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Updated: Oct 19, 2025
Culture of myeloid dendritic cells from bone marrow precursors
Published on: July 25, 2008
The CD200/CD200R mechanism in mesenchymal stem cells' regulation of dendritic cells
Yulei Zhao1, Guohong Su1, Qing Wang1
1The Second Department of Hematology, Cangzhou Central Hospital 16 West Xinhua Road, Yunhe, Cangzhou, China.
Insights
Mesenchymal stem cells (MSC) regulate dendritic cell (DC) maturation via the CD200/CD200R pathway. This pathway primarily impacts the transition from immature to mature dendritic cells, influencing immune responses.
Area of Science:
- Immunology
- Cell Biology
- Stem Cell Research
Background:
- Mesenchymal stem cells (MSC) possess immunomodulatory properties.
- Dendritic cells (DC) are crucial antigen-presenting cells in immune responses.
- The CD200/CD200R pathway is implicated in immune regulation.
Purpose of the Study:
- To elucidate the role of the CD200/CD200R pathway in MSC-mediated regulation of DC.
- To investigate how MSC influence DC differentiation and maturation.
- To determine the specific stage of DC development affected by MSC.
Main Methods:
- Cultured bone marrow MSC and isolated peripheral blood mononuclear cells (PBMC) and DC.
- Established an in vitro immune response model.
- Utilized anti-CD200 blocking antibodies to assess pathway involvement in DC maturation and function.
Main Results:
- MSC co-culture inhibited the differentiation of immature DC (imDC) to mature DC (mDC).
- The CD200/CD200R pathway was identified as a key mediator of MSC's inhibitory effect on DC maturation.
- MSC reduced DC maturation markers and their ability to stimulate PBMC, an effect reversed by anti-CD200 antibodies.
Conclusions:
- MSC inhibit DC maturation primarily through the CD200/CD200R pathway.
- This pathway significantly influences the imDC to mDC transition.
- Targeting the CD200/CD200R pathway could modulate immune responses mediated by MSC and DC.
Objective:
To investigate the CD200/CD200R pathway mechanism in mesenchymal stem cells' (MSC) regulation of dendritic cells (DC) (MSc).
Methods:
We collected marrow samples from 40 patients admitted to our hospital from January 2018 to December 2019. The bone marrow MSCs were cultivated, and the peripheral blood mononuclear cells (PBMC) and peripheral blood DC were isolated to establish an in vitro immune response model. The expressions of the CD200 molecule on the surface of MSC were measured. Anti-CD200 blocking antibodies were added to the culture system to observe the effect of the PBMC differentiation and the immature DC (imDC) to mature DC (mDC). Then the impact of the different positive rates of CD200 in the same MSC on imDC maturity was measured.
Results:
After adding mitogen pHA, the IL-4, IL-10, and TNF-α secretions were increased (all P<0.05), and the OD value of the PBMC+pHA group was higher than it was in the PBMC group. After stimulated by pHA, the CD200 of the MSC group was higher than it was in the MSC+PBMC group (P<0.05). The MSC+PBMC group co-culture inhibited the development of imDC to mDC. Adding anti-CD200 antibodies to the MSC+PBMC co-culture system, MSC could still inhibit the differentiation of PBMC to imDC, and MSC had a significant inhibition effect on imDC to mDC maturation (P=0.006). The addition of MSC reduces the maturation markers on the surface of mDC (P<0.05). The addition of MSC inhibited the ability of mDC to stimulate PBMC (POD<0.05) and decreased the IL-12 (PIL-12<0.05) levels. The addition of the anti-CD200 antibody increased the proliferation ability of mDC to stimulate PBMC (POD<0.05), and it also increased the IL-12 levels in mDC (PIL-12<0.05). The expression of the DC mature immune phenotype in the CD200 high expression group was weak (PCD83, CD86<0.05).
Conclusion:
The mechanism by which MSC inhibits DC may be achieved through the CD200/CD200R pathway, and the CD200/CD200R pathway mainly acts on the process from imDC to mDC.
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