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C-C Motif Chemokine 3 (CCL3), also known as Macrophage Inflammatory Protein-1 alpha (MIP-1a), contains 70 amino acids in its mature form. It is a factor produced by macrophages that causes local inflammatory responses in vivo, and induces superoxide production by neutrophils in vitro. CCL3 is involved in the acute inflammatory state and in the recruitment and activation of polymorphonuclear leukocytes. It binds to CCR1, CCR4, and CCR5. CCL3 is known mainly for its activity as a chemotactic cytokine, but may also have a potential role in host defense as a direct antiviral agent. CCL3 has been reported to show a significant direct antiviral activity against HSV-1. It is one of the major HIV-suppressive factors produced by CD8+ T-cells. CCL3 is also an inhibitor of haematopoietic stem cell proliferation.
AlphaLISA technology allows the detection of molecules of interest in a no-wash, highly sensitive, quantitative assay. In an AlphaLISA assay, a biotinylated anti-analyte antibody binds to the Streptavidin-coated Donor beads while another anti-analyte antibody is conjugated to AlphaLISA Acceptor beads. In the presence of the analyte, the beads come into close proximity. The excitation of the Donor beads causes the release of singlet oxygen molecules that triggers a cascade of energy transfer in the Acceptor beads, resulting in a sharp peak of light emission at 615 nm.
|Assay Target Class||Cytokine|
|Experimental Type||In vitro|
|Product Brand Name||AlphaLISA|
|Shipping Condition||Blue Ice|
|Unit Size||5,000 assay points|
The introduction of enzyme-linked immunosorbent assays (ELISAs) in the early 1970’s offered researchers a non-radiometric immunoassay platform without compromising sensitivity. Over the last 50 years scientists have made huge strides in disease research and drug discovery and a demand for greater assay throughput and sensitivity has evolved. In response, more robust immunoassays have been developed to address some of the limitations of the standard, colorimetric ELISA.
Find out about the most common limitations of traditional ELISAs and how different ELISA alternative technologies address these limitations.
The AlphaLISA® assay is a homogeneous immunoassay alternative to classical ELISA. AlphaLISA assays were originally utilized to detect analytesin cell cultures upernatants or serum/plasma samples.