相关实验视频
Updated: Jan 18, 2026
07:32
Assessment of Vascular Regeneration in the CNS Using the Mouse Retina
Published on: June 23, 2014
14.8K
内甲素B受体抑制可以挽救因衰老而导致的神经元再生能力下降的过程
Rui Feng1, Sarah F Rosen1, Irshad Ansari1
1Department of Neuroscience, Washington University School of Medicine, St Louis, United States.
eLife
|September 9, 2025
概括
抑制内甲蛋白B受体 (ETBR) 增强了外围神经轴突的再生. 这种方法可以扭转与年龄相关的神经修复能力的下降,为老年人群提供潜在的新疗法.
科学领域:
- 神经科学是一个神经科学.
- 再生医学是一种再生医学.
- 衰老研究研究 衰老研究
背景情况:
- 随着年龄的增长,外围感官神经元的轴突再生率下降.
- 内甲素1 (ET-1) 和其受体在轴突再生中的作用尚不清楚.
- ET-1是一种血管收缩剂,与与年龄有关的疾病有关.
研究的目的:
- 研究ET-1信号在依赖于年龄的轴突再生衰退中的作用.
- 确定抑制ET-1信号是否可以改善老年人的轴突再生.
主要方法:
- 单细胞和单核RNA测序的背部根 (DRG).
- 活体 DRG 探索培养以评估轴突生长.
- 在活体研究中,使用FDA批准的ETBR抑制剂Bosentan在老年小鼠中进行.
- 电子显微镜用于分析卫星质细胞 (SGC) 丰富度和连接素43 (Cx43) 表达.
主要成果:
- 卫星质细胞 (SGCs) 表达内皮蛋白B受体 (ETBR),而内皮细胞表达ET-1.
- 在成人和老年人条件下,ETBR的抑制ex vivo改善了轴突生长.
- 在体内Bosentan治疗增强了轴突再生,并逆转了与年龄相关的衰退.
- 老年小鼠在受伤后显示SGC丰度下降和Cx43表达减少,Bosentan部分挽救了这种情况.
结论:
- ETBR信号对轴突再生产生负面影响,特别是在老年人中.
- 抑制ETBR功能增强了轴突再生,并挽救了与年龄相关的缺陷.
- 针对ETBR提供了一个有希望的治疗策略,用于改善老年人群的神经修复.
相关概念视频
01:26Heart Failure Drugs: Inhibitors of Renin-Angiotensin System
943
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...
943
01:18Treatment for Pulmonary Arterial Hypertension: Endothelin Receptor Antagonists
441
Endothelins (ETs) are potent vasoactive peptides critical in the human body's various physiological and pathological processes. One of the most promising therapeutic strategies for treating pulmonary arterial hypertension (PAH) involves counteracting the effects of these endothelins using a class of drugs known as endothelin receptor antagonists.
ETs are synthesized through a complex sequence of enzymatic steps, primarily involving an enzyme referred to as endothelin-converting enzyme...
ETs are synthesized through a complex sequence of enzymatic steps, primarily involving an enzyme referred to as endothelin-converting enzyme...
441
01:24Regulation of Angiogenesis and Blood Supply
3.3K
Rapidly dividing tumors, embryos, and wounded tissues require more oxygen than usual, lowering the oxygen concentration in the blood. At low oxygen or hypoxic conditions, an oxygen-sensitive transcription factor called the hypoxia-inducible factor 1 or HIF1 is activated. HIF1 is a dimeric protein of alpha (ɑ) and beta (β) subunits. Under optimal oxygen conditions, HIF1β is present in the nucleus while HIF1ɑ remains in the cytosol. HIF1ɑ is hydroxylated by prolyl...
3.3K
01:19The Effect of Aging on Tissues
3.4K
Several body functions deteriorate with age. The external signs of aging are easily identifiable. For example, the skin becomes dry, less elastic, and thins out, forming wrinkles. The skin of the face begins to appear looser due to a decrease in the levels of elastic and collagen fibers in the connective tissue. Additionally, melanin production in the hair follicle decreases with age, resulting in gray hair. Moreover, the senses of sight and hearing decline, so glasses and hearing aids may...
3.4K
01:30Antihypertensive Drugs: Angiotensin-Converting Enzyme Inhibitors
2.3K
Angiotensin-converting enzyme (ACE), a vital component of the renin-angiotensin-aldosterone system, is abundant in lung endothelial cells. ACE converts the inactive decapeptide, angiotensin I, into the active octapeptide, angiotensin II. This potent vasoconstrictor narrows blood vessels, increasing resistance to blood flow and elevating blood pressure. Angiotensin II also stimulates aldosterone production, encouraging kidney cells to reabsorb more sodium and water from urine, thereby increasing...
2.3K