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ER-positive is one of the Receptor statuses identified in the classification of breast cancer.Receptor status was traditionally considered by reviewing each individual receptor (ER, PR, her2) in turn, but newer approaches look at these together, along with the tumor grade, to categorize breast cancer into several conceptual molecular classes [1] that have different prognoses [2] and may have ...
There are two different forms of the estrogen receptor, usually referred to as α and β, each encoded by a separate gene (ESR1 and ESR2, respectively).Hormone-activated estrogen receptors form dimers, and, since the two forms are coexpressed in many cell types, the receptors may form ERα (αα) or ERβ (ββ) homodimers or ERαβ (αβ) heterodimers. [3]
Additionally, cancers can be ER-/PR+ or ER+/PR-, but these are unnamed and relatively rare. [7] The receptor status of a cancer is assessed for all breast cancers as it has important implications on prognosis of the patient. It also dictates the treatment given: cancers that do express ER are likely to respond to endocrine therapy, but this ...
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 estimated using the level of staining of the cell's components.
Estrogen receptor positive (ER+) cancer cells depend on estrogen for their growth, so they can be treated with drugs to reduce either the effect of estrogen (e.g. tamoxifen) or the actual level of estrogen (e.g. aromatase inhibitors), and generally have a better prognosis.
Palazestrant is an investigational new drug which is being evaluated for the treatment of estrogen receptor-positive (ER+) breast cancer, with a dual mechanism of action as both a complete estrogen receptor antagonist (CERAN) and a selective estrogen receptor degrader (SERD). This orally bioavailable small molecule has demonstrated potent ...
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