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Updated: Aug 7, 2026
Generation of Immature, Mature and Tolerogenic Dendritic Cells with Differing Metabolic Phenotypes
Published on: June 22, 2016
[Studies on the properties of dendritic cells from cord blood CD34+ cells and peripheral blood monocytes]
Insights
Generating dendritic cells (DC) ex vivo is crucial for research and clinical use. Both cord blood and peripheral blood can be used as sources for large numbers of typical DC, supporting immunotherapy applications.
Area of Science:
- Immunology
- Cell Biology
- Biotechnology
Background:
- Ex vivo expansion and purification of dendritic cells (DC) are essential for advancing DC research and clinical applications.
- Typical phenotype, morphology, and function of expanded DC are critical for their utility.
Purpose of the Study:
- To investigate optimal methods for ex vivo expansion and purification of dendritic cells (DC) from different sources.
- To compare the efficiency of various cytokine combinations for DC generation.
- To evaluate the phenotype, morphology, and function of generated DC.
Main Methods:
- Isolation of CD34+ cells from umbilical cord blood using magnetic cell sorting (MACS).
- Depletion of T and B cells from peripheral blood mononuclear cells (PBMC) using magnetic beads.
- Induction and expansion of DC using different cytokine combinations (e.g., GM-CSF, TNF-alpha, SCF, FL, IL-4).
- Identification and characterization of DC using flow cytometry (FACS), electron microscopy, light microscopy, and mixed lymphocyte reaction (MLR).
Main Results:
- A combination of GM-CSF + TNF-alpha + SCF + FL yielded a significantly higher percentage of CD1a+ cells (27.18%) from cord blood CD34+ cells compared to GM-CSF alone (0.65%).
- GM-CSF combined with high-dose IL-4 (1,000 U/ml) was most effective for expanding CD1a+ cells (21.8%) from PBMC.
- DC generated from both cord blood and peripheral blood exhibited similar phenotypes and morphologies.
- Both types of DC demonstrated the capacity to stimulate allogeneic T lymphocyte proliferation.
Conclusions:
- Both cord blood and peripheral blood serve as viable sources for generating substantial numbers of typical dendritic cells (DC).
- The choice of source and expansion method can be tailored to specific applications.
- These findings provide a foundation for the clinical immunotherapy utilizing dendritic cells.
Objective:
Ex vivo expansion and purification of dendritic cells(DC) with typical phenotype, morphology and function are critical to the further studies on DC and their clinical application.
Methods:
CD34+ cells were isolated from umbilical cord blood by using a high-gradient magnetic cell sorting system (MACS), and peripheral blood mononuclear cells (PBMC) were depleted of T and B cells by mixing them with T/CD2 and B/CD19 magnetic beads. DC were induced and expanded with different combinations of cytokines. They were identified for their properties by FACS, electronic microscopy, microscopy, and mixed lymphocyte reaction (MLR).
Results:
Cultures of cord blood CD34+ cells with the combination of GM-CSF + TNF-alpha + SCF + FL yielded (27.18 +/- 1.56)% CD1a+ cells, much higher than that (0.65 +/- 0.38)% with GM-CSF alone. The combination of GM-CSF and high dose IL-4(1,000 U/ml) was the most potential for expanding CD1a+ cells [(21.8 +/- 0.32)%] for PBMC. Both of the DC from different sources were similar in phenotype and morphology, and had the capacity to stimulate proliferation of allogeneic T lymphocytes.
Conclusion:
Both of cord blood and peripheral blood are the source for generation of a large number of typical DC, and can be adopted for the application according to different purposes. These results lay foundation for the immunotherapy with DC.
