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<h2 class="element-invisible">You are here</h2><div class="breadcrumb"><a href="/">Home</a> » <a href="/news-events">News & Events</a> » <a href="/news-events/nih-research-matters">NIH Research Matters</a></div> <div class="l-region l-region--section-header">
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<div about="/news-events/nih-research-matters/exercise-induced-protein-may-reverse-age-related-cognitive-decline" typeof="sioc:Item foaf:Document" class="ds-1col node node--nih-research-matters view-mode-full node--full node--nih-research-matters--full clearfix">
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<p class="publishdate"><span property="dc:date" datatype="xsd:dateTime" content="2020-07-21T00:00:00-04:00" class="date-display-single">July 21, 2020</span></p><div class='syndicate'><h1>Exercise-induced protein may reverse age-related cognitive decline</h1><div class="callout callout-with-border"><h3>At a Glance</h3>
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<ul>
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<li>An exercise-induced protein restored age-related loss of memory and new brain cell growth in mice. </li>
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<li>Active older adults had more of the protein circulating in their body than sedentary adults.</li>
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<li>The results suggest that exercise may have a rejuvenating effect in addition to a preventative effect on aging.</li>
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</ul></div><div class="media-float-right"><div class="ds-1col file file-image file-image-jpeg view-mode-floated_media clearfix">
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<picture title="Group of senior adults on a walk through the park on a sunny day.">
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<!--[if IE 9]><video style="display: none;"><![endif]-->
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<source srcset="https://www.nih.gov/sites/default/files/styles/floated_media_breakpoint-large/public/news-events/research-matters/2020/20200721-exercise.jpg?itok=OPyFtyEi&timestamp=1595339960 1x" media="screen and (min-width: 960px)" />
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<source srcset="https://www.nih.gov/sites/default/files/styles/floated_media_breakpoint-medium/public/news-events/research-matters/2020/20200721-exercise.jpg?itok=XiNf3-12&timestamp=1595339960 1x" media="screen and (min-width: 800px)" />
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<source srcset="https://www.nih.gov/sites/default/files/styles/floated_media_breakpoint-medium-small/public/news-events/research-matters/2020/20200721-exercise.jpg?itok=HF7nBDHE&timestamp=1595339960 1x" media="screen and (min-width: 600px)" />
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<source srcset="https://www.nih.gov/sites/default/files/styles/floated_media_breakpoint-small/public/news-events/research-matters/2020/20200721-exercise.jpg?itok=eWjO6n07&timestamp=1595339960 1x" media="screen and (min-width: 480px)" />
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<source srcset="https://www.nih.gov/sites/default/files/styles/floated_media_breakpoint-tiny/public/news-events/research-matters/2020/20200721-exercise.jpg?itok=4MoqFAlf&timestamp=1595339960 1x" media="screen and (min-width: 0)" />
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<!--[if IE 9]></video><![endif]-->
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<img src="https://www.nih.gov/sites/default/files/styles/floated_media_breakpoint-medium/public/news-events/research-matters/2020/20200721-exercise.jpg?itok=XiNf3-12&timestamp=1595339960" alt="Group of senior adults on a walk through the park on a sunny day." title="Group of senior adults on a walk through the park on a sunny day." />
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</picture><span class="caption">New findings suggest how physical activity may slow age-related cognitive decline. </span><span class="credit">FatCamera / E+ via Getty Images</span></div>
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</div><p>Exercise and physical activity are important as you age. They help keep your body and brain healthy. Staying active can help you remain independent by preventing loss of physical mobility. It may also slow age-related cognitive decline.</p>
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||
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<p>Researchers don’t know how exercise might slow age-related cognitive decline. A better understanding of this process could point toward ways to help those who have difficulty exercising due to fragility or health conditions.</p>
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||
<p>In animals, exercise has been shown to reverse age-related decline in a brain area called the hippocampus. This region is important for learning, memory, and other cognitive functions. To determine what may underlie these potential rejuvenating effects of exercise on the brain, a research team led by Dr. Saul A. Villeda at the University of California, San Francisco compared proteins that circulate in the blood of mice who get a lot of physical activity with those in sedentary mice. The work was funded by NIH’s National Institute on Aging (NIA). Results were published on June 10, 2020 in<em> Science.</em></p>
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||
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||
<p>Researchers compared the brains of young (3 months) and aged (18 months) mice that either had access to a running wheel in their cage for six weeks or were sedentary. They looked at age-related molecular and cellular changes in the hippocampus. Older mice that were active showed increased generation of new brain cells called neurons and higher levels of nerve cell growth factors than sedentary mice. They also made less errors in hippocampal-dependent learning and memory tasks.</p>
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||
<p>The team then collected blood and plasma from both young (6 to 7 months) and aged mice (18 months) who were either active or sedentary. They injected their plasma into separate groups of older mice eight times over three weeks. The aged mice that received blood from the active groups showed increases in new neurons and on learning and memory tasks similar to those of the active mice themselves.</p>
|
||
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||
<p>Many proteins were found at higher levels in the blood of the active mice. The researchers honed in on one made in the liver, called GPLD1. Researchers injected the gene for the protein into aged mice, causing their livers to produce GPLD1. After three weeks, the animals showed brain cell growth and improvements in learning and memory similar to that seen in active mice.</p>
|
||
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||
<p>GPLD1 did not appear to enter the brain, suggesting that the protein acts through one or more molecules that interact with the brain directly. Further study will be needed to understand its mechanism of action.</p>
|
||
|
||
<p>The researchers also collected blood samples from healthy older people (ages 66 to 78) to explore whether the protein could play a similar role in humans. Levels of GPLD1 were higher in those who were physically active (>7100 steps per day) than in those who were sedentary (<7100 steps per day).</p>
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||
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||
<p>“Through this protein, the liver is responding to physical activity and telling the old brain to get young,” Villeda says. “This is a remarkable example of liver-to-brain communication that, to the best of our knowledge, no one knew existed.”</p>
|
||
|
||
<p>More research is needed to determine how much, how long, and what types of exercise people would need to see cognitive benefits. Further, identifying the factors underlying this protein’s effects on the brain could help researchers develop therapeutics to combat age-related cognitive decline.</p>
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<p>—by Tianna Hicklin, Ph.D.</p></div><h2 class="label-above">Related Links</h2><ul class="spaced print-urls"><li><a href="https://www.nih.gov/news-events/nih-research-matters/number-steps-day-more-important-step-intensity" target="_top">Number of Steps Per Day More Important Than Step Intensity</a></li><li><a href="https://www.nih.gov/news-events/nih-research-matters/blood-protein-signatures-change-across-lifespan" target="_top">Blood Protein Signatures Change Across Lifespan</a></li><li><a href="https://www.nih.gov/news-events/nih-research-matters/how-many-steps-better-health" target="_top">How Many Steps for Better Health?</a></li><li><a href="https://www.nih.gov/news-events/nih-research-matters/getting-active-later-life-brings-benefits" target="_top">Getting Active Later in Life Brings Benefits</a></li><li><a href="https://www.nih.gov/news-events/nih-research-matters/physical-activity-may-reduce-age-related-movement-problems" target="_top">Physical Activity May Reduce Age-Related Movement Problems</a></li><li><a href="https://www.nih.gov/news-events/nih-research-matters/moderate-exercise-may-improve-memory-older-adults" target="_top">Moderate Exercise May Improve Memory in Older Adults</a></li><li><a href="https://directorsblog.nih.gov/2017/04/25/aging-research-plasma-protein-revitalizes-the-brain/" target="_top">Aging Research: Plasma Protein Revitalizes the Brain</a></li><li><a href="https://newsinhealth.nih.gov/2020/07/personalized-exercise" target="_top">Personalized Exercise? How Biology Influences Fitness</a></li><li><a href="http://www.nia.nih.gov/health/exercise-physical-activity" target="_top">Exercise and Physical Activity </a></li></ul><p class="footnote"><strong class="label-inline">References: </strong><a href="https://pubmed.ncbi.nlm.nih.gov/32646997/">Blood factors transfer beneficial effects of exercise on neurogenesis and cognition to the aged brain</a>. Horowitz AM, Fan X, Bieri G, Smith LK, Sanchez-Diaz CI, Schroer AB, Gontier G, Casaletto KB, Kramer JH, Williams KE, Villeda SA. <em>Science</em>. 2020 Jul 10;369(6500):167-173. doi: 10.1126/science.aaw2622. PMID: 32646997.</p><p class="footnote"><strong class="label-inline">Funding: </strong>NIH’s National Institute on Aging (NIA); Hillblom Foundation; American Federation for Aging Research; Irene Diamond Fund; M. and L. Benioff.</p>
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