Clinical Trial: Studying Blood Samples From Patients With Multiple Myeloma Who Were Treated With Thalidomide or Lenalidomide

Study Status: Completed
Recruit Status: Completed
Study Type: Observational

Official Title: Screening of Cathepsin G Levels in Multiple Myeloma Patients Receiving Treatment With Thalidomide/Lenalidomide Within the ECOG Trials E1A00 and E4A03

Brief Summary:

RATIONALE: Studying samples of blood 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 blood samples from patients with multiple myeloma who were treated with thalidomide or lenalidomide.


Detailed Summary:

OBJECTIVES:

Primary

  • To analyze the mechanism of development of thalidomide/lenalidomide-induced venous thromboembolism (VTE) in patients with multiple myeloma treated on clinical trial ECOG-E4A03 or E-E1A00.
  • To determine the intensity, dynamics, and specificity of cathepsin G (CG) upregulation in response to thalidomide and lenalidomide treatment.
  • To determine the specificity and threshold levels of CG for induction of platelet aggregation in response to thalidomide and lenalidomide and the resulting risk for VTE development.

OUTLINE: Blood samples obtained before, during, and after treatment with thalidomide or lenalidomide from patients previously enrolled on clinical trial ECOG-E4A03 or E-E1A00 are analyzed to determine the total content of cathepsin G (CG) via ELISA; to determine mRNA levels of CG via RT-PCR; and for platelet aggregation studies. Blood samples are collected from healthy volunteers for platelet preparation.


Sponsor: Eastern Cooperative Oncology Group

Current Primary Outcome: Proportion of patients with failed disease based on expectations for changes in cathepsin G (CG) levels [ Time Frame: 1 month ]

Original Primary Outcome: Proportion of patients with failed disease based on expectations for changes in cathepsin G (CG) levels

Current Secondary Outcome:

  • Mechanism of development of thalidomide/lenalidomide-induced venous thromboembolism (VTE) [ Time Frame: 1 month ]
  • Intensity, dynamics, and specificity of CG upregulation in response to thalidomide and lenalidomide treatment [ Time Frame: 1 month ]
  • Specificity and threshold levels of CG for induction of platelet aggregation in response to thalidomide and lenalidomide and the resulting risk for VTE development [ Time Frame: 1 month ]


Original Secondary Outcome:

  • Mechanism of development of thalidomide/lenalidomide-induced venous thromboembolism (VTE)
  • Intensity, dynamics, and specificity of CG upregulation in response to thalidomide and lenalidomide treatment
  • Specificity and threshold levels of CG for induction of platelet aggregation in response to thalidomide and lenalidomide and the resulting risk for VTE development


Information By: Eastern Cooperative Oncology Group

Dates:
Date Received: May 9, 2009
Date Started: July 4, 2008
Date Completion:
Last Updated: May 16, 2017
Last Verified: May 2017