nsc 145366

AB05831, also known as 2-Acetamido-1,2-dideoxynojirimycin, is a highly potent and specific inhibitor of beta-hexosaminidase. N-Acetyl-3-hexosaminidase (HEX) is a member of lysosomal hydrolases, which catalyzes hydrolysis of terminal, non-reducing N-acetyl-|3-D-glucosamine (GlcNAc) andN-acetyl-(3-D-galactosamine (GalNAc) residues in glycoproteins, gan-gliosides, and glycosaminoglycans (GAGs). HEX, released by chondrocytes into the extracellular compartment, promotes cartilage matrix degradation. Osteoarthritis patients have increased HEX activity in synovial fluid.

NSC145366 is an inhibitor of Hsp90 activities which targets the Hsp90 C-terminal domain to induce allosteric inhibition and selective client downregulation. NSC145366 increases Hsp90 oligomerization resulting in allosteric inhibition of NTD ATPase activity (IC50=119μM) but does not compete with NTD or CTD-ATP binding.