PMID- 34700314 OWN - NLM STAT- MEDLINE DCOM- 20220126 LR - 20220126 IS - 1361-6498 (Electronic) IS - 0952-4746 (Linking) VI - 42 IP - 1 DP - 2022 Jan 18 TI - Protection and safety of a repeated dosage of KI for iodine thyroid blocking during pregnancy. LID - 10.1088/1361-6498/ac336e [doi] AB - In case of nuclear power plant accidents resulting in the release of radioactive iodine ((131)I) in large amounts, a single intake of stable iodine is recommended in order to prevent(131)I fixation to the thyroid gland. However, in situations of prolonged exposure to(131)I (e.g. Fukushima-Daiichi natural and nuclear disaster), repetitive administration of iodine may be necessary to ensure adequate protection, with acceptable safety in vulnerable populations including pregnant women. Here we conducted toxicological studies on adult rats progeny following prolonged exposure to potassium iodide (KI)in utero. Pregnant Wistar rats were treated with 1 mg kg d(-1)KI or saline water for 2 or 4 d either between gestation days gestational day (GD) GD 9-12, or GD13-16. Plasma samples from the progeny were tested 30 d post-weaning for clinical biochemistry, thyroid hormones, and anti-thyroid antibody levels. Thyroid and brain were collected for gene expression analysis. The hormonal status was similar for the mothers in all experimental conditions. In the offspring, while thyroid-stimulating hormone and anti-thyroid peroxidase (anti-TPO) antibody levels were similar in all groups, a significant increase of FT3 and FT4 levels was observed in GD9-GD10 and in GD13-GD14 animals treated for 2 d, respectively. In addition, FT4 levels were mildly decreased in 4 d treated GD13-16 individuals. Moreover, a significant decrease in the expression level of thyroid genes involved in iodide metabolism, TPO and apical iodide transporter, was observed in GD13-GD14 animals treated for 2 d. We conclude that repeated KI administration for 2-4 d during gestation did not induce strong thyroid toxicity. CI - Creative Commons Attribution license. FAU - Gaouaoui-Azouaou, Hayat AU - Gaouaoui-Azouaou H AD - Institut de radioprotection et de surete Nucleaire (IRSN), PSE-SANTE, 92290 Fontenay-aux-Roses, France. FAU - L'Homme, Bruno AU - L'Homme B AD - Institut de radioprotection et de surete Nucleaire (IRSN), PSE-SANTE, 92290 Fontenay-aux-Roses, France. FAU - Benadjaoud, Mohamed Amine AU - Benadjaoud MA AD - Institut de radioprotection et de surete Nucleaire (IRSN), PSE-SANTE, 92290 Fontenay-aux-Roses, France. FAU - Sache-Aloui, Amandine AU - Sache-Aloui A AD - Institut de radioprotection et de surete Nucleaire (IRSN), PSE-SANTE, 92290 Fontenay-aux-Roses, France. FAU - Granger, Romain AU - Granger R AD - Institut de radioprotection et de surete Nucleaire (IRSN), PSE-SANTE, 92290 Fontenay-aux-Roses, France. FAU - Voyer, Frederic AU - Voyer F AD - Institut de radioprotection et de surete Nucleaire (IRSN), PSE-SANTE, 92290 Fontenay-aux-Roses, France. FAU - Lestaevel, Philippe AU - Lestaevel P AD - Institut de radioprotection et de surete Nucleaire (IRSN), PSE-SANTE, 92290 Fontenay-aux-Roses, France. FAU - Gruel, Gaetan AU - Gruel G AD - Institut de radioprotection et de surete Nucleaire (IRSN), PSE-SANTE, 92290 Fontenay-aux-Roses, France. FAU - Caire-Maurisier, Francois AU - Caire-Maurisier F AD - Pharmacie Centrale des Armees, Direction des Approvisionnement en produits de sante des armees, 45404 Fleury-les Aubrais, France. FAU - Crambes, Caroline AU - Crambes C AD - Pharmacie Centrale des Armees, Direction des Approvisionnement en produits de sante des armees, 45404 Fleury-les Aubrais, France. FAU - Dare-Doyen, Stephanie AU - Dare-Doyen S AD - Institut de radioprotection et de surete Nucleaire (IRSN), PSE-SANTE, 92290 Fontenay-aux-Roses, France. FAU - Benderitter, Marc AU - Benderitter M AD - Institut de radioprotection et de surete Nucleaire (IRSN), PSE-SANTE, 92290 Fontenay-aux-Roses, France. FAU - Souidi, Maamar AU - Souidi M AUID- ORCID: 0000-0001-8269-9676 AD - Institut de radioprotection et de surete Nucleaire (IRSN), PSE-SANTE, 92290 Fontenay-aux-Roses, France. LA - eng PT - Journal Article DEP - 20220118 PL - England TA - J Radiol Prot JT - Journal of radiological protection : official journal of the Society for Radiological Protection JID - 8809257 RN - 0 (Iodides) RN - 0 (Iodine Radioisotopes) RN - 1C4QK22F9J (Potassium Iodide) RN - 9679TC07X4 (Iodine) SB - IM MH - Animals MH - Female MH - Humans MH - Iodides MH - *Iodine MH - Iodine Radioisotopes MH - Potassium Iodide MH - Pregnancy MH - Rats MH - Rats, Wistar MH - *Thyroid Neoplasms OTO - NOTNLM OT - gestation OT - iodine thyroid blocking OT - nuclear accident OT - potassium iodine OT - progeny OT - thyroid hormones EDAT- 2021/10/27 06:00 MHDA- 2022/01/27 06:00 CRDT- 2021/10/26 20:31 PHST- 2021/09/07 00:00 [received] PHST- 2021/10/26 00:00 [accepted] PHST- 2021/10/27 06:00 [pubmed] PHST- 2022/01/27 06:00 [medline] PHST- 2021/10/26 20:31 [entrez] AID - 10.1088/1361-6498/ac336e [doi] PST - epublish SO - J Radiol Prot. 2022 Jan 18;42(1). doi: 10.1088/1361-6498/ac336e.