Product Features

Product Name           Human CRP EasyTest™ ELISA Kit Assay Type                   Solid Phase Sandwich ELISA Format                           96-well strip plate Assay Process             One wash step, two incubations Assay Length              1.5 hours Sample Volume         Serum , Plasma, 50µL Detection Method    Colorimetric Sensitivity                   < 1 pg/mL Assay Range                15.6-1000 pg/mL Reactivity                     Human Cross-Reactivity       No cross-reactivity observed with available related molecules Gene Names               CRP, PTX1 Gene ID                         1401 Swissprot ID               P02741

Recovery

Linearity

Standard Curve: Human CRP EasyTest™ ELISA Kit

Kit Components

• Pre-Coated 96-well Strip Microplate • Wash Buffer • Stop Solution • Assay Diluent • Standards • Bioaim human CRP mix • TMB One-Step Substrate

Protocol Outline

1. Prepare all reagents, samples and standards as instructed in the manual. 2. Add 50 µl of standard or sample to each well. 3. Add 50 µl of  Bioaim mix. 4. Incubate 1 h at RT. 5. Wash and add 100 µl of TMB One-Step Substrate Reagent to each well. 6. Incubate 15 min at RT. 7. Add 50 µl of Stop Solution to each well. 8. Read at 450 nm/570 nm.

Background

C-reactive protein (CRP) is an annular (ring-shaped), pentameric protein found in blood plasma, whose levels rise in response to inflammation. It is an acute-phase protein of hepatic origin that increases following interleukin-6 secretion by macrophages and T cells. Its physiological role is to bind to lysophosphatidylcholine expressed on the surface of dead or dying cells in order to activate the complement system via the C1Q complex.

CRP is synthesized by the liver in response to factors released by macrophages and fat cells. It is a member of the pentraxin family of proteins. It is not related to C-peptide or protein C. C-reactive protein was the first pattern recognition receptor (PRR) to be identified. CRP binds to the phosphocholine expressed on the surface of dead or dying cells and some bacteria. This activates the complement system, promoting phagocytosis by macrophages, which clears necrotic and apoptotic cells and bacteria.

This acute phase response occurs as a result of a rise in the concentration of IL-6, which is produced by macrophages as well as adipocytes in response to a wide range of acute and chronic inflammatory conditions such as bacterial, viral, or fungal infections; rheumatic and other inflammatory diseases; malignancy; and tissue injury and necrosis. These conditions cause release of interleukin-6 and other cytokines that trigger the synthesis of CRP and fibrinogen by the liver.

Storage

The entire kit may be stored at -20°C for up to 1 year from the date of shipment. Avoid repeated freeze-thaw cycles. The kit may be stored at 4°C for up to 6 months. For extended storage, it is recommended to store at -80°C.

Regulatory Status      

Human CRP EasyTest™ ELISA Kit is for Research Use Only.