通过P28和VEGF交付在基托桑基架中的骨质分化
Keran Zhou1, Bianca Simonassi-Paiva1, Robert Pogue2
1PRISM Research Institute, Technological University of the Shannon, Midlands Midwest, Athlone Main Campus, N37 HD68 Athlone, Ireland.
Molecules (Basel, Switzerland)
|September 13, 2025
概括
新的基托桑基支架载有P28和血管内皮生长因子 (VEGF) 显示出对骨再生的希望. 双重分娩显著增强了早期骨愈合标记,为大骨缺陷提供了潜在的解决方案.
科学领域:
- 生物材料科学 生物材料科学
- 组织工程是组织工程.
- 再生医学是一种再生医学.
背景情况:
- 大型骨缺陷带来了重大的临床挑战,目前的治疗方法如自体移植具有诸如感染风险和血管化不良等局限性.
- 基托 (CS) 基的支架为骨缺陷修复提供了一个有希望的替代方案.
- 优化脚手架的组成和生物活性因子的输送对于增强骨再生至关重要.
研究的目的:
- 开发和评估新的基于CS的支架,其中包括酸 (HAp) 和酸 (FAp) 陶.
- 调查联合输送P28和血管内皮生长因子 (VEGF) 对增强骨再生的影响.
- 评估这些支架在促进骨质分化和骨愈合方面的潜力.
主要方法:
- 使用紫外线交叉连接和冷干燥制造基于CS的支架,结合HAp和FAp.
- 用P28和/或VEGF装载支架来评估双重生物活性因子的交付.
- 脚手架的物理化学特性 (胀,机械强度,多孔性,降解) 的表征.
- 在体外对骨质分化的生物评估 (细胞增殖,ALP活性,ARS染色,RT-qPCR).
主要成果:
- 开发的基于CS的支架呈现出高孔隙性,优秀的胀行为,并在8周内降解.
- 与单因子输送相比,P28和VEGF的同时输送显著增强了早期的骨质生成标志物.
- 优化的陶组成和双重生物活性因子的输送表明了对骨质生成的互补作用.
结论:
- 基于CS的支架采用优化的陶比率和双生物活性因子 (P28和VEGF) 显示出骨再生的巨大潜力.
- 这种方法有效地提高了早期的骨质分化,解决了当前骨缺陷治疗的局限性.
- 对这些先进的支架的进一步研究可能会为患有大骨缺陷的患者带来改善的临床结果.
更多相关视频
10:32Author Spotlight: Simple Establishment of a Vascularized Osteogenic Bone Marrow Niche Using Pre-Cast Poly(Ethylene Glycol) (PEG) Hydrogels in an Imaging Microplate
Published on: May 19, 2023
3.1K
06:05Author Spotlight: Enhancing Bone Regeneration with Vascularized Artificial Cartilage Integration
Published on: July 14, 2023
1.6K
相关概念视频
01:10Mechanism of Angiogenesis
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...
01:24Regulation of Angiogenesis and Blood Supply
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 hydroxylase and factor...
01:16TGF - β Signaling Pathway
The TGF-β signaling pathway regulates cell growth, differentiation, adhesion, motility, and development. TGF-β ligands that induce TGF-β signaling are synthesized in their latent form. Several proteases or cell surface receptors such as integrins act upon the latent form, releasing the active ligand. There are three types of mammalian TGF-βs: (TGF-β1, TGF-β2, and TGF-β3) that bind as homodimers or heterodimers to TGF-β receptors. The TGF-β receptors are of three kinds RI, RII, and RIII. The RI...