一个微凝骨髓模型,介质干细胞的帕克林信号支持造血干细胞保留支持造血干细胞保留
Gunnar B Thompson1, Kaila M Kuo2, Andrés J García3,4
1Dept. Chemical and Biomolecular Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801.
bioRxiv : the preprint server for biology
|December 22, 2025
概括
这项研究引入了一种新的3D水凝共同培养系统,使用介质细胞 stromal 细胞 (MSCs) 来改善造血干细胞 (HSC) 维护. 工程骨髓模型通过模仿自然的利基互动来支持长期的HSC.
科学领域:
- 生物材料科学 生物材料科学
- 干细胞生物学 干细胞生物学
- 组织工程是组织工程.
背景情况:
- 造血干细胞 (HSC) 对于血液和免疫细胞生成至关重要.
- 传统的2D/液体培养对活体HSC扩张有局限性.
- 水凝支架提供了模仿骨髓微环境的潜力.
研究的目的:
- 开发一个骨髓的3D粒状水凝共同培养模型.
- 为了研究介质干细胞 (MSC) 封装在HSC维护中的作用.
- 为了优化培养条件,使HSC在体外扩张和长期重新繁殖.
主要方法:
- 创建了一个多细胞骨髓模型,使用HSC和MSC载荷的水凝微球 (microgels).
- 在HSCs和封装的MSCs之间建立了对信号传输.
- 确定了一种支持MSC功能和HSC稳定的无血清介质.
主要成果:
- 微凝封装促进了有利于利基的MSC转录形状.
- 在粒状共同培养中MSC密度与长期HSC维护有正相关.
- 在矩阵中间歇播种这两种细胞类型导致显著的HSC枯竭.
结论:
- 一种颗粒状水凝共同培养系统有效地模拟了骨髓利基相互作用.
- MSC封装和密度对于维持长期重新填充HSCs来说至关重要.
- 这个3D模型为研究工程组织中的MSC-HSC相互作用提供了一个平台.
更多相关视频
10:03Bioengineering of Humanized Bone Marrow Microenvironments in Mouse and Their Visualization by Live Imaging
Published on: August 1, 2017
12.2K
09:07A Human Bone Marrow 3D Model to Investigate the Dynamics and Interactions Between Resident Cells in Physiological or Tumoral Contexts
Published on: December 16, 2022
3.8K
相关概念视频
01:19Multipotency of Hematopoietic Stem Cells
3.8K
The hematopoietic stem cells or HSCs are multipotent, meaning they can differentiate and give rise to all blood and immune cells. HSCs are maintained in the quiescent stage until an external stimulus initiates their differentiation. The multipotent HSCs exist as two heterogeneous populations, long-term repopulating cells (LTRC) and short-term repopulating cells (STRC). The two HSC populations have different surface markers or receptors and are classified based on quiescence and long-term...
3.8K
01:19Mesenchymal Stem Cells
5.5K
Mesenchymal stem cells (MSCs) are adult stem cells that can differentiate into most connective tissue cell types, except for hematopoietic cells, depending upon the source of MSCs. For example, bone-marrow-derived MSCs (BM-MSCs) can differentiate into osteocytes, hepatocytes, and pancreatic and neuronal cells. MSCs can be isolated from various sources such as bone marrow, placenta, adipose tissue, teeth, and Wharton’s jelly, a gelatinous substance in the umbilical cord. The ease of their...
5.5K