Elastase, Human, ELISA kit

Catalog #: HK319-02
Quantity: 2 x 96 det.
$1,056.00

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Description
Details
Neutrophil elastase, a major serine proteinase in man, is predominantly present in the azurophilic granules of neutrophils. Elastase has a broad range of extracellular matrix substrates including elastin, proteoglycans, collagen and fibronectin. The action of elastase is controlled by serine proteinase inhibitors. Elastase, when released during inflammation, is rapidly bound by its two main inhibitors, alpha1-PI and alpha2-macroglobuline to form elastase-inhibitor complexes. In addition, mucosa secretions may contain the locally secreted elastase inhibitors elafin/SKALP and SLPI. When secreted at sites of inflammation elastase can cause severe tissue damage. An important role has been suggested for elastase in various inflammatory disorders, including pulmonary emphysema, sepsis, arthritis, nephritis and certain skin diseases. Elastase induces the production of IL-8 in human bronchial epithelial, a proces that occurs in part through TLR4. In plasma of healthy individuals approx. 55 ng/ml (29 - 86 ng/ml) elastase is present.
Specifications

Specifications

Catalog number HK319-02
Product type Assays
Quantity 2 x 96 det.
Standard range 0.4-25 ng/ml
Detection level 0.4 ng/ml
Working volume 100 µl/well
Species Human
Storage and stability Product should be stored at 4 °C. Under recommended storage conditions, product is stable for one year.
Precautions For research use only. Not for use in or on humans or animals or for diagnostics. It is the responsibility of the user to comply with all local/state and Federal rules in the use of this product. Hycult Biotech is not responsible for any patent infringements that might result with the use of or derivation of this product.
Disease Autoimmunity, Pulmonology
Application
Applications
  • Application:
    The human Elastase ELISA kit is to be used for the in vitro quantitative determination of human Elastase in plasma and cell culture supernatant samples.
  • Principle:
    The human neutrophil Elastase ELISA is a ready-to-use solid-phase enzyme-linked immunosorbent assay based on the sandwich principle with a working time of 3½ hours. The efficient format of a plate with twelve disposable 8-well strips allows free choice of batch size for the assay. Samples and standards are captured by a solid bound specific antibody. Biotinylated tracer antibody will bind to captured human neutrophil elastase. Streptavidin-peroxidase conjugate will bind to the biotinylated tracer antibody. Streptavidin-peroxidase conjugate will react with the substrate, tetramethylbenzidine (TMB). The enzyme reaction is stopped by the addition of oxalic acid. The absorbance at 450 nm is measured with a spectrophotometer. A standard curve is obtained by plotting the absorbance (linear) versus the corresponding concentrations of the human neutrophil elastase standards (log). The human neutrophil elastase concentration of samples, which are run concurrently with the standards, can be determined from the standard curve.
Performance
Performance
Linearity:
The linearity of the assay was determined by serially diluting a sample containing 18 ng/ml human neutrophil elastase. The diluted samples were measured in the assay. The line obtained a slope of 1.35 and a correlation coefficient of 0.999.
References
References
References:
1. Dentener, M et al; Bacterial/permiability-increasing protein release in whole blood ex vivo: strong induction by lipopolysaccharide and tumor necrosis factor-alpha. J Infect Dis 1996, 175: 108
2. Hiltermann, J et al; Ozone-induced inflammation assessed in sputum and bronchial lavage fluid from asthmatics: a new noninvasive tool in epidemiologic studies on air pollution and asthma. Free Radic Biol Med 1999, 27: 1448
3. Prassouli, A et al; Low levels of serum neutrophil Elastase inversely correlate with serum α1-antitrypsin in patients with chronic idiopathic neutropenia. Haema 2003, 6: 352
4. Papadaki, H et al; Low levels of serum Elastase are not associated with mutations in ELA-2 Elastase encoding gene in chronic idiopathic neutropenia. Blood 2003, 101: 2898
5. Köllner, I et al; Mutations in neutrophil Elastase causing congenital neutropenia lead to cytoplasmic protein accumulation and induction of the unfolded protein response. Blood 2006, 108: 493
6. Kodama, T et al; Neutrophil Elastase as a predicting factor for development of acute lung injury.Internal medicine 2007, 46: 699
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