Hypothesis of double polarization.

Area of Science:

• Neuroscience
• Cell Biology
• Genetics

Background:

• Neurological disorders are often linked to mutations in ubiquitously expressed proteins.
• Current hypotheses focus on impaired intra-axonal transport as the cause of tissue specificity in these disorders.

Purpose of the Study:

• To investigate the potential role of glial cells in neurological disorders.
• To explore the concept of a "double long-polarized cellular system" in the nervous system.

Main Methods:

• Review of existing literature on axonal and glial transport.
• Analysis of the structural and functional properties of myelinating glial cells (Schwann cells and oligodendrocytes).

Main Results:

• Glial cells, like neurons, are long and polarized, requiring intracellular transport.
• Non-compacted myelin regions (incisures, loops) represent potential sites for transport issues in glia.
• The nervous system relies on both axonal and glial transport, creating a "double" system.

Conclusions:

• Impaired axonal transport alone may not fully explain neurological disorders.
• Glial transport deficits and compromised neuronal-glial interactions could significantly contribute to nervous system vulnerability.
• A comprehensive understanding requires considering both neuronal and glial transport mechanisms.