- Created on the 5 April, 2017.
Granzyme B is found in granules of cytotoxic lymphocytes, cytotoxic T cells and natural killer cells, these are all serine protease which are secreted along with pore forming proteins (called perforin) in order to mediate the process of apoptosis in target cells. It is through the transmembrane pores the granzymes are able to enter the cytosol of the target cell, upon entering they are able to activate the intracellular cascade of many caspases which ultimately leads to the eventual killing of the target cells.
Granzyme B has also been found to be involved in a number of other secondary functions which include inducing inflammation and extracellular matrix remodelling. There are recent evidence that it can be produced by a number of non-cytotoxic cells for example mast cells, smooth muscle cells and basophils cells. Elevated levels of granzyme B have been implicated in many autoimmune diseases, type 1 diabetes and in several skin diseases. There is evidence that granzyme B has a potential of more than 300 substrates, it also has the ability to cleave Mcl-1 that can be found within the outer mitochondrial membrane and this can lead to relieving its inhibition of Bim. Bim has been identified in stimulating apoptosis, mitochondrial membrane permeability and BAX/BAK oligomerisation. It can also cleave Hs-1 associated protein X-1 (HAX1) in order to facilitate mitochondria polarisation. Detectable amounts of soluble granzymes can be measured using ELISA assay procedures.
Human granzyme B ELISA kit is a protocol that is intended to measure in vitro quantitative levels of granzyme B (Gzm-b) in human serum, cell culture supernatant, cell lysates, other biological fluids, plasma and tissue homogenates. This assay has a minimum sensitivity limit of < 0.51 ng/ml.
Minimum detection limits of a granzyme B (Gzm-b) using this human granzyme B ELISA kit was 0.51 ng/ml. The dynamic assay range for this kit is 1.0 – 300.0 ng/ml.
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- Full Name: Granzyme B (Gzm-B) ELISA Kit
- Reactivity: Human
- Sample Type: Serum, Cell Culture Supernatant, Plasma, Other Biological Fluids, Cell Lysates, Tissue Homogenates
- Sensitivity: < 0.51 ng/ml