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Original Article
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Volume 344:881-888 March 22, 2001 Number 12
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Treatment of Chronic Granulomatous Disease with Nonmyeloablative Conditioning and a T-Cell–Depleted Hematopoietic Allograft
Mitchell E. Horwitz, M.D., A. John Barrett, M.D., Margaret R. Brown, B.S., Charles S. Carter, M.T., Richard Childs, M.D., John I. Gallin, M.D., Steven M. Holland, M.D., Gilda F. Linton, M.T., Judi A. Miller, R.N., Susan F. Leitman, M.D., Elizabeth J. Read, M.D., and Harry L. Malech, M.D.

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ABSTRACT

Background The treatment of chronic granulomatous disease with conventional allogeneic hematopoietic stem-cell transplantation carries a high risk of serious complications and death. We investigated the feasibility of stem-cell transplantation without ablation of the recipient's bone marrow.

Methods Ten patients, five children and five adults, with chronic granulomatous disease underwent peripheral-blood stem-cell transplantation from an HLA-identical sibling. We used a nonmyeloablative conditioning regimen consisting of cyclophosphamide, fludarabine, and antithymocyte globulin. The allograft was depleted of T cells to reduce the risk of severe graft-versus-host disease. Donor lymphocytes were administered at intervals of 30 days or more after the transplantation to facilitate engraftment.

Results After a median follow-up of 17 months (range, 8 to 26), the proportion of donor neutrophils in the circulation in 8 of the 10 patients was 33 to 100 percent, a level that can be expected to provide normal host defense; in 6 the proportion was 100 percent. In two patients, graft rejection occurred. Acute graft-versus-host disease (grade II, III, or IV) developed in three of the four adult patients with engraftment, one of whom subsequently had chronic graft-versus-host disease. None of the five children had grade II, III, or IV acute graft-versus-host disease. During the follow-up period, four serious infections occurred among the patients who had engraftment. Three of the 10 recipients died. Preexisting granulomatous lesions resolved in the patients in whom transplantation was successful.

Conclusions Nonmyeloablative conditioning followed by a T-cell–depleted hematopoietic stem-cell allograft is a feasible option for patients with chronic granulomatous disease, recurrent life-threatening infections, and an HLA-identical family donor.


Source Information

From the Laboratory of Host Defenses, National Institute of Allergy and Infectious Diseases (M.E.H., J.I.G., S.M.H., G.F.L., J.A.M., H.L.M.), the National Heart, Lung, and Blood Institute (A.J.B., R.C.), the Clinical Pathology Department (M.R.B.), and the Department of Transfusion Medicine (C.S.C., S.F.L., E.J.R.), National Institutes of Health, Bethesda, Md. Other authors were Ronald E. Gress, M.D., National Cancer Institute, and James Schermerhorn, P.A.-C., National Institute of Allergy and Infectious Diseases.

Address reprint requests to Dr. Horwitz at the Laboratory of Host Defenses, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bldg. 10, Room 11N117, MC 1886, Bethesda, MD 20892, or at mhorwitz{at}nih.gov.

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