Pulmonary, gonadal, and central nervous system status after bone marrow transplantation for sickle cell disease

Area of Science:

• Hematology
• Pediatric Medicine
• Transplantation Immunology

Background:

• Severe sickle cell disease (SCD) poses significant risks for central nervous system (CNS) and pulmonary complications.
• Bone marrow transplantation (BMT) is a potential curative therapy for pediatric SCD, but long-term outcomes require further investigation.

Purpose of the Study:

• To assess the long-term impact of human-leukocyte antigen (HLA)-identical sibling BMT on CNS, pulmonary, and gonadal function in children with severe SCD.
• To determine if successful BMT protects against SCD-related complications.

Main Methods:

• Prospective, multicenter study of pediatric patients with SCD undergoing HLA-identical sibling BMT between 1991 and 2000.
• Post-transplant evaluations included CNS assessments (including MRI), pulmonary function tests, and gonadal function studies, conducted 2+ years after BMT.

Main Results:

• Patients with stable donor engraftment experienced no new stroke events; brain MRI showed stable or improved appearance.
• Pulmonary function remained stable or improved in most patients; restrictive and obstructive lung changes showed mixed responses.
• Significant gonadal toxicity was observed, particularly in female recipients.

Conclusions:

• Stable engraftment following HLA-identical sibling BMT effectively prevents sickle cell-related CNS complications and protects against progressive pulmonary disease in children.
• BMT offers a protective effect against SCD complications, though gonadal toxicity is a notable concern.