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New genes linked to multiple sclerosis identified


By Craig Boerner
February 2012

An international team of scientists has identified 29 new genetic variants linked to multiple sclerosis (MS), providing key insights into the biology of the debilitating neurological disease.

Vanderbilt University Medical Center’s Center for Human Genetic Research (CHGR) played an important role in the research published in August 2011 in the journal Nature, which represents the largest MS genetics study ever undertaken and effectively doubles the number of genes known to be associated with the disease.

“We now know just how complex multiple sclerosis is,” said Jonathan Haines, Ph.D., director of the CHGR and one of the principal researchers in this effort. “These new genes give us many new clues as to what is happening in MS and will guide our research efforts for years to come.”
Researchers studied the DNA from 9,772 individuals with multiple sclerosis and 17,376 unrelated healthy controls.

They were able to confirm 23 previously known genetic associations
and identified another 29 new genetic variants (and an additional five that are strongly suspected) conferring susceptibility to the disease.

Many genes implicated in the study are relevant to the immune system, shedding light on the immunological pathways that underlie the development of multiple sclerosis.

One-third of the genes identified in the study have previously been implicated in playing a role in other autoimmune diseases such as Crohn’s disease and type 1 diabetes, Haines said.

Previous studies have also suggested a link between vitamin D deficiency and an increased risk of multiple sclerosis.

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