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PURPOSE: Randomized phase I/II trial to study the effectiveness of peripheral stem cell transplantation in treating patients who have breast cancer or hematologic cancer.
- Determine the toxicity of ex vivo expanded megakaryocytes (EVE MK) as a supplement to peripheral blood stem cell (PBSC) transplantation in patients with breast cancer or hematologic malignancies.
- Compare the effect of this treatment regimen on platelet recovery and platelet function in these patients vs historical controls.
- Compare the frequency of malignant cells in the EVE MK vs the uncultured PBSC collection in these patients.
- Determine the optimal time of MK harvest for the production of platelets in vivo.
- Determine the required number of MKs for clinical efficacy in these patients.
OUTLINE: This is a randomized study. Patients are randomized to 1 of 2 durations of CD34+ culture times (6 days vs 9 days).
After an initial harvest of filgrastim (G-CSF)-mobilized autologous peripheral blood stem cells (PBSC) for transplantation, patients receive one additional dose of G-CSF and undergo one additional apheresis. The CD34+ cells are cultured in the presence of recombinant human thrombopoietin, interleukin-3, and flt3 ligand to expand megakaryocytes. Patients then undergo treatment with high-dose chemotherapy (and, in some cases, total body irradiation) followed by reinfusion of the conventional PBSC harvest and the ex vivo expanded megakaryocytes.
Patients are followed until blood counts recover.
PROJECTED ACCRUAL: A total of 24 patients will be accrued for this study.
Allocation: Randomized, Control: Active Control, Primary Purpose: Treatment
filgrastim, recombinant flt3 ligand, recombinant human thrombopoietin, recombinant interleukin-3, in vitro-treated peripheral blood stem cell transplantation
Robert H. Lurie Comprehensive Cancer Center, Northwestern University
Active, not recruiting
National Cancer Institute (NCI)
Published on BioPortfolio: 2014-08-27T03:57:25-0400
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The large scale production of pharmaceutically important and commercially valuable RECOMBINANT PROTEINS.
Techniques utilizing cells that express RECOMBINANT FUSION PROTEINS engineered to translocate through the CELL MEMBRANE and remain attached to the outside of the cell.
The in vitro fusion of GENES by RECOMBINANT DNA techniques to analyze protein behavior or GENE EXPRESSION REGULATION, or to merge protein functions for specific medical or industrial uses.
The GENETIC RECOMBINATION of the parts of two or more GENES resulting in a gene with different or additional regulatory regions, or a new chimeric gene product. ONCOGENE FUSION includes an ONCOGENE as at least one of the fusion partners and such gene fusions are often detected in neoplastic cells and are transcribed into ONCOGENE FUSION PROTEINS. ARTIFICIAL GENE FUSION is carried out in vitro by RECOMBINANT DNA technology.
Strains of mice in which certain GENES of their GENOMES have been disrupted, or "knocked-out". To produce knockouts, using RECOMBINANT DNA technology, the normal DNA sequence of the gene being studied is altered to prevent synthesis of a normal gene product. Cloned cells in which this DNA alteration is successful are then injected into mouse EMBRYOS to produce chimeric mice. The chimeric mice are then bred to yield a strain in which all the cells of the mouse contain the disrupted gene. Knockout mice are used as EXPERIMENTAL ANIMAL MODELS for diseases (DISEASE MODELS, ANIMAL) and to clarify the functions of the genes.
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