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Visfatin (NAMPT, Pre-B cell colony-enhancing factor, PBEF, Nicotinamide phosphoribosyltransferase, NAmPRTase, EC=2.4.2.12, Pre-B-cell colony-enhancing factor 1, PBEF1, NAMPT)

Excess adiposity is the most important risk in the development of insulin resistance and type 2 diabetes mellitus (T2DM). Adipose tissue produces several proteins (adipocytokines) such as leptin, adiponectin, resistin, tumor necrosis factor-α, and IL-6, that modulate insulin sensitivity and appear to play an important role in the pathogenesis of insulin resistance, diabetes, dyslipidemia, inflammation, and atherosclerosis. However, the mechanisms by which fat tissue induces insulin resistance and the role of adipocytokines in the pathogenesis of T2DM have not been well established. Visfatin, also known as pre-B cell colony-enhancing factor (PBEF), is a cytokine that is highly expressed in visceral fat and was originally isolated as a secreted factor that synergizes with IL-7 and stem cell factors to promote the growth of B cell precursors. Visfatin homologs have been identified in carp, invertebrate mollusks , and bacteria, as well as in vertebrates, including humans and the mouse. It has been postulated to play a role in innate immunity. Visfatin exerts insulin-mimetic effects that are dose-dependent and quantitatively similar to those of insulin in stimulating muscle and adipocyte glucose transport, and in inhibiting hepatocyte glucose production. Intravenous injection of recombinant visfatin in mice decreased plasma glucose in a dose-dependent fashion. In keeping with its insulin-mimetic effects, visfatin was as effective as insulin in reducing hyperglycemia in insulin-deficient diabetic mice. Visfatin was also found to be bound to and activate insulin receptor, causing receptor phosphorylation and the activation of downstream signaling molecules. However, visfatin and insulin did not compete for binding to the insulin receptor, indicating that the two proteins were recognized by different regions of the receptor. Thus, visfatin might play a role in glucose homeostasis and dysregulation in biosynthesis or signal transduction, and might contribute to the pathogenesis of diabetes.

4 results found in Immunoassays
1 result found in Proteins

Immunoassays
Product Size Price
Visfatin (NAMPT) Human (IntraCellular) ELISA

Type: Sandwich ELISA, HRP-labelled antibody

RAG008R 96 wells (1 kit)
 
Visfatin (NAMPT) Human ELISA

Type: Sandwich ELISA, HRP-labelled antibody

RAG004R 96 wells (1 kit)
 
Visfatin (NAMPT) Mouse/Rat (IntraCellular) ELISA

Type: Sandwich ELISA, HRP-labelled antibody

RAG010R 96 wells (1 kit)
 
Visfatin (NAMPT) Mouse/Rat ELISA

Type: Sandwich ELISA, HRP-labelled antibody

RAG009R 96 wells (1 kit)
 
Proteins
Product Size Price
Visfatin Human E. coli

Type: Recombinant

RD172098100 0.1 mg