By Giampietro Gasparini
Professional laboratory and medical researchers from around the globe assessment the way to layout and evaluation experiences of tumor markers and think about their use in breast melanoma sufferers. The authors hide either the most important advances in refined molecular tools and the state of the art in traditional prognostic and predictive signs. one of the issues mentioned are the relevance of rigorous examine layout and directions for the validation stories of latest biomarkers, gene expression profiling through tissue microarrays, adjuvant systemic treatment, and using estrogen, progesterone, and epidermal progress issue receptors as either prognostic and predictive symptoms. Highlights comprise the assessment of HER2 and EGFR relatives, of p53, and of UPA/PAI-1; the detection of infrequent cells in blood and marrow; and the detection and research of soluble, circulating markers.
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Additional info for Biomarkers in Breast Cancer (Cancer Drug Discovery and Development)
SENSITIVITY In epidemiological terms, sensitivity refers to the proportion of truepositive test results of a diseased population. Analytically, sensitivity may be defined as the limit of detection of the analyte in the assay, that is, the lowest concentration of analyte significantly different from zero, also called the analytical sensitivity. The limit of quantification at which a test can be reliably measured with a coefficient of variation of less than 20% is called the functional sensitivity.
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The next sections deal with reliability criteria of analytic testing systems. 1. STANDARD CALIBRATION PREPARATIONS Standards are used to prepare a standard dose response curve that relates the response reading as the independent variable to the quantity of the standard as the dependent variable. This allows calculation of the quantity of analyte from the response reading obtained for the unknown sample. It is not always possible to obtain sufficient quantities of a reasonably pure biomarker for characterization, which is the reason why in many cases arbitrary nonpurified or semipurified preparations of biomarkers are used to produce standard curves.