Missing links in multiple sclerosis etiology. A working connecting hypothesis

Area of Science:

• Neuroimmunology
• Virology
• Immunology

Background:

• The etiology of multiple sclerosis (MS) remains largely unknown.
• Existing research points to various mechanistic events but lacks a comprehensive link.
• Key MS characteristics include altered Blood-Brain Barrier (BBB) selectivity, association with Epstein-Barr virus (EBV) status, and global distribution patterns.

Purpose of the Study:

• To identify new factors potentially linking known characteristics of MS.
• To propose a unifying hypothesis for MS etiology based on current literature.
• To offer novel explanations for the geographical distribution of MS.

Main Methods:

• Literature review and synthesis of scattered data.
• Development of a novel etiological hypothesis for MS.
• Analysis of potential roles of heterophilic antibodies and EBV infection.

Main Results:

• A hypothesis is proposed linking increased anti-Neu5Gc antibodies and EBV-infected T and B cells to MS etiology.
• Anti-Neu5Gc antibodies are suggested to activate BBB endothelial cells.
• The hypothesis integrates EBV status, BBB alterations, and geographical distribution.

Conclusions:

• Concomitant increases in anti-Neu5Gc antibodies and EBV-infected immune cells may play a significant role in MS pathogenesis.
• This hypothesis provides a framework for understanding MS etiology and its epidemiological patterns.
• Further research is warranted to validate these proposed mechanisms in MS development.