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Updated: Aug 9, 2026
An In vitro Model to Study Heterogeneity of Human Macrophage Differentiation and Polarization
Published on: June 12, 2013
Growth parameters and rate of expression of some CD markers in sorted and not sorted macrophage cultures
C Voiculescu1, C Avramescu, E Radu
1Faculty of Medicine Craiova, Dept. of Microbiology and Immunology, Craiova, Romania.
Abstract:
Several parameters of in vitro culturing were investigated for two kinds of human macrophages cell fractions, i.e. sorted by flow cytometry and not sorted, as follows:--growth ability during serial in vitro passages, and--percent rate of CD13, CD14 and CD33 expression at different in vitro passage levels. Results point out the ability of sorted cells to survive to a higher number of serial passages. A dramatical loss of CD13 and especially CD33 markers was noticed during culturing within the not sorted cells, as compared to homologous sorted ones.
Insights
Sorted human macrophages exhibit enhanced growth and marker stability in serial cell culture compared to unsorted cells. This finding is crucial for reliable in vitro studies using these immune cells.
Area of Science:
- Immunology
- Cell Biology
Background:
- Human macrophages are critical immune cells with diverse functions.
- Maintaining macrophage characteristics during in vitro culture is challenging.
- Understanding cellular behavior in serial passages is vital for research.
Purpose of the Study:
- To compare the in vitro culturing parameters of sorted versus unsorted human macrophages.
- To assess the growth ability and marker expression of macrophages across serial passages.
Main Methods:
- Human macrophages were fractionated using flow cytometry (sorted) and compared to unsorted fractions.
- Growth ability was evaluated through serial in vitro passages.
- Expression of CD13, CD14, and CD33 markers was quantified at different passage levels.
Main Results:
- Sorted macrophages demonstrated superior survival rates across multiple serial passages.
- Unsorted macrophages showed a significant decline in CD13 and CD33 marker expression during culturing.
- CD14 expression stability was also influenced by the sorting and passage conditions.
Conclusions:
- Flow cytometry sorting enhances the long-term viability and phenotypic stability of human macrophages in vitro.
- Sorted macrophages are more suitable for extended in vitro experimental models.
- The study highlights the importance of cell preparation for reliable macrophage research.
