrophic Hormone-Induced Hypertension in Rats

C.G. Schyvens, M.C. Andrews, T. Tam, Trevor Mori, Kevin Croft, K.U.S. Mckenzie, J.A. Whitworth, Y. Zhang

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

This study examined whether the anti-oxidants ascorbic acid, alpha- or gamma-tocopherol, could modify adrenocorticotrophic hormone (ACTH)-hypertension in Sprague-Dawley rats, a model associated with increased oxidative stress. Systolic blood pressure (SBP) was measured by the tail-cuff method. After four days of ascorbic acid (AA) (200mg/kg/day drinking) or a-tocopherol (500 mglkgld i.p. or feed), rats were co-administered ACTH (0.2 mg/kg/day s.c.) or saline for 11 days (prevention studies). In reversal studies, ACTH/saline was administered for 15 days, and from day 9, alpha- or gamma-tocopherol (20 mg/kg/day) was added. ACTH increased SBP compared to saline (p < 0.05). AA or a-tocopherol failed to prevent and alpha- or gamma-tocopherol failed to reverse ACTH-induced hypertension. Thus, neither vitamin C (water soluble) nor E (lipid soluble) modified ACTH-induced hypertension in the rat.
Original languageEnglish
Pages (from-to)465-478
JournalClinical and Experimental Hypertension
Volume29
Issue number7
DOIs
Publication statusPublished - 2007

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