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Related Concept Videos

Glial Cells01:04

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Glia, or neuroglia, are vital support cells that assist neurons in their functions. The term "glia" originates from the Greek word for "glue," reflecting their role in holding the nervous system together. These cells can be categorized into six types: four in the central nervous system (CNS) and two in the peripheral nervous system (PNS).
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In the CNS, neurogenesis, the birth of new neurons from stem cells, is limited to the hippocampus in adults. In other regions of the brain and spinal cord, neurogenesis is almost non-existent due to inhibitory influences from neuroglia, especially oligodendrocytes, and the absence of growth-stimulating cues. The myelin produced by oligodendrocytes in the CNS inhibits neuronal regeneration. Furthermore, astrocytes proliferate rapidly after neuronal damage, forming scar tissue that physically...
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The myelin sheath is a multilayered lipid and protein covering that insulates the axon of a neuron, enhancing the speed of nerve impulse conduction. Axons without this sheath are referred to as unmyelinated. Two types of neuroglia, Schwann cells in the peripheral nervous system (PNS) and oligodendrocytes in the central nervous system (CNS) are responsible for producing myelin sheaths.
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Rapid and Refined CD11b Magnetic Isolation of Primary Microglia with Enhanced Purity and Versatility
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Microglia: Architects of the Developing Nervous System.

Jeffrey L Frost1, Dorothy P Schafer1

  • 1Department of Neurobiology, University of Massachusetts Medical School, 364 Plantation Street, Worcester, MA 01605, USA.

Trends in Cell Biology
|March 24, 2016
PubMed
Summary

Microglia, the central nervous system (CNS) immune cells, are crucial for brain development, regulating cell number, circuit formation, and myelination. Their early role impacts behavior and neurological disorders.

Keywords:
central nervous systemdevelopmentmicroglia

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Area of Science:

  • Neuroscience
  • Developmental Biology
  • Immunology

Background:

  • Microglia are the primary immune cells residing in the central nervous system (CNS).
  • They constitute 5-10% of all cells within the CNS.
  • Emerging evidence highlights their critical role in early brain development.

Purpose of the Study:

  • To review the multifaceted roles of microglia in CNS development.
  • To discuss the implications of microglial functions in neural circuit formation and behavior.
  • To explore the connection between microglial developmental roles and neurological disorders.

Main Methods:

  • Review of recent scientific literature and findings.
  • Analysis of studies on microglial involvement in embryonic brain development.
  • Synthesis of research on microglial regulation of cellular and circuit development.

Main Results:

  • Microglia colonize the embryonic brain before other cell types differentiate.
  • They actively regulate CNS cell number, spatial patterning, myelination, and neural circuit development.
  • Microglial functions during development are linked to behavioral modulation.

Conclusions:

  • Microglia are essential regulators of central nervous system development.
  • Their developmental functions have significant implications for understanding and potentially treating neurological disorders.
  • Further research into microglial roles can illuminate mechanisms underlying brain development and disease.