The first genetic marker for MS severity has been identified, opening the door to treatments for long-term disability.<\/p>\n
For the first time, a study of more than 22,000 people with multiple sclerosis has discovered a genetic variant associated with faster disease progression, which can rob patients of their mobility and independence over time.<\/p>\n
Multiple sclerosis (MS) is the result of the immune system mistakenly attacking the brain and the spinal cord, resulting in symptom flares known as relapses as well as longer-term degeneration, known as progression.\u00a0 Despite the development of effective treatments for relapses, none can reliably prevent the accumulation of disability.<\/p>\n
The findings, just published in the prestigious\u00a0Nature\u00a0<\/em>journal, point to a genetic variant that increases disease severity, providing the first real progress in understanding and eventually fighting this aspect of MS.<\/p>\n \u201cInheriting this genetic variant from both parents accelerates the time to needing a walking aid by almost four years,\u201d said Sergio Baranzini, Professor of Neurology at University of California San Francisco (UCSF) and co-senior author of the study.<\/p>\n \u201cUnderstanding how the variant exerts its effects on MS severity will hopefully pave the way to a new generation of treatments that are able to prevent disease progression,\u201d said Stephen Sawcer, a professor at the University of Cambridge and the other co-senior author of the study.<\/p>\n The work was the result of a large international collaboration of more than 70 institutions from around the world, collectively known as the International Multiple Sclerosis Genetics Consortium (IMSGC). The Westmead Institute for Medical Research (WIMR), led by Dr Grant Parnell and Professor Graeme Stewart AM, is proud to have made a significant contribution to this project.<\/p>\n To address the mystery of MS severity, two large MS research consortia joined forces: The International Multiple Sclerosis Genetics Consortium (IMSGC) and The MultipleMS Consortium. This enabled MS researchers from around the world to pool the resources needed to begin to identify the genetic factors influencing MS outcomes.<\/p>\n Dr Parnell says, \u201cA study of this magnitude is only possible by combining forces with many groups internationally. This current study has been driven by the 20 nation International MS Genetics Consortium (IMSGC), within which WIMR MS research leaders have played senior roles from its inception.\u201d<\/p>\n A renewed focus on the nervous system<\/strong> The two consortia combined data from more than 12,000 people with MS to complete a genome-wide association study, which uses statistics to carefully link genetic variants to particular traits. \u00a0In this case, the traits of interest were related to MS severity, including the years it took for each individual to advance from diagnosis to a certain level of disability.<\/p>\n After sifting through more than seven million genetic variants, the scientists found one that was associated with faster disease progression. \u00a0The variant sits between two genes called DYSF and ZNF638.\u00a0 Neither of these genes have any prior known connection to MS.<\/p>\n DYSF is involved in repairing damaged cells, while ZNF638 helps to control viral infections.\u00a0 The variant\u2019s proximity to these genes suggests that they may be involved in disease progression.<\/p>\n \u201cThese genes are normally active within the brain and spinal cord, rather than the immune system,\u201d said Adil Harroud, MD, lead author of the study and former postdoctoral researcher in the Baranzini Lab.<\/p>\n \u201cOur findings suggest that resilience and repair in the nervous system determine the course of MS progression and that we should focus on these parts of human biology for better therapies.\u201d<\/p>\n The findings give the field its first leads to address the nervous system component of MS. An ever-expanding coalition to address MS severity<\/strong> Further work will be necessary to determine exactly how this genetic variant affects DYSF, ZNF638, and the nervous system more generally. \u00a0The researchers are also collecting an even larger set of DNA samples from people with MS, expecting to find other variants that contribute to long-term disability in MS.<\/p>\n \u201cThis gives us a new opportunity to develop new drugs that may help preserve the health of all who suffer from MS,\u201d said Harroud.<\/p>\n Funding:<\/strong>\u00a0This work was supported in part by funding from the NIH\/NINDS (R01NS099240), the European Union\u2019s Horizon 2020 Research and Innovation Funding Program, and the Multiple Sclerosis Society of Canada.<\/p>\n","protected":false},"excerpt":{"rendered":" The first genetic marker for MS severity has been identified, opening the door to treatments for long-term disability. For the first time, a study of more than 22,000 people with multiple sclerosis has discovered a genetic variant associated with faster disease progression, which can rob patients of their mobility and independence over time. Multiple sclerosis […]<\/p>\n","protected":false},"featured_media":3242,"parent":0,"menu_order":0,"template":"","meta":{"_acf_changed":false,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"default","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}}},"categories":[19],"class_list":["post-3241","news","type-news","status-publish","has-post-thumbnail","hentry","category-cat-news"],"acf":[],"_links":{"self":[{"href":"https:\/\/wimr.org.au\/wp-json\/wp\/v2\/news\/3241","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wimr.org.au\/wp-json\/wp\/v2\/news"}],"about":[{"href":"https:\/\/wimr.org.au\/wp-json\/wp\/v2\/types\/news"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/wimr.org.au\/wp-json\/wp\/v2\/media\/3242"}],"wp:attachment":[{"href":"https:\/\/wimr.org.au\/wp-json\/wp\/v2\/media?parent=3241"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wimr.org.au\/wp-json\/wp\/v2\/categories?post=3241"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
\nPrevious studies have shown that MS susceptibility, or risk, stems in large part from dysfunction in the immune system, and some of this dysfunction can be treated, slowing down the disease. However, these risk factors don\u2019t explain why, ten years after diagnosis, some MS patients are in wheelchairs while others continue to run marathons.<\/p>\n
\nAlthough it seems obvious that your brain\u2019s resilience to injury would determine the severity of a disease like MS, this new study points toward the key processes that underlie this resilience.<\/p>\n
\nTo confirm their findings, the scientists investigated the genetics of nearly 10,000 additional MS patients.\u00a0 Those with two copies of the variant became disabled faster.<\/p>\n