{"id":3146,"date":"2017-02-15T20:03:50","date_gmt":"2017-02-16T01:03:50","guid":{"rendered":"https:\/\/www.med.unc.edu\/neuroscience\/researchers-use-mris-to-predict-which-high-risk-babies-will-develop-autism-as-toddlers\/"},"modified":"2018-07-05T13:51:23","modified_gmt":"2018-07-05T17:51:23","slug":"researchers-use-mris-to-predict-which-high-risk-babies-will-develop-autism-as-toddlers","status":"publish","type":"post","link":"https:\/\/www.med.unc.edu\/neuroscience\/researchers-use-mris-to-predict-which-high-risk-babies-will-develop-autism-as-toddlers\/","title":{"rendered":"Researchers use MRIs to Predict Which High-Risk Babies will Develop Autism as Toddlers"},"content":{"rendered":"
\n

<\/p>\n

This first-of-its-kind study used MRIs to image the brains of infants, and then researchers used brain measurements and a computer algorithm to accurately predict autism before symptoms set in.<\/p>\n

\n
\"image2\"
Joseph Piven, MD<\/figcaption><\/figure>\n
\"image3\"
Heather Hazlett, PhD<\/figcaption><\/figure>\n<\/div>\n
\n

Using magnetic resonance imaging (MRI) in infants with older siblings with autism, researchers from around the country were able to correctly predict 80 percent of those infants who would later meet criteria for autism at two years of age.<\/p>\n

The study, published today in Nature, <\/i>is the first to show it is possible to identify which infants \u2013 among those with older siblings with autism \u2013 will be diagnosed with autism at 24 months of age.<\/p>\n

\u201cOur study shows that early brain development biomarkers could be very useful in identifying babies at the highest risk for autism before behavioral symptoms emerge,\u201d said senior author Joseph Piven, MD, the Thomas E. Castelloe Distinguished Professor of Psychiatry at the University of North Carolina-Chapel Hill. \u201cTypically, the earliest an autism diagnosis can be made is between ages two and three. But for babies with older autistic siblings, our imaging approach may help predict during the first year of life which babies are most likely to receive an autism diagnosis at 24 months.\u201d<\/p>\n

This research project included hundreds of children from across the country and was led by researchers at the Carolina Institute for Developmental Disabilities (CIDD) at the University of North Carolina, where Piven is director. The project\u2019s other clinical sites included the University of Washington, Washington University in St. Louis, and The Children\u2019s Hospital of Philadelphia. Other key collaborators are McGill University, the University of Alberta, the University of Minnesota, the College of Charleston, and New York University.<\/p>\n

\u201cThis study could not have been completed without a major commitment from these families, many of whom flew in to be part of this,\u201d said first author Heather Hazlett, PhD, assistant professor of psychiatry at the UNC School of Medicine and a CIDD researcher. \u201cWe are still enrolling families for this study, and we hope to begin work on a similar project to replicate our findings.\u201d<\/p>\n

People with Autism Spectrum Disorder (or ASD) have characteristic social deficits and demonstrate a range of ritualistic, repetitive and stereotyped behaviors. It is estimated that one out of 68 children develop autism in the United States. For infants with older siblings with autism, the risk may be as high as 20 out of every 100 births. There are about 3 million people with autism in the United States and tens of millions around the world.<\/p>\n

Despite much research, it has been impossible to identify those at ultra-high risk for autism prior to 24 months of age, which is the earliest time when the hallmark behavioral characteristics of ASD can be observed and a diagnosis made in most children.<\/p>\n

For this Nature<\/i> study, Piven, Hazlett, and researchers from around the country conducted MRI scans of infants at six, 12, and 24 months of age. They found that the babies who developed autism experienced a hyper-expansion of brain surface area from six to 12 months, as compared to babies who had an older sibling with autism but did not themselves show evidence of the condition at 24 months of age. Increased growth rate of surface area in the first year of life was linked to increased growth rate of overall brain volume in the second year of life. Brain overgrowth was tied to the emergence of autistic social deficits in the second year.<\/p>\n

Previous behavioral studies of infants who later developed autism \u2013 who had older siblings with autism \u2013revealed that social behaviors typical of autism emerge during the second year of life.<\/p>\n

The researchers then took these data \u2013 MRIs of brain volume, surface area, cortical thickness at 6 and 12 months of age, and sex of the infants \u2013 and used a computer program to identify a way to classify babies most likely to meet criteria for autism at 24 months of age. The computer program developed the best algorithm to accomplish this, and the researchers applied the algorithm to a separate set of study participants.<\/p>\n

The researchers found that brain differences at 6 and 12 months of age in infants with older siblings with autism correctly predicted eight out of ten infants who would later meet criteria for autism at 24 months of age in comparison to those infants with older ASD siblings who did not meet criteria for autism at 24 months.<\/p>\n

\u201cThis means we potentially can identify infants who will later develop autism, before the symptoms of autism begin to consolidate into a diagnosis,\u201d Piven said.<\/p>\n

If parents have a child with autism and then have a second child, such a test might be clinically useful in identifying infants at highest risk for developing this condition. The idea would be to then intervene \u2018pre-symptomatically\u2019 before the emergence of the defining symptoms of autism.<\/p>\n

Research could then begin to examine the effect of interventions on children during a period before the syndrome is present and when the brain is most malleable. Such interventions may have a greater chance of improving outcomes than treatments started after diagnosis.<\/p>\n

\u201cPutting this into the larger context of neuroscience research and treatment, there is currently a big push within the field of neurodegenerative diseases to be able to detect the biomarkers of these conditions before patients are diagnosed, at a time when preventive efforts are possible,\u201d Piven said. \u201cIn Parkinson\u2019s for instance, we know that once a person is diagnosed, they\u2019ve already lost a substantial portion of the dopamine receptors in their brain, making treatment less effective.\u201d<\/p>\n

Piven said the idea with autism is similar; once autism is diagnosed at age 2-3 years, the brain has already begun to change substantially.<\/p>\n

\u201cWe haven\u2019t had a way to detect the biomarkers of autism before the condition sets in and symptoms develop,\u201d he said. \u201cNow we have very promising leads that suggest this may in fact be possible.\u201d<\/p>\n

For this research, NIH funding was provided by the Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD), the National Institute of Mental Health (NIMH), and the National Institute of Biomedical Imaging and Bioengineering. Autism Speaks and the Simons Foundation contributed additional support.<\/i><\/p>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

<\/p>\n

This first-of-its-kind study used MRIs to image the brains of infants, and then researchers used brain measurements and a computer algorithm to accurately predict autism before symptoms set in.<\/p>\n","protected":false},"author":70069,"featured_media":3147,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":"","_links_to":"","_links_to_target":""},"categories":[2],"tags":[4,23,42,41,7],"class_list":["post-3146","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news","tag-4","tag-autism-spectrum-disorder","tag-cidd","tag-nature","tag-publication","odd"],"acf":[],"yoast_head":"\nResearchers use MRIs to Predict Which High-Risk Babies will Develop Autism as Toddlers | UNC Neuroscience Center<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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