Aktoz, T.Durmus-Altun, G.Usta, U.Torun, N.Ergulen, A.Atakan, I. H.2024-06-122024-06-1220121108-4189https://hdl.handle.net/20.500.14551/18359Background: Ablative radioiodine-131 (I-131) therapy is used in the standart treatment procedure of thyroid carcinoma and procedures using I-131 represent the majority of Nuclear Medicine therapeutic procedures. The principal route of I-131 excretion after the administration of I-131 is the urine. Amifostine is an organic thiophosphate ester prodrug and the kidney concentrations of the active metabolite WR-1065 are about 100 times higher than tumour concentrations. To our knowledge, there is no published data in literature presenting acute effect of radioiodine on renal tissue during high dose I-131 radioiodine treatment (RIT). Additionally, it is not known whether amifostine takes role in this process. Materials and methods: In this study, 50 healthy female Wistar albino rats, weighing 200-250 g and averaging 16 weeks old were utilised. The rats were randomly divided into ten groups. 1-Sham group (n=5), 2-Amifostine group (n=5): rats pretreated with 1 cc amifostine (200 mg/kg) by intraperitoneal injection, 3- Radioactive iodine first day group (RI-1) (n=5): rats treated with 1 cc oral 185 MBq radioactive iodine-131 and sacrification performed after 1st day, 4- Amifostine + Radioactive iodine first day group (A+RI-1) (n=5): rats pretreated with amifostine (200 mg/kg) by intraperitoneal injection and rats treated with 5mCi radioactive iodine-131 and sacrification performed after 1st day. 5- Radioactive iodine third day group (RI-3) (n=5), 6- Amifostine + Radioactive iodine third day group (A+RI-3) (n=5), 7- Radioactive iodine fifth day group (RI-5) (n=5), 8- Amifostine + Radioactive iodine fifth day group (A+RI-5) (n=5), 9- Radioactive iodine seventh day group (RI-7) (n=5) and 10- Amifostine + Radioactive iodine seventh day group (A+RI-7) (n=5). The renal cast formation and tubular damage are evaluated by a pathologist in a blinded manner. Results: Ablative radioiodine-131 therapy induced renal tubular damage was significantly higher in the radioactive iodine fifth day group (RI-5) when compared with the Sham group (p=0.01) and Amifostine group (p=0.01). Conclusions: A marked ablative radioiodine-131 induced renal toxicity was seen at fifth day of the therapy after a single RIT application and the main histopathological change was tubular damage. Amifostine have protective effects against ablative radioiodine-131 therapy and this effect is significant at fifth day of the therapy. Hippokratia. 2012; 16 (1): 4045eninfo:eu-repo/semantics/closedAccessAmifostineRadioiodine TherapyRenal ToxicitySymporterArticle1614045Q3WOS:0002997579000072-s2.0-8485546729123930056Q4