The challenges presented by haematopoietic stem cell transplantation in children with primary immunodeficiency

Area of Science:

• Immunology
• Hematology
• Pediatric Medicine

Background:

• Primary immunodeficiencies (PIDs) are a group of genetic disorders affecting the immune system.
• Hematopoietic stem cell transplantation (HSCT) is a curative treatment for many PIDs.
• Patients with PIDs present unique challenges for HSCT.

Purpose of the Study:

• To review recent advancements in HSCT for PIDs.
• To highlight key developments impacting treatment outcomes.
• To identify areas for future research and collaboration.

Main Methods:

• Review of recent scientific literature on HSCT for PIDs.
• Analysis of trends in diagnosis, conditioning regimens, and therapeutic strategies.

Main Results:

• Newborn screening programs significantly improve early diagnosis and outcomes for severe combined immunodeficiency (SCID).
• Early referral for HSCT before co-morbidities develop enhances treatment success.
• Evolving conditioning regimens, including targeted busulfan and treosulfan, reduce toxicity and improve survival.
• Mono-antibody-based conditioning is an emerging, non-chemotherapy approach with future potential.

Conclusions:

• Early diagnosis and intervention are crucial for optimizing HSCT outcomes in PIDs.
• Advancements in conditioning regimens are enhancing HSCT safety and efficacy.
• Multidisciplinary collaboration and international research are vital for addressing rare PIDs and refining treatment strategies.