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Characterization of Human Monocyte Subsets by Whole Blood Flow Cytometry Analysis
Published on: October 17, 2018
Immunophenotypic characterization of human monocyte subsets: possible implications for cardiovascular disease
E Shantsila1, B Wrigley, L Tapp
1Haemostasis Thrombosis and Vascular Biology Unit, University of Birmingham Centre for Cardiovascular Sciences, City Hospital, Birmingham, UK. e.shantsila@bham.ac.uk
Journal of Thrombosis and Haemostasis : JTH
|February 24, 2011
Summary
Researchers identified three distinct human monocyte subsets (Mon1, Mon2, Mon3) based on surface markers. Monocyte subset Mon2 shows potential as pluripotent progenitor cells, crucial for immunity and repair.
Area of Science:
- Immunology
- Cell Biology
- Hematology
Background:
- Monocytes are key immune cells with diverse roles in immunity, atherogenesis, and tissue repair.
- Understanding monocyte subset heterogeneity is crucial for deciphering their specific functions.
Purpose of the Study:
- To conduct a detailed immunophenotypic and functional characterization of human monocyte subsets.
- To identify and differentiate distinct monocyte populations in healthy volunteers.
Main Methods:
- Flow cytometry was used to analyze surface markers of blood and bone marrow monocyte subsets.
- Functional characterization of blood monocyte subsets included assessing pathway activity, phagocytosis, and cytokine production.
Main Results:
- Three monocyte subsets were identified: CD14(+)CD16(-)CCR2(+) (Mon1), CD14(+)CD16(+)CCR2(+) (Mon2), and CD14(low)CD16(+)CCR2(-) (Mon3).
- Mon2 exhibited high expression of Tie2, CXCR4, CD163, CD115, ICAM-1, VEGF, apolipoprotein B, and ferritin.
- Mon3 showed maximal expression of VCAM-1 and CD204, with lower phagocytic activity and NFκB pathway activity compared to Mon1 and Mon2.
Conclusions:
- The Mon2 subset, with its unique immunophenotype, may represent previously described pluripotent progenitor/pro-angiogenic monocytes.
- Distinct functional properties, including cytokine production, were observed among the three monocyte subsets.
