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Rapid Isolation of BMPR-IB+ Adipose-Derived Stromal Cells for Use in a Calvarial Defect Healing Model
Published on: February 24, 2017
Allogeneic adipose-derived stem cells with low immunogenicity constructing tissue-engineered bone for repairing bone
Ming-liang Ren1, Wei Peng, Zai-liang Yang
1Department 4, State Key Laboratory of Trauma, Burn and Combined Injury, Research Institute of Surgery and Daping Hospital, Third Military Medical University, Chongqing, China.
Genetically modified adipose-derived stem cells (ADSCs) show reduced immunogenicity, enabling effective bone repair in pigs without compromising safety or efficacy compared to autologous cells.
Area of Science:
- Regenerative Medicine
- Immunology
- Biotechnology
Background:
- Ideal cells for tissue engineering require easy obtainment, safety, immune privilege, self-renewal, and multipotency.
- Adipose-derived stem cells (ADSCs) are promising but allogeneic mesenchymal stem cell immunogenicity limits long-term use.
- Reducing immunogenicity is key for successful allogeneic cell therapies.
Purpose of the Study:
- To engineer ADSCs with reduced immunogenicity for tissue regeneration.
- To evaluate the biosafety and biological characteristics of genetically modified ADSCs.
- To assess the efficacy of allogeneic ADSCs-US2/US3 in repairing bone defects.
Main Methods:
- Introduced human cytomegalovirus US2/US3 genes into ADSCs to decrease MHC I expression.
- Assessed biosafety and biological characteristics of ADSCs-US2/US3.
- Constructed tissue-engineered bone using ADSCs-US2/US3 for bone defect repair in pigs.
Main Results:
- ADSCs-US2/US3 exhibited similar biosafety and biological characteristics to normal ADSCs.
- No significant differences in bone repair efficacy or healing time were observed between allogeneic ADSCs-US2/US3 and autologous ADSC groups.
- Reduced T-cell activation was observed in recipient animals due to decreased MHC I expression.
Conclusions:
- Allogeneic ADSCs-US2/US3 demonstrate biological safety, low immunogenicity, and effective osteogenesis.
- Genetically modified ADSCs offer a promising solution for allogeneic cell transplantation in tissue regeneration.
- Minimally immunogenic ADSCs are crucial for advancing tissue-regenerative approaches.
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