Gastroenterology

Anxiety, Sensory Over-responsivity, and Gastrointestinal Problems in Children with Autism Spectrum Disorders

Source: 
Journal of Abnormal Child Psychology
Date Published: 
January 2013
Abstract: 

Anxiety, sensory processing problems and gastrointestinal (GI) issues occur frequently in children with ASD. This study examines the relationship between the three and finds that sensory over-responsivity and anxiety are highly associated and linked to GI problems.

Modeling an Autism Risk Factor in Mice Leads to Permanent Immune Dysregulation

Source: 
Proceedings of the National Academy of Sciences
Date Published: 
July 31, 2012
Abstract: 

"Increasing evidence highlights a role for the immune system in the pathogenesis of autism spectrum disorder (ASD), as immune dysregulation is observed in the brain, periphery, and gastrointestinal tract of ASD individuals. Furthermore, maternal infection (maternal immune activation, MIA) is a risk factor for ASD. Modeling this risk factor in mice yields offspring with the cardinal behavioral and neuropathological symptoms of human ASD."

Study Finds No Link Between Autism and Gut Microbes

Source: 
SFARI
Date Published: 
November 5, 2012
Abstract: 

Contradicting a popular hypothesis in autism, a new study from Australia has found no connection between autism and bacteria in the gut. For the peer-reviewed article, click here: http://www.ncbi.nlm.nih.gov/pubmed/22997101

Gastrointestinal Problems In Autistic Children May Be Due To Gut Bacteria

Source: 
Medical News Today
Date Published: 
January 11, 2012
Abstract: 

The underlying reason autism is often associated with gastrointestinal problems is an unknown, but new results to be published in the online journal mBio® on January 10 reveal that the guts of autistic children differ from other children in at least one important way: many children with autism harbor a type of bacteria in their guts that non-autistic children do not.

Association Between Behavioral Features and Gastrointestinal Problems Among Children with Autism Spectrum Disorder

Source: 
Journal of Autism and Developmental Disorders - Maenner, M.J. et al.
Date Published: 
October 25, 2011
Year Published: 
2011

Recent reports suggest certain behaviors among children with autism spectrum disorders (ASD) may indicate underlying gastro-intestinal (GI) problems, and that the presence of these behaviors may help alert primary care providers to the need to evaluate a child with ASD for GI problems. The purpose of this population-based study of 487 children with ASD, including 35 (7.2%) with a medically documented history of GI problems, was to compare behavioral features of children with and without a history of GI problems. Unusual sleeping or eating habits and oppositional behavior were significantly associated with GI problems. These behaviors, however, were frequent in both children with and without GI problems, suggesting they may have limited utility in a screening capacity for GI problems.

ASF-funded study: JADD – “Challenging behaviors frequent in autistic children with and without GI problems; therefore behaviors are unlikely to predict GI problems in children with ASD”—Maenner et al.

Source: 
Journal of Autism and Developmental Disorders
Date Published: 
October 25, 2011

Association Between Behavioral Features and Gastrointestinal Problems Among Children with Autism Spectrum Disorder
Matthew J. Maenner • Carrie L. Arneson • Susan E. Levy • Russell S. Kirby • Joyce S. Nicholas • Maureen S. Durkin
Journal of Autism and Developmental Disorders | DOI 10.1007/s10803-011-1379-6

Copyright: Springer Science+Business Media, LLC 2011
 

Abstract : Recent reports suggest certain behaviors among children with autism spectrum disorders (ASD) may indicate underlying gastro-intestinal (GI) problems, and that the presence of these behaviors may help alert primary care providers to the need to evaluate a child with ASD for GI problems. The purpose of this population-based study of 487 children with ASD, including 35 (7.2%) with a medically documented history of GI problems, was to compare behavioral features of children with and without a history of GI problems. Unusual sleeping or eating habits and oppositional behavior were significantly associated with GI problems. These behaviors, however, were frequent in both children with and without GI problems, suggesting they may have limited utility in a screening capacity for GI problems.

 

Conclusion: Certain behaviors, including abnormalities in sleep patterns, abnormalities in mood or affect, and argumentative, oppositional, defiant or destructive behavior were described significantly more often in children with ASD who also had GI problems than in those with ASD and no history of GI problems. These features (often described as characteristics of autism) may be more common among children with autism who also have GI problems. However, because these behaviors are also frequent in children with ASD and no GI problems (nearly all children had 1 or more behaviors), they are unlikely to efficiently predict GI problems in children with ASD. Consideration of medical, biological, or physiological co-occurring conditions, genetic susceptibility, diet and nutrition, and medication use are necessary to determine whether in children with ASD both behavioral presentation and GI problems might be associated with other underlying factors.

 

Children With Autism And Gastrointestinal Symptoms Have Altered Digestive Genes

Source: 
Medical News Today
Date Published: 
September 11, 2011
Abstract: 

Researchers at the Center for Infection and Immunity (CII) at Columbia University's Mailman School of Public Health and at the Harvard Medical School report that children with autism and gastrointestinal disturbances have altered expression of genes involved in digestion. These variations may contribute to changes in the types of bacteria in their intestines.

Minocycline Promising in Fragile X Syndrome

Source: 
Medscape Today
Date Published: 
September 7, 2010
Abstract: 

Parents of children with fragile X syndrome report that minocycline led to positive improvements in language, attention levels and behavior. They also report experiencing adverse side effects such as mild gastrointestinal issues and some increased irritability.

Popular Autism Diet Does Not Demonstrate Behavioral Improvement

Source: 
Science Daily
Date Published: 
May 20, 2010
Abstract: 

A popular belief that specific dietary changes can improve the symptoms of children with autism was not supported by a tightly controlled University of Rochester study, which found that eliminating gluten and casein from the diets of children with autism had no impact on their behavior, sleep or bowel patterns.

GI Problems and Autism Link? Experts Say No

Source: 
ABC News
Date Published: 
April 16, 2010
Abstract: 

British Medical Journal examined the continued belief by many of a possible connection between the developmental disorder and the chronic inflammatory bowel disease, that was first dubbed "autistic enterocolitis" by British physician Dr. Andrew Wakefield. But beyond Wakefield's account, the evidence of any connection between bowel disease and autism is slim, the editorial stated.