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Immunohistochemistry can be performed on tissue that has been fixed and embedded in paraffin, but also cryopreservated (frozen) tissue.Based on the way the tissue is preserved, there are different steps to prepare the tissue for immunohistochemistry, but the general method includes proper fixation, antigen retrieval incubation with primary antibody, then incubation with secondary antibody.
Immunohistochemistry with cytokeratin 5/6 antibodies in usual ductal hyperplasia, showing a mosaic pattern, predominantly in the central zone. Cytokeratin 5/6 antibodies are antibodies that target both cytokeratin 5 and cytokeratin 6. [1] These are used in immunohistochemistry, often called CK 5/6 staining, [2] including the following applications:
The immunohistochemistry (IHC) test is a laboratory method that detects antibodies of prions (mis-shapen proteins thought to transmit bovine spongiform encephalopathy, BSE or mad cow disease) by exposing a brain sample to a stain that appears as a specific color under a microscope.
Various target antibodies may be used in the IHC assessment of the ER. Typically, the antibody used is the anti-Estrogen Receptor (ER) (SP1) Rabbit Monoclonal Antibody. Employing SP1 allows detection of estrogen receptor (ER) antigens in sections of the fixed tissue samples. In conjunction with light microscopy, approximate ER activity can be ...
One of the main difficulties with IHC staining is overcoming specific or non-specific background. Optimisation of fixation methods and times, pre-treatment with blocking agents, incubating antibodies with high salt, and optimising post-antibody wash buffers and wash times are all important for obtaining high quality immunostaining.
For low and high protein overexpression/gene amplification, CISH and IHC show a concordance of over 86% and over 89%, respectively. [18] It has been shown that monoclonal antibodies are better than polyclonal antibodies for detection in both IHC and CISH as they bind more specifically, which leads to a higher concordance rate. [18]
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