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Special Chemical Causes Fetal Defects, US Study Reveals Key Reason

From Liberty Times · () Chinese

Translated from Chinese, summarized and contextualized by DistantNews.

At a glance

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  • A U.S. study identified perfluorodecanoic acid (PFDA), a type of PFAS, as a potent cause of fetal craniofacial abnormalities.
  • PFDA disrupts retinoic acid, a crucial molecule for early fetal development, leading to potential birth defects like underdeveloped eyes and abnormal jaw formation.
  • Researchers aim to use these findings to develop better screening tools for identifying the risks associated with different PFAS compounds.

Scientists have identified a specific chemical compound that significantly interferes with fetal development, leading to severe craniofacial abnormalities. A recent U.S. study published in ACS Chemical Toxicology Research has pinpointed perfluorodecanoic acid (PFDA), a member of the PFAS family of chemicals, as a key culprit.

The research found that PFDA disrupts retinoic acid, a vital molecule essential for the proper formation of the face and head during early pregnancy. Retinoic acid regulates hundreds of genes, and maintaining its precise concentration is critical for healthy development. Fetuses rely entirely on their mothers for this balance, as they cannot produce or safely eliminate excess retinoic acid themselves.

PFDA inhibits CYP26A1, the enzyme responsible for breaking down excess retinoic acid. When this enzyme is inhibited, retinoic acid can accumulate to harmful levels, disrupting normal facial development.

— Study AuthorsExplanation of the biological mechanism by which PFDA causes developmental issues.

PFDA interferes with this process by inhibiting CYP26A1, an enzyme responsible for breaking down excess retinoic acid. When this enzyme is suppressed, retinoic acid can accumulate to harmful levels, disrupting normal facial development. The chemical further impacts development by reducing the activity of genes that produce CYP26A1, creating a "double hit" effect on early development.

According to the study, this disruption can result in severe craniofacial malformations in fetuses, including underdeveloped eyes and abnormal jaw formation. While low-level exposure to PFAS is common, higher exposure can occur through contaminated drinking water or proximity to manufacturing plants. The researchers hope their findings will aid in developing more targeted laboratory tests and computational screening tools to rapidly assess the risks posed by various PFAS chemicals, helping regulators and manufacturers identify and phase out the most dangerous substances.

PFDA can lead to severe craniofacial malformations in fetuses, including underdeveloped eyes and abnormal jaw formation.

— Study AuthorsDescribing the specific birth defects linked to PFDA exposure.
DistantNews Editorial

Originally published by Liberty Times in Chinese. Translated, summarized, and contextualized by our editorial team with added local perspective. Read our editorial standards.

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