Transplantation of the bone marrow from a HLA-compatible unrelated donor after immunoablative conditioning in children with acquired aplastic anemia unresponsive to combined immunosuppressive therapy: Preliminary results


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Abstract

Aim. To analyze the efficiency of transplantation of the bone marrow from a HLA-compatible unrelated donor and continued immunosuppressive therapy (IST) in children with aplastic anemia (AA) unresponsive to 2 courses of IST.
Subjects and methods. The study enrolled 14 children aged 2-16 years (median 9 years). A control group comprised 26 patients in whom IST was continued. The median interval between the diagnosis of AA and transplantation was 26 months (9-156 months). The conditioning regimen consisted of thoracoabdominal irradiation in a dose of 2 Gy, fludarabin (Flu) 100-150 mg/m2, cyclophosphamide (Cy) 100-200 mg/kg, antithymocyte globulin (ATG) in 11 patients and Flu, Cy, and ATG in 3. A graft-versus-host reaction was prevented with mycophenolate mefetil in all the patients, tacrolimus in 11, and cyclosporin A in 3. Donors were compatible for high-resolution typing of 10/10 and 9/10 alleles in 8 and 6 patients, respectively; the source of a transplant was bone marrow in 13 patients and granulocyte colony-stimulating factor-mobilized peripheral blood precursors in one case.
Results. Thirteen patients achieved primary engraftment after single transplantation; one patient did after repeat transplantation. Grades I to II graft-versus-host reaction (GVHR) developed in 9 patients; postengraftment life-threatening infections in 3, extensive chronic GVHR in 2, circumscribed GVHR in 7. All fourteen hemopoietic cell transplant recipients followed for a median 17.5 months (range 1-71 months) were survivors.
Conclusion. The likelihood of good survival after unrelated transplantations in AA is much higher than that after continued IST: 100% versus 15±11%.

About the authors

G A Novichkova

Federal Research and Clinical Centre of Pediatric Hematology, Oncology and Immunology, Ministry of Health of the Russian Federation

Federal Research and Clinical Centre of Pediatric Hematology, Oncology and Immunology, Ministry of Health of the Russian Federation

M A Maschan

Federal Research and Clinical Centre of Pediatric Hematology, Oncology and Immunology, Ministry of Health of the Russian Federation

Federal Research and Clinical Centre of Pediatric Hematology, Oncology and Immunology, Ministry of Health of the Russian Federation

I P Shipitsyna

Russian Children's Hospital, Moscow

Russian Children's Hospital, Moscow

Yu V Skvortsova

Russian Children's Hospital, Moscow

Russian Children's Hospital, Moscow

M I Persiantseva

Federal Research and Clinical Centre of Pediatric Hematology, Oncology and Immunology, Ministry of Health of the Russian Federation

Federal Research and Clinical Centre of Pediatric Hematology, Oncology and Immunology, Ministry of Health of the Russian Federation

L L Lebedeva

Russian Children's Hospital, Moscow

Russian Children's Hospital, Moscow

V O Bobrynina

Federal Research and Clinical Centre of Pediatric Hematology, Oncology and Immunology, Ministry of Health of the Russian Federation

Federal Research and Clinical Centre of Pediatric Hematology, Oncology and Immunology, Ministry of Health of the Russian Federation

D D Baidildina

Russian Children's Hospital, Moscow

Russian Children's Hospital, Moscow

O V Goronkova

Russian Children's Hospital, Moscow

Russian Children's Hospital, Moscow

G G Solopova

Russian Children's Hospital, Moscow

Russian Children's Hospital, Moscow

L A Khachatryan

Federal Research and Clinical Centre of Pediatric Hematology, Oncology and Immunology, Ministry of Health of the Russian Federation

Federal Research and Clinical Centre of Pediatric Hematology, Oncology and Immunology, Ministry of Health of the Russian Federation

U N Petrova

Federal Research and Clinical Centre of Pediatric Hematology, Oncology and Immunology, Ministry of Health of the Russian Federation

Federal Research and Clinical Centre of Pediatric Hematology, Oncology and Immunology, Ministry of Health of the Russian Federation

E V Suntsova

Russian Children's Hospital, Moscow

Russian Children's Hospital, Moscow

I I Kalinina

Federal Research and Clinical Centre of Pediatric Hematology, Oncology and Immunology, Ministry of Health of the Russian Federation

Federal Research and Clinical Centre of Pediatric Hematology, Oncology and Immunology, Ministry of Health of the Russian Federation

V V Sinitsyna

Federal Research and Clinical Centre of Pediatric Hematology, Oncology and Immunology, Ministry of Health of the Russian Federation

Federal Research and Clinical Centre of Pediatric Hematology, Oncology and Immunology, Ministry of Health of the Russian Federation

E V Skorobogatova

Russian Children's Hospital, Moscow

Russian Children's Hospital, Moscow

D N Balashov

Federal Research and Clinical Centre of Pediatric Hematology, Oncology and Immunology, Ministry of Health of the Russian FederationRussian Children's Hospital, Moscow

Federal Research and Clinical Centre of Pediatric Hematology, Oncology and Immunology, Ministry of Health of the Russian FederationRussian Children's Hospital, Moscow

Z M Dyshlevaya

Russian Children's Hospital, Moscow

Russian Children's Hospital, Moscow

L N Shelikhova

Russian Children's Hospital, Moscow

Russian Children's Hospital, Moscow

E E Kurnikova

Russian Children's Hospital, Moscow

Russian Children's Hospital, Moscow

P E Trakhtman

Russian Children's Hospital, Moscow

Russian Children's Hospital, Moscow

A A Maschan

Federal Research and Clinical Centre of Pediatric Hematology, Oncology and Immunology, Ministry of Health of the Russian Federation

Federal Research and Clinical Centre of Pediatric Hematology, Oncology and Immunology, Ministry of Health of the Russian Federation

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