Description: The human sP-selectin ELISA is an enzyme-linked immunosorbent assay for the quantitative detection of human sP-selectin.
P-selectin belongs to the selectin family of adhesion molecules. P-selectin acts as a receptor that supports binding of leukocytes to activated platelets and endothelium.
P-selectin is a 140 kDa protein that is highly glycosylated. The cDNA derived amino acid sequence predicts a molecule with a series of cysteine-rich domains.
P-selectin is located in membranes of a granules in unstimulated platelets and redistributed to the cell surface upon platelet activation. P-selectin is also present in endothelial cells in membranes of Weibel-Palade bodies and megakaryocytes.
The physiologic role of P-selectin might be the mediation of initial leukocyte adhesion to activated endothelium during acute inflammation. It may work in concert with E-selectin to direct early, regionally specific adherence of neutrophils and monocytes at sites of acute inflammation. A soluble form of P-selectin found in serum and plasma has been described which might represent a proteolytic fragment or more likely a soluble splice variant lacking the transmembrane domain.
Excessive accumulation of neutrophils on the endothelial surface accompanied by high exposure of P-selectin has been implicated in a number of inflammatory disorders, including adult respiratory distress syndrome, acute lung injury, ischemia-reperfusion injury, Gram-negative septic shock, thrombotic diseases and rheumatoid arthritis. Malignant cells were shown to express receptors for P-selectin suggesting an important role for P-selectin in tumor formation and metastasis.
Components
Aluminium pouch(es) with a Microwell Plate coated with monoclonal antibody to human sP-selectin
HRP-Conjugate anti-human sP-selectin monoclonal antibody
Human sP-selectin Standard lyophilized, 80 ng/mL upon reconstitution
Control high, lyophilized
Control low, lyophilized
Sample Diluent
Assay Buffer Concentrate 20x (PBS with 1% Tween 20 and 10% BSA)
Wash Buffer Concentrate 20x (PBS with 1% Tween 20)
Substrate Solution (tetramethyl-benzidine)
Stop Solution (1M Phosphoric acid)
Blue-Dye
Green-Dye
Adhesive Films