Cited by 131Autism Spectrum Disorder ResearchGut microbiota and healthChild Nutrition and Feeding Issues

Autism: Metabolism, Mitochondria, and the Microbiome

Open access
Macfabe, Derrick·2013·Global Advances in Health and Medicine

Abstract

New approaches are needed to examine the diverse symptoms and comorbidities of the growing family of neurodevelopmental disorders known as autism spectrum disorder (ASD). ASD originally was thought to be a static, inheritable neurodevelopmental disorder, and our understanding of it is undergoing a major shift. It is emerging as a dynamic system of metabolic and immune anomalies involving many organ systems, including the brain, and environmental exposure. The initial detailed observation and inquiry of patients with ASD and related conditions and the histories of their care-givers and families have been invaluable. How gastrointestinal (GI) factors are related to ASD is not yet clear. Nevertheless, many patients with ASD have a history of previous antibiotic exposure or hospitalization, GI symptoms, abnormal food cravings, and unique intestinal bacterial populations, which have been proposed to relate to variable symptom severity. In addition to traditional scientific inquiry, detailed clinical observation and recording of exacerbations, remissions, and comorbidities are needed. This article reviews the role that enteric short-chain fatty acids, particularly propionic (also called propanoic) acid, produced from ASD-associated GI bacteria, may play in the etiology of some forms of ASD. Human populations that are partial metabolizers of propionic acid are more common than previously thought. The results from pre-clinical laboratory studies show that propionic acid-treated rats display ASD-like repetitive, perseverative, and antisocial behaviors and seizure. Neurochemical changes, consistent and predictive with findings in ASD patients, including neuroinflammation, increased oxidative stress, mitochondrial dysfunction, glutathione depletion, and altered phospholipid/acylcarnitine profiles, have been observed. Propionic acid has bioactive effects on (1) neurotransmitter systems, (2) intracellular acidification and calcium release, (3) fatty acid metabolism, (4) gap junction gating, (5) immune function, and (6) alteration of gene expression that warrant further exploration. Traditional scientific experimentation is needed to verify the hypothesis that enteric short-chain fatty acids may be a potential environmental trigger in some forms of ASD. Novel collaborative developments in systems biology, particularly examining the role of the micro-biome and its effects on host metabolism, immune and mitochondrial function, and gene expression, hold great promise in ASD.

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.7453/gahmj.2013.089

Cites

96 of 96 references verified0 citation errors · 0 not checkable

Statistics

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • Even beneficial metabolites such as short-chain fatty acids may exert neurotoxicity.

    “Even beneficial metabolites such as short-chain fatty acids may exert neurotoxicity.”

    From The Gut Microbiome and the Brain (2014) · cites this paper as [100]

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Cites

Flagged first, then by citations

Research works printed but not linked: 1

  1. [85]Gottschall E Breaking the vicious cycle: intestinal health through diet Baltimore, Ontario, Canada: The Kirkton Press; 1994

Cited by

Sorted by citations

Authors
Macfabe, D.
Affiliations
Western University (CA)
Corresponding author
Macfabe, Derrick
Venue
Global Advances in Health and Medicine
Published
2013-11
Volume
2
Issue
6
Pages
52-66
ISSN
  • 2164-9561 (ISSN-L)
  • 2164-957X
OpenAlex
W1970972871
Cited by
131
References
96
Citations by year
2026: 6 · 2025: 5 · 2024: 12 · 2023: 2 · 2022: 8 · 2021: 18 · 2020: 8 · 2019: 11 · 2018: 17 · 2017: 11 · 2016: 9 · 2015: 10 · 2014: 11 · 2013: 1
FWCI
5.67
Type
journal article
Language
en
Open access
Locations
  • Global Advances in Health and Medicine (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
Autism Research Institute
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Autism Spectrum Disorder Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Gut microbiota and health
  • Health Sciences › Medicine › Psychiatry and Mental health › Child Nutrition and Feeding Issues
Keywords
autism spectrum disorder, gut microbiota, propionic acid, short-chain fatty acids, mitochondrial dysfunction, oxidative stress, neuroinflammation, glutathione depletion, acylcarnitines, phospholipids, neurodevelopmental disorders, environmental triggers, antibiotic exposure, gastrointestinal symptoms, neurobehavioral phenotype, systems biology

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review