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<I>The present studies examine the effect of starvation together with cold or hot exposure on thyroid hormone levels in rats. At 23°C starved for 5 days, serum thyroid hormone levels decreased significantly compared with fed rats, averaging 3.6±0.5μg/dl of thyroxine (T</I><SUB>4</SUB>), <I> 47±11 ng/dl of triiodothyronine (T</I><SUB>3</SUB>), <I> 1.4±0.3 ng/dl of free T4 and 39.6±5.1 pg/ml of reverse T</I><SUB>3</SUB>, <I> respectively. At 15°C rats starved for 5 days, serum free T</I><SUB>4</SUB> <I>level significantly more increased than that of 23°C starved rats, while serum T</I><SUB>4</SUB> <I>level and T</I><SUB>3</SUB> <I>did not increase significantly. At 30°C rats whether concomitant starvation or not, serum thyroid hormone levels of both group markedly more decreased than control rats</I>.<BR><I>These experiment provide additional evidence that thyroid gland and the peripheral metabolism of thyroid hormone respond to variety situations such as cold or hot exposure together with starvation or not.</I>
- 社団法人 日本アイソトープ協会の論文
社団法人 日本アイソトープ協会 | 論文
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