Two Different Methods of Collecting Stem Cells For an Autologous Stem Cell Transplant in Treating Patients With Diffuse Large Cell Lymphoma

2014-08-27 03:34:50 | BioPortfolio


RATIONALE: It is not yet known which method of stem cell collection is best for patients undergoing an autologous stem cell transplant.

PURPOSE: This randomized phase III trial is comparing two different methods of collecting stem cells in patients undergoing stem cell transplant for diffuse large cell lymphoma.




- Determine the therapeutic effect of instrument-driven lymphocyte enrichment of the autograft absolute lymphocyte count (A-ALC) compared to "standard autograft collection" as determined by progression-free survival post-transplantation.


- Determine the profile of immune effector cells of the "lymphocyte enriched autograft" vs "standard autograft" and peripheral blood after autologous stem cell transplant (ASCT) and their impact on post- ASCT immunological reconstitution and clinical endpoints.

- Perform quantitative and functional analysis of T, B, NK, and dendritic cells from the apheresis product and peripheral blood samples at multiple timepoints after transplantation.

- Determine and compare the proportion of patients who are progression-free and alive at 1 and 2 years.

- Determine the differences in overall survival between the two collection method arms.

- Evaluate and characterize differences in transplantation outcomes (e.g., time to ALC engraftment, incidence of infection, and the CD34 count) between the two collection method arms.

OUTLINE: Patients are stratified according to baseline International Prognostic Factor (≥ 2 factors vs < 2 factors) and PET scan findings prior to transplantation (positive vs negative). Patients receive filgrastim (G-CSF) alone or G-CSF and sargramostim (GM-CSF) daily for stem cell mobilization. Once the peripheral CD34-positive cell count reaches ≥ 10/μL, patients undergo stem cell collection. Patients are then randomized to 1 of 2 treatment arms for standard autologous stem cell transplantation (ASCT).

- Immunologic autograft engineering: Patients' stem cells are collected according to modified Amicus settings (i.e., MNC OFFSET = 0.0 and RBC = 7.0). Patients undergo ASCT IV on the day of apheresis (lymphocyte enriched autograft).

- Standard autograft collection: Patients' stem cells are collected according to standard Amicus settings (i.e., MNC OFFSET = 1.5 and RBC OFFSET = 5.0). Patients undergo ASCT IV on the day of apheresis.

Patients undergo blood sample collection periodically for immunological studies. Samples are analyzed for immunophenotyping of immune cell subsets via multicolor flow cytometry, immunoglobulin reconstitution, and functional T-cell immunity.

After completion of study treatment, patients are followed at day 15 post ASCT and then at 3, 6, 9, and 12 months.

Study Design

Allocation: Randomized, Masking: Double-Blind, Primary Purpose: Treatment




autologous hematopoietic stem cell transplantation, leukapheresis


Mayo Clinic Cancer Center
United States




National Cancer Institute (NCI)

Results (where available)

View Results


Published on BioPortfolio: 2014-08-27T03:34:50-0400

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Medical and Biotech [MESH] Definitions

Transfer of HEMATOPOIETIC STEM CELLS from BONE MARROW or BLOOD between individuals within the same species (TRANSPLANTATION, HOMOLOGOUS) or transfer within the same individual (TRANSPLANTATION, AUTOLOGOUS). Hematopoietic stem cell transplantation has been used as an alternative to BONE MARROW TRANSPLANTATION in the treatment of a variety of neoplasms.

The release of stem cells from the bone marrow into the peripheral blood circulation for the purpose of leukapheresis, prior to stem cell transplantation. Hematopoietic growth factors or chemotherapeutic agents often are used to stimulate the mobilization.

The transfer of STEM CELLS from one individual to another within the same species (TRANSPLANTATION, HOMOLOGOUS) or between species (XENOTRANSPLANTATION), or transfer within the same individual (TRANSPLANTATION, AUTOLOGOUS). The source and location of the stem cells determines their potency or pluripotency to differentiate into various cell types.

Transfer of MESENCHYMAL STEM CELLS between individuals within the same species (TRANSPLANTATION, HOMOLOGOUS) or transfer within the same individual (TRANSPLANTATION, AUTOLOGOUS).

The transference of BONE MARROW from one human or animal to another for a variety of purposes including HEMATOPOIETIC STEM CELL TRANSPLANTATION or MESENCHYMAL STEM CELL TRANSPLANTATION.

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