Principle of the Assay: This kit was based on standard sandwich enzyme-linked immune-sorbent assay technology. The purified anti-MMP-7 antibody was pre-coated onto 96-well plates. And the HRP conjugated anti-MMP-7 antibody was used as detection antibodies. The standards, test samples and HRP conjugated detection antibody were added to the wells subsequently, mixed and incubated, then, unbound conjugates were washed away with wash buffer. TMB substrates (A & B) were used to visualize HRP enzymatic reaction. TMB was catalyzed by HRP to produce a blue color product that changed into yellow after adding acidic stop solution. The density of yellow is proportional to the MMP-7 amount of sample captured in plate. Read the O.D. absorbance at 450nm in a microplate reader, and then the concentration of MMP-7 can be calculated!!Background/Introduction: Matrix metalloproteinase-7 (MMP-7) also known as Matrilysin is an enzyme that in humans is encoded by the MMP7 gene, which maps to 11q21-q22. It is a member of the MMP family, these proteins are involved in the breakdown of extracellular matrix in normal physiological processes, such as embryonic development, reproduction, and tissue remodeling, as well as in disease processes, such as arthritis and metastasis. This protein has 267 amino acids and is significantly shorter than stromelysin or collagenase, it was expressed in basal epithelial cells during the migration proliferation phase of corneal wound healing after excimer keratectomy. Crawford et al. (2002) hypothesized that MMP7 expression in preneoplastic pancreatic lesions applies apoptotic selective pressure to susceptible epithelial cells, resulting in selective expansion of a duct-like epithelium resistant to apoptotic stimuli.
NCBI and Uniprot Product Information
NCBI Description
The protein encoded by this gene is a pleiotropic cytokine produced by activated T cells. This cytokine is a ligand for interleukin 4 receptor. The interleukin 4 receptor also binds to IL13, which may contribute to many overlapping functions of this cytokine and IL13. STAT6, a signal transducer and activator of transcription, has been shown to play a central role in mediating the immune regulatory signal of this cytokine. This gene, IL3, IL5, IL13, and CSF2 form a cytokine gene cluster on chromosome 5q, with this gene particularly close to IL13. This gene, IL13 and IL5 are found to be regulated coordinately by several long-range regulatory elements in an over 120 kilobase range on the chromosome. Two alternatively spliced transcript variants of this gene encoding distinct isoforms have been reported. [provided by RefSeq, Jul 2008]
Uniprot Description
IL4: Participates in at least several B-cell activation processes as well as of other cell types. It is a costimulator of DNA-synthesis. It induces the expression of class II MHC molecules on resting B-cells. It enhances both secretion and cell surface expression of IgE and IgG1. It also regulates the expression of the low affinity Fc receptor for IgE (CD23) on both lymphocytes and monocytes. Genetic variations in IL4 may be a cause of susceptibility to ischemic stroke (ISCHSTR); also known as cerebrovascular accident or cerebral infarction. A stroke is an acute neurologic event leading to death of neural tissue of the brain and resulting in loss of motor, sensory and/or cognitive function. Ischemic strokes, resulting from vascular occlusion, is considered to be a highly complex disease consisting of a group of heterogeneous disorders with multiple genetic and environmental risk factors. Belongs to the IL-4/IL-13 family. 2 isoforms of the human protein are produced by alternative splicing.
Protein type: Secreted; Cell cycle regulation; Cytokine; Secreted, signal peptide; Motility/polarity/chemotaxis
Chromosomal Location of Human Ortholog: 5q31.1
Cellular Component: extracellular space; external side of plasma membrane
Molecular Function: protein binding; growth factor activity; cytokine activity; interleukin-4 receptor binding
Biological Process: regulation of isotype switching; negative regulation of osteoclast differentiation; positive regulation of isotype switching to IgG isotypes; positive regulation of transcription, DNA-dependent; microglial cell activation; regulation of proton transport; female pregnancy; positive regulation of activated T cell proliferation; chemotaxis; response to organic cyclic substance; positive regulation of interleukin-10 production; positive regulation of isotype switching to IgE isotypes; B cell costimulation; positive regulation of MHC class II biosynthetic process; connective tissue growth factor biosynthetic process; positive regulation of B cell proliferation; positive regulation of T cell proliferation; positive regulation of interleukin-13 production; negative regulation of macrophage activation; response to nutrient; response to drug; cholesterol metabolic process; negative regulation of chronic inflammatory response; regulation of immune response; T-helper 2 type immune response; regulation of phosphorylation; B cell activation; negative regulation of nitric oxide biosynthetic process; negative regulation of acute inflammatory response; defense response to protozoan; T-helper 1 cell lineage commitment; positive regulation of chemokine biosynthetic process; response to ethanol; innate immune response in mucosa; positive regulation of T cell differentiation; positive regulation of tyrosine phosphorylation of Stat5 protein; retina development in camera-type eye; B cell differentiation; response to cytokine stimulus; cellular defense response; positive regulation of transcription factor activity; positive regulation of transcription from RNA polymerase II promoter; immune response; T-helper 2 cell differentiation; positive regulation of defense response to virus by host; negative regulation of transcription, DNA-dependent; negative regulation of apoptosis
Disease: Stroke, Ischemic
Research Articles on IL-4
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Product Notes
The IL-4 il4 (Catalog #AAA494785) is an ELISA Kit and is intended for research purposes only. The product is available for immediate purchase. It is sometimes possible for the material contained within the vial of "IL-4, ELISA Kit" to become dispersed throughout the inside of the vial, particularly around the seal of said vial, during shipment and storage. We always suggest centrifuging these vials to consolidate all of the liquid away from the lid and to the bottom of the vial prior to opening. Please be advised that certain products may require dry ice for shipping and that, if this is the case, an additional dry ice fee may also be required.Precautions
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