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Author Spotlight: In Vivo Assessment of Thyroid Hormone Disruption Using the THAI Mouse Model
Published on: October 6, 2023
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Summary
Hyperthyroidism significantly elevates hemoglobin A2 (Hb A2) levels. Antithyroid therapy normalizes Hb A2 and improves red cell mean corpuscular volume (MCV), suggesting a specific hematologic profile for hyperthyroidism.
Area of Science:
- Hematology
- Endocrinology
- Clinical Chemistry
Background:
- Hyperthyroidism is associated with various hematologic alterations.
- Erythrocyte hemoglobin A2 (Hb A2) levels in hyperthyroid patients require further investigation.
Purpose of the Study:
- To quantitate Hb A2 levels in hyperthyroid patients before and during antithyroid therapy.
- To monitor fetal hemoglobin (Hb F) and red cell mean corpuscular volume (MCV) alongside Hb A2.
- To propose a hematologic profile for hyperthyroidism.
Main Methods:
- Quantification of Hb A2, Hb F, and MCV in 28 hyperthyroid patients.
- Serial measurements were taken before and during antithyroid therapy.
- Analysis of hematologic parameters in response to treatment.
Main Results:
- Significantly elevated Hb A2 levels (3.3% +/- 0.5%) were observed in hyperthyroid patients compared to normals (2.5% +/- 0.3%).
- Elevated Hb F (>1.0%) was noted in 10 patients, with a tendency towards microcytosis (mean MCV 81.1 fl).
- Following successful antithyroid therapy, Hb A2 levels decreased, and MCV increased in 10 subjects.
Conclusions:
- Hyperthyroidism is characterized by elevated Hb A2 levels and potential microcytosis.
- Antithyroid therapy leads to normalization of Hb A2 and improvement in MCV.
- A distinct hematologic profile for hyperthyroidism is suggested, responsive to treatment.
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