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Catalog # HIT421

Lectin Complement Pathway, Mouse, Assay

The HIT421 measures lectin pathway activity mediated via MBL.

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The HIT421 measures lectin pathway activity mediated via MBL.

Complement deficiencies or other defects in the complement system can easily be screened by running an assay for each pathway in parallel or separately. The ELISA contains a positive control which can be used as process control to ensure that the lectin complement cascade has run completely. This positive control cannot be used to determine the level of activation between batches. We advise to include in your study your own reference sample for 100% complement activity and negative control (eg non-preserved activated serum) to determine the level of activation of your samples. Beware that complement activity levels are mouse strain dependent and might be affected by the way the samples are collected and processed.

The innate immune system is important in the first defense against foreign pathogens. A major component of this response is the complement system. The complement system consist of a complex family of proteins and receptors which are found in the circulation, in tissues and other body-fluids. Nowadays, also several links to the adaptive immunity are described. The system consist of three defined pathways which are activated by a pathway specific panel of molecules. Complement activation proceeds in a sequential fashion through the proteolytic cleavage of a series of proteins leading to the generation of activated products that mediate various biological activities through their interaction with specific cellular receptors and other serum proteins.

The three pathways, designated classical, lectin and alternative pathway, converge at a central component into a final common pathway. That is activation of C3 leading to formation of C3a and C3b. This cleavage activates the terminal complement pathway leading to eventually the formation of the terminal C5b-9 complement complex (TCC). The classical pathway is initiated by binding of C1q to antibody complexes, whereas the alternative and lectin pathway are activated in an antibody-independent fashion through the interaction of complement components with respectively specific carbohydrate groups and lipopolysaccharides (LPS) on the surface of foreign pathogens.

The alternative pathway also acts as an amplification loop of the other pathways. Under certain conditions, the complement system can be unfavorable to the host leading to e.g. autoimmune diseases and infections. Deficiency of C3 is e.g. associated with SLE. Alterations in the alternative pathway, like properdin or ficolin deficiency, increase the susceptibility to infection. Mannose binding lectin (MBL), a major component of the lectin pathway, is associated with bacterial, fungal and viral infection. A common way to measure the activity of the classical or alternative pathway is the hemolysis of erythrocytes. Furthermore some assays have been described to measure the activity of the MBL pathway. These assays are strenuous and not straightforward when it comes to the assay procedure.

The mouse lectin complement pathway ELISA is a qualitative/ semiquantitative ELISA to be used for the in vitro determination of activation of the lectin pathway of the complement system in serum samples.

The Mouse Lectin Complement Assay is a ready-to-use solid-phase enzyme-linked immunosorbent assay based on a sandwich principle with a working time of 4 hours. The efficient format of a plate with twelve disposable 8-well strips allows free choice of batch size for the assay. Samples and positive control are incubated in microtiter wells coated with mannan. Biotinylated tracer antibody will bind to the bound samples and control. Streptavidin-peroxidase conjugate will bind to the biotinylated tracer antibody. Streptavidin-peroxidase 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.

Product type
1 x 96 det.
Standard range
The assay contains a positive control which can be used as process control to ensure that the lectin complement cascade has run completely
Working volume
100 µl/well
Storage and stability
Product should be stored at 4 °C. Under recommended storage conditions, product is stable for at least six months.
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.
Infectious diseases, Nephrology
Safety Data Sheet Assay Manual
366 kb

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