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Porcine dendritic cells generated in vitro: morphological, phenotypic and functional properties.
C P Carrasco1, R C Rigden, R Schaffner
1Institute of Virology and Immunoprophylaxis, Mittelhausern, Switzerland.
Immunology
|October 31, 2001
Summary
This study characterizes porcine dendritic cells (DCs) generated in vitro. Porcine DCs share similarities with human DCs but uniquely retain CD14 and CD16 markers, impacting immune regulation understanding.
Area of Science:
- Immunology
- Cell Biology
Background:
- Dendritic cells (DCs) are crucial for immune regulation and antigen presentation.
- Knowledge regarding porcine DCs remains limited, hindering comparative immunology and disease research.
Purpose of the Study:
- To characterize porcine dendritic cells (DCs) generated in vitro from two distinct sources.
- To investigate the surface markers and functional capabilities of these porcine DCs.
Main Methods:
- Generated bone marrow-derived DCs (BM-DCs) using granulocyte-macrophage colony-stimulating factor (GM-CSF) +/- tumor necrosis factor-alpha (TNF-alpha).
- Generated monocyte-derived DCs (Momicron-DCs) using GM-CSF and interleukin-4 (IL-4).
- Analyzed cell morphology, surface marker expression (MHC class II, SWC3, CD1, CD80/86, CD14, CD16), and T-cell stimulatory capacity via mixed leucocyte reactions and antigen presentation assays.
Main Results:
- Both BM-DCs and Momicron-DCs exhibited dendritic morphology and expressed MHC class II, SWC3, CD1, CD80/86, CD14, and CD16.
- TNF-alpha enhanced BM-DC yield and T-cell stimulatory capacity.
- Porcine DCs demonstrated potent T-cell stimulatory capacity, inducing interferon-gamma and IL-4 responses without T helper cell polarization.
- CD14 on porcine DCs showed functional differences from monocytes, and CD16 functioned as a low-affinity Fc receptor.
- Mature and immature porcine DCs consistently expressed CD14 and CD16, a notable difference from other species.
Conclusions:
- In vitro generated porcine DCs share functional and phenotypic characteristics with DCs from other species.
- The persistent expression of CD14 and CD16 on porcine DCs represents a significant distinction and warrants further investigation into their specific roles in porcine immunity.