- Created on the 12 March, 2017.
Interleukin-5 (IL-5) is also commonly referred to as eosinophil differentiation factor (EDF), it is a 135 amino acid polypeptide with a molecular mass of 12.5 kDa. Monomeric IL-5 has no activity and needs to form a homodimer in order for it to become active and function. One IL-5 homodimer has the ability to engage in binding to one IL-5 receptor and it has been implicated that the dimer undergoes a conformational change upon binding a receptor molecule and this change allows it to bind to a second receptor. The amino acid sequence of mature human and mouse are approx. 75% identical, however, the human IL-5 is marginally active on mouse cells whereas mouse IL-5 is highly active on human cells.
Interleukin 5 along with the chemokine eotaxin play a vital role in the coordination of the eosinophil-based inflammatory response. Even though there are many cells that contribute to inflammation, eosinophils are noted in particular because of their contribution to late phase allergic-type disorders. When they are activated within tissues, eosinophils are able to release highly basic preformed mediators (e.g. major basic protein and eosinophil peroxidase). These substances are highly toxic to parasites and can be quite damaging to the surrounding tissue functionality such as superoxide-mediated tissue destruction, vascular permeability and smooth muscle constriction. IL-5 appears to carry out a number of functions on eosinophils which can include down modulation of Mac-1, growth and differentiation, induction of granule release, upregulation of receptors for IgA or IgG and the stimulation of lipid mediator (PAF and leukotriene C4) secretion. Finally, IL-5 has been considered as a candidate gene in the pathogenesis of asthma, since it is the main cytokine controlling eosinophil activity, eosinophils have been identified as being pivotal in the development of airway inflammation.
Interleukin-5 ELISA kit can be used for in vitro quantitative analysis of interleukin-5 (IL-5) levels in human cell culture supernatant, serum, plasma (EDTA, heparin) and urine samples. This assay has a minimum detection limit of < 2.0 pg/ml.
The minimum detection sensitivity level of interleukin-5 (IL-5) using this human interleukin-5 ELISA kit was approximately 2.0 pg/ml. The dynamic assay range for this kit is 7.8 – 500 pg/ml.
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- Full Name: Interleukin-5 (IL-5) ELISA Kit
- Reactivity: Human
- Sample Type: Serum, Cell Culture Supernatant, Plasma (Heparin, EDTA), Urine
- Sensitivity: < 2.0 pg/ml