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Serum reverse triiodothyronine (rT3) in children with goitre
Acta Paediatrica Academiae Scientiarum Hungaricae
|January 1, 1980
Summary
Children with goitre showed decreased reverse T3 (rT3) levels. This suggests altered thyroid hormone metabolism, with increased T4 to T3 conversion or changes in T3 and rT3 clearance in goitrous children.
Area of Science:
- Endocrinology
- Pediatric Endocrinology
- Thyroidology
Background:
- Goitre, an enlargement of the thyroid gland, can affect thyroid hormone levels.
- Thyroid hormones, including triiodothyronine (T3) and thyroxine (T4), are crucial for metabolism.
- Reverse T3 (rT3) is an inactive thyroid hormone isomer.
Purpose of the Study:
- To investigate serum concentrations of thyroid hormones in children with goitre.
- To compare thyroid hormone profiles between goitrous children and healthy controls.
- To explore potential alterations in thyroid hormone metabolism in pediatric goitre.
Main Methods:
- Measurement of serum concentrations of reverse T3 (rT3), T3, T4, and TSH.
- Comparison between two groups of children with goitre (grade II and III) and age-matched controls.
Main Results:
- Children with goitre exhibited significantly decreased average serum rT3 levels compared to controls.
- The rT3/T4 ratio showed similar changes across both goitrous groups and controls.
- Findings indicate a potential shift in thyroid hormone deiodination pathways.
Conclusions:
- Goitre in children is associated with reduced serum rT3 levels.
- Thyroid hormone metabolism appears altered, with possible increased T4 to T3 conversion or modified clearance of T3 and rT3.
- Further research is needed to elucidate the precise mechanisms of these metabolic changes in pediatric goitre.