Recent research published in Endocrinology, shows a link between exposure to certain endocrine-disrupting chemicals (EDCs) and early puberty in girls. These EDCs mimic, block, or interfere with hormones. They are causing concern as the rate of early puberty in girls continues to rise. Early puberty is linked to a higher risk of various health issues. These various health problems include psychosocial problems, obesity, diabetes, cardiovascular disease, and breast cancer.
The Study: Screening of Environmental Compounds
The study was led by Dr. Natalie Shaw of the National Institutes of Health’s (NIH) in Durham, N.C. The research team conducted an extensive screening of 10,000 environmental compounds. They used human brain cells that control the reproductive axis to identify substances contributing to early puberty in girls.
Among the identified substances are musk ambrette and a class of medications known as cholinergic agonists. Musk ambrette, a fragrance used in some detergents, perfumes, and personal care products,
Dr. Shaw impressed upon the need for further research to confirm these findings. However, the study’s results are concerning. Musk ambrette, can cross the blood-brain barrier, as suggested by rat studies.
It stimulate key receptors in the hypothalamus, specifically the gonadotropin-releasing hormone receptor (GnRHR) and the kisspeptin receptor (KISS1R). Hence, the ability to stimulate the receptors raises the possibility that these compounds could prematurely activate the reproductive axis in children.
Safety of Personal Care Products
Musk ambrette’s presence in personal care products is alarming. Canadian and European regulations have restricted its use due to potential toxicity, and the U.S. Food and Drug Administration removed the fragrance from its “generally recognized as safe” list. However, it remains available in some products on the market. Dr. Shaw advises parents to exercise caution and use only federally regulated personal care products for their children.
Methodology: Advanced Screening Techniques
The research team employed advanced screening techniques to conduct their study. They screened a Tox21 10,000-compound library of licensed pharmaceuticals, environmental chemicals, and dietary supplements. These were screened against a human cell line overexpressing GnRHR or KISS1R. Follow-up analysis revealed that musk ambrette increased the number of GnRH neurons and GnRH expression.
Dr. Menghang Xia is a co-author of the study and a researcher at the National Center for Advancing Translational Sciences (NCATS). He highlighted the effectiveness of using human hypothalamic neurons and zebrafish as models for identifying environmental substances that stimulate KISS1R and GnRHR. This multidisciplinary effort significantly reduced the time and cost associated with assessing environmental chemicals for their potential effects on human health.
Conclusion
The study, funded by NIEHS and NCATS, highlights the importance of continued research into the impact of EDCs on early puberty in girls. While the findings are preliminary, they suggest that parents should be cautious about the personal care products they use for their children.
By taking proactive steps, parents and regulators can help mitigate the potential risks associated with EDC exposure, safeguarding the health and well-being of future generations.
(Newswise)
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