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Barrea L, Verde L, Annunziata G, Camajani E, Caprio M, Sojat AS, Marina LV, Guarnotta V, Colao A, Muscogiuri G. Role of Mediterranean diet in endocrine diseases: a joint overview by the endocrinologist and the nutritionist. J Endocrinol Invest 2024; 47:17-33. [PMID: 37697017 PMCID: PMC10776748 DOI: 10.1007/s40618-023-02169-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/06/2023] [Accepted: 07/28/2023] [Indexed: 09/13/2023]
Abstract
PURPOSE The purpose of this review is to examine the current evidence on the potential role of Mediterranean diet (MD) in the prevention and management of endocrine disorders and to highlight the importance of interdisciplinary collaboration between endocrinologists and nutritionists. METHODS A literature search was conducted using PubMed and Google Scholar databases to identify relevant studies published in English. Studies were selected based on their relevance to the role of MD in the prevention and management of endocrine disorders. The search terms included "Mediterranean diet," "endocrine disorders," "thyroid disorders," "gonadal disorders," and "neuroendocrine tumors". RESULTS The studies reviewed suggest that MD may have a beneficial effect in the prevention and management of various endocrine disorders, including thyroid disorders, gonadal disorders, and neuroendocrine tumors. MD has been associated with decreased risk of nodular thyroid disease and thyroid cancer, improved male and female reproductive health, and a potential role in the management of neuroendocrine tumors. MD's anti-inflammatory and antioxidant properties, as well as its high levels of phytochemicals, may play a role in its beneficial effects. CONCLUSION Interdisciplinary collaboration between endocrinologists and nutritionists is essential for the optimal management of endocrine disorders, including the potential role of MD in their prevention and management. While further research is needed, the current evidence suggests that MD may have a protective effect against endocrine disorders, and its incorporation into dietary recommendations may be beneficial.
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Affiliation(s)
- L Barrea
- Dipartimento di Scienze Umanistiche, Università Telematica Pegaso, Via Porzio, Centro Direzionale, Isola F2, 80143, Naples, Italy
- Centro Italiano per la cura e il Benessere del paziente con Obesità (C.I.B.O), Dipartimento di Medicina Clinica e Chirurgia, Unità di Endocrinologia, Diabetologia e Andrologia, Università degli Studi di Napoli Federico II, Via Sergio Pansini 5, 80131, Naples, Italy
| | - L Verde
- Centro Italiano per la cura e il Benessere del paziente con Obesità (C.I.B.O), Dipartimento di Medicina Clinica e Chirurgia, Unità di Endocrinologia, Diabetologia e Andrologia, Università degli Studi di Napoli Federico II, Via Sergio Pansini 5, 80131, Naples, Italy
- Department of Public Health, University of Naples Federico II, Naples, Italy
| | - G Annunziata
- Department of Pharmacy, Federico II University, 80131, Naples, Italy
| | - E Camajani
- Department of Human Sciences and Promotion of the Quality of Life, San Raffaele Open University, 00166, Rome, Italy
- Laboratory of Cardiovascular Endocrinology, San Raffaele Research Institute, IRCCS San Raffaele Roma, Via di Val Cannuta, 247, 00166, Rome, Italy
| | - M Caprio
- Department of Human Sciences and Promotion of the Quality of Life, San Raffaele Open University, 00166, Rome, Italy
- Laboratory of Cardiovascular Endocrinology, San Raffaele Research Institute, IRCCS San Raffaele Roma, Via di Val Cannuta, 247, 00166, Rome, Italy
| | - A S Sojat
- National Centre for Infertility and Endocrinology of Gender, Clinic for Endocrinology Diabetes and Metabolic Diseases, University Clinical Centre of Serbia, Belgrade, Serbia
| | - L V Marina
- National Centre for Infertility and Endocrinology of Gender, Clinic for Endocrinology Diabetes and Metabolic Diseases, University Clinical Centre of Serbia, Belgrade, Serbia
| | - V Guarnotta
- Section of Endocrinology, Department of Health Promotion, Mother and Child Care, Internal Medicine and Medical Specialties "G. D'Alessandro" (PROMISE), University of Palermo, Piazza delle Cliniche 2, 90127, Palermo, Italy
| | - A Colao
- Centro Italiano per la cura e il Benessere del paziente con Obesità (C.I.B.O), Dipartimento di Medicina Clinica e Chirurgia, Unità di Endocrinologia, Diabetologia e Andrologia, Università degli Studi di Napoli Federico II, Via Sergio Pansini 5, 80131, Naples, Italy
- Dipartimento di Medicina Clinica e Chirurgia, Unità di Endocrinologia, Diabetologia e Andrologia, Università degli Studi di Napoli Federico II, Via Sergio Pansini 5, 80131, Naples, Italy
- Cattedra Unesco "Educazione alla salute e allo sviluppo sostenibile", University Federico II, Naples, Italy
| | - G Muscogiuri
- Centro Italiano per la cura e il Benessere del paziente con Obesità (C.I.B.O), Dipartimento di Medicina Clinica e Chirurgia, Unità di Endocrinologia, Diabetologia e Andrologia, Università degli Studi di Napoli Federico II, Via Sergio Pansini 5, 80131, Naples, Italy.
- Dipartimento di Medicina Clinica e Chirurgia, Unità di Endocrinologia, Diabetologia e Andrologia, Università degli Studi di Napoli Federico II, Via Sergio Pansini 5, 80131, Naples, Italy.
- Cattedra Unesco "Educazione alla salute e allo sviluppo sostenibile", University Federico II, Naples, Italy.
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Gianì F, Masto R, Trovato MA, Malandrino P, Russo M, Pellegriti G, Vigneri P, Vigneri R. Heavy Metals in the Environment and Thyroid Cancer. Cancers (Basel) 2021; 13:4052. [PMID: 34439207 PMCID: PMC8393334 DOI: 10.3390/cancers13164052] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2021] [Revised: 07/26/2021] [Accepted: 08/09/2021] [Indexed: 12/31/2022] Open
Abstract
In recent decades, the incidence of thyroid cancer has increased more than most other cancers, paralleling the generalized worldwide increase in metal pollution. This review provides an overview of the evidence supporting a possible causative link between the increase in heavy metals in the environment and thyroid cancer. The major novelty is that human thyroid stem/progenitor cells (thyrospheres) chronically exposed to different metals at slightly increased environmentally relevant concentrations show a biphasic increase in proliferation typical of hormesis. The molecular mechanisms include, for all metals investigated, the activation of the extracellular signal-regulated kinase (ERK1/2) pathway. A metal mixture, at the same concentration of individual metals, was more effective. Under the same conditions, mature thyrocytes were unaffected. Preliminary data with tungsten indicate that, after chronic exposure, additional abnormalities may occur and persist in thyrocytes derived from exposed thyrospheres, leading to a progeny population of transformation-prone thyroid cells. In a rat model predisposed to develop thyroid cancer, long-term exposure to low levels of metals accelerated and worsened histological signs of malignancy in the thyroid. These studies provide new insight on metal toxicity and carcinogenicity occurring in thyroid cells at a low stage of differentiation when chronically exposed to metal concentrations that are slightly increased, albeit still in the "normal" range.
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Affiliation(s)
- Fiorenza Gianì
- Endocrinology, Garibaldi-Nesima Medical Center, Department of Clinical and Experimental Medicine, University of Catania, 95122 Catania, Italy; (F.G.); (R.M.); (P.M.); (M.R.); (G.P.)
| | - Roberta Masto
- Endocrinology, Garibaldi-Nesima Medical Center, Department of Clinical and Experimental Medicine, University of Catania, 95122 Catania, Italy; (F.G.); (R.M.); (P.M.); (M.R.); (G.P.)
| | | | - Pasqualino Malandrino
- Endocrinology, Garibaldi-Nesima Medical Center, Department of Clinical and Experimental Medicine, University of Catania, 95122 Catania, Italy; (F.G.); (R.M.); (P.M.); (M.R.); (G.P.)
| | - Marco Russo
- Endocrinology, Garibaldi-Nesima Medical Center, Department of Clinical and Experimental Medicine, University of Catania, 95122 Catania, Italy; (F.G.); (R.M.); (P.M.); (M.R.); (G.P.)
| | - Gabriella Pellegriti
- Endocrinology, Garibaldi-Nesima Medical Center, Department of Clinical and Experimental Medicine, University of Catania, 95122 Catania, Italy; (F.G.); (R.M.); (P.M.); (M.R.); (G.P.)
| | - Paolo Vigneri
- Medical Oncology and Center of Experimental Oncology and Hematology, Department of Clinical and Experimental Medicine, University of Catania, A.O.U. Policlinico Vittorio Emanuele, 95125 Catania, Italy;
| | - Riccardo Vigneri
- Endocrinology, Garibaldi-Nesima Medical Center, Department of Clinical and Experimental Medicine, University of Catania, 95122 Catania, Italy; (F.G.); (R.M.); (P.M.); (M.R.); (G.P.)
- Consiglio Nazionale delle Ricerche, Cristallography Institute, Catania Section, via P. Gaifami 18, 95126 Catania, Italy
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3
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Malandrino P, Russo M, Gianì F, Pellegriti G, Vigneri P, Belfiore A, Rizzarelli E, Vigneri R. Increased Thyroid Cancer Incidence in Volcanic Areas: A Role of Increased Heavy Metals in the Environment? Int J Mol Sci 2020; 21:ijms21103425. [PMID: 32408629 PMCID: PMC7279170 DOI: 10.3390/ijms21103425] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Revised: 05/09/2020] [Accepted: 05/09/2020] [Indexed: 12/19/2022] Open
Abstract
Thyroid cancer incidence is significantly increased in volcanic areas, where relevant non-anthropogenic pollution with heavy metals is present in the environment. This review will discuss whether chronic lifelong exposure to slightly increased levels of metals can contribute to the increase in thyroid cancer in the residents of a volcanic area. The influence of metals on living cells depends on the physicochemical properties of the metals and their interaction with the target cell metallostasis network, which includes transporters, intracellular binding proteins, and metal-responsive elements. Very little is known about the carcinogenic potential of slightly increased metal levels on the thyroid, which might be more sensitive to mutagenic damage because of its unique biology related to iodine, which is a very reactive and strongly oxidizing agent. Different mechanisms could explain the specific carcinogenic effect of borderline/high environmental levels of metals on the thyroid, including (a) hormesis, the nonlinear response to chemicals causing important biological effects at low concentrations; (b) metal accumulation in the thyroid relative to other tissues; and (c) the specific effects of a mixture of different metals. Recent evidence related to all of these mechanisms is now available, and the data are compatible with a cause–effect relationship between increased metal levels in the environment and an increase in thyroid cancer incidence.
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Affiliation(s)
- Pasqualino Malandrino
- Endocrinology, Department of Clinical and Experimental Medicine, University of Catania, Garibaldi-Nesima Medical Center, 95122 Catania, Italy; (P.M.); (M.R.); (F.G.); (G.P.); (A.B.)
| | - Marco Russo
- Endocrinology, Department of Clinical and Experimental Medicine, University of Catania, Garibaldi-Nesima Medical Center, 95122 Catania, Italy; (P.M.); (M.R.); (F.G.); (G.P.); (A.B.)
| | - Fiorenza Gianì
- Endocrinology, Department of Clinical and Experimental Medicine, University of Catania, Garibaldi-Nesima Medical Center, 95122 Catania, Italy; (P.M.); (M.R.); (F.G.); (G.P.); (A.B.)
| | - Gabriella Pellegriti
- Endocrinology, Department of Clinical and Experimental Medicine, University of Catania, Garibaldi-Nesima Medical Center, 95122 Catania, Italy; (P.M.); (M.R.); (F.G.); (G.P.); (A.B.)
| | - Paolo Vigneri
- Medical Oncology and the Center of Experimental Oncology and Hematology, Department of Clinical and Experimental Medicine, University of Catania, A.O.U. Policlinico Vittorio Emanuele, 95125 Catania, Italy;
| | - Antonino Belfiore
- Endocrinology, Department of Clinical and Experimental Medicine, University of Catania, Garibaldi-Nesima Medical Center, 95122 Catania, Italy; (P.M.); (M.R.); (F.G.); (G.P.); (A.B.)
| | - Enrico Rizzarelli
- Department of Chemical Sciences, University of Catania, 95125 Catania, Italy;
- Consiglio Nazionale delle Ricerche, Cristallography Institute (Catania Section), via P. Gaifami 18, 95126 Catania, Italy
- Consorzio Interuniversitario di Ricerca in Chimica dei Metalli nei Sistemi Biologici (CIRCMSB), via Celso Ulpiani 27, 70126 Bari, Italy
| | - Riccardo Vigneri
- Endocrinology, Department of Clinical and Experimental Medicine, University of Catania, Garibaldi-Nesima Medical Center, 95122 Catania, Italy; (P.M.); (M.R.); (F.G.); (G.P.); (A.B.)
- Consiglio Nazionale delle Ricerche, Cristallography Institute (Catania Section), via P. Gaifami 18, 95126 Catania, Italy
- Correspondence: ; Tel.: +39-095-759-8747
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Barrea L, Gallo M, Ruggeri RM, Giacinto PD, Sesti F, Prinzi N, Adinolfi V, Barucca V, Renzelli V, Muscogiuri G, Colao A, Baldelli R. Nutritional status and follicular-derived thyroid cancer: An update. Crit Rev Food Sci Nutr 2020; 61:25-59. [PMID: 31997660 DOI: 10.1080/10408398.2020.1714542] [Citation(s) in RCA: 47] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
The incidence of differentiated thyroid cancer has been increasing in the last decades all over the world. Such a steady growth cannot be entirely attributable to more intensive thyroid nodule screening and more sensitive diagnostic procedures. Several environmental factors have changed with sufficient rapidity in the same time frame and may represent credible candidates for this increase. They include modified iodine intake, lifestyle-associated risk factors, exposure to various toxic compounds, pollutants and xenobiotics, nutritional deficiencies, eating habits and comorbidities. Foremost, nutritional patterns have gained high interest as possible promoters and modifiable risk factors for thyroid cancer in recent years. The aim of this narrative review is to focus on the relationship between thyroid cancer and nutritional factors, dietary habits and obesity. Low iodine intake has been associated to increased risk of thyroid cancer, favoring the development of more aggressive histotypes. Moreover, correction of iodine deficiency can shift thyroid cancer subtypes toward less aggressive forms, without affecting the overall risk for cancer. Actually, evidence regarding the association between selenium and vitamin D deficiency and thyroid cancer is very limited, despite their well-known anti-cancer potentials, and the clinical usefulness of their supplementation is still uncertain in this setting. Albeit the relationship between single foods and thyroid cancer is difficult to examine, fish and iodine-rich foods, vegetables, and fruits might exert protective effects on thyroid cancer risk. Conversely, no clear association has been found for other foods to date. Lastly, a clear association between obesity and the risk of thyroid cancer, with more aggressive behavior, seems to emerge from most studies, likely involving variations in thyroid function and chronic inflammation mediated by cytokines, insulin, leptin and adiponectins. Although no definite association between dietary factors and thyroid cancer has been firmly established so far, some nutritional patterns, together with excessive weight, seem to play a relevant role in thyroid cancer carcinogenesis as well as in its severity and aggressiveness. These effects may play an additive role to the well-established one exerted by environmental carcinogens, such as pollutants and radiation exposure.
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Affiliation(s)
- Luigi Barrea
- Unit of Endocrinology, Dipartimento di Medicina Clinica e Chirurgia, Federico II University Medical School of Naples, Naples, Italy
| | - Marco Gallo
- Oncological Endocrinology Unit, Department of Medical Sciences, University of Turin, AOU Città della Salute e della Scienza di Torino, Turin, Italy
| | - Rosaria Maddalena Ruggeri
- Unit of Endocrinology, Department of Clinical and Experimental Medicine, University of Messina, Messina, Italy
| | - Paola Di Giacinto
- Endocrinology Unit, Department of Oncology and Medical Specialities, A.O. San Camillo-Forlanini, Rome, Italy
| | - Franz Sesti
- Department of Experimental Medicine, Sapienza University of Rome, Rome, Italy
| | - Natalie Prinzi
- Department of Medical Oncology, Fondazione IRCCS Istituto Nazionale Tumori Milano, ENETS Center of Excellence, Milan, Italy
| | - Valerio Adinolfi
- Endocrinology and Diabetology Unit, ASL Verbano Cusio Ossola, Domodossola, Italy
| | - Viola Barucca
- Digestive and Liver Disease Unit, S. Andrea Hospital, Faculty of Medicine and Psychology, Sapienza University of Rome, Rome, Italy
| | - Valerio Renzelli
- Department of Experimental Medicine, Sapienza University of Rome, Rome, Italy
| | - Giovanna Muscogiuri
- Unit of Endocrinology, Dipartimento di Medicina Clinica e Chirurgia, Federico II University Medical School of Naples, Naples, Italy
| | - Annamaria Colao
- Unit of Endocrinology, Dipartimento di Medicina Clinica e Chirurgia, Federico II University Medical School of Naples, Naples, Italy
| | - Roberto Baldelli
- Endocrinology Unit, Department of Oncology and Medical Specialities, A.O. San Camillo-Forlanini, Rome, Italy
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5
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Zamora-Ros R, Béraud V, Franceschi S, Cayssials V, Tsilidis KK, Boutron-Ruault MC, Weiderpass E, Overvad K, Tjønneland A, Eriksen AK, Bonnet F, Affret A, Katzke V, Kühn T, Boeing H, Trichopoulou A, Valanou E, Karakatsani A, Masala G, Grioni S, de Magistris MS, Tumino R, Ricceri F, Skeie G, Parr CL, Merino S, Salamanca-Fernández E, Chirlaque MD, Ardanaz E, Amiano P, Almquist M, Drake I, Hennings J, Sandström M, Bueno-de-Mesquita HB, Peeters PH, Khaw KT, Wareham NJ, Schmidt JA, Perez-Cornago A, Aune D, Riboli E, Slimani N, Scalbert A, Romieu I, Agudo A, Rinaldi S. Consumption of fruits, vegetables and fruit juices and differentiated thyroid carcinoma risk in the European Prospective Investigation into Cancer and Nutrition (EPIC) study. Int J Cancer 2018; 142:449-459. [PMID: 28688112 PMCID: PMC6198931 DOI: 10.1002/ijc.30880] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2017] [Revised: 05/29/2017] [Accepted: 06/20/2017] [Indexed: 12/21/2022]
Abstract
Fruit and vegetable (F&V) intake is considered as probably protective against overall cancer risk, but results in previous studies are not consistent for thyroid cancer (TC). The purpose of this study is to examine the association between the consumption of fruits, vegetables, fruit juices and differentiated thyroid cancer risk within the European Prospective Investigation into Cancer and Nutrition (EPIC) study. The EPIC study is a cohort including over half a million participants, recruited between 1991 and 2000. During a mean follow-up of 14 years, 748 incident first primary differentiated TC cases were identified. F&V and fruit juice intakes were assessed through validated country-specific dietary questionnaires. Hazard ratios (HRs) and 95% confidence intervals (CIs) were estimated using Cox regression models adjusted for potential confounding factors. Comparing the highest versus lowest quartile of intake, differentiated TC risk was not associated with intakes of total F&V (HR: 0.89; 95% CI: 0.68-1.15; p-trend = 0.44), vegetables (HR: 0.89; 95% CI: 0.69-1.14; p-trend = 0.56), or fruit (HR: 1.00; 95% CI: 0.79-1.26; p-trend = 0.64). No significant association was observed with any individual type of vegetable or fruit. However, there was a positive borderline trend with fruit juice intake (HR: 1.23; 95% CI: 0.98-1.53; p-trend = 0.06). This study did not find any significant association between F&V intakes and differentiated TC risk; however a positive trend with fruit juice intake was observed, possibly related to its high sugar content.
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Affiliation(s)
- Raul Zamora-Ros
- Unit of Nutrition and Cancer, Cancer Epidemiology Research Programme, Catalan Institute of Oncology, Bellvitge Biomedical Research Institute (IDIBELL), Barcelona, Spain
| | - Virginie Béraud
- Unit of Nutrition and Cancer, Cancer Epidemiology Research Programme, Catalan Institute of Oncology, Bellvitge Biomedical Research Institute (IDIBELL), Barcelona, Spain
| | | | - Valerie Cayssials
- Unit of Nutrition and Cancer, Cancer Epidemiology Research Programme, Catalan Institute of Oncology, Bellvitge Biomedical Research Institute (IDIBELL), Barcelona, Spain
| | - Konstantinos K. Tsilidis
- Department of Hygiene and Epidemiology, University of Ioannina School of Medicine, Ioannina, Greece
- School of Public Health, Imperial College London, London, UK
| | - Marie-Christine Boutron-Ruault
- CESP, Université Paris-Sud, UVSQ, INSERM, Université Paris-Saclay, Villejuif, France
- Institut Gustave Roussy, F-94805, Villejuif, France
| | - Elisabete Weiderpass
- Department of Community Medicine, Faculty of Health Sciences, UiT, The Artic University of Tromsø, Tromsø, Norway
- Department of Research, Cancer Registry of Norway, Institute of Population-Based Cancer Research, Oslo, Norway
- Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden
- Genetic Epidemiology Group, Folkhälsan Research Center, Helsinki, Finland
| | - Kim Overvad
- Department of Public Health, Section for Epidemiology, Aarhus University, Aarhus, Denmark
| | | | | | - Fabrice Bonnet
- CESP, Université Paris-Sud, UVSQ, INSERM, Université Paris-Saclay, Villejuif, France
- Institut Gustave Roussy, F-94805, Villejuif, France
- CHU Rennes, Rennes 1 University, Rennes, France
| | - Aurélie Affret
- CESP, Université Paris-Sud, UVSQ, INSERM, Université Paris-Saclay, Villejuif, France
- Institut Gustave Roussy, F-94805, Villejuif, France
| | - Verena Katzke
- Division of Cancer Epidemiology, German Cancer Research Center, Heidelberg, Germany
| | - Tilman Kühn
- Division of Cancer Epidemiology, German Cancer Research Center, Heidelberg, Germany
| | - Heiner Boeing
- Department of Epidemiology, German Institute of Human Nutrition Potsdam-Rehbruecke, Nuthetal, Germany
| | - Antonia Trichopoulou
- Hellenic Health Foundation, Athens, Greece
- WHO Collaborating Center for Nutrition and Health, Unit of Nutritional Epidemiology and Nutrition in Public Health, Dept. of Hygiene, Epidemiology and Medical Statistics, School of Medicine, National and Kapodistrian University of Athens, Greece
| | | | - Anna Karakatsani
- Hellenic Health Foundation, Athens, Greece
- 2nd Pulmonary Medicine Department, School of Medicine, National and Kapodistrian University of Athens, “ATTIKON” University Hospital, Haidari, Greece
| | - Giovanna Masala
- Cancer Risk Factors and Life-Style Epidemiology Unit, Cancer Research and Prevention Institute – ISPO, Florence, Italy
| | - Sara Grioni
- Nutritional Epidemiology Unit, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, Italy
| | | | - Rosario Tumino
- Cancer Registry and Histopathology Unit, "Civic M.P. Arezzo" Hospital, ASP Ragusa, Italy
| | - Fulvio Ricceri
- Department of Clinical and Biological Sciences, University of Turin, Turin, Italy
- Unit of Epidemiology, Regional Health Service ASL TO3, Grugliasco (TO), Italy
| | - Guri Skeie
- Department of Community Medicine, Faculty of Health Sciences, UiT, The Artic University of Tromsø, Tromsø, Norway
| | - Christine L Parr
- Domain of Mental and Physical Health, Norwegian Institute of Public Health, Oslo, Norway
| | | | - Elena Salamanca-Fernández
- Escuela Andaluza de Salud Pública. Instituto de Investigación Biosanitaria ibs.Granada. Hospitales Universitarios de Granada/Universidad de Granada, Granada, Spain
- CIBER de Epidemiología y Salud Pública (CIBERESP), Spain
| | - Maria-Dolores Chirlaque
- CIBER de Epidemiología y Salud Pública (CIBERESP), Spain
- Department of Epidemiology, Regional Health Council, IMIB-Arrixaca, Murcia, Spain
- Department of Health and Social Sciences, Universidad de Murcia, Murcia, Spain
| | - Eva Ardanaz
- CIBER de Epidemiología y Salud Pública (CIBERESP), Spain
- Navarra Public Health Institute, Pamplona, Spain
- Navarra Institute for Health Research (IdiSNA) Pamplona, Spain
| | - Pilar Amiano
- CIBER de Epidemiología y Salud Pública (CIBERESP), Spain
- Public Health Division of Gipuzkoa, Regional Government of the Basque Country, Spain
| | - Martin Almquist
- Department of Surgery, University Hospital Lund, Lund, Sweden
- Malmö Diet and Cancer Study, University Hospital Malmö, Malmö, Sweden
| | - Isabel Drake
- Department of Clinical Sciences Malmö, Lund University, Malmö, Sweden
| | - Joakim Hennings
- Department of Surgical and Perioperative Sciences, Umeå University, Umeå, Sweden
| | - Maria Sandström
- Department for Radiation Sciences, Umeå University, Umeå, Sweden
| | - H. Bas Bueno-de-Mesquita
- School of Public Health, Imperial College London, London, UK
- Department for Determinants of Chronic Diseases (DCD), National Institute for Public Health and the Environment (RIVM), Bilthoven, The Netherlands
| | - Petra H. Peeters
- School of Public Health, Imperial College London, London, UK
- Department of Epidemiology, Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Kay-Thee Khaw
- Department of Public Health and Primary Care, University of Cambridge, UK
| | - Nicholas J. Wareham
- MRC Epidemiology Unit, University of Cambridge School of Clinical Medicine, Cambridge, UK
| | | | | | - Dagfinn Aune
- School of Public Health, Imperial College London, London, UK
- Department of Public Health and General Practice, Norwegian University of Science and Technology, Trondheim, Norway
- Bjørknes University College, Oslo, Norway
| | - Elio Riboli
- School of Public Health, Imperial College London, London, UK
| | - Nadia Slimani
- International Agency for Research on Cancer (IARC), Lyon, France
| | | | - Isabelle Romieu
- International Agency for Research on Cancer (IARC), Lyon, France
| | - Antonio Agudo
- Unit of Nutrition and Cancer, Cancer Epidemiology Research Programme, Catalan Institute of Oncology, Bellvitge Biomedical Research Institute (IDIBELL), Barcelona, Spain
| | - Sabina Rinaldi
- International Agency for Research on Cancer (IARC), Lyon, France
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6
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Luca E, Fici L, Ronchi A, Marandino F, Rossi ED, Caristo ME, Malandrino P, Russo M, Pontecorvi A, Vigneri R, Moretti F. Intake of Boron, Cadmium, and Molybdenum enhances rat thyroid cell transformation. JOURNAL OF EXPERIMENTAL & CLINICAL CANCER RESEARCH : CR 2017; 36:73. [PMID: 28577555 PMCID: PMC5455132 DOI: 10.1186/s13046-017-0543-z] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/15/2017] [Accepted: 05/25/2017] [Indexed: 12/13/2022]
Abstract
Background Epidemiologic data in volcanic areas suggest that environmental factors might be involved in the increase of thyroid cancer (TC) incidence. Recent reports indicate that several heavy metals and metalloids are increased in volcanic areas. This study aims to evaluate the combined effect of three of these elements Boron (B), Cadmium (Cd), and Molybdenum (Mo) - all increased in the volcanic area of Mt. Etna, in Italy - on thyroid tumorigenesis in the rat. Methods Female Wistar rats prone to develop thyroid tumors by low-iodine diet and methimazole treatment received ad libitum drinking water supplemented with B, Cd, and Mo at concentrations in the range found in the urine samples of residents of the volcanic area. At 5 and 10 months animals were euthanized, and their thyroid analysed. Statistical analysis was performed with a 2-way unpaired t-test. Results No toxic effect of the three elements on the growth of the animals was observed. A significant increase of histological features of transformation was observed in thyroid follicular cells of rats treated with B, Cd, and Mo compared with those of control group. These abnormalities were associated with decreased iodine content in the thyroid. Conclusions This study provides the evidence that slightly increased environmental concentrations of B, Cd, and Mo can accelerate the appearance of transformation marks in the thyroid gland of hypothyroid rats.
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Affiliation(s)
- Emilia Luca
- Institute of Pathology and Postgraduate School of Endocrinology, Catholic University of Roma, Rome, Italy
| | - Laura Fici
- Institute of Pathology and Postgraduate School of Endocrinology, Catholic University of Roma, Rome, Italy.,Institute of Cell Biology and Neurobiology, National Research Council of Italy (CNR), Via del Fosso di Fiorano, 64, 00143, Rome, Italy
| | - Anna Ronchi
- National Center of Tossicology, IRCCS Foundation Salvatore Maugeri, Pavia, Italy
| | - Ferdinando Marandino
- Department of Surgical Pathology, "Regina Elena" National Cancer Institute, Rome, Italy
| | - Esther Diana Rossi
- Institute of Pathology and Postgraduate School of Endocrinology, Catholic University of Roma, Rome, Italy
| | - Maria Emiliana Caristo
- Institute of Pathology and Postgraduate School of Endocrinology, Catholic University of Roma, Rome, Italy
| | - Pasqualino Malandrino
- Endocrinology, Department of Clinical and Experimental Medicine, University of Catania, Garibaldi-Nesima Medical Center, Via Palermo, 636, 95122, Catania, Italy
| | - Marco Russo
- Endocrinology, Department of Clinical and Experimental Medicine, University of Catania, Garibaldi-Nesima Medical Center, Via Palermo, 636, 95122, Catania, Italy
| | - Alfredo Pontecorvi
- Institute of Pathology and Postgraduate School of Endocrinology, Catholic University of Roma, Rome, Italy
| | - Riccardo Vigneri
- Endocrinology, Department of Clinical and Experimental Medicine, University of Catania, Garibaldi-Nesima Medical Center, Via Palermo, 636, 95122, Catania, Italy. .,Institute of Biostructure and Bioimaging, (CNR), Catania, Italy.
| | - Fabiola Moretti
- Institute of Cell Biology and Neurobiology, National Research Council of Italy (CNR), Via del Fosso di Fiorano, 64, 00143, Rome, Italy. .,"Regina Elena" National Cancer Institute, Rome, Italy.
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Drozd VM, Saenko VA, Brenner AV, Drozdovitch V, Pashkevich VI, Kudelsky AV, Demidchik YE, Branovan I, Shiglik N, Rogounovitch TI, Yamashita S, Biko J, Reiners C. Major Factors Affecting Incidence of Childhood Thyroid Cancer in Belarus after the Chernobyl Accident: Do Nitrates in Drinking Water Play a Role? PLoS One 2015; 10:e0137226. [PMID: 26397978 PMCID: PMC4580601 DOI: 10.1371/journal.pone.0137226] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2015] [Accepted: 08/14/2015] [Indexed: 11/21/2022] Open
Abstract
One of the major health consequences of the Chernobyl Nuclear Power Plant accident in 1986 was a dramatic increase in incidence of thyroid cancer among those who were aged less than 18 years at the time of the accident. This increase has been directly linked in several analytic epidemiological studies to iodine-131 (131I) thyroid doses received from the accident. However, there remains limited understanding of factors that modify the 131I-related risk. Focusing on post-Chernobyl pediatric thyroid cancer in Belarus, we reviewed evidence of the effects of radiation, thyroid screening, and iodine deficiency on regional differences in incidence rates of thyroid cancer. We also reviewed current evidence on content of nitrate in groundwater and thyroid cancer risk drawing attention to high levels of nitrates in open well water in several contaminated regions of Belarus, i.e. Gomel and Brest, related to the usage of nitrogen fertilizers. In this hypothesis generating study, based on ecological data and biological plausibility, we suggest that nitrate pollution may modify the radiation-related risk of thyroid cancer contributing to regional differences in rates of pediatric thyroid cancer in Belarus. Analytic epidemiological studies designed to evaluate joint effect of nitrate content in groundwater and radiation present a promising avenue of research and may provide useful insights into etiology of thyroid cancer.
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Affiliation(s)
- Valentina M. Drozd
- The International fund “Help for patients with radiation-induced thyroid cancer “Arnica”, Minsk, Belarus
- Department of Endocrinology, Belarusian Medical Academy for Postgraduate Education, Minsk, Belarus
| | - Vladimir A. Saenko
- Department of Radiation Molecular Epidemiology, Atomic Bomb Disease Institute, Nagasaki University, Sakamoto, Nagasaki, Japan
- * E-mail:
| | - Alina V. Brenner
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, United States Department of Health and Human Services, Bethesda, Maryland, United States of America
| | - Vladimir Drozdovitch
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, United States Department of Health and Human Services, Bethesda, Maryland, United States of America
| | - Vasilii I. Pashkevich
- Laboratory of Hydrogeology and Hydroecology, Institute for Nature Management of the National Academy of Sciences, Minsk, Belarus
| | - Anatoliy V. Kudelsky
- Laboratory of Hydrogeology and Hydroecology, Institute for Nature Management of the National Academy of Sciences, Minsk, Belarus
| | - Yuri E. Demidchik
- Department of Oncology, Belarusian Medical Academy for Postgraduate Education, Minsk, Belarus
| | - Igor Branovan
- Project Chernobyl, Brooklyn, New York, United States of America
| | - Nikolay Shiglik
- Project Chernobyl, Brooklyn, New York, United States of America
| | - Tatiana I. Rogounovitch
- Department of Global Health, Medicine and Welfare, Atomic Bomb Disease Institute, Nagasaki University, Sakamoto, Nagasaki, Japan
| | - Shunichi Yamashita
- Department of Radiation Molecular Epidemiology, Atomic Bomb Disease Institute, Nagasaki University, Sakamoto, Nagasaki, Japan
- Department of Radiation Medical Sciences, Atomic Bomb Disease Institute, Nagasaki University, Sakamoto, Nagasaki, Japan
| | - Johannes Biko
- The International fund “Help for patients with radiation-induced thyroid cancer “Arnica”, Minsk, Belarus
- Clinic and Polyclinic of Nuclear Medicine, University of Wuerzburg, Wuerzburg, Germany
| | - Christoph Reiners
- The International fund “Help for patients with radiation-induced thyroid cancer “Arnica”, Minsk, Belarus
- Clinic and Polyclinic of Nuclear Medicine, University of Wuerzburg, Wuerzburg, Germany
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8
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Braganza MZ, Potischman N, Park Y, Thompson FE, Hollenbeck AR, Kitahara CM. Adolescent and mid-life diet and subsequent risk of thyroid cancer in the NIH-AARP diet and health study. Int J Cancer 2015; 137:2413-23. [PMID: 25974060 DOI: 10.1002/ijc.29600] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2014] [Accepted: 04/20/2015] [Indexed: 01/11/2023]
Abstract
Although thyroid cancer is suspected to have a nutritional etiology, prospective studies examining the relationship between diet and thyroid cancer are lacking. During 1996-1997, NIH-AARP Diet and Health Study participants, ages 51-72 years, completed a 37-item food frequency questionnaire about diet at ages 12-13 years (adolescence) and 10 years before baseline (mid-life). Over a median 10 years of follow-up, 325 individuals (143 men and 182 women) were diagnosed with thyroid cancer. Multivariable-adjusted hazard ratios (HRs) and 95% confidence intervals (CIs) were calculated for intakes of foods and food groups comparing the highest to the lowest quartiles. Adolescent intakes of chicken/turkey (HR = 1.59, 95% CI: 0.97-2.60; ptrend < 0.01) and sweet baked goods (HR = 1.59, 95% CI: 1.09-2.34; ptrend = 0.04) were positively associated with thyroid cancer risk, while intake of butter/margarine was inversely associated with risk (HR = 0.64, 95% CI: 0.44-0.91; ptrend < 0.02). Similar to adolescent diet, mid-life intake of sweet baked goods was nonsignificantly associated with an increased risk of thyroid cancer (HR = 1.39, 95% CI: 0.96-2.00; ptrend = 0.11), but intake of butter/margarine was inversely associated with risk (HR = 0.66, 95% CI: 0.46-0.95; ptrend = 0.03). Among men, higher adolescent consumption of canned tuna was positively associated with risk of thyroid cancer (HR = 1.69, 95% CI: 1.01-2.83; ptrend = 0.03), and greater mid-life intake of broccoli was associated with a twofold increased risk (HR = 2.13, 95% CI: 1.13-3.99; ptrend < 0.01). This large prospective study suggests that several components of the adolescent and mid-life diet, including iodine-rich foods and goitrogens, may influence thyroid cancer risk.
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Affiliation(s)
- Melissa Z Braganza
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Bethesda, Maryland, 20892
| | - Nancy Potischman
- Division of Cancer Control and Population Sciences, National Cancer Institute, National Institutes of Health, Bethesda, Maryland, 20892
| | - Yikyung Park
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Bethesda, Maryland, 20892.,Division of Public Health Sciences, Washington University School of Medicine, St. Louis, Missouri, 63110
| | - Frances E Thompson
- Division of Cancer Control and Population Sciences, National Cancer Institute, National Institutes of Health, Bethesda, Maryland, 20892
| | | | - Cari M Kitahara
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Bethesda, Maryland, 20892
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9
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10
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Liu ZT, Lin AH. Dietary Factors and Thyroid Cancer Risk: A Meta-Analysis of Observational Studies. Nutr Cancer 2014; 66:1165-78. [DOI: 10.1080/01635581.2014.951734] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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11
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Marcello MA, Sampaio AC, Geloneze B, Vasques ACJ, Assumpção LVM, Ward LS. Obesity and excess protein and carbohydrate consumption are risk factors for thyroid cancer. Nutr Cancer 2013; 64:1190-5. [PMID: 23163848 DOI: 10.1080/01635581.2012.721154] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Conflicting data concerning the association between obesity and differentiated thyroid cancer (DTC) may be attributed to the lack of records showing dietary intake and inadequate evaluation of nutrient composition. We evaluated 115 DTC patients carefully paired with 103 healthy control individuals by using a structured questionnaire, including a 24-h recordatory during 3 days, to investigate calorie intake and macronutrient (proteins, carbohydrates, and lipids) composition of the diet. We observed that excess weight (body mass index > 25 kg/m(2)) increased individual susceptibility to DTC [odds ratio (OR) = 3.787; 95% confidence interval (CI) = 1.115-6.814; P < 0.0001). This augmented risk was evident in women (OR = 1.925; 95% CI = 1.110-3.338; P = 0.0259) but not in men (P = 0.3498). Excess calorie intake was more frequent in patients with DTC than in controls (OR = 5.890; 95% CI = 3.124-11.103; P < 0.0001), and both excess protein (OR = 4.601; 95% CI = 1.634-12.954; P = 0.0039) and carbohydrate (OR = 4.905; 95% CI = 2.593-9.278; P < 0.0001) consumption were associated with an increased risk of DTC, contrarily to lipid/fiber intake and physical activity (P = 0.894 and 0.5932, respectively). In conclusion, our data indicate that overweight and risk of DTC are associated with higher protein and carbohydrate consumption than the rates recommended by the World Health Organization. The nutritional orientation should be part of preventive strategy targets designed to combat the increasing incidence of both obesity and DTC.
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Affiliation(s)
- Marjory Alana Marcello
- Laboratory of Cancer Molecular Genetics (Gemoca), Department of Internal Medicine, Faculty of Medical Sciences, University of Campinas, São Paulo, Brazil
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12
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Miyawaki I, Tamura A, Matsumoto I, Inada H, Kunimatsu T, Kimura J, Funabashi H. The effects of clobazam treatment in rats on the expression of genes and proteins encoding glucronosyltransferase 1A/2B (UGT1A/2B) and multidrug resistance-associated protein-2 (MRP2), and development of thyroid follicular cell hypertrophy. Toxicol Appl Pharmacol 2012; 265:351-9. [PMID: 22982618 DOI: 10.1016/j.taap.2012.09.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2012] [Revised: 09/05/2012] [Accepted: 09/06/2012] [Indexed: 11/17/2022]
Abstract
Clobazam (CLB) is known to increase hepatobiliary thyroxine (T4) clearance in Sprague-Dawley (SD) rats, which results in hypothyroidism followed by thyroid follicular cell hypertrophy. However, the mechanism of the acceleration of T4-clearance has not been fully investigated. In the present study, we tried to clarify the roles of hepatic UDP-glucronosyltransferase (UGT) isoenzymes (UGT1A and UGT2B) and efflux transporter (multidrug resistance-associated protein-2; MRP2) in the CLB-induced acceleration of T4-clearance using two mutant rat strains, UGT1A-deficient mutant (Gunn) and MRP2-deficient mutant (EHBR) rats, especially focusing on thyroid morphology, levels of circulating hormones (T4 and triiodothyronine (T3)) and thyroid-stimulating hormone (TSH), and mRNA or protein expressions of UGTs (Ugt1a1, Ugt1a6, and Ugt2b1/2) and MRP2 (Mrp). CLB induced thyroid morphological changes with increases in TSH in SD and Gunn rats, but not in EHBR rats. T4 was slightly decreased in SD and Gunn rats, and T3 was decreased in Gunn rats, whereas these hormones were maintained in EHBR rats. Hepatic Ugt1a1, Ugt1a6, Ugt2b1/2, and Mrp2 mRNAs were upregulated in SD rats. In Gunn rats, UGT1A mRNAs (Ugt1a1/6) and protein levels were quite low, but UGT2B mRNAs (Ugt2b1/2) and protein were prominently upregulated. In SD and Gunn rats, MRP2 mRNA and protein were upregulated to the same degree. These results suggest that MRP2 is an important contributor in development of the thyroid cellular hypertrophy in CLB-treated rats, and that UGT1A and UGT2B work in concert with MRP2 in the presence of MRP2 function to enable the effective elimination of thyroid hormones.
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Affiliation(s)
- Izuru Miyawaki
- Safety Research Laboratories, Dainippon Sumitomo Pharma Co., Ltd., 3-1-98, Kasugade Naka, Konohanaku, Osaka 554-0022, Japan.
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13
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Peterson E, De P, Nuttall R. BMI, diet and female reproductive factors as risks for thyroid cancer: a systematic review. PLoS One 2012; 7:e29177. [PMID: 22276106 PMCID: PMC3261873 DOI: 10.1371/journal.pone.0029177] [Citation(s) in RCA: 114] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2011] [Accepted: 11/22/2011] [Indexed: 11/29/2022] Open
Abstract
Background Thyroid cancer incidence rates have been increasing worldwide but the reason behind this is unclear. Both the increasing use of diagnostic technologies allowing the detection of thyroid cancer and a true increase in thyroid cancer incidence have been proposed. This review assesses the role of body mass index (BMI), diet, and reproductive factors on the thyroid cancer trend. Methods Epidemiologic studies of the selected risk factors up to June 2010 were reviewed and critically assessed. Results Among the thirty-seven studies reviewed and despite variation in the risk estimates, most papers supported a small but positive association for BMI (risk estimate range: 1.1–2.3 in males and 1.0–7.4 in females.). Among specific dietary components, there was no consistent association of thyroid cancer risk with iodine intake through fortification (risk estimate range: 0.49–1.6) or fish consumption (risk estimate range 0.6–2.2), nor with diets high in cruciferous vegetables (risk estimate range 0.6–1.9). A small number of studies showed a consistent protective effect of diets high in non-cruciferous vegetable (risk estimate range: 0.71–0.92). Among reproductive factors (pregnancy, parity, number of live births, use of prescription hormones, menstrual cycle regularity, and menopausal status), none were consistently associated with higher thyroid cancer risk. Conclusions BMI had the strongest link to thyroid cancer risk among those examined. Detailed examinations of population-level risk factors can help identify and support prevention efforts to reduce the burden of thyroid cancer.
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Affiliation(s)
- Emily Peterson
- University of Toronto, Dalla Lana School of Public Health, Division of Epidemiology, Toronto, Ontario, Canada
| | - Prithwish De
- University of Toronto, Dalla Lana School of Public Health, Division of Epidemiology, Toronto, Ontario, Canada
- Canadian Cancer Society, Cancer Control Policy, Toronto, Ontario, Canada
- * E-mail:
| | - Robert Nuttall
- Canadian Cancer Society, Cancer Control Policy, Toronto, Ontario, Canada
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14
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Role of dietary iodine and cruciferous vegetables in thyroid cancer: a countrywide case-control study in New Caledonia. Cancer Causes Control 2010; 21:1183-92. [PMID: 20361352 DOI: 10.1007/s10552-010-9545-2] [Citation(s) in RCA: 67] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2009] [Accepted: 03/17/2010] [Indexed: 11/27/2022]
Abstract
Exceptionally high incidence rates of thyroid cancer have been reported in New Caledonia, particularly in Melanesian women. To clarify the reasons of this elevated incidence, we conducted a countrywide population-based case-control study in the multiethnic population of Caledonian women. The study included 293 cases of thyroid cancer and 354 population controls. Based on a food frequency questionnaire, we investigated the role in thyroid cancer of food items rich in iodine-such as seafood-and of vegetables containing goitrogens-such as cruciferous vegetables. A measure of total daily iodine intake based on a food composition table was also used. Our findings provided little support for an association between thyroid cancer and consumption of fish and seafood. We found that high consumption of cruciferous vegetables was associated with thyroid cancer among women with low iodine intake (OR = 1.86; 95% CI: 1.01-3.43 for iodine intake <96 microg/day). The high consumption of cruciferous vegetables among Melanesian women, a group with mild iodine deficiency, may contribute to explain the exceptionally high incidence of thyroid cancer in this group.
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15
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Dal Maso L, Bosetti C, La Vecchia C, Franceschi S. Risk factors for thyroid cancer: an epidemiological review focused on nutritional factors. Cancer Causes Control 2008; 20:75-86. [PMID: 18766448 DOI: 10.1007/s10552-008-9219-5] [Citation(s) in RCA: 184] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2008] [Accepted: 08/11/2008] [Indexed: 10/21/2022]
Abstract
OBJECTIVES The present review summarizes epidemiological evidence on risk factors for thyroid cancer (TC), in particular, nutritional factors. METHODS Searches of articles on the issue were conducted using MEDLINE. RESULTS Exposure to ionizing radiation, particularly during childhood, is the best-established risk factor for TC. There is also a strong association with history of benign nodules/adenoma or goiter. Iodine deficiency may induce an increasing incidence of benign thyroid conditions, but very high iodine intake also affects thyroid function and, possibly, TC risk. Among dietary factors, fish-the major natural source of iodine in human diet-is not consistently related to TC risk. High intake of cruciferous vegetables shows a weak inverse association with TC. Among other food groups, vegetables other than cruciferous are the only food group showing a favorable effect on TC, with an approximate 20% reduction in risk for subjects with the highest consumption. No effect on TC risk of alcohol, coffee, or other food-groups/nutrients emerged. Height and weight at diagnosis show a moderate positive association with TC risk. CONCLUSION At present, the only recognized measures for reducing TC risk is to avoid ionizing radiation and iodine deficiency, particularly in childhood and young women, and to increase vegetable consumption.
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Affiliation(s)
- Luigino Dal Maso
- Unità di Epidemiologia e Biostatistica, Centro di Riferimento Oncologico, Via F. Gallini 2, Aviano (PN), 33081, Italy.
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16
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Kotyzová D, Eybl V, Mihaljevic M, Glattre E. Effect of long-term administration of arsenic (III) and bromine with and without selenium and iodine supplementation on the element level in the thyroid of rat. Biomed Pap Med Fac Univ Palacky Olomouc Czech Repub 2007; 149:329-33. [PMID: 16601782 DOI: 10.5507/bp.2005.052] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
The aim of this study was to evaluate the influence of arsenic and bromine exposure with or without iodine and selenium supplementation on the element level in the thyroid of rats. Four major groups of Wistar female rats were fed with respective diets: group A - standard diet, group B - iodine rich diet (10 mg I/kg food), group C - selenium rich diet (1 mg Se/kg) and group D - iodine and selenium rich diet (as in group B and C). Each group was divided into four subgroups per 7 animals each receiving either NaAsO(2) ip (6.5 mg.kg(-1) twice a week for two weeks and 3.25 mg.kg(-1) for six weeks) or KBr in drinking water (58.8 mg.l(-1)) for 8 weeks or combined administration of both substances. Remaining subgroup served as controls. After 8 weeks thyroid glands were analyzed by ICP-MS for As, Br, Se, and I content. The exposition of rat to arsenic or bromine causes the accumulation of these elements in the thyroid gland ( approximately 18 ppm of As, approximately 90 ppm of Br) and significantly affects iodine and selenium concentration in the thyroid. In iodine and/or selenium supplemented rats the bromine intake into the thyroid was lowered to approximately 50% of the level in unsupplemented animals. Also selenium thyroid level elevated due to KBr administration was lowered by iodine supplementation in the diet. The accumulation of arsenic in the thyroid was not influenced by selenium or iodine supplementation; however, As(III) administration increased iodine thyroid level and suppressed selenium thyroid level in selenium or iodine supplemented group of animals.
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Affiliation(s)
- Dana Kotyzová
- Department of Pharmacology and Toxicology, Charles University in Prague, Faculty of Medicine in Pilsen, Karlovarská 48, Pilsen, Czech Republic.
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17
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Kobayashi M, Kashida Y, Yoneda K, Iwata H, Watanabe M, Tanabe S, Fukatsu H, Machida N, Mitsumori K. Thyroid lesions and dioxin accumulation in the livers of jungle crows (Corvus macrorhynchos) in urban and suburban Tokyo. ARCHIVES OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2005; 48:424-432. [PMID: 15750778 DOI: 10.1007/s00244-004-0101-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2004] [Accepted: 08/07/2004] [Indexed: 05/24/2023]
Abstract
Wild jungle crows (Corvus macrorhynchos) captured from three different areas of Tokyo were examined to evaluate environmental contamination of dioxins. In addition to the pathologic examination of their whole body, accumulation of dioxins, mRNA expression of the aryl hydrocarbon receptor (AhR), and pentoxyresorufin-O-depenthylase (PROD) activity in the liver were determined. Marked histopathologic changes were observed in the thyroid glands, especially in the crows from the urban downtown area. Levels of dioxins and their toxic equivalents (TEQs) and AhR mRNA expression in the livers of the crows from the urban area were higher than those from the suburban area. There was a high correlation between the levels of TEQs and PROD activity. The results of the present study demonstrated that jungle crows possess AhR-mediated toxicologic pathways similar to those of mammals and suggest the possibility that the thyroidal changes observed in the adult crows from the urban areas are one of the toxic manifestations resulting from exposure to dioxins and other environmental chemicals.
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Affiliation(s)
- M Kobayashi
- Laboratory of Veterinary Pathology, Tokyo University of Agriculture and Technology, 3-5-8, Saiwai-cho, Fuchu, Tokyo, 183-8509, Japan
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Miyawaki I, Moriyasu M, Funabashi H, Yasuba M, Matsuoka N. Mechanism of clobazam-induced thyroidal oncogenesis in male rats. Toxicol Lett 2003; 145:291-301. [PMID: 14580900 DOI: 10.1016/j.toxlet.2003.08.002] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
In order to elucidate the mechanisms by which long-term treatment with clobazam (CLB), 1,5-benzodiazepine, induces thyroid follicular cell tumors in male rats, male Sprague-Dawley (SD) rats were treated orally with 400 mg/kg of CLB for up to 4 weeks, and the contribution of feedback through elevated thyroid stimulating hormone (TSH) was investigated. Measurements taken after 1, 2, and 4 weeks of treatment revealed that thyroxine (T4)-UDP-glucuronosyltransferase (T4-UDPGT) activity was higher than that of untreated animals. This change was accompanied by increase in liver weights and centrilobular hepatocyte hypertrophy. In addition, plasma total triiodothyronine (T3) and T4 levels were lower than in the untreated rats when measured after 1 week of treatment. However, a high plasma TSH level was sustained throughout the 4-week treatment. Thyroid follicular cell hypertrophy began after 1 week of treatment, followed by increased thyroid weight after 2 weeks. Clearance of exogenous [125I] T4 from the blood of treated rats, determined after 4 weeks of treatment, was significantly faster than that in untreated rats, whereas iodine uptake and organification in the thyroid glands were not affected. These results suggest that CLB increases hepatic T4-UDPGT activity leading to acceleration of T4-clearance, which results in decreased plasma thyroidal hormones followed by compensatory increase of TSH biosynthesis and secretion. Chronic high levels of TSH would exert a continuous growth pressure on the thyroid, under which hypertrophic follicular cells can ultimately progress to frank neoplasms.
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Affiliation(s)
- Izuru Miyawaki
- Safety Research Laboratories, Dainippon Pharmaceutical Co Ltd, 33-94, Enoki-cho, Suita, Osaka 564-0053, Japan.
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Chen C, Staudinger JL, Klaassen CD. Nuclear receptor, pregname X receptor, is required for induction of UDP-glucuronosyltranferases in mouse liver by pregnenolone-16 alpha-carbonitrile. Drug Metab Dispos 2003; 31:908-15. [PMID: 12814968 DOI: 10.1124/dmd.31.7.908] [Citation(s) in RCA: 91] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
The aim of this study was to determine the role of pregnane X receptor (PXR) in the induction of UDP-glucuronosyltransferases (UGTs) by pregnenolone-16 alpha-carbonitrile (PCN). Four- to six-month-old male wild-type and PXR-null mice received control or PCN-treated (1500 ppm) diet for 21 days. On day 22, livers were taken to prepare microsomes and total RNA to determine UGT activity and mRNA levels, respectively. In wild-type mice, PCN treatment significantly increased UGT activities toward bilirubin, 1-naphthol, chloramphenicol, thyroxine, and triiodothyronine. On control diet, the UGT activities toward the above substrates (except for 1-naphthol) in the PXR-null mice were significantly higher than those of wild-type mice. However, UGT activities in PXR-null mice were not increased by PCN. In agreement with the above findings, mRNA levels of mouse Ugt1a1 and Ugt1a9, which are involved in the glucuronidation of bilirubin and phenolic compounds, were increased about 100% in wild-type mice following PCN treatment, whereas the expression of Ugt1a2, 1a6, and 2b5 was not affected. In contrast, PCN treatment had no effect on the mRNA levels of these UGTs in PXR-null mice. Taken together, these results indicate that PCN treatment induces glucuronidation in mouse liver, and that PXR regulates constitutive and PCN-inducible expression of some UGTs.
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Affiliation(s)
- Chuan Chen
- Department of Pharmacology, Toxicology and Therapeutics, University of Kansas Medical Center, 3901 Rainbow Boulevard, Kansas City, KS 66160, USA
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Savli H, Sevinc A, Sari R, Ozen S, Buyukberber S, Ertas E. Occult parathyroid carcinoma in a patient with papillary thyroid carcinoma and Hashimoto's thyroiditis. J Endocrinol Invest 2001; 24:42-4. [PMID: 11227731 DOI: 10.1007/bf03343807] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A 47-year-old female patient with a previous history of right thyroid lobectomy was admitted to the hospital because of a 3 cm nodule in the thyroid gland. Hormonal evaluation showed subclinical hypothyroidism with serum levels of thyroid stimulating hormone slightly elevated to 4.4 microg/dl (normal: 0.4-4 microg/dl). Thyroid ultrasound showed diffuse irregularity of the gland and the presence of a solitary nodule (30x18 mm in diameter) localized in the left lobe. A fine needle aspiration biopsy was performed. Cytological analysis revealed papillary thyroid carcinoma and Hashimoto's thyroiditis. Total thyroidectomy was performed. During the operation, two of the parathyroid glands were detected to be hyperplastic. Histopathological examination of the thyroid and parathyroid glands revealed Hashimoto's thyroiditis with papillary thyroid carcinoma and synchronous carcinoma of the parathyroid gland. To our knowledge, this association of occult parathyroid carcinoma in a patient with papillary thyroid carcinoma and Hashimoto's thyroiditis has not been reported in the literature. Given the high prevalence of autoimmune diseases in elderly women, a random occurrence of this triad represents the most likely explanation.
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Affiliation(s)
- H Savli
- Department of Internal Medicine, Inonu University, School of Medicine, Turgut Ozal Medical Center, Malatya, Turkey
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21
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Mitsumori K, Onodera H, Takahashi M, Funakoshi T, Tamura T, Yasuhara K, Takegawa K, Takahashi M. Promoting effects of kojic acid due to serum TSH elevation resulting from reduced serum thyroid hormone levels on development of thyroid proliferative lesions in rats initiated with N-bis(2-hydroxypropyl)nitrosamine. Carcinogenesis 1999; 20:173-6. [PMID: 9934866 DOI: 10.1093/carcin/20.1.173] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
In order to examine whether kojic acid (KA) exerts a promoting effect on thyroid carcinogenesis, male F344 rats were initiated with N-bis(2-hydroxypropyl)nitrosamine (BHP; 2800 mg/kg body wt, single s.c. injection) and, starting 1 week later, received pulverized basal diet containing 2 or 0% KA for 12 weeks. Untreated control rats were given basal diet for 13 weeks. As an additional experiment, two groups without BHP initiation received basal diet or diet containing 2% KA for 20 weeks. The serum triiodothyronine (T3) and thyroxine (T4) levels were significantly decreased (half to one-third of values of the BHP alone group) and serum thyroid-stimulating hormone (TSH) was markedly increased (13-19 times higher than the values of the BHP-alone group) in the BHP + KA group at weeks 4 and 12. Similar changes in serum thyroid-related hormones were observed in the group with 2% KA alone at week 4, but not at week 20. Thyroid weights were significantly increased in the BHP + KA and KA-alone groups. Focal thyroid follicular hyperplasias and adenomas were observed in 4/5 and 3/ 5 rats in the BHP + KA group at week 4, respectively. At weeks 12, these lesions were observed in all rats in the BHP + KA group. Animals of the KA alone group showed marked diffuse hypertrophy of follicular epithelial cells at weeks 4 and 20. No changes in thyroid-related hormone levels or thyroid histopathological lesions were observed in either the BHP alone or the untreated control groups. Measurement of liver T4-uridine diphosphate glucuronosyltransferase (UDP-GT) activity at week 4 revealed no significant intergroup differences. These results suggest that thyroid proliferative lesions were induced by KA administration due to continuous serum TSH stimulation through the negative feedback mechanism of the pituitary-thyroid axis, with decreases of T3 and T4 caused by a mechanism independent of T4-UDP-GT activity.
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Affiliation(s)
- K Mitsumori
- Division of Pathology, National Institute of Health Sciences, Tokyo, Japan.
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22
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Shimo T, Mitsumori K, Takahashi M, Katayama J, Saito A, Yoshida H, Aoki Y, Onodera H, Takahashi M. Comparison of ultrastructural changes in thyrotrophs of the rat pituitary between intermittent and continuous treatments with sulfadimethoxine. Toxicol Pathol 1997; 25:177-85. [PMID: 9125776 DOI: 10.1177/019262339702500207] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
To clarify relationships between serum thyroid-stimulating hormone (TSH) levels and ultrastructural changes in thyrotrophs caused by intermittent or continuous treatments with antithyroid compound, male Fischer-344 rats initiated with N-bis(2-hydroxypropyl)nitrosamine (DHPN) were given water containing 0.1% sulfadimethoxine (SM) for 8 wk and then sacrificed (Group 1). Additional groups were examined 2 wk after withdrawal (Group 2), after 4 wk retreatment following a 2-wk withdrawal period (Group 3), and after 14 wk continuous exposure (Group 4). Control rats (Group 5) remained untreated for 8 wk after the DHPN initiation. Microscopic examination revealed hypertrophy of thyrotrophs and depletion of TSH-positive material in Groups 1, 3, and 4 but a return to normal in Group 2. Electron microscopic examination of thyrotrophs in the anterior pituitary in Groups 1, 3, and 4 revealed dilated rough endoplasmic reticulum (ER) cisternae with intracisternal dense granules as well as diminished numbers of intracytoplasmic secretory granules, these changes being most marked in Group 1 and least pronounced in Group 4. The number of intracytoplasmic secretory granules in Group 3 was much lower than in Group 4, as demonstrated by morphometric analysis. In Group 2, thyrotrophs showed dilated rough ER cisternae without intracisternal dense granules and essentially the same component of intracytoplasmic secretory granules as Group 5. The present study suggest that while prolonged continuous treatment with SM results in gradual acclimation to an increased demand for TSH, intermittent treatment elicits a persistent state of reduced TSH storage in thyrotrophs due to a continued strong feedback through the hypothalamus-pituitary-thyroid axis.
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Affiliation(s)
- T Shimo
- Research Department, Hokuriku Seiyaku Co., Ltd., Fukui, Japan
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23
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Elnour A, Liedén SA, Bourdoux P, Eltom M, Khalid S, Hambraeus L. The goitrogenic effect of two Sudanese pearl millet cultivars in rats. Nutr Res 1997. [DOI: 10.1016/s0271-5317(97)00015-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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24
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Abstract
There are many reported predisposing factors for thyroid papillary carcinoma, including genetic factors [1] previous irradiation [2,3], abnormal iodine intake [4-6], hyperthyroidism [7], pregnancy [8], and a dyshormonogenetic state [9]. However, whether there is a causative link between lymphocytic thyroiditis and thyroid papillary carcinoma remains controversial. Most reports indicating some association have suffered from methodologic problems. In particular, race, age, and sex differences in susceptibility to chronic lymphocytic thyroiditis and thyroid cancer have not been well-controlled in previous studies. We have therefore carefully evaluated previous studies and tried to determine if there is a definite relation between lymphocytic thyroiditis and thyroid papillary carcinoma histo-pathologically.
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25
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Goiter, Nodular Hyperplasia, Adenoma, and Carcinoma of the Thyroid Induced by Amitrole and Ethylenethiourea, Rat. ACTA ACUST UNITED AC 1996. [DOI: 10.1007/978-3-642-60996-1_30] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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26
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Okayasu I, Fujiwara M, Hara Y, Tanaka Y, Rose NR. Association of chronic lymphocytic thyroiditis and thyroid papillary carcinoma. A study of surgical cases among Japanese, and white and African Americans. Cancer 1995; 76:2312-8. [PMID: 8635037 DOI: 10.1002/1097-0142(19951201)76:11<2312::aid-cncr2820761120>3.0.co;2-h] [Citation(s) in RCA: 147] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
BACKGROUND An association between lymphocytic thyroiditis and thyroid papillary carcinoma is still controversial. To determine a definite statistical relation, a histopathologic study was performed on tissues from in three races, because there is a racial and age-related difference in the susceptibility to thyroiditis. METHODS The prevalence and severity of thyroiditis combined with adenomatous goiter, follicular adenoma, or papillary carcinoma was defined by examination of surgically resected materials from Japanese (626 patients), and white and African Americans (330 and 90 patients, respectively). RESULTS The prevalence of lymphocytic infiltrates, which are indicative of autoimmune thyroiditis, was significantly higher in patients with papillary carcinoma than in patients with adenomatous goiter or follicular adenoma among Japanese females (63.0%) and males (50.0%), white females (76.0%), and African American females (46.2%). Lymphocyte infiltration into the follicular adenoma or papillary carcinoma correlated with the severity of combined thyroiditis. CONCLUSION An association between chronic lymphocytic thyroiditis and papillary carcinoma was confirmed in the Japanese, and white and African American populations. The possibility of autoimmune thyroiditis as a predisposing factor for papillary thyroid carcinoma, is suggested.
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Affiliation(s)
- I Okayasu
- Department of Pathology, School of Medicine, Kitasato University, Kanagawa, Japan
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27
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Ito N, Hasegawa R, Imaida K, Hirose M, Asamoto M, Shirai T. Concepts in multistage carcinogenesis. Crit Rev Oncol Hematol 1995; 21:105-133. [PMID: 8822499 DOI: 10.1016/1040-8428(94)00169-3] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Affiliation(s)
- N Ito
- First Department of Pathology, Nagoya City University Medical School, Japan
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Shimo T, Mitsumori K, Onodera H, Takahashi M, Ueno Y, Katayama J, Saito A, Takahashi M. Effect of rat thyroid proliferative lesion development by intermittent treatment with sulfadimethoxine. Cancer Lett 1995; 96:209-18. [PMID: 7585459 DOI: 10.1016/0304-3835(95)03934-o] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
To determine whether production of thyroid proliferative lesions would be enhanced by intermittent rather than continuous treatment with a goitrogen, male F344 rats initiated with N-bis(2-hydroxypropyl)nitrosamine (DHPN, 2800 mg/kg body weight, single s.c. injection) were given water containing 0.1% sulfadimethoxine (SM) for 20 weeks (group 1) or 0.1% SM for the first 8 weeks followed by 2 cycles consisting of 2 weeks withdrawal and 4 weeks retreatment with 0.1% SM (group 2). Control rats (group 3) were untreated for 20 weeks after the DHPN initiation. Serum T3 and T4 levels were significantly decreased in groups 1 and 2 compared to group 3. Serum thyroid stimulating hormone level was significantly increased in all treated groups compared to group 3. The numbers of follicular cell hyperplasias were significantly increased in group 2 compared to group 1. BrdU labeling indices for follicular cells and hyperplasias were also significantly elevated in group 2 compared to group 1. Electron microscopic examination of thyrotrophs in the anterior pituitary in groups 1 and 2 revealed dilated rough ER cisternae with intracisternal dense granules. The number of intracytoplasmic secretory granules in group 2 was moderately decreased compared to group 1. Therefore, the results of the present study suggest that it may be possible to enhance production of thyroid neoplastic lesions by intermittent treatment.
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Affiliation(s)
- T Shimo
- Research Department, Hokuriku Seiyaku Co. Ltd., Fukui, Japan
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Mitsumori K, Onodera H, Takahashi M, Shimo T, Yasuhara K, Kitaura K, Takahashi M, Hayashi Y. Effect of thyroid stimulating hormone on the development and progression of rat thyroid follicular cell tumors. Cancer Lett 1995; 92:193-202. [PMID: 7600531 DOI: 10.1016/0304-3835(95)03777-t] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Time course changes in cell proliferative activity of thyroid focal hyperplastic and tumorous lesions as well as blood thyroid-related hormones in male F344 rats initiated with N-bis(2-hydroxypropyl)nitrosamine (DHPN: 2800 mg/kg body weight, single s.c. injection) were examined following chronic administration of 0.1% sulfadimethoxine (SM) in the drinking water for 1, 4, 8, 12 and 16 weeks and at the end of a subsequent 4-week recovery period. Serum thyroid stimulating hormone (TSH) levels increased rapidly from week 1 of SM treatment, reaching a peak at week 8, and then decreased gradually with prolongation of treatment period, although remaining significantly elevated as compared with the corresponding controls at all time points up to week 16. Follicular cell hyperplasias and adenomas of the thyroid occurred from week 4 and carcinomas from week 8. All of these lesions showed high cell proliferative activities corresponding to high serum TSH levels during the early stage, but the levels in hyperplasias and adenomas decreased rapidly with prolongation of SM treatment. After the recovery period, serum TSH levels had returned to below the normal range and cell proliferation in follicular hyperplasias and adenomas had stopped or was very low. Some carcinomas demonstrating invasive growth also showed remarkable decreases in the cell proliferative activity. The results of our study strongly suggest that a high serum TSH level plays an important role in the early stage of thyroid tumorigenesis and that some tumors exhibiting invasive growth are still dependent on TSH stimulation.
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Affiliation(s)
- K Mitsumori
- Division of Pathology, National Institute of Health Sciences, Tokyo, Japan
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30
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Shimo T, Mitsumori K, Onodera H, Yasuhara K, Takahashi M, Takahashi M, Ueno Y, Hayashi Y. Time course observation of thyroid proliferative lesions and serum TSH levels in rats treated with thiourea after DHPN initiation. Cancer Lett 1994; 85:141-9. [PMID: 7954329 DOI: 10.1016/0304-3835(94)90267-4] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Time course changes in serum TSH and quantitative data for thyroid proliferative lesions in male F344 rats administered N-bis(2-hydroxypropyl)nitrosamine (DHPN: 2000 mg/kg body weight, single s.c. injection) followed by 0.1% thiourea (TU), were assessed at weeks 1, 2, 4, 8, 12 and 16 of treatment. The serum T4 level in the TU group was markedly decreased at week 1 and remained significantly lowered throughout the experiment. Serum TSH levels, in contrast, were elevated up to a peak at around week 4 with a return to the normal range at week 12. Thyroid weights in the TU group were increased significantly in a treatment period-dependent manner. Histopathologically, marked hypertrophy of thyroid follicular cells occurred at the early stage of TU treatment. Proliferative lesions, such as hyperplasia and adenomas, occurred from weeks 2 and 4, respectively, and increased with the later treatment period. The cell proliferative activity of follicular cells, assessed by BrdU incorporation, was high until week 2, but then returned to normal. The initially appearing hyperplasias and adenomas were characterized by marked proliferation but this also greatly decreased at later stages when TSH was no longer elevated. The results of our study thus suggest that a high serum TSH level plays an important role in the early phase of thyroid tumorigenesis and 8 weeks treatment with test substances is sufficient for detection of thyroid tumor promoter potential in two-stage thyroid carcinogenesis models.
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Affiliation(s)
- T Shimo
- Division of Pathology, National Institute of Health Sciences, Tokyo, Japan
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Shimo T, Mitsumori K, Onodera H, Yasuhara K, Kitaura K, Takahashi M, Kanno J, Hayashi Y. Synergistic effects of phenobarbital and thiourea on proliferative lesions in the rat liver. Cancer Lett 1994; 81:45-52. [PMID: 8019987 DOI: 10.1016/0304-3835(94)90163-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
To evaluate the effects of phenobarbital (PB) and thiourea (TU), alone or in combination, on proliferative lesions of the liver, thyroid and lung, male F344 rats initiated with 2000 mg/kg body weight N-bis(2-hydroxypropyl) nitrosamine (DHPN) were given diet and/or drinking water containing 0% PB/TU (group 1), 1000 ppm PB (group 2), 0.1% TU (group 3) and 500 ppm PB and 0.05% TU (group 4), from weeks 2 to 20 for 19 weeks. Group 4 showed remarkable increases in the number of hepatocellular altered foci per animal, the values being superior to the averages of groups 2 and 3. The number of thyroid proliferative lesions per animal was highest in group 3 and lowest in group 2. Lung proliferative lesions were induced in all groups, but no modifying influence on their development was evident in the combined group. The present results indicate that combined administration of PB and TU exerts synergistic enhancing effects on hepatocarcinogenesis.
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Affiliation(s)
- T Shimo
- Division of Pathology, National Institute of Health Sciences, Tokyo, Japan
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Kanno J, Nemoto T, Kasuga T, Hayashi Y. Effects of a six-week exposure to excess iodide on thyroid glands of growing and nongrowing male Fischer-344 rats. Toxicol Pathol 1994; 22:23-8. [PMID: 7915429 DOI: 10.1177/019262339402200104] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
A 6-wk exposure to excess iodide intake (EII) via drinking water (260 mg potassium iodide/L) demonstrated different effects on growing (4-wk old) and nongrowing (45-wk old) male Fischer-344 rats. In growing rats, EII induced a significant increase in thyroid weight, pituitary weight, serum thyroid-stimulating hormone (TSH), and thyroxine (T4). The labeling index (LI) of thyroid follicular cells was slightly increased, although not statistically significant. Histologically, an increase in follicular cell height, an increase in colloid accumulation, and evidence of colloid absorption were noted. The effect of bovine TSH (bTSH) and protirelin tartrate (TRH-t) on LI was significantly augmented by EII. In nongrowing rats, EII induced a significant increase in thyroid weight and serum T4 but no increase in pituitary weight, serum TSH, and the LI of follicular cells. Histologically, an increase in colloid accumulation was found in small follicles. EII did not augment the effect of bTSH and TRH-t on the LI of follicular cells. This study suggests that growing rats are still susceptible to acute hypothyroidism even after 6 wk of continuous exposure to excess iodide, whereas nongrowing rats are refractory within an equivalent treatment period.
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Affiliation(s)
- J Kanno
- Department of Pathology, Faculty of Medicine, Tokyo Medical and Dental University, Japan
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Kanno J, Onodera H, Furuta K, Maekawa A, Kasuga T, Hayashi Y. Tumor-promoting effects of both iodine deficiency and iodine excess in the rat thyroid. Toxicol Pathol 1992; 20:226-35. [PMID: 1475583 DOI: 10.1177/019262339202000209] [Citation(s) in RCA: 58] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Thyroid tumor-promoting effects of iodine deficiency and iodine excess were investigated in a rodent 2-stage model to estimate an optimal iodine intake range that would not effectively promote development of thyroid neoplasia. Six-week-old male F344 rats were given a single subcutaneous injection of 2,800 mg/kg body weight N-bis(2-hydroxypropyl)-nitrosamine (DHPN) or saline vehicle, maintained on Remington's iodine-deficient diet (21 +/- 2 ng/g iodide), and supplemented with various amounts of potassium iodide up to 260 mg/liter in drinking water to generate conditions ranging from severe iodine deficiency to severe iodine excess. In DHPN-treated rats, both conditions significantly increased thyroid follicular tumorigenesis. In DHPN-untreated rats, iodine deficiency produced diffuse thyroid hyperplasia, characterized by small follicles with tall epithelium and reduced colloid, together with a decrease in thyroxine (T4) and an increase in thyroid-stimulating hormone (TSH). On the other hand, iodine excess produced colloid goiter, characterized by large follicles with flat epithelium and abundant colloid admixed with normal or small-sized follicles lined by epithelium of normal height, together with normal serum T4 and slightly decreased TSH. These effects were directly proportional to the severity of iodine deficiency or extent of iodine excess and suggest that each condition has a different thyroid tumor promotion mechanism. Iodine intakes that showed the least tumor promotion were 2.6 and 9.7 micrograms/rat/day in this study. Promoting mechanisms and the problem of statistically estimating recommended daily iodine intake range are briefly discussed.
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Affiliation(s)
- J Kanno
- Department of Pathology, Faculty of Medicine, Tokyo Medical and Dental University, Japan
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