外体mRNA用于血管原生-骨质原生合骨修复
Yifan Ma1,2, Lili Sun3, Jingjing Zhang2
1Department of Biomedical Engineering, The Ohio State University, Columbus, OH, 43210, USA.
Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|October 17, 2023
概括
这项研究引入了带有生长因子mRNAs的治疗性小细胞外囊泡 (t-sEVs),并通过水凝传递,以增强骨再生. 这种新的方法为关键大小的骨缺陷提供了传统干细胞治疗的经济有效和更安全的替代方案.
科学领域:
- 再生医学是一种再生医学.
- 生物材料科学 生物材料科学
- 组织工程是组织工程.
- 纳米技术纳米技术
背景情况:
- 目前用于组织工程的再生医学策略,特别是骨再生,通常依赖于干细胞和生长因子的超生理剂量.
- 这些传统方法带来了诸多挑战,包括高成本和潜在的严重副作用,需要开发更安全,更有效的替代方案.
研究的目的:
- 开发和评估一种用于骨再生的新型治疗系统,使用工程小细胞外囊泡 (t-sEVs).
- 通过可注射水凝传递的装载有血管内皮生长因子A (VEGF-A) 和骨形态蛋白2 (BMP-2) mRNA的t-sEVs的疗效,用于挑战大鼠的股骨缺陷.
主要方法:
- 使用细胞纳米电解系统 (TM-nanoEP) 生产了治疗性小细胞外囊泡 (t-sEV),将等离子体DNA输送到人类脂肪衍生的介质干细胞 (hAdMSCs).
- t-sEVs被内源地装载了VEGF-A和BMP-2mRNA,并被封装在一个定制的PEGylated多 (甘油脂酸盐) 烯酸盐 (PEGS-A) 水凝中.
- 该系统在患有关键大小大腿部缺陷的老鼠中进行了测试,评估了骨再生,血管性-骨质性潜力和生物分布.
主要成果:
- TM-nanoEP系统促进了t-sEVs的高效生产,这些t-sEVs被丰富了高调节的microRNAs,增强了血管-骨质再生.
- 在PEGS-A水凝内局部输送t-sEV促进了在关键尺寸缺陷中高效的骨再生.
- 水凝系统确保了t-sEVs在缺陷部位的受控释放和保留,在其他器官中积累最小,这表明安全性有所提高.
结论:
- 装有治疗性mRNA并通过PEGS-A水凝输送的工程t-sEVs代表了骨再生的有希望,安全和有效的战略.
- 这种创新方法克服了传统干细胞疗法的局限性,为治疗具有挑战性的骨缺陷提供了一种优越的方法.
关键词:
基化聚 (甘油脂酸盐) 烯酸盐 (PEGS-A) 水凝.骨形态遗传蛋白2 (BMP-2) 的mRNA与血管新生-骨质新生再生相结合.携带治疗性mRNA和相关的microRNA的小细胞外囊泡.基于膜的轨道蚀刻纳米电解 (TM-nanoEP) 技术血管内皮生长因子A (VEGF-A)更多相关视频
09:34Visualizing Angiogenesis by Multiphoton Microscopy In Vivo in Genetically Modified 3D-PLGA/nHAp Scaffold for Calvarial Critical Bone Defect Repair
Published on: September 7, 2017
9.3K
07:53Peptides from Phage Display Library Modulate Gene Expression in Mesenchymal Cells and Potentiate Osteogenesis in Unicortical Bone Defects
Published on: December 10, 2010
18.1K
相关概念视频
Regulation of Angiogenesis and Blood Supply
2.6K
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...
2.6K
Osteoclasts in Bone Remodeling
3.0K
Osteoclasts are cells responsible for bone resorption and remodeling. They originate from hematopoietic progenitor cells present in the bone marrow. Numerous progenitor cells fuse to form multinucleated cells, each with 10-20 nuclei. A single osteoclast has a diameter of 150 to 200 µM. These cells have ruffled borders that break down the underlying bone tissue and release minerals such as calcium into the blood in bone resorption. Osteoclasts cling to bones with their ruffled edges during...
3.0K
Fractures: Bone Repair
3.3K
Treatment for a fracture is based on the type of break, the bone affected, and the patient's age.
Minor fractures with no bone displacement are treated by immobilizing the fractured bone using a cast or splint. However, in the case of fractures with displaced bones, the broken bones are repositioned before immobilization to ensure successful healing without deformation and loss of function. The realignment of fractured bone ends is performed through a process called reduction. If the...
Minor fractures with no bone displacement are treated by immobilizing the fractured bone using a cast or splint. However, in the case of fractures with displaced bones, the broken bones are repositioned before immobilization to ensure successful healing without deformation and loss of function. The realignment of fractured bone ends is performed through a process called reduction. If the...
3.3K
Mechanism of Angiogenesis
5.5K
Blood vessel formation starts early during embryonic development, around day 7. In the extraembryonic yolk sac, mesodermal precursor cells called hemangioblast proliferate and differentiate into angioblast. Angioblasts express vascular endothelial growth factor receptor 2 or VEGFR2, which binds VEGF-A, a proangiogenic factor, guiding blood vessel formation. VEGF signaling promotes angioblasts to form a blood island in the developing embryo. Angioblasts further differentiate, giving rise to...
5.5K
Bone Remodeling
38.3K
Bone remodeling is a continuous and balanced process of bone resorption by osteoclasts and bone formation by osteoblasts. In adults, it helps maintain bone mass and calcium homeostasis. While mechanical stress can stimulate turnover as part of the normal maintenance and reparative process, several hormones also regulate bone remodeling.
38.3K
