Advances in Visualizing Microglial Cells in Human Central Nervous System Tissue.

Area of Science:

• Neuroscience
• Immunology
• Pathology

Background:

• Neuroinflammation is a key pathological process in central nervous system (CNS) diseases.
• Microglia are the primary immune cells in the CNS and critical mediators of neuroinflammation.
• Accurate identification of microglia and their activation states is essential for understanding CNS pathophysiology.

Purpose of the Study:

• To review current methods for identifying microglia in CNS tissue.
• To highlight the importance of microglia-specific markers for accurate diagnosis and research.
• To discuss potential misinterpretations arising from non-specific staining techniques.

Main Methods:

• Review of various staining techniques used for microglia visualization in rodent and human CNS tissue.
• Focus on immunostaining methods and the evolution from morphological identification to antigen-specific markers.
• Discussion of microglia-specific markers, including P2Y12 and TMEM119, and other activation-related markers.

Main Results:

• Immunostaining is the most common method for visualizing microglia.
• Reliance has shifted from morphology to selective antigen expression for higher certainty.
• P2Y12 and TMEM119 are currently the most microglia-specific markers identified.
• Other markers can indicate microglia activation and phagocytic states, useful for neuroimaging.

Conclusions:

• Accurate microglia identification is vital for CNS disease research.
• Microglia-specific markers like P2Y12 and TMEM119 enhance diagnostic certainty.
• Awareness of marker selectivity is crucial to avoid misinterpretation in CNS tissue analysis.