FK866 (APO866),658084-64-1,IC-0238892

FK866 (APO866) is an inhibitor of nicotinamide phosphoribosyltransferase (NMPRTase). FK866 (APO866) protects against experimental colitis and colitis?associated tumorigenesis by suppression of activated leukocytes particularly macrophages, inflammatory monocytes and T cells. FK866(APO866) also reduced inflammatory responses of lamina propria mononuclear cells (LPMNC) from colonic biopsies of patients with IBD to a comparable extent as dexamethasone [1].
The IC50 of FK866 (APO866) on NAMPT activity is 1.60±0.32 nmol/L [2].. IC50 of FK866 (APO866) on HepG2 cells is 2.21±0.21 nmol/L. FK866 (APO866) treatment strongly reduced NF-κB phosphorylation consequent to LPS treatment. Inhibition of NAMPT by FK866, or inhibition of SIRT by nicotinamide decreased proliferation and triggered death of 293T cells involving the p53 acetylation pathway [3].. FK866 (APO866) potently inhibited NAMPT activity as demonstrated by reduced mucosal NAD, resulting in reduced abundances and activities of NAD-dependent enzymes including PARP1, Sirt6 and CD38, reduced nuclear factor kappa B activation, and decreased cellular infiltration by inflammatory monocytes, macrophages and activated T cells [1].
FK866 (APO866) significantly ameliorated all features of DSS-induced colitis in Rag1?/? mice and effectively suppresses inflammatory innate immune responses in the absence of adaptive immunity. FK866 (APO866) significantly reduced chemokine and cytokine release, many of those which are macrophage/monocyte derived. Remarkably, the observed suppression was in the range or even superior to well-established anti-inflammatory compounds such as dexamethasone and infliximab [1].