Study of Previously Collected and Stored Tissue Samples From Patients Previously Enrolled in a Completed National Cancer Institute Clinical Trial
RATIONALE: Studying samples of tissue from patients with cancer in the laboratory may help doctors learn more about changes that occur in DNA and identify biomarkers related to cancer.
PURPOSE: This laboratory study is looking at previously collected and stored tissue samples from patients previously enrolled in a completed National Cancer Institute clinical trial.
Genetic: gene expression analysis
Genetic: microarray analysis
Genetic: mutation analysis
Genetic: polymerase chain reaction
Other: flow cytometry
Other: immunoenzyme technique
Other: laboratory biomarker analysis
|Official Title:||Request to Conduct Research for Same Use of Stored Human Samples, Specimens, or Data Collected in a Terminated NCI-IRB Protocol|
- Analyses of stored human samples, specimens, and data collected from patients previously enrolled in a terminated National Cancer Institute-Institutional Review Board clinical trial
- Correlation of plasma levels and pharmacokinetics with disease burden and presence of antibodies
- Correlation of tumor markers with disease burden
- Utility of tumor markers for following patients after treatment
|Study Start Date:||October 2007|
|Study Completion Date:||October 2007|
|Primary Completion Date:||October 2007 (Final data collection date for primary outcome measure)|
- Conduct research for same use of stored human samples, specimens, and data collected from patients previously enrolled in a terminated National Cancer Institute-Institutional Review Board clinical trial.
- Correlate plasma levels and pharmacokinetics with disease burden and presence of antibodies.
- Correlate tumor markers with disease burden.
- Determine the utility of tumor markers for following patients after treatment.
OUTLINE: Stored human samples, specimens, and data collected from patients previously enrolled in a terminated National Cancer Institute-Institutional Review Board clinical trial are analyzed for research studies*. Antibodies are neutralized to allow for correlation of ELISA assays for immunogenicity with neutralization assays, which require cytotoxicity assays. In cytotoxicity assays, fresh malignant cells are isolated from blood, bone marrow, lymph nodes, or other tissues and incubated with recombinant immunotoxins to determine their sensitivity. Soluble CD25 assays are used to analyze known marker for B-cell malignancies, particularly those that are CD25-positive. Other candidate tumor markers include soluble IRTA2, soluble CD22, and soluble mesothelin. Skin biopsies retained by the Clinical Pathology Lab are used to study capillary leak syndrome. Other research studies include HLA typing to correlate immunological parameters with response and the PAX-gene tube to obtain RNA for quantitative PCR, evaluate monoclonal immunoglobulin expression, study minimal residual disease, and characterize immunoglobulin gene usage and somatic mutation. RNA microarrays are used to study resistance to immunotoxins. Samples of blood are used to study mechanisms of hemolytic uremic syndrome (HUS) from anti-CD22 immunotoxins. DNA samples are analyzed for complement and/or Factor H mutations that would make a patient more susceptible to HUS. Samples are also analyzed for levels of immunotoxin in blood, urine, and other tissues and for quantification of tumor markers on malignant cells using flow cytometry assays.
NOTE: *Assays that have significant risk to the patient or to the patient's family, including genetic cancer susceptibility studies, will not be performed.
Please refer to this study by its ClinicalTrials.gov identifier: NCT00904514
|Principal Investigator:||Robert Kreitman, MD||National Cancer Institute (NCI)|