DC2.4

The DC2.4 cell line is an immortalized mouse dendritic cell line that originates from bone marrow. It is commonly used to study dendritic cell (DC) biology, immune responses, and the development of immunotherapies. DC2.4 cells are characterized by their role as antigen-presenting cells (APCs) and are known to express typical surface markers of dendritic cells, such as CD11c and MHC class I molecules. However, they exhibit an immature phenotype under standard culture conditions, with low expression of MHC class II and costimulatory molecules like CD40 and CD80. This makes them useful for investigating the mechanisms and stimuli required for DC maturation and their subsequent immune functions.

Studies have shown that specific stimuli can induce maturation of DC2.4 cells. Notably, exposure to interferon-gamma (IFN-γ) leads to significant upregulation of MHC class II, CD40, CD80, and CCR7, as well as increased cytokine secretion, including IL-6, IL-12, and TNF-α. IFN-γ-matured DC2.4 cells have been demonstrated to effectively activate CD8+ cytotoxic T cells both in vitro and in vivo, enhancing antitumor immunity. For instance, IFN-γ-treated, antigen-pulsed DC2.4 cells have been shown to induce robust CD8+ T cell responses and provide protective antitumor effects in mouse models. This highlights the cell line's utility in cancer immunotherapy research and vaccine development.

Additionally, DC2.4 cells have been employed to study host-pathogen interactions, as their response to various immune challenges can mimic aspects of the innate immune system's activation. The analysis of exosomal miRNA profiles from DC2.4 cells, especially when infected with pathogens like Toxoplasma gondii, has provided insights into the molecular mechanisms underlying dendritic cell signaling and immune communication. The differential expression of exosomal miRNAs in response to infection suggests potential roles in modulating host immunity and highlights the utility of DC2.4 in exosome and RNA-based immune research.

37°C, 5% CO₂, humidified atmosphere.

1. Confirm that the vial remains deeply frozen upon delivery, as cells are shipped on dry ice to maintain optimal temperatures during transit.

2. Upon receipt, either store the cryovial immediately at temperatures below -150°C to ensure the preservation of cellular integrity, or proceed to step 3 if immediate culturing is required.

3. For immediate culturing, swiftly thaw the vial by immersing it in a 37°C water bath with clean water and an antimicrobial agent, agitating gently for 40-60 seconds until a small ice clump remains.

4. Perform all subsequent steps under sterile conditions in a flow hood, disinfecting the cryovial with 70% ethanol before opening.

5. Carefully open the disinfected vial and transfer the cell suspension into a 15 ml centrifuge tube containing 8 ml of room-temperature culture medium, mixing gently.

6. Centrifuge the mixture at 300 x g for 3 minutes to separate the cells and carefully discard the supernatant containing residual freezing medium.

7. Gently resuspend the cell pellet in 10 ml of fresh culture medium. For adherent cells, divide the suspension between two T25 culture flasks; for suspension cultures, transfer all the medium into one T25 flask to promote effective cell interaction and growth.

8. Adhere to established subculture protocols for continued growth and maintenance of the cell line, ensuring reliable experimental outcomes.

Mycoplasma contamination is excluded using both PCR-based assays and luminescence-based mycoplasma detection methods.

To ensure there is no bacterial, fungal, or yeast contamination, cell cultures are subjected to daily visual inspections.

For long-term preservation, place vials in vapor-phase liquid nitrogen at about −150 to −196 °C. Storage at −80 °C is acceptable only as a short interim step before transfer to liquid nitrogen.

Cryopreserved cell lines are shipped on dry ice in validated, insulated packaging with sufficient refrigerant to maintain approximately −78 °C throughout transit. On receipt, inspect the container immediately and transfer vials without delay to appropriate storage.

At Cytion, we stand behind the quality and viability of our products. We guarantee that our cells will be viable at the start of culture for 60 days after shipment from our facilities. We assure that all materials conform to the specifications described in the Certificate of Analysis and/or Product Sheet.

For full details, please refer to our Warranty Statement.