Gastrointestinal problems in a valproic acid-induced rat model of autism: From maternal intestinal health to offspring intestinal function
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Published on: March 25, 2016
Sha Li1,2, Nan Zhang1, Wang Li2
1Institute of Acupuncture and Moxibustion, China Academy of Chinese Medical Sciences, Beijing 100000, China.
Insights
Maternal gut inflammation and microbiota changes during pregnancy may contribute to gastrointestinal problems in autism spectrum disorder (ASD) offspring. This study in rats suggests a link between prenatal valproic acid exposure and these issues.
Area of Science:
- Neuroscience
- Gastroenterology
- Microbiology
Background:
- Autism spectrum disorder (ASD) is a neurodevelopmental condition marked by social and behavioral challenges.
- Gastrointestinal (GI) issues are prevalent in ASD individuals, with previous research suggesting links to intestinal inflammation and mother-to-infant microbiome transmission.
Purpose of the Study:
- To investigate the potential relationship between maternal intestinal inflammation, gut microbiota alterations, and GI problems in offspring with ASD.
Main Methods:
- An autism spectrum disorder (ASD) rat model was established using prenatal valproic acid (VPA) exposure.
- Enzyme-linked immunosorbent assay (ELISA) and fecal 16S rRNA sequencing were employed to assess GI parameters and microbial composition.
Main Results:
- Prenatal VPA exposure induced pathological changes in maternal intestines, altering gut microbiota and increasing inflammatory factors.
- Offspring exposed prenatally to VPA exhibited impaired duodenal motility and elevated inflammatory markers.
Conclusions:
- Maternal intestinal inflammation and gut microbiota abnormalities may play a role in the etiology of GI problems observed in autism spectrum disorder (ASD).
- Further investigation is warranted to elucidate the causal mechanisms and develop targeted treatments for GI dysfunction in ASD.
Background:
Autism spectrum disorder (ASD) is a developmental disorder characterized by social deficits and repetitive behavior. Gastrointestinal (GI) problems, such as constipation, diarrhea, and inflammatory bowel disease, commonly occur in patients with ASD. Previously, GI problems of ASD patients were attributed to intestinal inflammation and vertical mother-to-infant microbiome transmission.
Aim:
To explore whether GI problems in ASD are related to maternal intestinal inflammation and gut microbiota abnormalities.
Methods:
An ASD rat model was developed using valproic acid (VPA). Enzyme-linked immunosorbent assay and fecal 16S rRNA sequencing were used to test GI changes.
Results:
VPA exposure during pregnancy led to pathological maternal intestinal changes, resulting in alterations in maternal gut microbiota. Additionally, the levels of inflammatory factors also increased. Moreover, prenatal exposure to VPA resulted in impaired duodenal motility in the offspring as well as increased levels of inflammatory factors.
Conclusion:
GI problems in ASD may be associated with maternal intestinal inflammation and microbiota abnormality. Future research is required to find more evidence on the etiology and treatment of GI problems in ASD.
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