Determination of Triiodothyronine in Red Blood Cells by Radioimmunoassay
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概要
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This study was undertaken to determine T<SUB>3</SUB> content in red cells by radioimmunoassay. T<SUB>3</SUB> in red blood cells was solubilized fairly from the stroma by hemolysis and red-cell T<SUB>3</SUB> content could be determined directly by radioimmunoassay of the lysate. After hemolysing red cells with an equal volume of distilled water, 0.4m<I>l</I> of the hemolyzate was used for the assay. The red-cell T<SUB>3</SUB> content was expressed as ng/m<I>l</I> of red-cell volume. The normal T<SUB>3</SUB> range in red cells was 0.20-0.45ng/m<I>l</I>, and the Mean ±SD was 0.32±0.10ng/m<I>l</I>. The limit of detectability was 0.2ng/m<I>l</I>. In hyperthyroid patients, the red-cell T<SUB>3</SUB> content was more than 0.50ng/m<SUB>l</SUB> with a Mean±SD of 1.35±0.65ng/m<I>l</I>. In hypothyroid patients, red cells contained less than 0.25ng/m<SUB>l</SUB> of T<SUB>3</SUB>, and there was an overlap from 0.20 to 0.25ng/m<I>l</I> in the content of red-cell T<SUB>3</SUB> in hypothyroid and euthyroid subjects. The patients with T<SUB>3</SUB> toxicosis showed a high or normal level of red-cell T<SUB>3</SUB>. A positive correlation was noted between the red-cell T<SUB>3</SUB> content and the serum T<SUB>3</SUB> level (<I>r</I>=0.66). The correlation between the red-cell T<SUB>3</SUB> content and the free T<SUB>4</SUB> index (expressed as T<SUB>7</SUB>) was also positive (<I>r</I>=0.67).<BR>From these experiments, it is suggested that the red-cell T<SUB>3</SUB> is low in comparison with the serum T<SUB>3</SUB> levels, and depends on two factors; serum T<SUB>4</SUB> and serum T<SUB>3</SUB> levels.
- 社団法人 日本内分泌学会の論文
著者
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YOSHIMURA Manabu
Second Department of Internal Medicine. Kyoto Prefectural University of Medicine
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TAKAHASHI HAKUO
Second Department of Medicine, Kyoto Prefectural University of Medicine
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HACHIYA TAKASHI
Second Department of Surgery, Hamamatsu University School of Medicine
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Ochi Y
Research Institute For Production Development
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Kaimasu Isao
Second Department Of Internal Medicine Kyoto Prefectural University Of Medicine
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MIYAZAKI TADAYOSHI
Second Department of Internal Medicine Kyoto Prefectural University of Medicine Kyoto
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OCHI YUKIO
Second Department of Internal Medicine Shiga University of Medical Science
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MAJIMA TAKAYA
Second Department of Internal Medicine, Shiga Medical University
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OCHI YUKIO
Second Department of Internal Medicine, Shiga Medical University
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YOSHIMURA Manabu
Second Department of Internal Medicine, Kyoto Prefectural University of Medicine
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YOSHIMURA MANABU
Second Department of Internal Medicine Kyoto Prefectural University of Medicine Kyoto
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TAKAHASHI Hakuo
Second Department of Internal Medicine, Kyoto Prefectural University of Medicine
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TAKAHASHI HAKUO
Second Department of Internal Medicine, Shiga Medical University
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HACHIYA Takashi
Second Department of Internal Medicine, Kyoto Prefectural University of Medicine
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HACHIYA TAKASHI
Second Department of Internal Medicine Kyoto Prefectural University of Medicine Kyoto
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MIYAZAKI TADAYOSHI
Second Department of Internal Medicine, Shiga Medical University
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