Identification of Estrogen-Related Receptor α Agonists in the Tox21 Compound Library

Area of Science:

• Endocrinology
• Molecular Biology
• Cancer Research

Background:

• Estrogen-related receptor alpha (ERRα) is a nuclear receptor involved in energy balance, mitochondrial function, and cancer progression.
• ERRα's role in ovarian, breast, and colon cancers, as well as its link to obesity and type 2 diabetes via PGC-1α, highlights its therapeutic potential.
• Identifying ERRα activators is crucial for understanding and potentially treating these conditions.

Purpose of the Study:

• To screen a large compound library for agonists of estrogen-related receptor alpha (ERRα).
• To identify novel compounds that modulate ERRα signaling pathways.
• To discover potential endocrine disruptors impacting ERRα activity.

Main Methods:

• Screening of approximately 10,000 compounds from the Tox21 10K collection using HEK 293 cell lines with ERRα-reporter constructs.
• Analysis of agonist clusters based on structural similarity, including statins.
• Follow-up assays, including other nuclear receptor assays and small interfering RNA knockdown, to validate ERRα modulators and assess specificity.

Main Results:

• Identification of multiple agonist clusters targeting ERRα from the compound screen.
• Validation of specific compounds with ERRα agonist activity.
• Discovery of potential endocrine-disrupting compounds through ERRα pathway modulation.

Conclusions:

• This study represents the first comprehensive analysis to discover potential endocrine disruptors targeting the ERRα signaling pathway.
• The identified compounds provide valuable tools for further research into ERRα function in metabolic diseases and cancer.
• The findings underscore the importance of ERRα as a target for therapeutic intervention and understanding endocrine disruption.