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Quantification of Autoreactive Antibodies in Mice upon Experimental Autoimmune Encephalomyelitis

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Genetic background of multiple sclerosis.

A Dessa Sadovnick¹

¹Department of Medical Genetics, University of British Columbia, Vancouver, Canada. sadovnik@infinet.net

Autoimmunity Reviews

|May 31, 2011

Summary

This summary is machine-generated.

Genetic and environmental factors interact to influence susceptibility to common complex diseases like multiple sclerosis (MS). Specific HLA gene variations significantly increase MS risk, highlighting the complexity of disease development.

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Comprehensive Autopsy Program for Individuals with Multiple Sclerosis

Comprehensive Autopsy Program for Individuals with Multiple Sclerosis

Published on: July 19, 2019

Area of Science:

Genetics
Immunology
Epidemiology

Background:

Multiple sclerosis (MS) is a common complex disease influenced by genetic and environmental factors.
Susceptibility involves genetic, environmental, stochastic, and epigenetic effects, often interacting.
The Canadian Collaborative Project on Genetic Susceptibility to MS (CCPGSMS) is a large, population-based study.

Purpose of the Study:

To investigate genetic and environmental contributions to MS susceptibility.
To identify specific genetic associations, particularly within the MHC class II region.
To explore gene-gene and gene-environment interactions in MS etiology.

Main Methods:

Analysis of data from over 30,000 families with at least one MS member from the CCPGSMS.
Fine-mapping of the MHC class II association to a specific extended HLA haplotype.
Statistical analysis to determine relative risk and interaction effects.

Main Results:

No general propensity to autoimmune disease found in MS families.
Gender of patient and informant is a critical factor to control for in studies.
The HLA-DRB5*0101-HLA-DRB1*1501-HLA-DQA1*0102-HLA-DQB1*0602 haplotype confers a 3-fold increased risk; homozygosity increases risk over 6-fold.
Complex interactions involving HLA loci (epistasis, cis/trans effects, parent-of-origin) and potential interactions with EBV and vitamin D were observed.

Conclusions:

Common complex disease susceptibility, exemplified by MS, arises from intricate interactions between genes, the environment, and gene-environment interplay.
Controlling for demographic factors like gender is crucial in genetic susceptibility studies.
Specific HLA haplotypes are significant risk factors for MS, but their effects are modulated by complex interactions.