Gene therapy for the fetus: is there a future?

Area of Science:

• Medical Genetics
• Developmental Biology
• Immunology

Background:

• Gene therapy, involving intracellular genetic material delivery, targets various diseases including inherited genetic disorders.
• Current treatment options for prenatal diagnosis of inherited diseases are limited to termination or managing affected children.

Purpose of the Study:

• To explore the potential benefits and feasibility of fetal gene therapy for treating early-onset genetic disorders.
• To highlight fetal gene therapy as a potential third option for families facing prenatal diagnosis of inherited diseases.

Main Methods:

• Investigating gene transfer to fetal stem cells for permanent gene correction.
• Examining the induction of immune tolerance in fetal models to allow for repeated treatments.
• Evaluating minimally invasive delivery techniques for fetal application.

Main Results:

• Fetal gene transfer targets rapidly expanding stem cells, inaccessible post-birth, enabling permanent gene correction with integrating vectors.
• The immature fetal immune system can be induced into immune tolerance, allowing for potential repeat treatments after birth.
• Animal models of congenital diseases like hemophilia show promise for fetal gene therapy.

Conclusions:

• Fetal gene therapy presents a viable strategy for treating and potentially preventing early-onset genetic disorders.
• Advancements in genetic understanding, vector design, and delivery methods are advancing fetal gene therapy towards clinical application.
• Further research is essential to ensure the safety, reliability, and cost-effectiveness of fetal gene therapy before clinical implementation.