PURPOSE: The aim of this study was to evaluate the frequency of chromosomal abnormalities in thyroid cancer patients before and after radioactive iodine administration in order to assess cytogenetic particularity in Polynesian thyroid cancer patients. METHODS: Chromosomal abnormalities were studied in 30 Polynesian patients with differentiated thyroid cancer, prior to and 4 days after 131I administration. Unstable chromosomal abnormalities were counted in peripheral blood lymphocytes using a conventional cytogenetic method. Peripheral blood was irradiated in vitro at different doses (0.5, 1 and 2 Gy) in order to establish the dose-response of the lymphocytes. Control groups were composed of 50 European thyroid cancer patients before and after first administration of 131I, and of ten European healthy donors. In addition, in vitro irradiation assays were performed at different doses (0.5, 1 and 2 Gy). RESULTS: The relative risk of spontaneous dicentrics before any radiation treatment was 2.9 (95% CI 1.7-5.1) times higher among Polynesian thyroid patients than among European thyroid cancer patients. After in vitro irradiation, the rise in frequency of dicentrics was similar in the Polynesian thyroid cancer group and the European thyroid patients and healthy donors. Four days after administration of 3.7 GBq 131I, the relative risk for a dicentric per cell was 1.3 (95% CI 1.0-1.5) times higher in Polynesian than in European patients. This can be explained by higher 131I retention in Polynesian compared with European patients. The results obtained revealed an increased frequency of cytogenetic abnormalities in Polynesian thyroid cancer patients compared with European control patients. CONCLUSION: These preliminary findings are compatible with possible previous environmental aggression and therefore imply a need for further investigations on larger series including, in particular, French Polynesian healthy donors. In addition to French Polynesians, Maori and Hawaiian control groups could be useful.
PURPOSE: The aim of this study was to evaluate the frequency of chromosomal abnormalities in thyroid cancerpatients before and after radioactive iodine administration in order to assess cytogenetic particularity in Polynesian thyroid cancerpatients. METHODS:Chromosomal abnormalities were studied in 30 Polynesian patients with differentiated thyroid cancer, prior to and 4 days after 131I administration. Unstable chromosomal abnormalities were counted in peripheral blood lymphocytes using a conventional cytogenetic method. Peripheral blood was irradiated in vitro at different doses (0.5, 1 and 2 Gy) in order to establish the dose-response of the lymphocytes. Control groups were composed of 50 European thyroid cancerpatients before and after first administration of 131I, and of ten European healthy donors. In addition, in vitro irradiation assays were performed at different doses (0.5, 1 and 2 Gy). RESULTS: The relative risk of spontaneous dicentrics before any radiation treatment was 2.9 (95% CI 1.7-5.1) times higher among Polynesian thyroidpatients than among European thyroid cancerpatients. After in vitro irradiation, the rise in frequency of dicentrics was similar in the Polynesian thyroid cancer group and the European thyroidpatients and healthy donors. Four days after administration of 3.7 GBq 131I, the relative risk for a dicentric per cell was 1.3 (95% CI 1.0-1.5) times higher in Polynesian than in European patients. This can be explained by higher 131I retention in Polynesian compared with European patients. The results obtained revealed an increased frequency of cytogenetic abnormalities in Polynesian thyroid cancerpatients compared with European control patients. CONCLUSION: These preliminary findings are compatible with possible previous environmental aggression and therefore imply a need for further investigations on larger series including, in particular, French Polynesian healthy donors. In addition to French Polynesians, Maori and Hawaiian control groups could be useful.
Authors: Pavel Vodicka; Rajiv Kumar; Rudolf Stetina; Somali Sanyal; Pavel Soucek; Vincent Haufroid; Maria Dusinska; Miroslava Kuricova; Maria Zamecnikova; Ludovit Musak; Jana Buchancova; Hannu Norppa; Ari Hirvonen; Ludmila Vodickova; Alessio Naccarati; Zora Matousu; Kari Hemminki Journal: Carcinogenesis Date: 2004-01-16 Impact factor: 4.944
Authors: R M'Kacher; J D Légal; M Schlumberger; B Aubert; N Beron-Gaillard; A Gaussen; C Parmentier Journal: J Nucl Med Date: 1997-03 Impact factor: 10.057
Authors: Igor K Khvostunov; Vladimir A Saenko; Valeri Krylov; Andrei Rodichev; Shunichi Yamashita Journal: Radiat Environ Biophys Date: 2017-05-19 Impact factor: 1.925
Authors: A Giussani; M A Lopez; H Romm; A Testa; E A Ainsbury; M Degteva; S Della Monaca; G Etherington; P Fattibene; I Güclu; A Jaworska; D C Lloyd; I Malátová; S McComish; D Melo; J Osko; A Rojo; S Roch-Lefevre; L Roy; E Shishkina; N Sotnik; S Y Tolmachev; A Wieser; C Woda; M Youngman Journal: Radiat Environ Biophys Date: 2020-05-05 Impact factor: 1.925