3.5 hours incubations; 1 hour washing and analyzing samples
Signal
Colorimetric
Curve Range
15.6pg/ml-1000pg/ml
Sample Type
Human serum, plasma and other biological fluids.
Sample Volume
100µl
Specificity
This kit is used for quantitative detection of Human PSP/REG1A
Sensitivity
5.3pg/ml
Reactivity
Human
Cross Reactivity
There is no detectable cross-reactivity with other relevant proteins.
Interference
No significant interference observed with available related molecules.
Components
PSP/REG1A Antibody Coated 96-well Plate in foil pouch with desiccant | 1 plate
Recombinant Human PSP/REG1A Standard (50ng/ml) | 0.1 mL
100x Biotinylated Human PSP/REG1A Detection Antibody | 0.12 mL
100x Peroxidase Conjugate | 0.12 mL
Assay Buffer | 30 mL
Sample Diluent | 15 mL
Wash Buffer Concentrate 20X | 60 mL
TMB Substrate | 12 mL
Stop Solution | 12 mL
Background
Pancreatic stone protein (PSP), also known as lithostathine, and regenerating protein (REG1A). It is a secreted, type I subclass member of the regenerating protein family. Mature human PSP/REG1A shares 76% and 69% aa sequence identity with mouse and rat PSP/REG1A, respectively. PSP/REG1A is constitutively expressed by pancreatic acinar cells, and is also induced in proliferating cell types such as colonic epithelium, islet beta-cells, and multiple tumor types. The 16 kDa precursor of PSP/REG1A has been observed mainly in the pancreas and is transiently elevated in acute and chronic pancreatitis. PSP/REG1A has been found both in blood and pancreatic secretions.
PSP/REG1A plays a role in blocking apoptosis, and is upregulated by both IL-22 and IL-6. Under healthy conditions PSP/REG1A is expressed at low levels in the pancreas. Upon focal or systemic inflammation, PSP/REG1A is strongly increased. PSP/REG1A is elevated in various conditions such as sepsis, ventilator associated pneumonia (VAP), chronic obstructive pulmonary disease (COPD) exacerbation, and type 1 diabetes mellitus (T1DM) and type 2 diabetes mellitus (T2DM). These observations indicated that PSP/REG1A might respond to infectious conditions and organ failure. The use of the PSP/REG1A as a biomarker has been confirmed the high diagnostic accuracy for sepsis. In addition, evidences obtained regarding PSP/REG1A and its isoforms on regeneration, growth and mitogenesis in gastrointestinal neoplastic diseases suggest that PSP/REG1A can be used as biomarker in the prediction of prognosis for neoplastic diseases.
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