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Updated: Aug 11, 2026
Myelin Oligodendrocyte Glycoprotein (MOG35-55) Induced Experimental Autoimmune Encephalomyelitis (EAE) in C57BL/6 Mice
Published on: April 15, 2014
Molecular mimicry in multiple sclerosis
Mireia Sospedra1, Roland Martin
1Unitat de Neuroimmunologia Clinica, Hospital Universitari Vall d'Hebron, Pg. Vall d'Hebron, 119-129, Barcelona, 08035, Spain.
Abstract:
Two main etiological components are considered important in human autoimmune diseases including multiple sclerosis (MS), first the immunogenetic background and second environmental factors. Among the latter, infectious organisms are probably the most relevant, and epidemiological studies in MS firmly support that viral infections often precede disease exacerbations or the onset of MS. Infectious agents can contribute to disease development or phenotypic expression in different ways. Our focus will be directed on molecular mimicry, i.e. antigenic similarity between structural epitopes or peptide sequences from infectious organisms with those found in self proteins of the host. The intriguing concept of molecular mimicry has evolved substantially since its introduction over 20 years ago. We will summarize the most important developments and discuss puzzling questions, which remain open despite many claims that molecular mimicry is involved in the development of human autoimmune disease after infections or vaccinations.
Insights
Infectious agents and genetic factors contribute to autoimmune diseases like multiple sclerosis (MS). Molecular mimicry, where infections trigger autoimmune responses, is a key area of research.
Area of Science:
- Immunology
- Neuroscience
- Infectious Diseases
Background:
- Autoimmune diseases, such as multiple sclerosis (MS), arise from complex interactions between genetic predisposition and environmental factors.
- Infectious agents are significant environmental triggers, with viral infections frequently preceding MS exacerbations or onset.
Purpose of the Study:
- To explore the role of molecular mimicry in the development of autoimmune diseases following infections or vaccinations.
- To review the evolution of the molecular mimicry concept and address unresolved questions.
Main Methods:
- Review of epidemiological studies and scientific literature on infectious agents and autoimmune diseases.
- Analysis of the molecular mimicry hypothesis, focusing on antigenic similarity between microbial and self-proteins.
Main Results:
- Epidemiological data strongly suggest a link between viral infections and MS onset or exacerbations.
- Molecular mimicry, a mechanism involving cross-reactivity between pathogen and self-antigens, is a prominent hypothesis for infection-induced autoimmunity.
Conclusions:
- Molecular mimicry offers a plausible explanation for how infections can initiate or exacerbate autoimmune conditions like MS.
- Despite advancements, further research is needed to fully elucidate the mechanisms and implications of molecular mimicry in human autoimmune diseases.
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