Successful cord blood transplantation for a CHARGE syndrome with CHD7 mutation showing DiGeorge sequence including...

Area of Science:

• Immunology
• Genetics
• Pediatrics

Background:

• CHARGE syndrome, characterized by multiple anomalies, rarely presents with DiGeorge sequence, leading to severe immunodeficiency due to thymic defects.
• Hematopoietic cell transplantation is a potential treatment for immunological recovery in these patients, but long-term survival remains a challenge.
• The association between CHARGE syndrome and hypoparathyroidism is not well-established.

Purpose of the Study:

• To report a case of CHARGE syndrome with DiGeorge sequence, thymic aplasia, severe hypoparathyroidism, and cardiac anomaly.
• To evaluate the efficacy of unrelated cord blood transplantation without conditioning in a patient with CHARGE syndrome and severe immunodeficiency.
• To investigate the potential for T cell recovery independent of thymic output.

Main Methods:

• Case study of a CHARGE syndrome patient with a CHD7 mutation.
• Unrelated cord blood transplantation without conditioning.
• Monitoring of T cell recovery and function post-transplantation.

Main Results:

• The patient exhibited DiGeorge sequence, including T cell defects, thymic aplasia, severe hypoparathyroidism, and conotruncal cardiac anomaly.
• Successful immunological recovery was achieved through peripheral expansion of mature T cells from the cord blood, without thymic output.
• The patient survived for 10 months post-transplantation without serious infections, despite persistent severe hypoparathyroidism.

Conclusions:

• Hematopoietic cell transplantation can lead to T cell recovery in CHARGE syndrome patients with DiGeorge sequence and thymic aplasia.
• This approach offers a viable treatment option for severe immunodeficiency in contexts where thymic transplantation is not feasible.
• Further research is needed to understand the long-term implications and management of hypoparathyroidism in these patients.