Beta-Thalassaemia types in southern Sardinia

Area of Science:

• Hematology
• Medical Genetics

Background:

• Beta-thalassaemia is a significant inherited blood disorder.
• Understanding the specific genetic types is crucial for patient management.

Purpose of the Study:

• To determine the prevalence of different beta-thalassaemia types in southern Sardinia.
• To characterize the beta-thalassaemia genotypes in patients with thalassaemia major and intermedia.

Main Methods:

• Utilized cellulose acetate and agar gel electrophoresis.
• Employed globin chain synthesis analysis via column chromatography.
• Analyzed a cohort of 347 patients with thalassaemia major/intermedia and a subgroup of 82 transfusion-dependent patients.

Main Results:

• The majority of thalassaemia major and intermedia patients were identified as beta0-thalassaemia homozygotes.
• Globin chain synthesis analysis consistently showed no beta-globin production in affected patients, irrespective of transfusion status.
• No correlation was found between kappa/gamma ratios and clinical severity or hypersplenism.
• Newborn screening in infants with homozygous beta0-thalassaemia revealed imbalanced or borderline kappa/gamma ratios.

Conclusions:

• Beta0-thalassaemia homozygosity is the predominant genotype for thalassaemia major and intermedia in southern Sardinia.
• Globin chain synthesis analysis is a reliable method for diagnosing beta-thalassaemia.
• Kappa/gamma ratios may not be a reliable indicator of clinical severity in this population.