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I-131-induced changes in rat thyroid gland function (CROSBI ID 134446)

Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija

Torlak, Vesela ; Zemunik, Tatijana ; Modun, Darko ; Čapkun, Vesna ; Pešutić-Pisac, Valdi ; Markotić, Anita ; Pavela-Vrančić, Maja ; Staničić, Ante I-131-induced changes in rat thyroid gland function // Brazilian Journal of Medical and Biological Research, 40 (2007), 8; 1087-1094

Podaci o odgovornosti

Torlak, Vesela ; Zemunik, Tatijana ; Modun, Darko ; Čapkun, Vesna ; Pešutić-Pisac, Valdi ; Markotić, Anita ; Pavela-Vrančić, Maja ; Staničić, Ante

engleski

I-131-induced changes in rat thyroid gland function

Therapeutic doses of (131)I administered to thyrotoxic patients may cause thyroid failure. The present study used a rat model to determine thyroid function after the administration of different doses of (131)I (64-277 microCi). Thirty male Fisher rats in the experimental group and 30 in the control group (untreated) were followed for 6 months. The animals were 4 months old at the beginning of the experiment and were sacrificed at an age of 9 months. Hormone concentration was determined before (131)I administration (4-month-old animals) and three times following (131)I administration, when the animals were 7, 8, and 9 months old. The thyroid glands were removed and weighed, their volume was determined and histopathological examination was performed at the end of the experiment. Significant differences in serum triiodothyronine and thyroid-stimulating hormone concentration, measured at the age of 7, 8, and 9 months, were found in the experimental group. During aging of the animals, the concentration of thyroxin fell from 64.8 +/- 8.16 to 55.0 +/- 6.1 nM in the control group and from 69.4 +/- 6.9 to 25.4 +/- 3.2 nM in the experimental group. Thyroid gland volume and weight were significantly lower in the experimental than in the control group. Thyroid glands from the experimental group showed hyaline thickness of the blood vessel wall, necrotic follicles, a strong inflammatory reaction, and peeling of necrotic cells in the follicles. In conclusion, significant differences in hormone levels and histopathological findings indicated prolonged hypothyroidism after (131)I administration to rats, which was not (131)I dose dependent.

thyroid gland; 131I; hormones; histopathology; T3; T4; TSH

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Podaci o izdanju

40 (8)

2007.

1087-1094

objavljeno

0100-879X

Povezanost rada

Temeljne medicinske znanosti

Indeksiranost