RNF5 inhibitor inh-02, a potent E3 ubiquitin ligase RNF5 RMA1 inhibitor, demonstrates significant efficacy in rescuing F508del-CFTR with an EC50 of 2.2 uM in bronchial epithelial cells homozygous for the F508del mutation. This compound is valuable for cystic fibrosis research[1].
GLPG2451 is a cystic fibrosis transmembrane conductance regulator (CFTR) potentiator. It effectively potentiates low temperature rescued F508delCFTR (EC50: 11.1 nM).
C4 Ceramide is a bioactive sphingolipid and cell-permeable analog of naturally occurring ceramides. [1] [2] [3] It inhibits IL-4 production by 16% in EL4 T cells stimulated with phorbol 12-myristate 13-acetate when used at a concentration of 10 μM. [1] C4 Ceramide is cytotoxic to SK-BR-3 and MCF-7 Adr breast cancer cells (IC50s = 15.9 and 19.9 μM, respectively). [2] C4 Ceramide also increases maturation and stability of cystic fibrosis transmembrane conductance regulator (CFTR) proteins bearing the F508deletion (F508del) mutation, enhances cAMP-activated chloride secretion, and suppresses secretion of IL-8 in primary epithelial cells isolated from patients with cystic fibrosis.[3]