Serum Free Thyroxine and Triiodothyronine Concentrations in Subacute Thyroiditis
| Autor: | Katsumi Yoshida, Hiroshi Furazawa, Hirofumi Kitaora, Kazuro Kaise, Yamamoto M, Toshiro Sakurada, Nobuko Kaise, Shintaro Saito, Kaoru Yoshinaga |
|---|---|
| Rok vydání: | 1982 |
| Předmět: |
Thyroiditis
endocrine system medicine.medical_specialty endocrine system diseases Globulin Endocrinology Diabetes and Metabolism Clinical Biochemistry Biochemistry Thyroxine-Binding Proteins Endocrinology Serum free Internal medicine Alpha-Globulins medicine Humans In patient Short duration Subacute thyroiditis Triiodothyronine biology business.industry Biochemistry (medical) medicine.disease Graves Disease Thyroxine Basal metabolic rate biology.protein business |
| Zdroj: | The Journal of Clinical Endocrinology & Metabolism. 55:185-188 |
| ISSN: | 1945-7197 0021-972X |
| Popis: | Serum absolute free T4 (AFT4) and T3 (AFT3) concentrations were studied in 10 patients with subacute thyroiditis whose total serum T4 levels were elevated, and values were compared with those obtained in 10 patients with untreated Graves' disease, whose total serum T4 concentrations were elevated to the same level as in the former group. The mean (+/- SD) basal metabolic rate in patients with subacute thyroiditis was 16 +/- 14.8%, significantly (P less than 0.001) lower than that in patients with Graves' disease (48.7 +/- 15.7%). Serum T4-binding globulin concentrations measured by RIA were normal and did not differ from those in Graves' disease patients. The percentage of free T4 and AFT4 were both elevated in subacute thyroiditis to a degree comparable to that seen in Graves' disease. The serum total T3, serum free T3 fraction and AFT3 were also elevated, but both total T3 and AFT3 were significantly (P less than 0.05 and P less than 0.05, respectively) lower than in Graves' disease patients. Therefore, the ratios of T3 to T4 and AFT3 to AFT4 were significantly (P less than 0.01 and P less than 0.01, respectively) lower than in Graves' disease patients. These results indicate that the significantly lower basal metabolic rate and milder manifestations of thyrotoxic symptoms in subacute thyroiditis than in Graves' disease might be explained by the low ratios of T3 to T4 and AFT3 to AFT4 as well as the short duration of chemical hyperthyroidism. |
| Databáze: | OpenAIRE |
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