Macrophage Heterogeneity and Plasticity: Impact of Macrophage Biomarkers on Atherosclerosis

Area of Science:

• Immunology
• Cardiovascular Science
• Cell Biology

Background:

• Cardiovascular disease (CVD) is a leading global cause of death.
• Atherosclerosis, the primary driver of CVD, involves complex immune system responses.
• Monocytes and macrophages are crucial immune cells with diverse, adaptable roles in inflammation.

Purpose of the Study:

• To explore the heterogeneity and plasticity of monocytes and macrophages in atherosclerosis.
• To identify key biomarkers associated with distinct monocyte and macrophage phenotypes.
• To highlight the therapeutic potential of modulating these immune cell pathways.

Main Methods:

• Review of current literature on monocyte and macrophage phenotypes in atherosclerosis.
• Analysis of cellular heterogeneity (e.g., classic, intermediate, non-classic monocytes; M1/M2 macrophages).
• Identification of associated molecular biomarkers (e.g., cytokines, transcription factors, microRNAs).

Main Results:

• Monocytes differentiate into distinct phenotypes (classic, intermediate, non-classic) based on microenvironmental cues.
• Macrophages exhibit plasticity, shifting between pro-inflammatory (M1) and anti-inflammatory (M2) profiles.
• Specific biomarkers like IL-10, IL-13, PPAR-γ, LXR, NLRP3 inflammasomes, and microRNAs are linked to these cellular phenotypes.

Conclusions:

• The diverse phenotypes and plasticity of monocytes and macrophages are central to atherosclerosis pathogenesis.
• Targeting specific macrophage-related biomarkers presents a promising avenue for novel CVD therapeutics.
• Modulating these immune cell pathways could lead to effective treatments for atherosclerosis and related cardiovascular diseases.