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The association between phthalate exposure and pubertal development.

Mi Ra Kim1, Mo Kyung Jung2, Hye Mi Jee2

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European Journal of Pediatrics
|January 11, 2024
PubMed
Summary

Phthalate exposure may hinder pubertal development in boys, particularly high molecular weight phthalates (HMWP). In contrast, low molecular weight phthalates (LMWP) were linked to advanced puberty in girls, suggesting sex-specific effects.

Keywords:
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Area of Science:

  • Endocrinology and Toxicology
  • Environmental Health
  • Pediatric Development

Background:

  • Phthalates are chemicals with known antiandrogenic effects.
  • Previous studies on phthalate exposure and pubertal development in children have shown inconsistent findings.
  • Distinguishing effects of high molecular weight phthalates (HMWP) and low molecular weight phthalates (LMWP) is crucial.

Purpose of the Study:

  • To investigate the association between phthalate exposure and pubertal development in Korean children.
  • To determine if HMWP and LMWP have differential effects on pubertal development in boys and girls.

Main Methods:

  • Urinary phthalate metabolites (4 HMWPs, 3 LMWPs) were measured in 236 boys and 202 girls aged 10-12 years.
  • Pubertal stages were self-reported by parents.
  • Sex steroid levels (testosterone and estradiol) were analyzed.
  • Generalized linear regression was used, adjusting for age, BMI z-score, and birth history.

Main Results:

  • In boys, higher levels of both HMWP and LMWP were inversely associated with pubertal stages.
  • Higher HMWP levels in boys were also linked to significantly lower testosterone levels.
  • In girls, higher LMWP levels were significantly associated with advanced pubertal stages, but no association was found with HMWP or estradiol levels.

Conclusions:

  • Phthalate exposure, particularly HMWP, may negatively impact male pubertal development.
  • LMWP exposure shows a potential association with accelerated pubertal development in girls.
  • Further research is needed to confirm the relationship between phthalate exposure and pubertal development in girls.