Gray matter involvement in multiple sclerosis

Area of Science:

• Neuroscience
• Neurology

Background:

• Gray matter (GM) involvement is present from the earliest stages of multiple sclerosis (MS).
• Gray matter atrophy progresses faster than white matter (WM) atrophy in early MS.
• Cortical demyelination can be extensive in MS and may occur independently of WM lesions.

Purpose of the Study:

• To review the current understanding of gray matter pathology in multiple sclerosis.
• To highlight the significance of GM involvement in MS pathogenesis and clinical presentation.

Main Methods:

• Literature review of studies on gray matter involvement in multiple sclerosis.
• Analysis of existing data on GM atrophy rates and their relationship with WM changes.
• Synthesis of findings regarding the clinical impact of GM pathology.

Main Results:

• Gray matter pathology, including cortical demyelination, is extensive in MS and may precede WM lesion formation.
• GM involvement is associated with physical disability, fatigue, and cognitive impairment.
• GM disease may explain the dissociation between inflammatory markers and disease progression in MS.

Conclusions:

• Gray matter damage is a critical component of multiple sclerosis pathogenesis, potentially initiating the disease process.
• Understanding GM pathology is essential for explaining clinical manifestations and disease progression in MS.
• Further research into GM pathology, neuronal, and axonal involvement is necessary to fully elucidate MS etiology and pathogenesis.