Featured Research

from universities, journals, and other organizations

Drug treatment corrects autism symptoms in mouse model

Date:
March 13, 2013
Source:
University of California, San Diego Health Sciences
Summary:
Autism results from abnormal cell communication. Testing a new theory, researchers have used a newly discovered function of an old drug to restore cell communications in a mouse model of autism, reversing symptoms of the devastating disorder.

Autism results from abnormal cell communication. Testing a new theory, researchers have used a newly discovered function of an old drug to restore cell communications in a mouse model of autism, reversing symptoms of the devastating disorder.
Credit: Tramper2 / Fotolia

Autism results from abnormal cell communication. Testing a new theory, researchers at the University of California, San Diego School of Medicine have used a newly discovered function of an old drug to restore cell communications in a mouse model of autism, reversing symptoms of the devastating disorder.

The findings are published in the March 13, 2013 issue of the journal PLOS ONE.

"Our (cell danger) theory suggests that autism happens because cells get stuck in a defensive metabolic mode and fail to talk to each other normally, which can interfere with brain development and function," said Robert Naviaux, MD, PhD, professor of medicine and co-director of the Mitochondrial and Metabolic Disease Center at UC San Diego. "We used a class of drugs that has been around for almost a century to treat other diseases to block the 'danger' signal in a mouse model, allowing cells to return to normal metabolism and restore cell communication."

"Of course, correcting abnormalities in a mouse is a long way from a cure for humans," said Naviaux, "but we are encouraged enough to test this approach in a small clinical trial of children with autism spectrum disorder in the coming year. This trial is still in the early stages of development. We think this approach -- called antipurinergic therapy or APT -- offers a fresh and exciting new path that could lead to development of a new class of drugs to treat autism."

Autism spectrum disorders (ASDs) are complex disorders defined by abnormalities in the development of language, social and repetitive behaviors. Hundreds of different genetic and environment factors are known to confer risk. In this study, nearly a dozen UC San Diego scientists from different disciplines collaborated to find a unifying mechanism that explains autism. Their work is the result of one of just three international "Trailblazer" awards given by the group Autism Speaks in 2011.

Describing a completely new theory for the origin and treatment of autism using APT, Naviaux and colleagues introduce the concept that a large majority of both genetic and environmental causes for autism act by producing a sustained cell danger response -- the metabolic state underlying innate immunity and inflammation.

"When cells are exposed to classical forms of dangers, such as a virus, infection or toxic environmental substance, a defense mechanism is activated," Naviaux explained. "This results in changes to metabolism and gene expression, and reduces the communication between neighboring cells. Simply put, when cells stop talking to each other, children stop talking."

Since mitochondria -- the so-called "power plants" of the cell -- play a central role in both infectious and non-infectious cellular stress, innate immunity and inflammation, Naviaux and colleagues searched for a signaling system in the body that was both linked to mitochondria and critical for innate immunity. They found it in extracellular nucleotides like adenosine triphosphate (ATP) and other mitokines -- signaling molecules made by distressed mitochondria. These mitokines have separate metabolic functions outside of the cell where they bind to and regulate receptors present on every cell of the body. Fifteen types of purinergic receptors are known to be stimulated by these extracellular nucleotides, and the receptors are known to control a broad range of biological characteristics with relevance to autism.

The researchers tested suramin -- a well-known inhibitor of purinergic signaling used medically for the treatment of African sleeping sickness since shortly after it was synthesized in 1916 -- in mice. They found that this APT mediator corrected autism-like symptoms in the animal model, even if the treatment was started well after the onset of symptoms. The drug restored 17 types of multi-symptom abnormalities including normalizing brain synapse structure, cell-to-cell signaling, social behavior, motor coordination and normalizing mitochondrial metabolism.

"The striking effectiveness shown in this study using APT to 'reprogram' the cell danger response and reduce inflammation showcases an opportunity to develop a completely new class of anti-inflammatory drugs to treat autism and several other disorders," Naviaux said.

Additional contributors to the study include Zarazuela Zolkipli, Lin Wang, Tomohiro Nakayama, Jane C. Naviaux, Thuy P. Le, Michael Schuchbauer, Mihael Rogac, Qingbo Tang, Laura L. Dugan, and Susan B. Powell.

Funding for the project was provided by Autism Speaks, the UCSD Christini Fund, the Jane Botsford-Johnson Foundation, the Wright Family Foundation, the Lennox Foundation, the Larry L. Hillblom Foundation, the Gerber Foundation, and Hailey's Wish Foundation.


Story Source:

The above story is based on materials provided by University of California, San Diego Health Sciences. Note: Materials may be edited for content and length.


Journal Reference:

  1. Robert K. Naviaux, Zarazuela Zolkipli, Lin Wang, Tomohiro Nakayama, Jane C. Naviaux, Thuy P. Le, Michael A. Schuchbauer, Mihael Rogac, Qingbo Tang, Laura L. Dugan, Susan B. Powell. Antipurinergic Therapy Corrects the Autism-Like Features in the Poly(IC) Mouse Model. PLoS ONE, 2013; 8 (3): e57380 DOI: 10.1371/journal.pone.0057380

Cite This Page:

University of California, San Diego Health Sciences. "Drug treatment corrects autism symptoms in mouse model." ScienceDaily. ScienceDaily, 13 March 2013. <www.sciencedaily.com/releases/2013/03/130313182019.htm>.
University of California, San Diego Health Sciences. (2013, March 13). Drug treatment corrects autism symptoms in mouse model. ScienceDaily. Retrieved July 24, 2014 from www.sciencedaily.com/releases/2013/03/130313182019.htm
University of California, San Diego Health Sciences. "Drug treatment corrects autism symptoms in mouse model." ScienceDaily. www.sciencedaily.com/releases/2013/03/130313182019.htm (accessed July 24, 2014).

Share This




More Mind & Brain News

Thursday, July 24, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

New Painkiller Designed To Discourage Abuse: Will It Work?

New Painkiller Designed To Discourage Abuse: Will It Work?

Newsy (July 24, 2014) The FDA approved Targiniq ER on Wednesday, a painkiller designed to keep users from abusing it. Like any new medication, however, it has doubters. Video provided by Newsy
Powered by NewsLook.com
China's Ageing Millions Look Forward to Bleak Future

China's Ageing Millions Look Forward to Bleak Future

AFP (July 24, 2014) China's elderly population is expanding so quickly that children struggle to look after them, pushing them to do something unexpected in Chinese society- move their parents into a nursing home. Duration: 02:07 Video provided by AFP
Powered by NewsLook.com
Idaho Boy Helps Brother With Disabilities Complete Triathlon

Idaho Boy Helps Brother With Disabilities Complete Triathlon

Newsy (July 23, 2014) An 8-year-old boy helped his younger brother, who has a rare genetic condition that's confined him to a wheelchair, finish a triathlon. Video provided by Newsy
Powered by NewsLook.com
Huge Schizophrenia Study Finds Dozens Of New Genetic Causes

Huge Schizophrenia Study Finds Dozens Of New Genetic Causes

Newsy (July 22, 2014) The 83 new genetic markers could open dozens of new avenues for schizophrenia treatment research. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins