通过GPER激活在达尔盐敏感大鼠中的怀孕依赖心脏保护
bioRxiv : the preprint server for biology
|April 16, 2025
概括
一种GPER激活剂,LNS8801,改善了高血压孕妇大鼠的心脏功能,并减少了蛋白尿. 怀孕的适应增强了GPER.
科学领域:
- 心血管生理学心血管生理学
- 内分泌学 在内分泌学.
- 药理学 药理学是指药理学的学科.
背景情况:
- 孕前带来了由于怀孕引起的心脏功能障碍的长期心血管风险.
- 在怀孕相关的心脏功能障碍中,G蛋白结合雌激素受体 (GPER) 的作用尚不清楚.
- 怀孕期间的荷尔蒙波动和血液动力学变化会影响心血管适应.
研究的目的:
- 为了研究LNS8801的心脏保护作用,一个GPER激动剂,在孕妇和处女高血压大鼠.
- 为了评估LNS8801对心脏功能和血压的影响,在孕前模型中.
- 为了确定怀孕适应是否调节GPER介导的心脏保护.
主要方法:
- 达尔盐敏感 (SS/Jr) 鼠,处女和怀孕,接受了LNS8801或车载.
- 评估心脏功能使用心声回声和斑点跟踪应变分析.
- 测量了平均动脉压和蛋白尿,以评估系统性影响.
主要成果:
- LNS8801显著改善了怀孕大鼠的心脏功能 (心和心) 和压力参数.
- 在处女和怀孕的老鼠中,LNS8801减少了蛋白尿,这表明脏的保护作用.
- 在处女大鼠中没有观察到LNS8801对心脏功能或血压的显著影响.
结论:
- 孕期特定的适应增强了GPER介导的心脏保护.
- LNS8801显示出作为治疗妊娠相关心血管功能障碍的治疗剂的潜力.
- 针对GPER需要考虑怀孕的独特生理环境.
相关概念视频
01:33Hormonal Regulation
32.7K
The renin-aldosterone system is an endocrine system which guides the renal absorption of water and electrolytes, thus managing blood pressure and osmoregulation. Activation of the system begins in the kidneys with a small cluster of cells adjacent to the afferent and efferent blood vessels of the renal corpuscle. As the nephrons are filtering blood, juxtaglomerular cells monitor blood pressure. If they detect a decrease in pressure, they release the hormone renin into the bloodstream.
32.7K
01:09GPCRs Regulate Adenylyl Cylase Activity
5.1K
Some GPCRs transmit signals through adenylyl cyclase (AC), a transmembrane enzyme. AC helps synthesize second messenger cyclic adenosine monophosphate (cAMP). AC catalyzes cyclization reaction and converts ATP to cAMP by releasing a pyrophosphate. The pyrophosphate is further hydrolyzed to phosphate by the enzyme pyrophosphatase, which drives cAMP synthesis to completion. However, cAMP is rapidly degraded to 5′ AMP by the enzymes phosphodiesterase (PDE), preventing overstimulation of...
5.1K
01:26Heart Failure Drugs: Inhibitors of Renin-Angiotensin System
321
The activation of the sympathetic nervous system and the renin-angiotensin-aldosterone system (RAAS) contributes to cardiac remodeling, and inhibiting the RAAS is a pharmacological target in heart failure management. As a result, neurohumoral modulation is a crucial treatment principle for managing heart failure. This approach involves using medications like ACE inhibitors (ACEIs), angiotensin receptor blockers (ARBs), β-blockers, mineralocorticoid receptor antagonists (MRAs), and neutral...
321
01:12GPCR Desensitization
5.6K
G protein-coupled receptor (GPCR) signaling plays a crucial role in cell functioning. GPCR desensitization is an equally essential process. It allows cells to respond to changing environments and regain sensitivity to new stimuli while preventing unnecessary stimulation when no longer needed. Prolonged exposure to stimuli leads to GPCR desensitization. It involves blocking the receptors from binding and activating additional G proteins. This inhibits activation of downstream effectors, thereby...
5.6K
01:27Transducer Mechanism: Enzyme-Linked Receptors
2.3K
Enzyme-linked receptors are cell-surface receptors acting as an enzyme or associating with an enzyme intracellularly. They make excellent drug targets. Drugs can bind to the extracellular ligand-binding domain or directly affect their enzymatic domain and alter their activity.
Major types that are helpful drug targets include:
Major types that are helpful drug targets include:
2.3K
01:31Adrenergic Antagonists: ɑ and β-Receptor Blockers
386
Third-generation β-blockers, such as labetalol and carvedilol, represent a significant advancement in managing cardiovascular conditions. Unlike conventional β-blockers, which can induce peripheral vasoconstriction, third-generation drugs block α1 adrenoceptors. This promotes vasodilation through several mechanisms, such as increased nitric oxide production, inhibition of calcium ion entry, opening of potassium ion channels, and antioxidant action. Labetalol, for instance, is...
386