Volume 96, Issue 1 pp. 27-35
Original Article

OCTET-CY: a phase II study to investigate the efficacy of post-transplant cyclophosphamide as sole graft-versus-host prophylaxis after allogeneic peripheral blood stem cell transplantation

Udo Holtick

Corresponding Author

Udo Holtick

Stem Cell Transplantation Program, Department I of Internal Medicine, Center for Integrated Oncology CIO KölnBonn, University Hospital of Cologne, Cologne, Germany

Cologne Interventional Immunology, Department I of Internal Medicine, University Hospital of Cologne, Cologne, Germany

Correspondence Udo Holtick, MD, PhD, Cologne Interventional Immunology & Stem Cell Transplantation Program, Department of I of Internal Medicine, University of Cologne, Cologne, Germany. Tel: +49 221 478 4407; Fax: +49 221 478 7170; e-mail: [email protected]Search for more papers by this author
Jens-Markus Chemnitz

Jens-Markus Chemnitz

Stem Cell Transplantation Program, Department I of Internal Medicine, Center for Integrated Oncology CIO KölnBonn, University Hospital of Cologne, Cologne, Germany

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Alexander Shimabukuro-Vornhagen

Alexander Shimabukuro-Vornhagen

Stem Cell Transplantation Program, Department I of Internal Medicine, Center for Integrated Oncology CIO KölnBonn, University Hospital of Cologne, Cologne, Germany

Cologne Interventional Immunology, Department I of Internal Medicine, University Hospital of Cologne, Cologne, Germany

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Sebastian Theurich

Sebastian Theurich

Stem Cell Transplantation Program, Department I of Internal Medicine, Center for Integrated Oncology CIO KölnBonn, University Hospital of Cologne, Cologne, Germany

Cologne Interventional Immunology, Department I of Internal Medicine, University Hospital of Cologne, Cologne, Germany

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Geothy Chakupurakal

Geothy Chakupurakal

Stem Cell Transplantation Program, Department I of Internal Medicine, Center for Integrated Oncology CIO KölnBonn, University Hospital of Cologne, Cologne, Germany

Cologne Interventional Immunology, Department I of Internal Medicine, University Hospital of Cologne, Cologne, Germany

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Anke Krause

Anke Krause

Stem Cell Transplantation Program, Department I of Internal Medicine, Center for Integrated Oncology CIO KölnBonn, University Hospital of Cologne, Cologne, Germany

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Anne Fiedler

Anne Fiedler

Cologne Interventional Immunology, Department I of Internal Medicine, University Hospital of Cologne, Cologne, Germany

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Leo Luznik

Leo Luznik

Sidney Kimmel Comprehensive Cancer Center and Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD, USA

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Martin Hellmich

Martin Hellmich

Institute of Medical Statistics, Informatics and Epidemiology, University of Cologne, Cologne, Germany

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Dominik Wolf

Dominik Wolf

Medical Clinic III for Oncology, Haematology and Rheumatology, Center for Integrated Oncology CIO KölnBonn, University Hospital Bonn, Bonn, Germany

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Michael Hallek

Michael Hallek

Stem Cell Transplantation Program, Department I of Internal Medicine, Center for Integrated Oncology CIO KölnBonn, University Hospital of Cologne, Cologne, Germany

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Michael von Bergwelt-Baildon

Michael von Bergwelt-Baildon

Stem Cell Transplantation Program, Department I of Internal Medicine, Center for Integrated Oncology CIO KölnBonn, University Hospital of Cologne, Cologne, Germany

Cologne Interventional Immunology, Department I of Internal Medicine, University Hospital of Cologne, Cologne, Germany

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Christof Scheid

Christof Scheid

Stem Cell Transplantation Program, Department I of Internal Medicine, Center for Integrated Oncology CIO KölnBonn, University Hospital of Cologne, Cologne, Germany

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First published: 23 February 2015
Citations: 55

Abstract

Objective

Post-transplant cyclophosphamide is increasingly used as graft-versus-host disease (GvHD) prophylaxis in the setting of bone marrow transplantation. No data have been published on the use of single-agent GvHD prophylaxis with post-transplant cyclophosphamide in the setting of peripheral blood stem cell transplantation (PBSCT).

Methods

In a phase II trial, 11 patients with myeloma or lymphoma underwent conditioning with fludarabine and busulfan followed by T-replete PBSCT and application of 50 mg/kg/d of cyclophosphamide on day+3 and +4 without other concurrent immunosuppression (IS).

Results

Median time to leukocyte, neutrophil, and platelet engraftment was 18, 21, and 18 d. The incidence of grade II–IV and grade III–IV GvHD was 45% and 27%, with a non-relapse mortality (NRM) of 36% at one and 2 yr. After median follow-up of 927 d, overall and relapse-free survival was 64% and 34%. Three patients did not require any further systemic IS until day+100 and thereafter. Analysis of immune reconstitution demonstrated rapid T- and NK-cell recovery. B- and CD3+/CD161+NK/T-cell recovery was superior in patients not receiving additional IS.

Conclusion

Post-transplant cyclophosphamide as sole IS in PBSCT is feasible and allows rapid immune recovery. Increased rates of severe acute GvHD explain the observed NRM and may advise a temporary combination partner such as mTor-inhibitors in the PBSCT setting.

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