SEARCH Articles Figures Tables Advantages and Limitations of Performing Studies in hPT Primary Cell Cultures Critical Studies for Drug Discovery in hPT Primary Cell Cultures HPT Resin HPTS (8-hydroxy 1,3,6 trisulfonate HPTS assay HYDROXYPYRENE-1,3,6-TRISULFONIC ACID TRISODIUM SALT (HPTS) (PYRANINE) Hypothalamic-Pituitary-Thyroid (HPT) Axis Primary Cultures of hPT Cells Toxicology Studies in hPT Primary Cell Cultures Validation of hPT Primary Cell Cultures