Liver damage and sickle cell disease: genotype relationship

Area of Science:

• Hematology
• Hepatology
• Medical Imaging

Background:

• Sickle hepatopathy is a significant complication of sickle cell disease (SCD), often presenting with a cholestatic pattern.
• Current effective prevention or treatment strategies for sickle hepatopathy remain limited.
• This study investigates liver damage across different SCD genotypes.

Purpose of the Study:

• To evaluate and compare liver damage in adult patients with sickle cell anemia (SCA), sickle cell thalassemia (HbS/β-Thal), and HbSC disease.
• To identify clinical, laboratory, and imaging markers associated with liver abnormalities in SCD.
• To rule out other potential causes of liver damage such as viral infections, high BMI, and alcohol consumption.

Main Methods:

• A single-center observational study involving 68 adult SCD patients (17 SCA, 38 HbS/β-Thal, 13 HbSC).
• Assessment included clinical data, laboratory tests (Hb, HbS, HbF, GGT), and imaging (abdominal ultrasound, vibration-controlled transient elastography for liver stiffness).
• Statistical analyses (univariate and multivariate) were performed to identify early markers of liver damage.

Main Results:

• SCA and HbS/β-Thal patients exhibited more severe functional (elevated GGT) and structural (liver stiffness) liver abnormalities compared to HbSC patients.
• Lower hemoglobin (Hb), higher hemoglobin S (HbS), and frequent vaso-occlusive crises correlated with increased liver damage.
• Hepatotropic viruses, high BMI, and alcohol consumption were excluded as contributing factors in this cohort.

Conclusions:

• Sickle cell anemia and HbS/β-thalassemia are associated with more severe liver damage than HbSC disease.
• Early markers for sickle hepatopathy include male sex, SCA genotype, lower HbF, frequent transfusions, elevated GGT, and abnormal liver ultrasound/stiffness.
• Identifying these markers can aid in early detection and management of sickle hepatopathy.