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RATIONALE: Studying samples of blood in the laboratory from patients receiving chemotherapy may help doctors learn more about the effects of chemotherapy on cells. It may also help doctors understand how patients respond to treatment.
- To measure levels of circulating tissue factor (TF) in patients with newly diagnosed multiple myeloma at several time points before, during, and after the administration of chemotherapy and/or antiangiogenic agents.
- To measure the correlation of TF with two markers of coagulation activation (i.e., D-dimer, thrombin-antithrombin [TAT] complexes) and two markers of endothelial activation (i.e., soluble E-selectin, soluble thrombomodulin) in these patients.
- To measure and compare (descriptively) our microparticle-associated TF procoagulant activity assay with two other assays using samples from these patients.
OUTLINE: Patients undergo blood sample collection at baseline and then periodically during treatment. Circulating tissue factor (TF) activity levels and coagulation and endothelial activation (by ELISA) are measured. Medical charts are reviewed for sociodemographic and medical information.
After completion of study, patients are followed up for 3 months.
Multiple Myeloma and Plasma Cell Neoplasm
enzyme-linked immunosorbent assay, laboratory biomarker analysis, medical chart review
Lineberger Comprehensive Cancer Center at University of North Carolina - Chapel Hill
National Cancer Institute (NCI)
Published on BioPortfolio: 2014-08-27T03:13:21-0400
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An immunoassay utilizing an antibody labeled with an enzyme marker such as horseradish peroxidase. While either the enzyme or the antibody is bound to an immunosorbent substrate, they both retain their biologic activity; the change in enzyme activity as a result of the enzyme-antibody-antigen reaction is proportional to the concentration of the antigen and can be measured spectrophotometrically or with the naked eye. Many variations of the method have been developed.
The assay of INTERFERON-GAMMA released from lymphocytes after their exposure to a specific test antigen, to check for IMMUNOLOGIC MEMORY resulting from a previous exposure to the antigen. The amount of interferon-gamma released is usually assayed by an ENZYME-LINKED IMMUNOSORBENT ASSAY.
A method of detection of the number of cells in a sample secreting a specific molecule. Wtih this method a population of cells are plated over top of the immunosorbent substrate that captures the secreted molecules.
Organized services provided by MEDICAL LABORATORY PERSONNEL for the purpose of carrying out CLINICAL LABORATORY TECHNIQUES used for the diagnosis, treatment, and prevention of disease.
A genotoxicological technique for measuring DNA damage in an individual cell using single-cell gel electrophoresis. Cell DNA fragments assume a "comet with tail" formation on electrophoresis and are detected with an image analysis system. Alkaline assay conditions facilitate sensitive detection of single-strand damage.
An assay is an analytic procedure for qualitatively assessing or quantitatively measuring the presence or amount or the functional activity of a target entity. This can be a drug or biochemical substance or a cell in an organism or organic sample. ...