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Lebsir D, Manens L, Grison S, Lestaevel P, Ebrahimian T, Suhard D, Phan G, Dublineau I, Tack K, Benderitter M, Pech A, Jourdain JR, Souidi M. Effects of repeated potassium iodide administration on genes involved in synthesis and secretion of thyroid hormone in adult male rat. Mol Cell Endocrinol 2018; 474:119-126. [PMID: 29496566 DOI: 10.1016/j.mce.2018.02.017] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/12/2017] [Revised: 02/23/2018] [Accepted: 02/23/2018] [Indexed: 12/23/2022]
Abstract
BACKGROUND A single dose of potassium iodide (KI) is recommended to reduce the risk of thyroid cancer during nuclear accidents. However in case of prolonged radioiodine exposure, more than one dose of KI may be necessary. This work aims to evaluate the potential toxic effect of repeated administration of KI. METHODS Adult Wistar rats received an optimal dose of KI 1 mg/kg over a period of 1, 4 or 8 days. RESULTS hormonal status (TSH, FT4) of treated rats was unaffected. Contrariwise, a sequential Wolff-Chaikoff effect was observed, resulting in a prompt decrease of NIS and MCT8 mRNA expression (-58% and -26% respectively), followed by a delayed decrease of TPO mRNA expression (-33%) in conjunction with a stimulation of PDS mRNA expression (+62%). CONCLUSION we show for the first time that repeated administration of KI at 1 mg/kg/24h doesn't cause modification of thyroid hormones level, but leads to a reversible modification of the expression of genes involved in the synthesis and secretion of thyroid hormones.
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Affiliation(s)
- Dalila Lebsir
- Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PRP-HOM, SRBE, LRTOX, 92262 Fontenay-aux-Roses, France
| | - Line Manens
- Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PRP-HOM, SRBE, LRTOX, 92262 Fontenay-aux-Roses, France
| | - Stephane Grison
- Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PRP-HOM, SRBE, LRTOX, 92262 Fontenay-aux-Roses, France
| | - Philippe Lestaevel
- Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PRP-HOM, SRBE, LRTOX, 92262 Fontenay-aux-Roses, France
| | - Teni Ebrahimian
- Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PRP-HOM, SRBE, LRTOX, 92262 Fontenay-aux-Roses, France
| | - David Suhard
- Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PRP-HOM, SDI, LRC, 92262 Fontenay-aux-Roses, France
| | - Guillaume Phan
- Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PRP-HOM, SDI, LRC, 92262 Fontenay-aux-Roses, France
| | - Isabelle Dublineau
- Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PRP-HOM, 92262 Fontenay-aux-Roses, France
| | - Karine Tack
- Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PRP-HOM, SRBE, LRTOX, 92262 Fontenay-aux-Roses, France
| | - Marc Benderitter
- Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PRP-HOM, 92262 Fontenay-aux-Roses, France
| | - Annick Pech
- Pharmacie centrale des armées, Direction des Approvisionnement en produits de Santé des Armées, 45000 Orléans, France
| | - Jean-Rene Jourdain
- Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PRP-HOM, 92262 Fontenay-aux-Roses, France
| | - Maâmar Souidi
- Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PRP-HOM, SRBE, LRTOX, 92262 Fontenay-aux-Roses, France.
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Sanabria A, Kowalski LP, Shah JP, Nixon IJ, Angelos P, Williams MD, Rinaldo A, Ferlito A. Growing incidence of thyroid carcinoma in recent years: Factors underlying overdiagnosis. Head Neck 2017; 40:855-866. [PMID: 29206325 DOI: 10.1002/hed.25029] [Citation(s) in RCA: 87] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2017] [Revised: 09/24/2017] [Accepted: 10/25/2017] [Indexed: 01/03/2023] Open
Abstract
There is an increasing incidence of well-differentiated thyroid cancer worldwide. Much of the increase is secondary to increased detection of small, low-risk tumors, with questionable clinical significance. This review addresses the factors that contribute to the increasing incidence and considers environmental, and patient-based and clinician-led influences. Articles addressing the causes of the increased incidence were critically reviewed. A complex interplay of environmental, medical, and social pressures has resulted in increased awareness of the thyroid disease risk, increased screening of thyroid cancers, and increased diagnosis of thyroid cancers. Although there is evidence to suggest that the true disease incidence may be changing slightly, most of the increase is related to factors that promote early diagnosis of low-risk lesions, which is resulting in a significant phenomenon of overdiagnosis. An improved understanding of these pressures at a global level will enable healthcare policymakers to react appropriately to this challenge in the future.
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Affiliation(s)
- Alvaro Sanabria
- Department of Surgery, School of Medicine, Universidad de Antioquia, Clinica Vida/Instituto de Cancerología Las Americas, Medellin, Colombia, South America
| | - Luiz P Kowalski
- Department of Head and Neck Surgery and Otorhinolaryngology, A.C. Camargo Cancer Center, Sao Paulo, SP, Brazil
| | - Jatin P Shah
- Department of Head and Neck Oncology, Memorial Sloan Kettering Cancer Center, New York, New York
| | | | - Peter Angelos
- Department of Surgery, University of Chicago, Chicago, Illinois
| | - Michelle D Williams
- Department of Pathology, Division of Pathology/Laboratory Medicine, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | | | - Alfio Ferlito
- Coordinator of the International Head and Neck Scientific Group
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Jargin SV. Debate on the Chernobyl Disaster: Response to Alison Rosamund Katz. INTERNATIONAL JOURNAL OF HEALTH SERVICES 2016; 47:150-159. [PMID: 27956579 DOI: 10.1177/0020731416679343] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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On the RET Rearrangements in Chernobyl-Related Thyroid Cancer. J Thyroid Res 2011; 2012:373879. [PMID: 22175034 PMCID: PMC3235888 DOI: 10.1155/2012/373879] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/06/2011] [Accepted: 10/11/2011] [Indexed: 12/03/2022] Open
Abstract
There is a consensus that Chernobyl accident has induced thyroid cancer increase in children and adolescents. The UNSCEAR report concluded that no somatic disorders other than thyroid cancer were caused by radiation exposure due to the accident except for acute radiation sickness occurred to the people within the Power Plant at the time of the accident. A hypothesis is discussed in this paper that the increase of thyroid cancer was caused predominantly by the screening, overdiagnosis, and registration of nonirradiated persons as Chernobyl victims. A mechanism of thyroid cancer overdiagnosis is described that can be active even today, causing hypertherapy. Older neglected tumors found by the screening shortly after the Chernobyl accident or brought from noncontaminated areas were misclassified as aggressive radiation-induced cancers. Therefore, supposed markers of the radiation-induced thyroid cancer, such as the RET rearrangements, are probably associated with disease duration and tumor progression. The screening effect is obviously dependent on the basis level of medical surveillance: the higher the level, the smaller the screening effect. Absence of any significant increase of thyroid cancer after the Fukushima accident in spite of the vigorous screening would certify the high level of health care in Japan especially for children.
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