Microglia centered pathogenesis in ALS: insights in cell interconnectivity.

Area of Science:

• Neuroscience
• Cell Biology
• Pathology

Background:

• Amyotrophic lateral sclerosis (ALS) is a progressive motor neuron (MN) disease of unknown cause.
• While MN loss is central, non-cell-autonomous mechanisms involving glial cells are increasingly recognized.
• Microglia exhibit dual roles, potentially protective early on but neurotoxic when activated.

Purpose of the Study:

• To review the role of glial cells, particularly microglia, in ALS pathology.
• To discuss the impact of neuroinflammation and microglial phenotypes on disease progression.
• To explore intercellular communication disruptions and potential therapeutic targets in ALS.

Main Methods:

• Review of existing literature and data from transgenic SOD1G93A rodent models.
• Analysis of glial cell contributions (microglia, astroglia, oligodendrocytes, etc.) to ALS.
• Examination of neuroinflammation, cell-cell communication, neurovascular disruption, and exosome trafficking.

Main Results:

• Glial cells, especially microglia, significantly modulate ALS pathology through complex interactions.
• Dysfunctional cell-cell communication, neuroinflammation, and neurovascular issues are implicated.
• Both beneficial and harmful influences of various glial subtypes (NG2 cells, oligodendrocytes, Schwann cells) are observed.

Conclusions:

• Intercellular perturbations are central to ALS pathogenesis.
• Targeting these complex cell interactions and communication pathways offers potential for novel ALS therapeutics.
• Further research into glial-neuronal cross-talk is crucial for effective disease management.