Blood Monocytes and Their Subsets: Established Features and Open Questions

Area of Science:

• Immunology
• Hematology
• Cell Biology

Background:

• Historically, monocyte identification relied on morphology, limiting clinical relevance.
• Standard hematology counters provided limited information on monocyte populations.

Purpose of the Study:

• To detail the current methods for identifying and enumerating blood monocyte subsets.
• To highlight the clinical significance of monocyte subset analysis.

Main Methods:

• Utilizing monoclonal antibodies and flow cytometry for monocyte identification and enumeration.
• Employing specific cell surface markers to differentiate monocytes from dendritic cells.

Main Results:

• Blood monocytes can be reliably subdivided into classical, intermediate, and non-classical subsets.
• Subset analysis reveals informative changes previously undetected by standard methods.

Conclusions:

• Flow cytometry and monoclonal antibodies have revolutionized monocyte analysis.
• Monocyte subset enumeration provides valuable data for disease management and clinical decision-making.