Liver Involvement in Children with Alpha-1 Antitrypsin Deficiency: A Multicenter Study

Area of Science:

• Pediatric Hepatology
• Genetic Liver Diseases
• Alpha-1 Antitrypsin Deficiency

Background:

• Alpha-1 antitrypsin deficiency (A1ATD) is a significant genetic factor contributing to pediatric liver disease.
• Early identification and management are crucial for improving outcomes in affected children.

Purpose of the Study:

• To investigate the clinical characteristics and long-term outcomes of pediatric patients diagnosed with A1ATD.
• To analyze the differences in presentation and progression between homozygous (PiZZ) and heterozygous (PiMZ) genotypes.

Main Methods:

• A retrospective study involving 25 pediatric patients with A1ATD from five specialized hepatology centers.
• Data collected included demographics, clinical manifestations, genetic findings (PiZZ vs. PiMZ), and patient outcomes.

Main Results:

• The PiZZ genotype was associated with significantly lower alpha-1 antitrypsin levels compared to the PiMZ genotype (37.6 vs. 66.5 mg/dL).
• A majority of patients (72%) exhibited long-term liver pathology, including chronic hepatitis and cirrhosis.
• One patient with the PiZZ genotype died, highlighting the potential severity of the condition.

Conclusions:

• Screening for alpha-1 antitrypsin levels is recommended for children with liver disorders, even if A1ATD is considered rare.
• Long-term follow-up is critical for managing the liver complications associated with A1ATD in pediatric patients.