首页> 外文期刊>Life sciences >CELL CALCIUM HANDLING AND INTRACELLULAR PH REGULATION IN HEREDITARY HYPERTRIGLYCERIDEMIC RATS - REDUCED PLATELET RESPONSE TO THROMBIN STIMULATION
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CELL CALCIUM HANDLING AND INTRACELLULAR PH REGULATION IN HEREDITARY HYPERTRIGLYCERIDEMIC RATS - REDUCED PLATELET RESPONSE TO THROMBIN STIMULATION

机译:遗传性高甘油三酯血症大鼠细胞钙的处理和细胞内PH的调节-血小板对凝血酶刺激的反应减少。

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摘要

Multiple cell membrane alterations have been described in humans and animals with various genetic forms of hypertension and/or dyslipidemia. The aim of our study was to characterize some properties of platelets and/or erythrocytes (cytosolic calcium handling, intracellular pH regulation and thrombin responsiveness) in a new model of genetic hypertension associated with hyperlipidemia - Prague hereditary hypertriglyceridemic (HTG) rats. There were no differences in basal cytosolic Ca2+ values in platelets or erythrocytes of HTG rats and control Wistar rats. Ca2+ influx into erythrocytes was also similar in HTG and control rats. In both strains Ca2+ influx correlated positively with plasma triglycerides. The slope of this relationship was less steep in HTG than in Wistar rats. Cytosolic Ca2+ response to thrombin stimulation was smaller in HTG platelets, which were also characterized by a major reduction of thrombin-induced Mn2+ entry through receptor-operated Ca2+ channels. Platelets of HTG rats had the same basal intracellular pH(i) values and similar buffering capacity as control rats but their pH(i) response to thrombin stimulation was substantially reduced. It can be concluded that reduced responsiveness to thrombin stimulation is a major alteration found in platelets of hypertensive hereditary hypertriglyceridemic rats. [References: 42]
机译:已经在人类和动物中描述了具有多种遗传形式的高血压和/或血脂异常的多细胞膜改变。我们研究的目的是在与高脂血症相关的遗传性高血压的新模型-布拉格遗传性甘油三酸酯(HTG)大鼠中表征血小板和/或红细胞的某些特性(胞浆钙处理,细胞内pH调节和凝血酶反应性)。 HTG大鼠和对照组Wistar大鼠的血小板或红细胞中的基础胞质Ca2 +值无差异。在HTG和对照组大鼠中,Ca2 +流入红细胞的情况也相似。在两种菌株中,Ca 2+内流与血浆甘油三酸酯呈正相关。 HTG中这种关系的斜率不如Wistar大鼠陡。 HTG血小板中对凝血酶刺激的胞质Ca2 +响应较小,其特征还在于凝血酶诱导的Mn2 +通过受体操纵的Ca2 +通道的进入大大减少。 HTG大鼠的血小板与对照组大鼠具有相同的基础细胞内pH(i)值和相似的缓冲能力,但其对凝血酶刺激的pH(i)反应大大降低。可以得出结论,对凝血酶刺激的反应性降低是在高血压遗传性高甘油三酸酯血症大鼠的血小板中发现的主要变化。 [参考:42]

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