细胞延长因子2激酶抑制剂,A484954,诱导低血糖和低血压的影响
Tomoko Kodama1, Satoshi Kameshima2, Kosuke Otani1
1Laboratory of Veterinary Pharmacology, School of Veterinary Medicine, Kitasato University, Towada, Japan.
eEF2K抑制剂A484954通过降低脏SGLT2降低血糖,并通过依赖于氧化的血管松和糖尿病大鼠的尿液注射改善高血压.
科学领域:
- 生物化学 生物化学
- 药理学 药理学是指药理学的学科.
- 生理学 生理学 生理学
背景情况:
- 细胞延长因子2激酶 (eEF2K) 是一种Ca2+/calmodulin依赖的蛋白激酶.
- 之前的研究表明,A484954是一种eEF2K抑制剂,可以通过氧化 (NO) 降低血压,并通过自发高血压的老鼠增加尿液输出.
- 奥茨卡·朗·埃文斯 (Otsuka Long-Evans Tokushima Fatty) (OLETF) 的老鼠因肥胖和2型糖尿病而表现出高血压.
研究的目的:
- 调查A484954在OLETF大鼠中诱导低血糖效应的假设,类似于其低血压效应.
- 探索NO生产在调解这些效应中的作用.
- 为了确定A484954是否影响糖共运输体2 (SGLT2) 的表达.
主要方法:
- OLETF大鼠每天接受A484954 (2.5毫克/公斤) 的腹腔内注射,持续7天.
- 测量包括血液和尿路葡萄糖水平,尿液输出,静脉血压和左心室收缩率.
- 为了评估分子和功能变化,进行了西面涂抹和同度张力测量.
主要成果:
- A484954 给药降低了血糖,增加了尿路中的葡萄糖分泌.
- 观察到脏SGLT2蛋白表达的显著减少.
- 系统性血压下降,伴随着NO依赖的血管松和尿液.
- 左心室收缩性得到了增强.
结论:
- A484954通过减少脏中SGLT2介导的葡萄糖再吸收,显示出低血糖的影响.
- 该化合物通过NO-依赖的血管松和尿液疏散改善糖尿病并发症,包括高血压.
- A484954对心脏功能表现出积极的内效应.
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