例如:"lncRNA", "apoptosis", "WRKY"

Function of AT1 and AT2 receptors in atrial contractions from spontaneous hypertensive and diabetic-induced streptozotocin rats.

Clin. Exp. Pharmacol. Physiol.2018 Dec;45(12):1274-1285. doi:10.1111/1440-1681.13019. Epub 2018 Sep 03
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摘要


Diabetes mellitus and hypertension are diseases that are strongly correlated. A major factor in this correlation is the renin-angiotensin system (RAS), with the peptide angiotensin II being a key component. This study analyzed the impact of Angiotensin Type 1 receptor (AT1R) and Angiotension Type 2 receptor (AT2R) in atrial function. MAIN METHODS: To perform the experiments, Wistar Kyoto rats (WKY), diabetic streptozotocin-induced WKY rats and spontaneously hypertensive rats (SHR) were used, and stimulation of cardiovascular function was done by means of the following drugs: angiotensin II, novokinin and the antagonists losartan and PD123177. We also measured the systolic blood pressure (SBP). RESULTS: An increase in AT1R function was observed in diabetic and hypertensive rats (18% in right atria [RA] and 11% in left atria [LA]). We also observed an increase in calcium release from the endoplasmic reticulum in right atria of diabetic rats (31%) and in right atria of hypertensive rats (35%). On the other hand, a decreased response of AT2R in diabetic and hypertensive rats was observed, this decreased response was greater in hypertensive rats (RA, 10%; LA, 12%). These results have demonstrated a dysfunction of the RAS that may contribute to the common dysfunctions of the cardiovascular system in diabetic and hypertensive rats.

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