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Publications

Journal Article Review Research Support, N.I.H., Extramural Ppublish 35 citations

PubMed: 35305256 DOI: 10.1007/s40572-022-00347-7

Prenatal Diet as a Modifier of Environmental Risk Factors for Autism and Related Neurodevelopmental Outcomes.

Curr Environ Health Rep 9(2):324-338

Authors: Megan Bragg, Jorge E Chavarro, Ghassan B Hamra, Jaime E Hart, Loni Philip Tabb, Marc G Weisskopf, Heather E Volk, Kristen Lyall

Affiliations

  • AJ Drexel Autism Institute, Drexel University, 3020 Market St. Philadelphia, PA, 19104, USA.
  • Department of Nutrition, Harvard School of Public Health, Boston, MA, USA.
  • Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, USA.
  • Channing Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA.
  • Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, MA, USA.
  • Department of Epidemiology and Biostatistics, Dornsife School of Public Health, Drexel University, 3020 Market St. Philadelphia, PA, 19104, USA.
  • Department of Mental Health, Johns Hopkins Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, USA.
  • AJ Drexel Autism Institute, Drexel University, 3020 Market St. Philadelphia, PA, 19104, USA.
  • Department of Epidemiology and Biostatistics, Dornsife School of Public Health, Drexel University, 3020 Market St. Philadelphia, PA, 19104, USA.

Abstract

PURPOSE OF REVIEW

Environmental chemicals and toxins have been associated with increased risk of impaired neurodevelopment and specific conditions like autism spectrum disorder (ASD). Prenatal diet is an individually modifiable factor that may alter associations with such environmental factors. The purpose of this review is to summarize studies examining prenatal dietary factors as potential modifiers of the relationship between environmental exposures and ASD or related neurodevelopmental outcomes.

RECENT FINDINGS

Twelve studies were identified; five examined ASD diagnosis or ASD-related traits as the outcome (age at assessment range: 2-5 years) while the remainder addressed associations with neurodevelopmental scores (age at assessment range: 6 months to 6 years). Most studies focused on folic acid, prenatal vitamins, or omega-3 fatty acids as potentially beneficial effect modifiers. Environmental risk factors examined included air pollutants, endocrine disrupting chemicals, pesticides, and heavy metals. Most studies took place in North America. In 10/12 studies, the prenatal dietary factor under study was identified as a significant modifier, generally attenuating the association between the environmental exposure and ASD or neurodevelopment. Prenatal diet may be a promising target to mitigate adverse effects of environmental exposures on neurodevelopmental outcomes. Further research focused on joint effects is needed that encompasses a broader variety of dietary factors, guided by our understanding of mechanisms linking environmental exposures with neurodevelopment. Future studies should also aim to include diverse populations, utilize advanced methods to optimize detection of novel joint effects, incorporate consideration of timing, and consider both synergistic and antagonistic potential of diet.

MeSH

Environmental Exposure, Autism Spectrum Disorder, Diet, Autistic Disorder, Air, Risk Factors, Environmental Health, Neurodevelopment

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