Normalization of C1 Inhibitor in a Patient with Hereditary Angioedema

Area of Science:

• Genetics and Immunology
• Hepatology
• Rare Diseases

Background:

• Hereditary angioedema (HAE) is a rare, life-threatening autosomal dominant disorder characterized by bradykinin dysregulation.
• Mutations in the SERPING1 gene, encoding C1 inhibitor (C1-INH), are responsible for nearly all HAE cases.
• C1-INH, produced in the liver, is crucial for regulating the kallikrein-kinin system.

Purpose of the Study:

• To report a unique case of a patient with hereditary angioedema undergoing liver transplantation.
• To investigate the effect of liver transplantation on C1 inhibitor levels and function in a patient with HAE.
• To explore the potential of liver transplantation as a curative therapy for hereditary angioedema.

Main Methods:

• Genetic confirmation of hereditary angioedema and low C1 inhibitor levels in an infant.
• Liver transplantation performed for biliary atresia, an unrelated condition.
• Post-transplantation monitoring of C1 inhibitor levels and function.

Main Results:

• The infant had genetically confirmed hereditary angioedema with low C1 inhibitor levels.
• Following liver transplantation, C1 inhibitor levels and function normalized.
• The patient experienced no prior angioedema episodes before transplantation.

Conclusions:

• Liver transplantation normalized C1 inhibitor levels and function in an infant with hereditary angioedema.
• This case suggests that liver transplantation may offer a potential cure for hereditary angioedema.
• Further research is warranted to confirm the long-term efficacy and applicability of this approach.