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Engineering vascular networks in porous polymer matrices
Martin C Peters1, Peter J Polverini, David J Mooney
1Department of Biomedical Engineering, University of Michigan, 5213 Dental School, 1011 North University Avenue, Ann Arbor, Michigan 48109-1078, USA.
Journal of Biomedical Materials Research
|April 12, 2002
Summary
This study shows that combining vascular endothelial growth factor (VEGF) delivery with human microvascular endothelial cell (HMEC) transplantation effectively engineers new blood vessels. This approach significantly enhances vascularization for tissue repair and organ engineering.
Area of Science:
- Biomedical Engineering
- Regenerative Medicine
- Vascular Biology
Background:
- Enhanced vascularization is crucial for treating ischemic tissues and for tissue/organ engineering.
- Current methods require effective strategies for promoting new blood vessel formation.
Purpose of the Study:
- To investigate the combined use of sustained vascular endothelial growth factor (VEGF) delivery and human microvascular endothelial cell (HMEC) transplantation for engineering vascular networks.
- To assess the efficacy of poly(lactic-co-glycolic acid) (PLG) matrices in sustained VEGF release and promotion of angiogenesis.
Main Methods:
- VEGF was incorporated into porous PLG matrices for sustained release.
- HMEC transplantation was performed on PLG matrices in SCID mice.
- Vascularization was quantified by measuring capillary density and human-derived vessel formation.
Main Results:
- PLG matrices released biologically active VEGF, with 64% release within 2 weeks.
- VEGF-releasing matrices increased host capillary density by 260% after 7 days.
- HMEC transplantation on VEGF-releasing matrices resulted in a 160% increase in human-derived blood vessels after 14 days.
Conclusions:
- Sustained, localized VEGF delivery from PLG matrices effectively promotes angiogenesis.
- Combining vasculogenesis (HMEC transplantation) and angiogenesis (VEGF) is a viable strategy for enhanced vascularization.
- This approach offers a novel method for engineering vascular networks in tissue and organ regeneration.