Effects of potassium supplementation and depletion in the development of salt-sensitive hypertension in male and female rats

The inverse effects that dietary sodium and potassium have on blood pressure have been known for some time. High sodium consumption is detrimental, while potassium supplementation is known to be beneficial, and the ratio of sodium/potassium consumption is also very important to consider when determining how these electrolytes affect salt-induced hypertension; however, the mechanisms behind the beneficial effects of potassium are still not yet entirely established. Inwardly rectifying potassium (Kir) channels have been shown to play a major role in potassium transport and homeostasis in the kidney and might contribute to these effects. Here we aimed to examine how different variations in the sodium/potassium ratio affect the development of salt-sensitive hypertension and how channels and transporters in the kidney are altered to accommodate these changes. We hypothesize that these diets will affect the development of salt-sensitive hypertension, and that Kir channels will play a major role in the renal adaptations to varying intakes of potassium膳食钠与钾对血压的反向作用早已为学界所熟知。高钠摄入对机体有害，而补钾则被证实有益；在探究此类电解质如何影响盐诱导高血压时，膳食钠/钾摄入比同样是至关重要的考量因素。然而，钾发挥有益作用的具体分子机制尚未完全阐明。内向整流钾（Inwardly rectifying potassium, Kir）通道已被证实于肾脏钾离子转运与稳态维持中发挥核心作用，或参与介导上述效应。本研究旨在探究钠/钾摄入比的不同变化如何影响盐敏感性高血压的发生发展，以及肾脏内的通道与转运蛋白如何发生适应性重塑以适配此类膳食改变。我们提出如下假说：不同膳食模式会影响盐敏感性高血压的发生发展，而Kir通道将在肾脏针对钾离子摄入变化产生的适应性调节中发挥关键作用。