Nicotinamide phosphoribosyltransferase, NAMPT, NAPRTase family, nicotinamide, 5-phosphoribosyl-1-pyrophosphate, nicotinamide mononucleotide, NAD, bone marrow, liver tissue, muscle tissue, neutrophil, apoptosis, sepsis, energy metabolism, NAD, pyridine nucleotide synthesis, and cell cycle