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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 
 
 

Development of new rabbit monoclonal antibody to estrogen receptor: immunohistochemical assessment on formalin-fixed, paraffin-embedded tissue sections.

Evaluation of estrogen and progesterone receptors in breast cancer is widely used for the prediction of the response to endocrine therapy and as a biologic parameter closely related to disease prognosis. Immunohistochemistry is considered a specific, sensitive, and economic method for the determination of estrogen receptor/ progesterone receptor status. The authors developed the first rabbit antiestrogen receptor monoclonal antibody (clone SP1) used in immunohistochemistry on formalin-fixed, paraffin-embedded tissue sections especially from breast carcinomas. This new antibody, compared with currently available antiestrogen receptor antibodies, has important advantages, including its reactivity even without heat-based antigen retrieval of fixed, embedded tissue sections in immunohistochemistry, and the predominance of nuclear immunostaining with only a very low cytoplasmic signal. A comparative study of immunohistochemistry on 61 histologic specimens from breast cancer cases showed that SP1 yields the same results as the well-known, standardized mouse monoclonal antibody to estrogen receptor (clone 1D5). Antibody affinity of SP1 is 8 times higher than that of 1D5. Thus, SP1 may prove of great value in the assessment of estrogen receptor status in human breast cancer.[1]

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