Related Experiment Videos
Human non-transformed monocyte-derived macrophage cell lines
J M Sechler1, M K Warren, J I Gallin
1Bacterial Diseases Section, National Institute of Allergy and Infectious Diseases, Bethesda, MD 20892.
Abstract:
We have demonstrated that human blood monocyte-derived macrophages can be passaged from primary cultures and replicate. Passaged cells have typical macrophage characteristics: they are non-specific esterase positive, phagocytic, and respond to 3 days of treatment with interferon-gamma with enhanced production of superoxide on stimulation with PMA. The passaged cells express Fc, CR1, CR3 and FMLP receptors. Both primary and passaged cultures constitutively produce CSF-1 after 3 weeks in culture. Cultures studied between 7 and 16 weeks in culture produce 3712 +/- 478 U of CSF-1 per 10(6) cells. Randomly selected lines were examined to look for cell proliferation by looking at numbers of cells over time and by labelling cells with tritiated thymidine to determine the number of cells synthesizing DNA. In addition, the cells can be frozen at the time of isolation and stored for at least 1 year, and then thawed and shown to retain functional activity. Human monocyte-derived macrophages can be cultured as finite cell lines.
Insights
Human monocyte-derived macrophages (MDMs) can be cultured as finite cell lines. These passaged MDMs retain key macrophage characteristics and functional activity, offering a valuable research tool.
Area of Science:
- Immunology
- Cell Biology
Background:
- Primary human monocyte-derived macrophages (MDMs) are crucial immune cells.
- Establishing stable, long-term cell lines from primary MDMs presents challenges.
Purpose of the Study:
- To determine if human monocyte-derived macrophages can be cultured as finite cell lines.
- To characterize the properties and functionality of passaged MDMs.
Main Methods:
- Primary human MDMs were cultured and passaged.
- Cells were assessed for macrophage characteristics (esterase positivity, phagocytosis, receptor expression).
- Interferon-gamma and PMA stimulation were used to evaluate functional responses.
- Cell proliferation was assessed by cell counting and tritiated thymidine labeling.
- Cryopreservation and thawing were performed to test long-term storage viability.
Main Results:
- Passaged MDMs exhibited typical macrophage characteristics, including esterase positivity and phagocytosis.
- Cells responded to interferon-gamma with enhanced superoxide production upon PMA stimulation.
- Fc, CR1, CR3, and FMLP receptors were expressed on passaged cells.
- Both primary and passaged cultures constitutively produced colony-stimulating factor-1 (CSF-1).
- Proliferation was confirmed through cell counting and DNA synthesis assays.
- Cryopreserved MDMs retained functional activity after thawing.
Conclusions:
- Human monocyte-derived macrophages can be successfully cultured as finite cell lines.
- Passaged MDMs maintain essential macrophage functions and receptor expression.
- These cell lines offer a reproducible and stable model for studying macrophage biology and function.