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A retraction has been published: N Engl J Med 2001;345(1):64.

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Volume 333:283-287 August 3, 1995 Number 5
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Reconstitution of Hematopoiesis after High-Dose Chemotherapy by Autologous Progenitor Cells Generated ex Vivo
Wolfram Brugger, M.D., Shelly Heimfeld, Ph.D., Ronald J. Berenson, M.D., Roland Mertelsmann, M.D., and Lothar Kanz, M.D.

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ABSTRACT

Background Autologous peripheral-blood progenitor cells can restore hematopoiesis after high-dose chemotherapy in patients with solid tumors or hematologic cancers. We investigated the ability of peripheral-blood progenitor cells generated ex vivo to restore hematopoiesis in patients with cancer who have undergone high-dose chemotherapy.

Methods Ten patients who had received high-dose chemotherapy were given transplants of autologous progenitor cells that had been generated ex vivo. We used 11 million CD34+ hematopoietic progenitor cells as the starting population for the cell growth. This number corresponds to less than 10 percent of the usual preparation of peripheral-blood CD34+ mononuclear cells used in leukapheresis. The CD34+ cells were grown in medium containing autologous plasma, recombinant human stem-cell factor, interleukin-1{beta}, interleukin-3, interleukin-6, and erythropoietin.

Results No toxic effects were observed with the infusion of the generated cells. The cells promoted a rapid and sustained hematopoietic recovery when transplanted after treatment with high-dose etoposide (1500 mg per square meter of body-surface area), ifosfamide (12 g per square meter), carboplatin (750 mg per square meter), and epirubicin (150 mg per square meter). The pattern of hematopoietic reconstitution was identical to that in historical controls treated with unseparated mononuclear cells or positively selected CD34+ cells.

Conclusions A small number of peripheral-blood CD34+ cells, when grown ex vivo, can supply a population of hematopoietic precursors that have the ability to restore blood formation in patients treated with high doses of chemotherapy. This method, which requires only a small volume of the patient's blood, may reduce the risk of tumor-cell contamination, circumvent the need for leukapheresis, and allow repeated cycles of high-dose chemotherapy.


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From the Albert-Ludwigs University Medical Center, Department of Hematology/Oncology, Freiburg, Germany (W.B., R.M., L.K.); and the CellPro Corporation, Bothell, Wash. (S.H., R.J.B.).

Address reprint requests to Dr. Kanz at the University Medical Center, Department of Hematology/Oncology, Otfried-Müller Str. 10, 72076 Tübingen, Germany.

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Related Letters:

Hematopoietic Reconstitution with Autologous Stem Cells
Juliusson G., Brugger W., Kanz L.
Extract | Full Text  
N Engl J Med 1996; 334:271-272, Jan 25, 1996. Correspondence

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