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An estimated 1 in 68 children in the United States has autism. The neurodevelopmental disorder, which impairs communication and social interaction skills, can be treated with medications and behavioral therapies, though there is no cure. Now, University of Missouri researchers have found that a medication commonly used to treat high blood pressure and irregular heartbeats may have the potential to improve some social functions of individuals with autism.
“Propranolol was first reported to improve the language and sociability skills of individuals with autism in 1987, but it was not a randomized, controlled trial, and there has been little follow-up research on this drug in relation to autism,” said David Beversdorf, M.D., associate professor in the departments of radiology, neurology and psychological sciences at MU and the MU Thompson Center for Autism and Neurodevelopmental Disorders, and senior author of the study. “While its intended use is to treat high blood pressure, propranolol has been used off-label to treat performance anxiety for several years. However, this is the first study to show that a single dose of propranolol can improve the conversational reciprocity skills of individuals with autism.”
Led by Rachel Zamzow, graduate student with the MU Center for Translational Neuroscience, 20 individuals with autism were recruited from the MU Thompson Center and given either a 40-milligram dose of propranolol or a placebo pill. An hour after administration, the researchers had a structured conversation with the participants, scoring their performance on six social skills necessary to maintain a conversation: staying on topic, sharing information, reciprocity or shared conversation, transitions or interruptions, nonverbal communication and maintaining eye contact. The researchers found the total communication scores were significantly greater when the individual took propranolol compared to the placebo.
“Though more research is needed to study its effects after more than one dose, these preliminary results show a potential benefit of propranolol to improve the conversational and nonverbal skills of individuals with autism,” said Beversdorf, who also serves as the William and Nancy Thompson Endowed Chair in Radiology at MU. “Next, we hope to study the drug in a large clinical trial to establish the effects of regular doses and determine who would most likely benefit from this medication. Additional studies could lead the way for improved treatments for individuals with autism.”
[divider]About this Autism research[/divider]
In addition to Beversdorf and Zamzow, the research team included Bradley Ferguson, graduate student with the MU Center for Translational Neuroscience; Janine Stichter, Ph.D., with the MU Department of Special Education; Eric Porges, Ph.D., with the Department of Aging and Geriatric Research at the University of Florida; Alexandra Ragsdale with the MU Department of Biological Sciences; and Morgan Lewis with the MU departments of biological sciences and psychological sciences.
Funding: Research reported in this publication was supported by the Health Resources and Services Administration under award number 1R40MC19926. The content is solely the responsibility of the authors and does not necessarily represent the official views of the funding agency.
Source: Derek Thompson – University of Missouri-Columbia Image Credit: The image is in the public domain Original Research: Abstract for “Effects of Propranolol on Conversational Reciprocity in Autism Spectrum Disorder: A Pilot, Double-blind, Single-dose Psychopharmacological Challenge Study” by Rachel M. Zamzow, Bradley J. Ferguson, Janine P. Stichter, Eric C. Porges, Alexandra S. Ragsdale, Morgan L. Lewis, and David Q. Beversdorf in Psychopharmacology. Published online January 14 2016 doi:10.1007/s00213-015-4199-0
Effects of Propranolol on Conversational Reciprocity in Autism Spectrum Disorder: A Pilot, Double-blind, Single-dose Psychopharmacological Challenge Study
Objectives The present pilot study explores the acute effects of propranolol on a measure of conversational reciprocity in this population. We also examined whether autonomic activity and anxiety moderate or mediate response to the drug, given relationships between these variables and ASD, as well as the drug’s effects.
Methods In a within-subject crossover design, 20 individuals with ASD received a single dose of propranolol or placebo during two sessions in a double-blinded, counterbalanced manner. After drug administration, participants performed a conversational reciprocity task by engaging in a short conversation with the researcher. Measurements of autonomic activity and anxiety were obtained before and after drug administration.
Results Propranolol significantly improved performance on the conversational reciprocity task total [d = 0.40] and nonverbal communication domain scores when compared to the placebo condition. However, neither autonomic activity nor anxiety was significantly associated with drug response.
Conclusions Acute propranolol administration improved conversational reciprocity in ASD. Further exploration of these preliminary findings, as well as other potential treatment response predictors, with serial doses is warranted.
“Effects of Propranolol on Conversational Reciprocity in Autism Spectrum Disorder: A Pilot, Double-blind, Single-dose Psychopharmacological Challenge Study” by Rachel M. Zamzow, Bradley J. Ferguson, Janine P. Stichter, Eric C. Porges, Alexandra S. Ragsdale, Morgan L. Lewis, and David Q. Beversdorf in Psychopharmacology. Published online January 14 2016 doi:10.1007/s00213-015-4199-0
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