Are structural analogues to bisphenol a safe alternatives?

Area of Science:

• Endocrinology
• Toxicology
• Environmental Health

Background:

• Bisphenol A (BPA) exposure is widespread and linked to potential low-dose health effects.
• Developing safer alternatives to BPA is crucial due to structural similarities and potential risks.
• Structural analogues of BPA are already found in food and humans, raising concerns about their safety.

Purpose of the Study:

• To compare the hazards of bisphenol B (BPB), bisphenol E (BPE), bisphenol F (BPF), bisphenol S (BPS), and 4-cumylphenol (HPP) against Bisphenol A (BPA).
• To elucidate the endocrine-disrupting potential and other toxicological effects of BPA alternatives.

Main Methods:

• In vitro studies assessing steroidogenesis, receptor activity (estrogen and androgen), and biomarkers of effect.
• Quantitative Structure-Activity Relationship (QSAR) modeling to predict compound activity.

Main Results:

• All tested BPA alternatives exhibited similar qualitative effects on estrogen and androgen receptor activities as BPA.
• Most alternatives showed potencies comparable to BPA, interfering with steroidogenesis by altering androgen, estrogen, and progestagen levels.
• Specific compounds demonstrated differential effects on corticosteroid synthesis, with BPS showing high efficacy on 17α-hydroxyprogesterone but being less estrogenic and antiandrogenic than BPA.
• Potential for DNA damage, carcinogenicity, oxidative stress, metabolic effects, and skin sensitization was indicated for some alternatives.

Conclusions:

• Endocrine system interference is the primary effect observed for the tested BPA structural analogues.
• Substitution of BPA with these analogues requires caution due to shared and compound-specific toxicological profiles.
• Further research is needed to fully understand the long-term health implications of BPA alternatives.