Human Visfatin Competitive ELISA Kit

Visfatin / PBEF1

-20°C

Plasma, Serum

Colorimetric

96-well Microplate

Pre-Coated 96-well Strip Microplate
Wash Buffer
Standard Peptide
Assay Diluent(s)
Biotinylated Peptide
HRP-Streptavidin
TMB One-Step Substrate
Stop Solution
Assay Diagram
Positive Control Sample
Capture Antibody
User Manual

Prepare all reagents, samples and standards as instructed.
Add 100 µl detection antibody to each well.
Incubate 1.5 h at RT or O/N at 4°C.
Add 100 µl standard or sample to each well.
Incubate 2.5 h at RT.
Add 100 µl prepared streptavidin solution.
Incubate 45 min at RT.
Add 100 µl TMB One-Step Substrate Reagent to each well.
Incubate 30 min at RT.
Add 50 µl Stop Solution to each well.
Read plate at 450 nm immediately.

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Cross Reactivity: This EIA kit shows no cross-reactivity with any of the cytokines tested: Ghrelin, Nesfatin, NPY and APC.

Obesity, which is characterized by excessive accumulation of adipose tissue in the body, has become one of the greatest public health challenges. Obesity is not only associated with health problems linked to increased weight-dependent pressure overload on lung, joints and bones, but also a important risk factor for life-threatening diseases such as cardiovascular diseases, type 2 diabetes and certain cancers. Visfatin, an adipokine that is highly enriched in the visceral fat, has increased expression level in plasma during the development of obesity, implying its important role in obesity.Visfatin (also known as PBEF and Nampt), a 52 kDa cytoplasmic protein composed of 473-amino acids, is expressed primarily in bone marrow, muscle and liver tissue but can also be detected in placenta, lung, kidney and heart tissue. In addition to its role in obesity, visfatin also has other biological functions. Visfatin is a nicotinamide phosphoribosyltransferase (Nampt) enzyme that catalyzes first step in the biosynthesis of NAD from nicotinamide. Visfatin has also been reported to be a cytokine (PBEF) that promotes B cell maturation and inhibits neutrophil apoptosis.