Significant First Step In The Design Of A Multivalent Vaccine Against Several Autism-Related Gut Bacteria
The groundbreaking study by Brittany Pequegnat and Guelph chemistry professor Mario Monteiro appears this month in the journal Vaccine.
They developed a carbohydrate-based vaccine against the gut bug Clostridium bolteae.
C. bolteae is known to play a role in gastrointestinal disorders, and it often shows up in higher numbers in the GI tracts of autistic children than in those of healthy kids.
More than 90 per cent of children with autism spectrum disorders suffer from chronic, severe gastrointestinal symptoms. Of those, about 75 per cent suffer from diarrhea, according to current literature.
"Little is known about the factors that predispose autistic children to C. bolteae," said Monteiro. Although most infections are handled by some antibiotics, he said, a vaccine would improve current treatment.
"This is the first vaccine designed to control constipation and diarrhea caused by C. bolteae and perhaps control autism-related symptoms associated with this microbe," he said.
Autism cases have increased almost sixfold over the past 20 years, and scientists don't know why. Although many experts point to environmental factors, others have focused on the human gut.
Some researchers believe toxins and/or metabolites produced by gut bacteria, including C. bolteae, may be associated with symptoms and severity of autism, especially regressive autism.
Pequegnat, a master's student, and Monteiro used bacteria grown by Mike Toh, a Guelph PhD student in the lab of microbiology professor Emma Allen-Vercoe.
The new anti- C. bolteae vaccine targets the specific complex polysaccharides, or carbohydrates, on the surface of the bug.
The vaccine effectively raised C. bolteae-specific antibodies in rabbits. Doctors could also use the vaccine-induced antibodies to quickly detect the bug in a clinical setting, said Monteiro.
The vaccine might take more than 10 years to work through preclinical and human trials, and it may take even longer before a drug is ready for market, Monteiro said.
"But this is a significant first step in the design of a multivalent vaccine against several autism-related gut bacteria," he said.
Monteiro has studied sugar-based vaccines for two other gastric pathogens: Campylobacter jejuni, which causes travellers' diarrhea; and Clostridium difficile, which causes antibiotic-associated diarrhea.
The research was supported by the Natural Sciences and Engineering Research Council.
University of Guelph
Source: EurekAlert!, the online, global news service operated by AAAS, the science society
Please use one of the following formats to cite this article in your essay, paper or report:
University of Guelph. "Significant First Step In The Design Of A Multivalent Vaccine Against Several Autism-Related Gut Bacteria." Medical News Today. MediLexicon, Intl., 26 Apr. 2013. Web.
24 Oct. 2016. <http://www.medicalnewstoday.com/releases/259628.php>
University of Guelph. (2013, April 26). "Significant First Step In The Design Of A Multivalent Vaccine Against Several Autism-Related Gut Bacteria." Medical News Today. Retrieved from
Please note: If no author information is provided, the source is cited instead.
Contact our news editors
For any corrections of factual information, or to contact our editorial team, please see our contact page.
Copyright Medical News Today: Excluding email/sharing services explicitly offered on this website, material published on Medical News Today may not be reproduced, or distributed without the prior written permission of Medilexicon International Ltd. Please contact us for further details.