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RATIONALE: Studying samples of urine from patients with cancer in the laboratory may help doctors learn more about changes that occur in DNA and identify biomarkers related to cancer. It may also help doctors predict how patients will respond to treatment.
PURPOSE: This research study is looking at urine samples from women with newly diagnosed breast cancer.
- To learn the effects of selected agents (tamoxifen and aromatase inhibitors) on the profile of estrogen metabolites, glutathione conjugates, and depurinating DNA adducts in urine from women with breast cancer.
OUTLINE: Previously collected urine samples are analyzed for 40 estrogen metabolites, conjugates, and depurinating DNA adducts by ultra-performance liquid chromatography with tandem mass spectrometric detection.
Patient information (e.g., race, body mass index, age at menarche, menopausal status, age at menopause if applicable, smoking history, alcohol consumption) is collected through medical record review.
Observational Model: Cohort, Time Perspective: Prospective
high performance liquid chromatography, laboratory biomarker analysis, mass spectrometry, medical chart review
UNMC Eppley Cancer Center at the University of Nebraska Medical Center
University of Nebraska
Published on BioPortfolio: 2014-07-24T14:11:50-0400
RATIONALE: Studying samples of blood from patients with cancer in the laboratory may help doctors learn more about the affect of body mass index on the way anticancer drugs work in the bod...
RATIONALE: Studying samples of blood and urine from patients with cancer in the laboratory may help doctors identify biomarkers related to cancer. PURPOSE: This research study is looking ...
This phase II trial is studying how well decitabine works in treating patients with previously untreated acute myeloid leukemia. Drugs used in chemotherapy, such as decitabine, work in dif...
RATIONALE: Studying samples of blood from patients with cancer in the laboratory may help doctors learn more about nutrition-related changes that occur in DNA and identify biomarkers relat...
RATIONALE: Studying samples of tumor tissue from patients with cancer in the laboratory may help doctors learn more about changes that occur in DNA and identify biomarkers related to cance...
Qualitative and quantitative analysis of the saponins in leaves using ultra-performance liquid chromatography coupled with time-of-flight tandem mass spectrometry and high performance liquid chromatography coupled with UV detector.
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Simultaneous determination of cyclosporine and tacrolimus in human whole blood by ultra-high performance liquid chromatography tandem mass spectrometry and comparison with a chemiluminescence microparticle immunoassay.
Overestimation of immunoassays for cyclosporine (CsA) and tacrolimus (TAC) analysis in human whole blood is a problem. The liquid chromatography tandem mass spectrometry is recommended as a golden met...
Bavachinin (BVC), one of the main bioactive prenylated flavonoids derived from Psoralea corylifolia Linn, has a wide variety of pharmacological effects, such as antiangiogenic, antitumour, antiallergi...
Liquid chromatography tandem mass spectrometry (LC-MS/MS) assays are considered the reference standard for serum steroid hormone analyses, while full urinary steroid profiles are only achievable by ga...
A new method based on accelerated solvent extraction was developed for the extraction and determination of 11 organophosphorus flame retardants by using a high-performance liquid chromatography tandem...
Liquid chromatographic techniques which feature high inlet pressures, high sensitivity, and high speed.
A mass spectrometry technique using two (MS/MS) or more mass analyzers. With two in tandem, the precursor ions are mass-selected by a first mass analyzer, and focused into a collision region where they are then fragmented into product ions which are then characterized by a second mass analyzer. A variety of techniques are used to separate the compounds, ionize them, and introduce them to the first mass analyzer. For example, for in GC-MS/MS, GAS CHROMATOGRAPHY-MASS SPECTROMETRY is involved in separating relatively small compounds by GAS CHROMATOGRAPHY prior to injecting them into an ionization chamber for the mass selection.
A microanalytical technique combining mass spectrometry and gas chromatography for the qualitative as well as quantitative determinations of compounds.
Fractionation of a vaporized sample as a consequence of partition between a mobile gaseous phase and a stationary phase held in a column. Two types are gas-solid chromatography, where the fixed phase is a solid, and gas-liquid, in which the stationary phase is a nonvolatile liquid supported on an inert solid matrix.
A method of separation of two or more substances by repeated distribution between two immiscible liquid phases that move past each other in opposite directions. It is a form of liquid-liquid chromatography. (Stedman, 25th ed)
Benign Prostatic Hyperplasia (BPH) Erectile Dysfunction Urology Urology is the branch of medicine concerned with the urinary tract and diseases that affect it. Examples include urethritis, urethrostenosis and incontinence. Urology is a su...
Head and neck cancers
Cancer can occur in any of the tissues or organs in the head and neck. There are over 30 different places that cancer can develop in the head and neck area. Mouth cancers (oral cancers) - Mouth cancer can develop on the lip, the tongue, the floor...
DNA sequencing is the process of determining the precise order of nucleotides within a DNA molecule. During DNA sequencing, the bases of a small fragment of DNA are sequentially identified from signals emitted as each fragment is re-synthesized from a ...