alexa Vascular reactivity and effect of serum in a rat model of hypertriglyceridemia and hypertension.
Diabetes & Endocrinology

Diabetes & Endocrinology

Journal of Diabetes & Metabolism

Author(s): Baos G, Carvajal K, Cardoso G, Zamora J, Franco M

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Abstract It has not been definitely established whether elevated circulating triglyceride-rich lipoproteins constitute an independent risk factor for hypertension, atherosclerosis, myocardial infarction, and coronary heart disease. To investigate some aspects of the physiopathology of this lipid metabolism abnormality, a model of experimental hypertriglyceridemia and hypertension in rats was studied. The animals received commercially refined sugar (30\%) in their drinking water during a period of 12 to 17 weeks. Monthly measurements of blood pressure and serum triglycerides were taken during and at the end of the treatment period; the levels of glucose and insulin were also determined. The blood, the aorta, and mesenteric artery were removed. Age- and weight-matched controls were used. The reactivity of the isolated vessels to norepinephrine and acetylcholine and the effect of control and hypertriglyceridemic serum on the same preparations were investigated. In hypertriglyceridemic rats, the response to acetylcholine in the tissues was reduced compared to the control arteries; the hypertriglyceridemic serum elicited contractions that were greater than those induced by control serum. The impaired response of hypertriglyceridemic tissue to the vasodilator and the effect of the hypertriglyceridemic serum on artery contraction suggest that the overall dyslipidemia could contribute to a chronic increase in vascular tone and, consequently, to hypertension.
This article was published in Am J Hypertens and referenced in Journal of Diabetes & Metabolism

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