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Effects of isoproterenol on myocardial fibrosis and related cytokines in rats

Hongxin Wang

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Abstract

AIM:To study the effects of isoproterenol (Iso) on cardiac fibrosis and related cytokines in rats. METHODS:20 SD rats were divided into control and Iso group in random, with 10 rats each group. After injected Iso, cardiac histology was observed and cardiac function, collagen volume fraction (CVF), content of collagen protein and the concentrations of Angiotensin Ⅱ (Angll) and nitrogen monoxide (NO) were measured in the two groups. RESULTS:Compared with control group, microscopic examination showed that fibrosis increased in Iso group. Iso did decrease cardiac function and NO levels and increase CVF, content of collagen protein and AngII levels. Left ventricular pressure maximal rate of rise (+ dp/dt_(max)) and left ventricular systolic pressure (LVSP) were not significantly different from that of control group. CONCLUSIONS:Iso can induce myocardial fibrosis and change levels of related cytokines in rats.

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AIM:To study the effects of isoproterenol (Iso) on cardiac fibrosis and related cytokines in rats. METHODS:20 SD rats were divided into control and Iso group in random, with 10 rats each group. After injected Iso, cardiac histology was observed and cardiac function, collagen volume fraction (CVF), content of collagen protein and the concentrations of Angiotensin Ⅱ (Angll) and nitrogen monoxide (NO) were measured in the two groups. RESULTS:Compared with control group, microscopic examination showed that fibrosis increased in Iso group. Iso did decrease cardiac function and NO levels and increase CVF, content of collagen protein and AngII levels. Left ventricular pressure maximal rate of rise (+ dp/dt_(max)) and left ventricular systolic pressure (LVSP) were not significantly different from that of control group. CONCLUSIONS:Iso can induce myocardial fibrosis and change levels of related cytokines in rats.

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Available abstract

AIM:To study the effects of isoproterenol (Iso) on cardiac fibrosis and related cytokines in rats. METHODS:20 SD rats were divided into control and Iso group in random, with 10 rats each group. After injected Iso, cardiac histology was observed and cardiac function, collagen volume fraction (CVF), content of collagen protein and the concentrations of Angiotensin Ⅱ (Angll) and nitrogen monoxide (NO) were measured in the two groups. RESULTS:Compared with control group, microscopic examination showed that fibrosis increased in Iso group. Iso did decrease cardiac function and NO levels and increase CVF, content of collagen protein and AngII levels. Left ventricular pressure maximal rate of rise (+ dp/dt_(max)) and left ventricular systolic pressure (LVSP) were not significantly different from that of control group. CONCLUSIONS:Iso can induce myocardial fibrosis and change levels of related cytokines in rats.

Key concepts: Fibrosis, Internal medicine, Cardiac function curve, Myocardial fibrosis, Angiotensin II, Endocrinology, Medicine, Ventricular pressure

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