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Integrated Bone Formation Through In Vivo Endochondral Ossification Using Mesenchymal Stem Cells
Published on: July 14, 2023
Efficient engineering of vascularized ectopic bone from human embryonic stem cell-derived mesenchymal stem cells
Hagit Domev1, Michal Amit, Ilana Laevsky
1The Bruce Rappaport Faculty of Medicine, The Sohnis and Forman Families Stem Cell Center, Technion-Israel Institute of Technology, Haifa, Israel.
Tissue Engineering. Part A
|June 27, 2012
Summary
Human embryonic stem cells (hESCs) offer a reproducible source for generating human mesenchymal stem cells (hMSCs). These hESC-derived MSCs differentiate into various cell types, aiding tissue engineering and bone repair.
Area of Science:
- Stem cell biology
- Regenerative medicine
- Tissue engineering
Background:
- Human mesenchymal stem cells (hMSCs) from adult/fetal tissues have variable yield and quality.
- Large-scale, pure populations of lineage-restricted stem cells are needed for cell therapy and tissue engineering.
- Human embryonic stem cells (hESCs) present a potential alternative source for reproducible hMSC generation.
Purpose of the Study:
- To develop efficient protocols for deriving human mesenchymal stem cells (hMSCs) from human embryonic stem cells (hESCs).
- To characterize the differentiation potential of hESC-derived hMSCs.
- To evaluate the in vivo bone formation and vascularization capacity of hESC-derived osteoblasts.
Main Methods:
- Developed differentiation protocols using coculture with murine OP9 stromal cells and a feeder-free system.
- Quantified hMSC generation and characterized cell surface markers (CD105, CD90, CD29, CD44).
- Assessed in vitro differentiation into adipogenic, chondrocytic, and osteogenic lineages, including osteocalcin and VEGF secretion.
- Evaluated ectopic bone formation and vascularization in vivo using Matrigel implants.
Main Results:
- Protocols yielded up to 49% human mesenchymal stem cells (hMSCs) from human embryonic stem cells (hESCs).
- hMSCs expressed key surface markers and demonstrated robust in vitro differentiation.
- hMSC-derived osteoblasts secreted osteocalcin and VEGF, formed ectopic bone in vivo, and induced blood vessel formation.
Conclusions:
- Efficient protocols for generating purified hMSCs from hESCs have been established.
- hESC-derived MSCs possess multipotent differentiation capabilities, particularly towards osteoblasts.
- These findings support the use of hESC-derived MSCs for developing bone repair strategies and regenerative medicine applications.
