qsox1

Ebselen (CCG-39161) is a organoselenium compound with anti-inflammatory, anti-oxidant and cytoprotective activity. Ebselen acts as a glutathione peroxidase mimetic and is thereby able to prevent cellular damage induced by reactive oxygen species (ROS). In addition, this agent inhibits the activity of a variety of enzymes including nitric oxide synthase (NOS), 5-lipoxygenase, cyclooxygenase, protein kinase C (PKC), NADPH oxidase and gastric H+ K+-ATPase. Furthermore, ebselen may be neuroprotective due to its ability to neutralize free radicals upon NMDA receptor activation thus, reducing lipoperoxidation mediated by glutamate-induced excitotoxicity.

SBI-183 is an orally active QSOX1 inhibitor (Kd: 20 μM). It can inhibit the proliferation and invasion phenotypes of renal carcinoma cell lines, triple-negative breast cancer cell lines, lung adenocarcinoma cell lines, and pancreatic ductal adenocarcinoma. In vivo, SBI-183 suppresses tumor growth in two human renal cell carcinoma xenograft mouse models.

F1-RIBOTAC is a ribonuclease-targeting chimera (RIBOTAC) that reduces QSOX1-amRNA expression through an RNase L-dependent mechanism. It is applicable in cancer research. (Pink: RNA ligand; Black: linker; Blue: RNase L ligand.)