More than a marker: potential pathogenic functions of MAP2

Area of Science:

• Neuroscience
• Cell Biology
• Molecular Biology

Background:

• Microtubule-associated protein 2 (MAP2) is a key cytoskeletal regulator in neuronal dendrites.
• MAP2 influences microtubule dynamics, neurite outgrowth, and synaptic functions, similar to MAP Tau.
• While Tau pathology is well-studied, MAP2 dysregulation in neurodegenerative and neuropsychiatric disorders remains underexplored.

Purpose of the Study:

• To review the structure and functions of MAP2.
• To explore mechanisms of MAP2 regulation, including post-translational modifications.
• To assess evidence of MAP2 dysregulation in brain disorders and propose its contribution to disease phenotypes.

Main Methods:

• Literature review of MAP2 structure, function, and regulation.
• Analysis of existing immunohistochemical and proteomic data on MAP2 in brain disorders.
• Conceptualization of
• MAP2opathy
• based on proposed pathogenic pathways.

Main Results:

• MAP2 plays vital roles in neurite outgrowth, synaptic plasticity, and protein homeostasis.
• Alterations in MAP2 expression, splicing, and stability are observed across diverse neurological and psychiatric conditions.
• Post-translational modifications represent a significant regulatory mechanism for MAP2 function.

Conclusions:

• MAP2 dysregulation is a potential common pathogenic mechanism in multiple brain disorders.
• The concept of
• MAP2opathy
• offers a novel framework for understanding these conditions.
• Further research into MAP2's role could reveal new therapeutic targets for neurological and psychiatric diseases.