Endocrine function in thalassaemia

Area of Science:

• Pediatrics
• Endocrinology
• Hematology

Background:

• Beta-thalassemia/hemoglobin E and hemoglobin H diseases are common genetic blood disorders.
• Endocrine complications are significant in thalassemia patients, particularly those receiving frequent transfusions.
• Limited data exists on endocrine function in non-transfused or minimally transfused young patients.

Purpose of the Study:

• To investigate endocrine abnormalities in Thai adolescents with beta-thalassemia/hemoglobin E and hemoglobin H diseases.
• To assess growth, sexual maturity, and hormonal secretion in this specific patient cohort.
• To compare findings with previously reported data from hypertransfused populations.

Main Methods:

• Study included 21 Thai patients aged 8-20 years with beta-thalassemia/hemoglobin E and hemoglobin H diseases.
• Patients received none or minimal blood transfusions.
• Evaluated clinical endocrine parameters, growth hormone (GH) secretion, oral glucose tolerance tests (GTT), insulin levels, thyroid function, and adrenal function (cortisol, 24-h urinary oxogenic steroids).

Main Results:

• Significant growth retardation and sexual immaturity were observed.
• Impaired GH secretion was present in most patients.
• Chemical diabetes incidence (1/16) was lower than in Western hypertransfused patients.
• Basal and post-glucose insulin levels were lower than in normal controls.
• Thyroid and adrenal functions were normal in all patients.

Conclusions:

• Non-transfused or minimally transfused Thai adolescents with beta-thalassemia/hemoglobin E and hemoglobin H diseases exhibit distinct endocrine profiles.
• Growth and sexual maturation are key concerns, alongside impaired GH secretion.
• The lower incidence of chemical diabetes suggests transfusion status significantly impacts metabolic complications.