Isolation and Differentiation of Human Macrophages
Francisco J Rios1, Rhian M Touyz2,3, Augusto C Montezano2
1Institute of Cardiovascular and Medical Sciences, British Heart Foundation Glasgow Cardiovascular Research Centre, University of Glasgow, 126 University Place, Glasgow, G12 8TA, UK. Francisco.Rios@glasgow.ac.uk.
Abstract:
Macrophage subtypes display protective or pathogenic activities in vascular lesions. They recognize and engulf modified lipids, accumulate in the arterial intima, contributing to the atherosclerosis development. In the heart, vascular tissues and perivascular adipose tissues, there is increasing evidence that macrophages play a role in endothelial dysfunction, vascular inflammation and remodeling. In this chapter we describe protocols to isolate human monocytes from peripheral blood mononuclear cell and how to differentiate them into macrophages by using growth factors (granulocyte-macrophage colony-stimulating factor-GM-CSF or colony-stimulating factor-M-CSF) or by different cell culture medium concentration. We also describe how to indentify different macrophage activation phenotypes.
Insights
This study details methods for isolating human monocytes and differentiating them into macrophages. It also covers identifying macrophage phenotypes involved in vascular diseases like atherosclerosis.
Area of Science:
- Immunology
- Cardiovascular Biology
- Cell Biology
Background:
- Macrophages are key players in vascular lesions, exhibiting both protective and pathogenic roles.
- These immune cells contribute to atherosclerosis by engulfing modified lipids and accumulating in the arterial intima.
- Macrophages are implicated in endothelial dysfunction, vascular inflammation, and remodeling within cardiac and vascular tissues.
Purpose of the Study:
- To provide protocols for isolating human monocytes from peripheral blood mononuclear cells.
- To describe methods for differentiating monocytes into macrophages using specific growth factors or culture conditions.
- To outline techniques for identifying distinct macrophage activation phenotypes.
Main Methods:
- Isolation of human monocytes from peripheral blood mononuclear cell (PBMC) fractions.
- Differentiation of monocytes into macrophages using granulocyte-macrophage colony-stimulating factor (GM-CSF) or macrophage colony-stimulating factor (M-CSF).
- Alternative differentiation using varying cell culture medium concentrations.
- Identification of macrophage activation states.
Main Results:
- Established protocols for obtaining human monocyte-derived macrophages.
- Demonstrated differentiation capabilities using defined growth factors and culture media.
- Provided methods for characterizing macrophage phenotypes.
Conclusions:
- The described protocols enable the generation and characterization of human macrophages for research.
- Understanding macrophage subtypes and activation states is crucial for studying vascular diseases.
- These methods support further investigation into the role of macrophages in atherosclerosis and vascular health.
