rc 18

Telitacicept (RC18), a fully human TACI-Fc fusion protein, acts as a dual inhibitor of B lymphocyte stimulator (BLyS) and APRIL (a proliferation-inducing ligand), effectively impeding B lymphocyte proliferation. This compound is applicable in researching B-cell autoimmune diseases [1].

Corrector C18 is a class I mutation corrector which rescues CFTR mutations in nucleotide-binding domain 1 (NBD1) by modulating proteostasis.

ARC186 is a highly potent aptamer that serves as a complement inhibitor by blocking the convertase-catalyzed activation of C5.

NH2-C6-ARC186 is a derivative of the aptamer ARC186, featuring an NH2-C6 moiety that enables coupling to various peptides or molecules. As a potent complement inhibitor, it operates by inhibiting convertase-mediated C5 activation [1].

GPX4-IN-18 (Compound 17) is a ferrocene-containing inhibitor of glutathione peroxidase 4 (GPX4), and it also acts as a ferroptosis inducer. It enhances the production of reactive oxygen species (ROS) and malondialdehyde (MDA) levels in OS-RC-2 clear cell renal carcinoma cells. In HT-1080 cells, GPX4-IN-18 induces ferroptosis with IC50 values of 0.007 μM (without iron inhibitor-1) and 1.486 μM (with iron inhibitor-1). Additionally, GPX4-IN-18 reduces tumor volume and intratumoral GPX4 levels in an OS-RC-2 xenograft mouse model.

Neuromedin C is a bombesin-like neuropeptide that stimulates uterine smooth muscle contraction and the release of gastrin , somatostatin, and amylase in rats. Neuromedin C is a truncated form of gastrin-releasing peptide corresponding to the GRP amino acids 18-27. It inhibits GRP and bombesin binding to rat pancreatic membranes (IC50s = 0.4 and 2.2 nM, respectively), which can be reduced by sodium chloride and guanylyl imidodiphosphate . Neuromedin C induces scratching and mast cell degranulation in mice when administered intradermally at doses ranging from 1 to 300 nmol/site, which is inhibited by the BB2 bombesin receptor agonist RC-3095 and reduced in mast cell-deficient mice. Neuromedin C (3.2 nmol/kg, i.p.) reduces rat glucose consumption by approximately 50% for up to one hour.