Apolipoprotein E gene polymorphism and the risk of left ventricular dysfunction among Egyptian β-thalassemia major

Area of Science:

• Cardiology
• Genetics
• Hematology

Background:

• Beta-thalassemia is a prevalent hereditary hemolytic anemia in Egypt.
• Cardiac dysfunction due to iron overload is the leading cause of mortality in beta-thalassemia patients.
• Apolipoprotein E (Apo E) possesses antioxidant properties, suggesting a potential role in mitigating cardiac damage.

Purpose of the Study:

• To investigate the association between apolipoprotein E (Apo E) allelic genotype and left ventricular (LV) dysfunction in Egyptian patients with beta-thalassemia major.
• To determine if Apo E genotype serves as a genetic risk factor for cardiac complications in this population.

Main Methods:

• Echocardiography was used to assess LV function in 50 beta-thalassemia major patients.
• Apolipoprotein E (Apo E) genotyping was performed using polymerase chain reaction restriction fragment length polymorphism (PCR-RFLP).
• Patients were categorized into three groups based on clinical and echocardiographic findings of LV function and failure.

Main Results:

• The Apo E4 allele was found at a significantly higher frequency in patients with LV dilatation (Group II) and LV failure (Group III) compared to healthy controls.
• This suggests a correlation between the presence of the Apo E4 allele and the development of cardiac dysfunction.

Conclusions:

• The Apo E4 allele is identified as a significant genetic risk factor for left ventricular (LV) dysfunction in beta-thalassemia major patients.
• Apo E genotyping can serve as a predictive indicator for increased risk of LV failure, especially in asymptomatic patients with LV dilatation, prompting closer monitoring.