Presence of visfatin/Nampt in synovial fluid. Synovial fluids were obtained from four osteoarthritis patients with joint effusion. Western blot analysis of visfatin/nicotinamide phosphoribosyltransferase (Nampt) protein level under nondenaturing conditions, showing polymeric conformation. Arrows show bands specific to visfatin/Nampt.
Laiguillon et al. Arthritis Research & Therapy 2014 16:R38 doi:10.1186/ar4467