Development of Novel Cell Lines for High-Throughput Screening to Detect Estrogen-Related Receptor Alpha Modulators.

ABSTRACT: Estrogen-related receptor alpha (ERR?), the first orphan nuclear receptor discovered, is crucial for the control of cellular energy metabolism. ERR? and its coactivator, peroxisome proliferator-activated receptor gamma coactivator 1-alpha (PGC-1?), are required for rapid energy production in response to environmental challenges. They have been implicated in the etiology of metabolic disorders such as type 2 diabetes and metabolic syndrome. ERR? also plays a role in the pathogenesis of breast cancer. Identification of compounds that modulate ERR? signaling may elucidate environmental factors associated with these diseases. Therefore, we developed stable cell lines containing an intact ERR? signaling pathway, with and without the coactivator PGC-1?, to use as high-throughput screening tools to detect ERR? modulators. The lentiviral PGC-1? expression constructs and ERR? multiple hormone response element (MHRE) reporters were introduced into HEK293T cells that express endogenous ERR?. A cell line expressing the reporter alone was designated "ERR." A second cell line expressing both reporter and PGC-1? was named "PGC/ERR." Initial screenings of the Library of Pharmacologically Active Compounds (LOPAC) identified 33 ERR and 22 PGC/ERR agonists, and 54 ERR and 15 PGC/ERR antagonists. Several potent ERR? agonists were dietary plant compounds (e.g., genistein). In conclusion, these cell lines are suitable for high-throughput screens to identify environmental chemicals affecting metabolic pathways and breast cancer progression.

SUBMITTER: Teng CT 

PROVIDER: S-EPMC5486949 | biostudies-literature | 2017 Jul

REPOSITORIES: biostudies-literature