Fazelipour S, Kiaei SB, Tootian Z, Haeri SA, Zehtabvar O, Sadeghinezhad J. Cimetidine administration decreases radiogenic damage on the thyroid gland in mice.
Int J Radiat Biol 2014;
91:218-23. [PMID:
25347146 DOI:
10.3109/09553002.2014.980464]
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Abstract
PURPOSE
To study if Cimetidine administration could ameliorate the thyroid damage in external radiation.
MATERIALS AND METHODS
Forty healthy male adult mice were used in the present study. The animals were randomized into four groups. Untreated mice (Group 1) that received 1 mg/kg saline intraperitoneally (IP). Group 2 received a single 10 Gy gamma radiation dose with 1 mg/kg saline IP and group 3 were treated with Cimetidine IP. Group 4 was irradiated 1 hour after treatment with Cimetidine. The serum were assayed for the contents of triiodothyronine (T3), tetraiodothyronine (T4), thyroid stimulating hormone (TSH), Free T4 (FT4) and Cortisol using a radioimmunological technique 7 days following radiation. The thyroid tissue was processed and stained with hematoxylin and eosin (H&E), and periodic acid-Schiff (PAS) for histological examination. Data were statistically analyzed using Tukey's post-hoc test and were considered significant at p < 0.05.
RESULTS
External radiation resulted in weight loss and reduction of serum thyroid hormone levels. However, Cimetidine administration prevented marked changes. Histological study showed that Cimetidine injection to irradiated mice minimized the thyroid damage.
CONCLUSIONS
These findings suggested that Cimetidine administration 1 hour before radiation exposure was potent in ameliorating the thyroid damages.
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