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Could Alzheimer’s be an autoimmune disease?

<p>Searching for an Alzheimer’s cure is among the world’s most pressing needs. Researchers in Canada have a new theory.</p> <p>Alzheimer’s is a degenerative brain disease with no cure and no effective therapeutic treatments to  stop or slow its progression. It impacts an estimated <a href="https://cosmosmagazine.com/health/dementias-rising-pressure/" target="_blank" rel="noreferrer noopener">50 million people around the world</a>, and for those afflicted, invariably results in <a href="https://www.dementia.org.au/" target="_blank" rel="noreferrer noopener">dementia</a> and death.</p> <p><a href="https://www.healthdirect.gov.au/alzheimers-disease" target="_blank" rel="noreferrer noopener">In Australia Alzheimer’s affects up to 1 in 10 Australians over 65 years of age, and up to 3 in 10 over 85. It is not a normal part of ageing.</a></p> <p>One prevailing theory suggests that a sticky protein called beta-amyloid builds up in the brain forming clumps known as plaques, which then acts to kill brain cells, directly causing Alzheimer’s disease. However, 30 years of research into the development of medical treatments designed to target these plaques have led to failure after failure.</p> <p>Now, scientists at the Krembil Brain Institute, which is part of the University Health Network in Ontario, Canada suggest that new thinking around the disease is desperately needed.</p> <p>They are asking: “Could Alzheimer’s be an <a href="https://cosmosmagazine.com/health/medicine/autoimmune-disease-on-the-rise/" target="_blank" rel="noreferrer noopener">autoimmune disease</a>?”</p> <div class="newsletter-box"> <div id="wpcf7-f6-p215071-o1" class="wpcf7" dir="ltr" lang="en-US" role="form"> <form class="wpcf7-form mailchimp-ext-0.5.62 spai-bg-prepared init" action="/news/could-alzheimers-be-an-autoimmune-disease/#wpcf7-f6-p215071-o1" method="post" novalidate="novalidate" data-status="init"> <p style="display: none !important;"><span class="wpcf7-form-control-wrap referer-page"><input class="wpcf7-form-control wpcf7-text referer-page" name="referer-page" type="hidden" value="https://cosmosmagazine.com/health/" data-value="https://cosmosmagazine.com/health/" aria-invalid="false" /></span></p> <p><!-- Chimpmail extension by Renzo Johnson --></form> </div> </div> <p>“Yes,” says Dr. Donald Weaver, co-Director of the Krembil Brain Institute and author of <a href="https://alz-journals.onlinelibrary.wiley.com/doi/full/10.1002/alz.12789" target="_blank" rel="noreferrer noopener">new research</a> published in the peer-reviewed journal, <em>Alzheimer’s &amp; Dementia</em>. “We don’t think of Alzheimer’s as fundamentally a disease of the brain. We think of it as a disease of the immune system <em>within</em> the brain.”</p> <p>The role of beta-amyloid in the brain is as an ‘immunopeptide’ – a messenger within the immune system which is involved in repairing the brain. “If we have head trauma, beta-amyloid repairs it. If a virus or a bacteria comes along, beta-amyloid is there to fight it,” explains Weaver.</p> <p>But unfortunately, beta-amyloid can become confused.</p> <p>“Beta-amyloid gets confused and can’t tell the difference between a bacteria and a brain cell,” says Weaver. “And so, it inadvertently attacks our own brain cells. This, then, becomes what we call an autoimmune disease.”</p> <p>To test these ideas, the team surveyed the disease and patient literature to develop a detailed model describing the cause and effect relationship of Alzheimer’s disease (known as a <a href="https://royalsocietypublishing.org/doi/10.1098/rsbl.2017.0660" target="_blank" rel="noreferrer noopener">mechanistic model</a>).</p> <p>This approach allowed them to step back and take a more holistic review of the workings of the disease at several different levels within the biological system — such as Alzheimer’s progression and effect on different sections of the brain’s nerve cells, and the larger immune disease response — and also to consider novel causes and inputs into the disease.</p> <p>Tangible rethinking about Alzheimer’s disease as an autoimmune disease, and beta-amyloid as a normal part of our immune system, opens the door to new avenues and approaches to develop innovative new therapies, says Dr. Weaver, who hopes that this new conceptual framework could eventually present a new way to combat this insidious and devastating disease.</p> <p><!-- Start of tracking content syndication. Please do not remove this section as it allows us to keep track of republished articles --></p> <p><img id="cosmos-post-tracker" style="opacity: 0; height: 1px!important; width: 1px!important; border: 0!important; position: absolute!important; z-index: -1!important;" src="https://syndication.cosmosmagazine.com/?id=215071&amp;title=Could+Alzheimer%E2%80%99s+be+an+autoimmune+disease%3F" width="1" height="1" /></p> <p><!-- End of tracking content syndication --></p> <div id="contributors"> <p><em><a href="https://cosmosmagazine.com/news/could-alzheimers-be-an-autoimmune-disease/" target="_blank" rel="noopener">This article</a> was originally published on <a href="https://cosmosmagazine.com" target="_blank" rel="noopener">Cosmos Magazine</a> and was written by <a href="https://cosmosmagazine.com/contributor/clare-kenyon" target="_blank" rel="noopener">Clare Kenyon</a>. Clare Kenyon is a science journalist for Cosmos. An ex-high school teacher, she is currently wrangling the death throes of her PhD in astrophysics, has a Masters in astronomy and another in education. Clare also has diplomas in music and criminology and a graduate certificate of leadership and learning.</em></p> <p><em>Image: Getty Images</em></p> </div>

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The radical idea offering hope for millions of Aussies suffering from autoimmune disease

<p><strong>Professor Chris Goodnow, Deputy Director of the Garvan Institute of Medical Research, talks about the radical idea that’s offering hope for millions of Australians currently suffering from autoimmune disease.</strong></p> <p>Autoimmune diseases are on the rise in Australia, and fast becoming a problem for our already-stretched healthcare system. One in 8 people will be affected by an autoimmune disease like arthritis, multiple sclerosis, Type 1 diabetes and coeliac disease at some point in their life. These conditions can have a devastating effect, not just on patients, but on their family members and friends as well.</p> <p>While much about autoimmune disease remains a mystery, early findings from research at the Garvan Institute offers hope, with many believing it it may lead to a cure.</p> <p><strong>What we know about autoimmune disease</strong></p> <p>Most of our understanding of autoimmune disease is restricted to what’s going on in the body. We know autoimmune disease occurs when the body attacks and damages its own tissue, we know the symptoms, we have methods to manage these diseases as best we can, and we know what to expect when someone’s diagnosed. What’s less clear, and what the Garvan Institute’s Hope Research project is trying to answer, is why the immune system is doing this, and whether this is curable.</p> <p><img width="499" height="555" src="https://oversixtydev.blob.core.windows.net/media/7268400/artwork-2_499x555.jpg" alt="Artwork 2" style="display: block; margin-left: auto; margin-right: auto;"/></p> <p><strong>How close are we to understanding causes?</strong></p> <p>The encouraging news is we’re closer to an understanding than we’ve ever been, which could one day lead to a cure. The Garvan Institute has been leading the way in autoimmune disease research, thanks largely to work spearheaded by a radical hypothesis from the organisation’s Deputy Director, Professor Chris Goodnow.</p> <p>Over a decade ago, Professor Goodnow theorised that there was a common cause for all autoimmune diseases – disruptions in the immune system’s clever “checkpoint” process causing “rogue clone” cells to spread and replicate.</p> <p>The technology to put this theory to the test didn’t exist previously. But recent advances have given Professor Goodnow and his team the ability to isolate individual disease-causing cells from the blood of patients and target the “rogue clones”. And this has far-reaching implications of the management and treatment of these diseases.</p> <p>“For the last 10 years, we’ve had a pretty good idea as to what might cause autoimmune disease, and we’ve figured out many of the mechanisms that normally stop it. But we haven’t had the tools and the technology to be able to test those ideas,” Professor Goodnow explains.</p> <p>“In the last three years, we’ve acquired the tools and technology here at the Garvan Institute. We are now bringing them together with a fantastic team of medical experts at the major hospitals around Sydney to really focus those tools and know-how on cracking this problem.”</p> <p><strong>Why it’s important to understand the causes of autoimmune disease</strong></p> <p>While many autoimmune diseases can be managed, there’s yet no cure. But the revolutionary research from Professor Goodnow and the team at the Garvan Institute suggests this is about to change. If researchers can pin down the “rogue cells” and what prompted them to go rogue, they could theoretically use existing immunotherapies and drugs to eradicate them from the body, targeting the disease at the source.</p> <p>The Garvan Institute has already made exciting strides through the work of Dr Joanne Reed, who put Professor Goodnow’s theory to the test in a pilot study for Sjögren’s syndrome. The results she recorded were nothing short of spectacular.</p> <p>“Excitingly, our pilot study has already identified disease causing rogue clones in Sjögren’s syndrome,” Dr Reed says.</p> <p>“We’ll now apply this discovery to 36 clinically diverse autoimmune diseases.”</p> <p><img width="500" height="334" src="https://oversixtydev.blob.core.windows.net/media/7268452/rsz_joanne_reed_with_etienne_masle-farquhar2_500x334.jpg" alt="Rsz _joanne _reed _with _etienne _masle -farquhar2" style="display: block; margin-left: auto; margin-right: auto;"/></p> <p><strong>The challenges of this revolutionary research?</strong></p> <p>As is often the case, progress in the world of science doesn’t come cheap. The costs associated with the Hope Research project’s revolutionary work are substantial.</p> <p>“To identify the rogue cells in one person costs thousands of dollars; to identify the mutations in those rogue cells costs $5,000-$20,000. It will get cheaper the more we do it, and the more the technology continues to mature,” Professor Goodnow says.</p> <p>“You could say we should just wait 10 years, until the technology has gotten cheaper, but we can’t wait. We want to know the root cause of autoimmune disease <em>now</em>. We’ve got the technology. We know what we need to do. We just need the resources to do it.”</p> <p><strong>How you can help</strong></p> <p>Contributing funds to the Garvan Institute is a good way to start, and you’ll be surprised how far your dollar goes to tackling autoimmune disease.</p> <p>As Professor Goodnow says, “For every dollar you give, we will leverage that many, many times over, in terms of being able to reach a cure for these diseases.”</p> <p><a href="https://www.garvan.org.au/foundation/give-hope/?utm_source=fairfax&amp;utm_medium=sponsoredcontent&amp;utm_campaign=give_hope" target="_blank"><span style="text-decoration: underline;"><strong>You can contribute</strong></span></a> to Garvan’s fight against autoimmune disease. Visit <span style="text-decoration: underline;"><strong><a href="https://www.garvan.org.au/foundation/give-hope/?utm_source=fairfax&amp;utm_medium=sponsoredcontent&amp;utm_campaign=give_hope" target="_blank">garvan.org.au/give-hope</a></strong></span><a href="#_msocom_1"></a></p> <div>THIS IS SPONSORED CONTENT BROUGHT TO YOU IN CONJUNCTION WITH THE GARVAN INSTITUTE.</div>

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