体细胞衍生因子封装的纳米颗粒向缺血性心肌,并通过益血管性作用减轻心肌损伤
Shin Yajima1, Seung Hyun Lee2, Junkai Yang2
1Department of Cardiothoracic Surgery, Stanford University, Stanford, CA, USA; Stanford Cardiovascular Institute, Stanford University, Stanford, CA, USA; Department of Cardiovascular Surgery, Osaka University Graduate School of Medicine, Osaka, Japan.
Biomaterials
|February 13, 2025
概括
干细胞衍生因子纳米颗粒 (SDF-NPs) 通过积聚在受损的心脏组织中,有效地向和治疗心肌缺血/再生 (I/R) 损伤. 这种新疗法可以保持心脏功能,并通过增加内皮前代细胞迁移促进愈合.
科学领域:
- 心血管研究研究心血管研究
- 纳米医学是一种纳米医学.
- 再生医学是一种再生医学.
背景情况:
- 心肌缺血/反 (I/R) 损伤仍然是一个重大的临床挑战,导致心脏功能受损和纤维化增加.
- 目前对I / R损伤的治疗方法在有效向受损组织和促进恢复方面存在局限性.
- 干细胞衍生因子 (SDF) 具有血管新生性质,但其系统性管理面临着在损伤部位达到治疗度的挑战.
研究的目的:
- 开发和评估载有SDF (SDF-NP) 的脂质双层纳米颗粒 (NP),用于针对性地传递到I/R受伤的心肌.
- 评估SDF-NP在保护心脏功能,促进血管修复和减少I/R损伤后纤维化的有效性.
- 调查SDF-NP介导心脏保护的潜在机制,包括对内皮原生细胞 (EPC) 和微血管输液的影响.
主要方法:
- 脂质双层纳米粒子是用和没有SDF的.
- 雄性Wistar大鼠接受了心肌I/R侮辱,并接受了系统注射PBS,空NP,SDF溶液或SDF-NP.
- 心脏功能,组织组织学,微血管输液和EPC水平在治疗后的不同时间点被评估.
主要成果:
- 在缺血性心肌中选择性地积累了SDF-NP,与其他治疗方法相比,达到更高的SDF度.
- 在缺血边界区域,SDF-NP治疗导致循环EPC的增加和毛细血管/动脉的保存.
- 用SDF-NPs治疗的心脏在四周后显示左心室喷射分数保持不变,与明显下降的对照组不同.
结论:
- 系统管理的SDF-NP有效地向缺血性心脏组织,为I/R损伤提供显著的心脏保护.
- 心脏保护作用是由通过增加EPC迁移和改善微血管完整性来增强血管生成的介导.
- SDF-NP代表了一种有希望的,在临床上可转换的治疗策略,用于管理心肌I/R损伤.
相关概念视频
Paracrine Signaling
Paracrine signaling allows cells to communicate with their immediate neighbors via secretion of signaling molecules. Such a signal can only trigger a response in nearby target cells because the signal molecules degrade quickly or are inactivated if not taken up. Prominent examples of paracrine signaling include nitric oxide signaling in blood vessels, synaptic signaling of neurons, the blood clotting system, tissue repair/wound healing, and local allergic skin reactions. Nitric oxide as a...
Myocarditis I: Introduction
Myocarditis is inflammation of the myocardium, which is the muscular layer of the heart.EtiologyMyocarditis has a diverse etiology, including a wide range of infectious and non-infectious causes:Infectious CausesViral: Common viruses include Coxsackie A and B, adenovirus, parvovirus B19, enteroviruses, and influenza A.Bacterial: Examples include infections caused by Streptococcus, Staphylococcus, and Mycoplasma species.Rickettsial: Infections like Rocky Mountain spotted fever can result in...


