[Translational Research on Neuropsychiatric Disorders: Focusing on Microglia Hypothesis]

Area of Science:

• Neuroscience
• Immunology
• Psychiatry

Background:

• Microglia, the primary immune cells in the central nervous system, play a crucial role in brain homeostasis.
• Recent evidence implicates microglial dysfunction in the pathophysiology of major psychiatric disorders, including schizophrenia, depression, and autism spectrum disorder.
• Understanding the specific roles of microglia in these conditions is essential for developing effective therapeutic strategies.

Purpose of the Study:

• To introduce the "microglia hypothesis" for psychiatric disorders.
• To present a novel translational research approach utilizing induced microglia-like (iMG) cells derived from human blood.
• To highlight the potential of iMG cells as a tool for studying psychiatric disorders.

Main Methods:

• The review discusses the "microglia hypothesis" for psychiatric disorders.
• A novel method for generating microglia-like (iMG) cells from human peripheral blood monocytes is presented.
• The induction process involves using two specific cytokines: granulocyte-macrophage colony-stimulating factor (GM-CSF) and interleukin-34 (IL-34).
• The differentiation of monocytes into iMG cells is achieved within a two-week timeframe.

Main Results:

• The microglia hypothesis provides a framework for understanding the contribution of these immune cells to psychiatric conditions.
• The described method successfully generates iMG cells from readily accessible human blood samples.
• These iMG cells represent a viable in vitro model for studying microglia in the context of psychiatric disorders.
• The rapid two-week differentiation protocol facilitates efficient research.

Conclusions:

• Microglial involvement is a significant factor in the pathophysiology of psychiatric disorders.
• The development of iMG cells from human blood offers a promising translational tool for psychiatric research.
• This approach facilitates the study of microglia-related mechanisms in conditions like schizophrenia, depression, and autism.