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06:09
Generation of Immature, Mature and Tolerogenic Dendritic Cells with Differing Metabolic Phenotypes
Published on: June 22, 2016
Endothelial cell-matrix interactions determine maturation of dendritic cells
Heiko Methe1, Shmuel Hess, Elazer R Edelman
1Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA. hmethe@mit.edu
European Journal of Immunology
|June 15, 2007
Summary
Endothelial cell (EC) matrix interactions regulate immune responses. Embedding EC in 3D collagen prevents dendritic cell (DC) maturation, suggesting a novel strategy for immune tolerance in EC implants.
Area of Science:
- Immunology
- Cell Biology
- Biomaterials Science
Background:
- Endothelial cell (EC) implants face immune rejection.
- EC-matrix interactions influence EC fate and immune responses.
- Dendritic cells (DCs) play a key role in immune reactivity.
Purpose of the Study:
- To investigate the hypothesis that EC-driven DC maturation is dependent on EC-matrix contact.
- To explore the impact of 3D matrix-embedded EC on DC maturation and function.
- To determine if EC-matrix interactions can modulate DC-mediated immune responses.
Main Methods:
- Co-culture of dendritic cells (DCs) with allo- and xenogeneic ECs in 2D vs. 3D matrix environments.
- Assessment of DC maturation markers (costimulatory molecules, HLA-DR, CD83) via flow cytometry.
- Evaluation of DC endocytic activity and cytokine-induced maturation.
- Measurement of DC-induced allogeneic lymphocyte proliferation and EC cross-activation.
Main Results:
- DCs exposed to 3D matrix-embedded ECs failed to mature, unlike those with 2D ECs or cytokine cocktails.
- Matrix-embedded ECs retained DC endocytic activity and showed reduced maturation markers (p <0.01).
- 3D matrix-EC interactions inhibited cytokine-induced DC maturation, allogeneic lymphocyte proliferation (p <0.002), and EC cross-activation (p <0.01).
Conclusions:
- EC-matrix contact significantly impacts the ability of ECs to drive DC maturation.
- Embedding ECs within a 3D matrix promotes immune tolerance by inhibiting DC maturation.
- These findings highlight the importance of the endothelial microenvironment in regulating immune acceptance of EC implants.
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