SR 0987 is an agonist of the T cell-specific isoform of RORγ (RORγt, retinoic acid receptor-related orphan receptor-γt), inducing reporter gene expression with an EC50 value of ~800 nM. Stimulation of mouse EL4 T lymphocytes with SR 0987, following activation with PMA and ionomycin , increases expression of the RORγt target IL-17, while expression of the programmed cell death protein PD-1 is decreased and granzyme B is unchanged. Decreased cell surface PD-1 protein, assessed by flow cytometry, is observed in a variety of T cells treated with SR 0987.
