在患有阻塞性尿路病症的小鼠中,腺素A2a受体对手伊斯特拉德菲林的双相作用
Emily S H Yeung1,2, Duc Tin Tran1, Sri Nagarjun Batchu1
1Keenan Research Centre for Biomedical Science, St. Michael's Hospital, 6-151 61 Queen Street East, Toronto, ON, M5C 2T2, Canada.
Scientific reports
|November 20, 2025
概括
重新利用帕金森病药物伊斯特拉德菲林治疗脏疾病显示出有前途. 晚期干预用伊斯特拉德菲林减弱纤维化,但早期干预增加了小鼠的死亡率.
科学领域:
- 腎臟病學 (nephrology) 是一種醫學.
- 药理学 药理学是指药理学的学科.
- 纤维化研究 纤维化研究
背景情况:
- 渐进性纤维化是慢性病 (CKD) 的特征,无论原因如何.
- 腺A2a受体存在于激活的纤维细胞上.
- 伊斯特拉迪菲林是一种腺A2a受体对抗剂,已被批准用于帕金森病.
研究的目的:
- 调查用于治疗纤维化的伊斯特拉德菲林重新利用的潜力.
- 在纤维化小鼠模型中评估伊斯特拉德菲林的疗效和安全性.
主要方法:
- 患有由单边尿路阻塞 (UUO) 引起的纤维化的小鼠被用载体或伊斯特拉德菲林治疗.
- 干预时间有所不同:早期 (手术后第一天) 或晚期 (手术后第七天).
- 在脏组织和纤维细胞中分析了基因表达和细胞外矩阵蛋白质水平.
主要成果:
- 在UUO小鼠中,早期的伊斯特拉德菲林干预增加了死亡率和炎症基因表达.
- 晚期的伊斯特拉德菲林干预减弱了包括Il11和细胞外矩阵蛋白在内的蛋白质标志物.
- 伊斯特拉德菲林降低了通过转化生长因子-β1.1.刺激的纤维细胞中的Il11,Col1a1和Fn1表达.
结论:
- 氨酸A2a受体对抗性具有狭窄的治疗窗口,可以减缓CKD的进展,这是由于其双重的抗炎和益菌作用.
- 用伊斯特拉德菲林的晚期干预显示了减轻纤维化的潜力.
- 需要进一步的研究来优化伊斯特拉德菲林在治疗脏疾病中的使用.
相关概念视频
Adrenergic Antagonists: Pharmacological Actions of ɑ-Receptor Blockers
1.4K
α-Adrenergic antagonists, known as α-blockers, exert their effects by inhibiting α-adrenoceptors, leading to specific physiological actions. α1-blockers and α2-blockers have distinct pharmacological actions and therapeutic applications.
α1-blockers: These drugs inhibit α1-adrenoceptors on smooth muscle cells, resulting in vasodilation. This vasodilation lowers blood pressure, making α1-blockers valuable in treating hypertension. Additionally,...
α1-blockers: These drugs inhibit α1-adrenoceptors on smooth muscle cells, resulting in vasodilation. This vasodilation lowers blood pressure, making α1-blockers valuable in treating hypertension. Additionally,...
1.4K
Adrenergic Receptors: ɑ Subtype
2.6K
Adrenoceptors are classified into α and ꞵ classes based on their potencies to catecholamine agonists. α-adrenoceptors show the following order of catecholamine potency:
Adrenaline ≥ Noradrenaline >> Isoprenaline
α-adrenoceptors are further divided into α1 and α2-adrenoceptors.
α1-Adrenoceptors: These receptors are located postsynaptically on the effector organs and cause constriction of smooth muscle mediated by activation of phospholipase...
Adrenaline ≥ Noradrenaline >> Isoprenaline
α-adrenoceptors are further divided into α1 and α2-adrenoceptors.
α1-Adrenoceptors: These receptors are located postsynaptically on the effector organs and cause constriction of smooth muscle mediated by activation of phospholipase...
2.6K
Antiarrhythmic Drugs: Class II Agents as β-Adrenergic Blockers
1.4K
Adrenergic stimulation generally impacts cardiac rate and rhythm. Specifically, stimulation of the β-adrenoceptors triggers an increase in intracellular calcium ion influx and pacemaker currents, which may cause arrhythmias. Catecholamines like adrenaline also demonstrate β2-adrenoceptor-mediated hypokalemia, impacting cardiac action potential and disrupting the normal cardiac rhythm. Class II antiarrhythmic drugs are β-adrenoceptor antagonists or β-blockers, which...
1.4K
Adrenergic Antagonists: Chemistry and Classification of ɑ-Receptor Blockers
1.4K
Adrenergic antagonists, or sympatholytics, inhibit adrenoceptor activation driven by catecholamines or agonists. Based on their adrenoceptor specificity, adrenergic blockers can be categorized into two primary groups: α-adrenergic blockers (α-blockers) and β-adrenergic blockers (β-blockers). α-blockers interact with α1 and α2 subtypes of α-adrenoceptors.
Nonselective α-blockers: Nonselective α-blockers contain haloalkylamine or imidazoline...
Nonselective α-blockers: Nonselective α-blockers contain haloalkylamine or imidazoline...
1.4K
Adrenergic Antagonists: ɑ and β-Receptor Blockers
1.1K
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...
1.1K
Antiarrhythmic Drugs: Class III Agents as Potassium Channel Blockers
1.8K
Class III antiarrhythmic drugs are a group of medications that can prolong action potentials in the heart. They achieve this by blocking potassium channels or enhancing inward currents from sodium channels. However, these drugs have a unique property of "reverse use-dependence," which is most pronounced at slower heart rates and can lead to torsades de pointes—a specific type of arrhythmia. However, it is essential to note that excessive QT interval prolongation—a measure of...
1.8K


