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Grunert M, Schenke SA, Konrad A, Schütze C, Förster S, Klemenz B, Stahl AR. Thyroid scintigraphy: establishing a clinically useful normal range for 99mTc pertechnetate uptake. Nuklearmedizin 2024. [PMID: 39084345 DOI: 10.1055/a-2365-7917] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/02/2024]
Abstract
PURPOSE This study aims to establish a normal range for the thyroid uptake derived from 99mTc pertechnetate scans. In particular, variations of uptake with TSH stimulation and other factors such as urinary iodine concentration are taken into account and compared with the calculation of a raw uptake value. METHODS Clinical multicentric (center A, B and C) prospective study on 125 consecutive healthy patients undergoing thyroid scans for thyroid nodules. Normal functional thyroid status was assured by normal TSH, normal thyroid size, no thyroid antibodies and no symptoms of thyroid functional disorders. Calculations of raw Tc-uptake (uptake) and modified uptake values regarding current TSH value (uptakeTSH1), urinary iodine concentration (uptakeTSH1&uic), gland volume, age, smoking status, weight and tissue thickness ventral to the thyroid were performed. RESULTS There is a positive correlation of thyroid uptake with TSH allowing for the calculation of a normalized uptake value (uptakeTSH1). The normal range for uptakeTSH1 compares favourable to that for raw uptake in that it yields a clear distinction from thyroid functional disorders. The additional normalization for urinary iodine concentration (uptakeTSH1&uic) may even improve the distinctive power whereas further normalizations such as for gland volume, age and others are not warranted by this study. The 95% CI of uptakeTSH1 for sites A, A&B, and A&B&C were 0.21%-2.06%, 0.22%-2.38% and 0.24%-2.40%. CONCLUSION A normal range for the thyroid uptake can be established with respect to the current TSH stimulation. This normalization (uptakeTSH1) overcomes the drawback of raw uptake by yielding a clinically useful parameter with obviously high distinctive power against functional thyroid disorders.
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Affiliation(s)
- Michael Grunert
- Department of Nuclear Medicine, Bundeswehrkrankenhaus Ulm, Ulm, Germany
- Department of Nuclear Medicine, Ulm University Hospital, Ulm, Germany
| | - Simone Agnes Schenke
- Klinik und Institut für Nuklearmedizin, Klinikum Bayreuth GmbH, Bayreuth, Germany
- Nuklearmedizin, Universitätsklinikum Magdeburg, Magdeburg, Germany
| | - Andrea Konrad
- Department of Nuclear Medicine, Bundeswehrkrankenhaus Ulm, Ulm, Germany
| | - Christina Schütze
- Klinik und Institut für Nuklearmedizin, Klinikum Bayreuth GmbH, Bayreuth, Germany
| | - Stefan Förster
- Klinik und Institut für Nuklearmedizin, Klinikum Bayreuth GmbH, Bayreuth, Germany
- Medizincampus Oberfranken, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
| | - Burkhard Klemenz
- Department of Nuclear Medicine, Bundeswehrkrankenhaus Ulm, Ulm, Germany
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Meneghini V, Tebar WR, Santos IS, Janovsky CCPS, de Almeida-Pititto B, Birck MG, Lotufo PA, Goulart AC, Sgarbi JA, Teixeira PDFDS, Silva GTD, Benseñor IM. Potential Determinants of Thyroid Peroxidase Antibodies and Mortality Risk: Results From the ELSA-Brasil Study. J Clin Endocrinol Metab 2024; 109:e698-e710. [PMID: 37698138 DOI: 10.1210/clinem/dgad539] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Revised: 08/16/2023] [Accepted: 09/09/2023] [Indexed: 09/13/2023]
Abstract
CONTEXT The presence of thyroid peroxidase antibodies (TPOAbs) may be considered as an indicator of adverse health outcomes. OBJECTIVE We aimed to investigate the potential determinants of TPOAb levels and to analyze the association between TPOAb titers and the risk of all- and specific-cause mortality. METHODS Baseline and longitudinal data of 13 187 participants from the ELSA-Brasil Study were analyzed. We investigated the association of TPOAb, detectability, positivity, and persistent positivity with sociodemographic and lifestyle factors using logistic regressions. Cox proportional hazards and Fine-Gray subdistribution hazard regression analyses were used to verify the association of TPOAbs with mortality. RESULTS The determinants of TPOAb detectability and positivity were younger age, higher body mass index, female sex, and former and current smoking status. Black, mixed, and other self-reported races, intermediate and higher education, and heavy drinking were determinants of detectable and positive TPOAb levels. Female sex, White race, and former smoking were determinants of persistent TPOAb positivity at 2 visits, although only the female sex maintained its association at 3 visits. Moreover, after multivariate adjustment, there were associations between higher levels of TPOAbs and higher risk of cancer-related mortality among men, and TPOAb detectability and mortality by other causes among women. CONCLUSION Sociodemographic and lifestyle-related factors were determinants of multiple TPOAb categories. TPOAb levels were associated with mortality risk; however, the low mortality rate in this sample might have compromised this finding. We suggest further studies to explore the clinical importance of detectable TPOAb levels, not only its positivity, as a potential marker of inflammation.
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Affiliation(s)
- Vandrize Meneghini
- Center for Clinical and Epidemiological Research, Universidade de São Paulo, São Paulo, SP 05508-000, Brazil
| | - William Rodrigues Tebar
- Center for Clinical and Epidemiological Research, Universidade de São Paulo, São Paulo, SP 05508-000, Brazil
| | - Itamar Souza Santos
- Center for Clinical and Epidemiological Research, Universidade de São Paulo, São Paulo, SP 05508-000, Brazil
- Department Internal Medicine, Universidade de São Paulo, São Paulo, SP 05508-000, Brazil
| | | | - Bianca de Almeida-Pititto
- Department of Preventive Medicine, Universidade Federal de São Paulo, São Paulo, SP 04023-062, Brazil
| | - Marina Gabriela Birck
- Center for Clinical and Epidemiological Research, Universidade de São Paulo, São Paulo, SP 05508-000, Brazil
| | - Paulo Andrade Lotufo
- Center for Clinical and Epidemiological Research, Universidade de São Paulo, São Paulo, SP 05508-000, Brazil
- Department Internal Medicine, Universidade de São Paulo, São Paulo, SP 05508-000, Brazil
| | - Alessandra Carvalho Goulart
- Center for Clinical and Epidemiological Research, Universidade de São Paulo, São Paulo, SP 05508-000, Brazil
| | - José Augusto Sgarbi
- Division of Endocrinology and Metabolism, Department of Medicine, Faculdade de Medicina de Marilia, Marilia, SP 17519-030, Brazil
| | | | - Gisela Tunes da Silva
- Institute of Mathematics and Statistics, Universidade de São Paulo, São Paulo, SP 05508-090, Brazil
| | - Isabela Martins Benseñor
- Center for Clinical and Epidemiological Research, Universidade de São Paulo, São Paulo, SP 05508-000, Brazil
- Department Internal Medicine, Universidade de São Paulo, São Paulo, SP 05508-000, Brazil
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Bakar RZ, Cetin C, Yozgat CY, Kütük MS. The Effects of Maternal Smoking on Thyroid Function: Findings from Routine First-Trimester Sonographic Anomaly Screening. Z Geburtshilfe Neonatol 2023; 227:429-433. [PMID: 37758194 DOI: 10.1055/a-2165-8262] [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: 10/03/2023]
Abstract
AIM This study aimed to assess the effect of tobacco exposure on maternal thyroid function and investigate its relationship to subclinical hypothyroidism in pregnant women during the first trimester. SUBJECTS AND METHOD A comparison of maternal thyroid function was made on 45 smokers, who composed the study group, and 72 non-smokers, pregnant women, who constituted the control group. After determining smokers by questionnaire, carbon monoxide (CO) levels in the expiratory air of the participants in both groups were measured and recorded, and the smokers' exposure was objectively confirmed. RESULTS Smoking and non-smoking pregnant women were similar regarding body mass index (BMI). While the TSH and fT4 levels were respectively 1.48 mlU/L and 11.43 pmol/L in pregnant women who smoked, that ratio changed to 1.72 mlU/L and 11.17 pmol/L in the non-smokers' group. But the differences between the groups were not statistically significant (p=0.239, p=0.179). Even though the rate of subclinical hypothyroidism was 8.9% in the smoking group, it was approximately 19.4% in the non-smoker group; the difference was not statistically significant (p=0.187). CONCLUSION This study proved that there is no statistically significant difference between maternal serum TSH and fT4 levels and the rate of subclinical hypothyroidism in smokers during pregnancy in the first trimester.
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Affiliation(s)
- Rabia Zehra Bakar
- Obstetrics and Gynecology, Bezmialem Vakif University, Istanbul, Turkey
| | - Caglar Cetin
- Obstetrics and Gynecology, Bezmialem Vakif University, Istanbul, Turkey
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Kun Y, Xiaodong W, Haijun W, Xiazi N, Dai Q. Exploring the oral-gut microbiota during thyroid cancer: Factors affecting the thyroid functions and cancer development. Food Sci Nutr 2023; 11:5657-5674. [PMID: 37823092 PMCID: PMC10563736 DOI: 10.1002/fsn3.3538] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2023] [Revised: 05/29/2023] [Accepted: 06/19/2023] [Indexed: 10/13/2023] Open
Abstract
Thyroid cancer (TC) is categorized into papillary, follicular, medullary, and anaplastic. The TC is increasing in several countries, including China, the United States, the United Kingdom, Canada, France, Australia, Germany, Japan, Spain, and Italy. Thus, this review comprehensively covers the factors that affect thyroid gland function, TC types, risk factors, and symptoms. Lifestyle factors (such as nutrient consumption and smoking) and pollutants (such as chemicals and heavy metals) increased the thyroid-stimulating hormone (TSH) levels which are directly related to TC prevalence. The conventional and recent TC treatments are also highlighted. The role of the oral and gut microbiota as well as the application of probiotics on TC are also discussed. The variations in the composition of oral and gut microbes influence the thyroid function indirectly through alteration in metabolites (such as short-chain fatty acids) that are eminent for cellular energy metabolism. Maintenance of healthy gut and oral microbiota can help in regulating thyroid function by regulating iodine uptake. Oral or gut microbial dysbiosis can be considered as an early diagnosis factor or TC marker. High TSH during TC can increase the oral microbial diversity while disrupting the high ratio of Firmicutes and Bacteroidetes in the gut. Supplementation of probiotics as an adjuvant in TC treatment is beneficial. However, needs more extensive research to explore the direct effect of probiotics on thyroid function.
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Affiliation(s)
- Yao Kun
- Department of Nuclear MedicineGansu Provincial HospitalLanzhouChina
| | - Wei Xiaodong
- Emergency Department of Gansu Provincial HospitalLanzhouChina
| | - Wang Haijun
- Department of Nuclear MedicineGansu Provincial HospitalLanzhouChina
| | - Nie Xiazi
- Department of GynecologyGansu Provincial HospitalLanzhouChina
| | - Qiang Dai
- Department of RespiratoryGansu Provincial HospitalLanzhouChina
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Lee F, Gallo MV, Schell LM, Jennings J, Lawrence DA, On The Environment ATF. Exposure of Akwesasne Mohawk women to polychlorinated biphenyls and hexachlorobenzene is associated with increased serum levels of thyroid peroxidase autoantibodies. JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH. PART A 2023; 86:597-613. [PMID: 37335069 DOI: 10.1080/15287394.2023.2226685] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/21/2023]
Abstract
Persistent organic pollutants (POPs) including polychlorinated biphenyls (PCBs), hexachlorobenzene (HCB), and dichlorodiphenyltrichloroethane (p,p'-DDT) were reported to influence immunological activity. As endocrine-disrupting chemicals (EDC), these pollutants may disrupt normal thyroid function and act as catalysts for development of autoimmune thyroid disease by directly and indirectly affecting levels of thyroid peroxidase antibodies (TPOAbs). Native American communities are disproportionately exposed to harmful toxicants and are at an increased risk of developing an autoimmune disease. The aim of this study was to determine the association between POPs and TPOAbs in serum obtained from Native American women. This assessment was used to measure whether increased risk of autoimmune thyroid disease occurred as a result of exposure to POPs. Data were collected from 183 Akwesasne Mohawk women, 21-38 years of age, between 2009 and 2013. Multivariate analyses were conducted to determine the association between toxicant exposure and levels of TPOAbs. In multiple logistic regression analyses, exposure to PCB congener 33 was related to elevated risk of individuals possessing above normal levels of TPOAbs. Further, HCB was associated with more than 2-fold higher risk of possessing above normal levels of TPOAbs compared to women with normal levels of TPOAbs. p,p'-DDE was not associated with TPOAb levels within this study. Exposure to PCB congener 33 and HCB was correlated with above normal levels of TPOAbs, a marker of autoimmune thyroid disease. Additional investigations are needed to establish the causes and factors surrounding autoimmune thyroid disease which are multiple and complex.
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Affiliation(s)
- Florence Lee
- Department of Anthropology, University at Albany, Albany, NY, USA
| | - Mia V Gallo
- Department of Anthropology, University at Albany, Albany, NY, USA
- Center for the Elimination of Minority Health Disparities, University at Albany, Albany, NY, USA
| | - Lawrence M Schell
- Department of Anthropology, University at Albany, Albany, NY, USA
- Center for the Elimination of Minority Health Disparities, University at Albany, Albany, NY, USA
- Department of Epidemiology and Biostatistics, University at Albany, Albany, NY, USA
| | - Julia Jennings
- Department of Anthropology, University at Albany, Albany, NY, USA
| | - David A Lawrence
- Wadsworth Center/New York State Department of Health, Albany, NY, USA
- Biomedical Sciences and Environmental Health Sciences, University at Albany, Albany, NY, USA
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Liem JF, Subekti I, Mansyur M, Soemarko DS, Kekalih A, Suyatna FD, Suryandari DA, Malik SG, Pangaribuan B. The determinants of thyroid function among vegetable farmers with primary exposure to chlorpyrifos: A cross-sectional study in Central Java, Indonesia. Heliyon 2023; 9:e16435. [PMID: 37251483 PMCID: PMC10220374 DOI: 10.1016/j.heliyon.2023.e16435] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2022] [Revised: 04/20/2023] [Accepted: 05/16/2023] [Indexed: 05/31/2023] Open
Abstract
Objectives Occupational pesticide exposure, chlorpyrifos (CPF) in particular, may adversely affect the thyroid. The purpose of this study was to evaluate the determinants of thyroid function as indicated by the serum concentration of thyroid-stimulating hormone (TSH) among Indonesian vegetable farmers with primary exposure to CPF. Methods A total of 151 vegetable farmers participated in this study. The sociodemographic and occupational characteristics of the participants were obtained using a structured interviewer-administered questionnaire. A validated quantitative method was used to estimate the cumulative exposure level (CEL). Serum TSH, thyroglobulin (Tg), free thyroxine (FT4), and urinary iodine excretion (UIE) were measured in the laboratory. The difference in TSH concentrations according to CEL and other characteristics were analysed using the Mann-Whitney U test. A multiple linear regression model was used to evaluate the potential determinants of TSH. Results The mean age was 50 (SD 9.4) years. The median concentrations of TSH, FT4, and Tg/FT4 ratio were 1.46 mIU/L, 1.17 ng/dL, and 6.23 × 102, respectively. We observed that higher TSH concentrations were found among those with a higher Tg/FT4 ratio, were classified as high CEL, and had lower UIE or FT4. Conclusions Our findings show that Tg/FT4 ratio, CEL, FT4, UIE concentrations, and post-spraying days were determinants of TSH concentrations among farmers with primary exposure to CPF. These results indicate that farmers are exposed to agents with thyroid-disrupting properties, thus supporting previous evidence showing the potential for thyroid disorders in agricultural populations exposed to pesticides.
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Affiliation(s)
- Jen Fuk Liem
- Department of Occupational Health and Safety, Faculty of Medicine and Health Sciences, Universitas Kristen Krida Wacana, Kota Jakarta Barat, DKI Jakarta, Indonesia
- Doctoral Program, Faculty of Medicine Universitas Indonesia, Kota Jakarta Pusat, DKI Jakarta, Indonesia
| | - Imam Subekti
- Department of Internal Medicine, Faculty of Medicine Universitas Indonesia, Dr. Cipto Mangunkusumo General Hospital, Kota Jakarta Pusat, DKI Jakarta, Indonesia
| | - Muchtaruddin Mansyur
- Community Medicine Department, Faculty of Medicine Universitas Indonesia, Kota Jakarta Pusat, DKI Jakarta, Indonesia
| | - Dewi S. Soemarko
- Community Medicine Department, Faculty of Medicine Universitas Indonesia, Kota Jakarta Pusat, DKI Jakarta, Indonesia
| | - Aria Kekalih
- Community Medicine Department, Faculty of Medicine Universitas Indonesia, Kota Jakarta Pusat, DKI Jakarta, Indonesia
| | - Franciscus D. Suyatna
- Department of Pharmacology and Therapeutics, Faculty of Medicine Universitas Indonesia, Kota Jakarta Pusat, DKI Jakarta, Indonesia
| | - Dwi A. Suryandari
- Department of Biology, Faculty of Medicine Universitas Indonesia, Kota Jakarta Pusat, DKI Jakarta, Indonesia
| | - Safarina G. Malik
- Eijkman Institute for Molecular Biology, National Research and Innovation Agency, Kota Jakarta Pusat, DKI Jakarta, Indonesia
| | - Bertha Pangaribuan
- Prodia Occupational Health Indonesia, Kota Jakarta Pusat, DKI Jakarta, Indonesia
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Pinto S, Croce L, Carlier L, Cosson E, Rotondi M. Thyroid dysfunction during gestation and gestational diabetes mellitus: a complex relationship. J Endocrinol Invest 2023:10.1007/s40618-023-02079-3. [PMID: 37024642 PMCID: PMC10372128 DOI: 10.1007/s40618-023-02079-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/04/2023] [Accepted: 03/24/2023] [Indexed: 04/08/2023]
Abstract
PURPOSE Gestational diabetes mellitus (GDM) and thyroid dysfunction during gestation (GTD) are the two most prevalent endocrinopathies during pregnancy. The aim of the present review is to provide an overview of the peculiar aspects of GDM and GTD, to highlight the potential interactions and clinical consequences of these two frequent clinical conditions. METHODS A literature review regarding GDM and GTD was carried out with particular interest on meta-analyses and human studies dealing with the (i) shared risk factors between GDM and GTD, (ii) the epidemiological link between GTD and GDM, (iii) physiopathologic link between GTD and GDM, (iv) clinical consequences of GDM and GTD, and (v) post-partum implications of GDM and GTD. RESULTS The association between GDM and GTD is common and may be explained by the insulin-resistance state due to maternal GTD, to alterations in the placentation process or to the many shared risk factors. Discrepant results of epidemiologic studies can be explained, at least in part, by the changes in diagnostic criteria and screening strategies throughout the years for both conditions. GDM and GTD impact pregnancy outcome and have post-partum long-term consequences, but more studies are needed to prove an additional adverse effect. CONCLUSIONS Based on the epidemiological and physio-pathological link between GDM and GTD, it could be suggested that a diagnosis of GTD could lead to screen GDM and the other way round.
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Affiliation(s)
- S Pinto
- AP-HP, Department of Endocrinology-Diabetology-Nutrition, Avicenne Hospital, Université Paris 13, Sorbonne Paris Cité, CRNH-IdF, CINFO, Bobigny, France
- AP-HP, Ambulatory Unit of Endocrinology-Diabetology-Nutrition, Jean Verdier Hospital, Université Paris 13, Sorbonne Paris Cité, CRNH-IdF, CINFO, Bondy, France
| | - L Croce
- Department of Internal Medicine and Therapeutics, University of Pavia, 27100, Pavia, PV, Italy
- Unit of Endocrinology and Metabolism, Laboratory for Endocrine Disruptors, Istituti Clinici Scientifici Maugeri IRCCS, Department of Internal Medicine and Therapeutics, University of Pavia, Via S. Maugeri 4, 27100, Pavia, PV, Italy
- NBFC, National Biodiversity Future Center, 90133, Palermo, PA, Italy
| | - L Carlier
- AP-HP, Ambulatory Unit of Endocrinology-Diabetology-Nutrition, Jean Verdier Hospital, Université Paris 13, Sorbonne Paris Cité, CRNH-IdF, CINFO, Bondy, France
| | - E Cosson
- AP-HP, Department of Endocrinology-Diabetology-Nutrition, Avicenne Hospital, Université Paris 13, Sorbonne Paris Cité, CRNH-IdF, CINFO, Bobigny, France
- UMR U1153 INSERM/U11125 INRA/CNAM/Université Paris 13, Unité de Recherche Epidémiologique Nutritionnelle, Bobigny, France
| | - M Rotondi
- Department of Internal Medicine and Therapeutics, University of Pavia, 27100, Pavia, PV, Italy.
- Unit of Endocrinology and Metabolism, Laboratory for Endocrine Disruptors, Istituti Clinici Scientifici Maugeri IRCCS, Department of Internal Medicine and Therapeutics, University of Pavia, Via S. Maugeri 4, 27100, Pavia, PV, Italy.
- NBFC, National Biodiversity Future Center, 90133, Palermo, PA, Italy.
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Ghanooni AH, Zadeh-Vakili A, Rezvankhah B, Jafari Nodushan S, Akbarzadeh M, Amouzegar A, Daneshpour MS, Khalili D, Mehrabi Y, Ebadi SA, Azizi F. Longitudinal Associations Between TPO Gene Variants and Thyroid Peroxidase Antibody Seroconversion in a Population-Based Study: Tehran Thyroid Study. Genet Test Mol Biomarkers 2023; 27:65-73. [PMID: 36989526 DOI: 10.1089/gtmb.2022.0122] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/31/2023] Open
Abstract
Introduction: Autoimmune thyroid diseases (AITD) are usually accompanied by anti-thyroid antibodies which can serve as early predictive markers. This study was designed to investigate the relationship between thyroid peroxidase (TPO) gene variants and the presence of TPOAb and to evaluate the effect of environmental factors associated with seroconversion from TPOAb-negative to TPOAb-positive. Methods: Participants from phases 1 and 2 of the Tehran Thyroid Study in (n = 5327, ≥20 years) were evaluated in terms of TPOAb positivity, and its relationship with 53 single nucleotide polymorphisms (SNPs) from within the TPO gene (cross-sectional approach). TPOAb-negative participants (n = 4815) were followed up for seroconversion for 5.5 years. The relationship between the TPO gene variants and the TPOAb seroconversion was evaluated (longitudinal approach). Results: There were 521 TPOAb-positive participants in the cross-sectional phase and 266 new TPOAb-positive cases observed during the follow-up period. After quality control (Hardy-Weinberg equilibrium (p < 1 × 10-5) and minor allele frequency < 0.05), 49 SNPs were qualified for association analyses. From this set fourteen SNPs were identified that were associated with TPOAb positivity. rs6605278, located in the 3'UTR TPO gene, was the most highly significantly associated of the variant and remained associated after adjustment for age, gender, body mass index (BMI), smoking, number of parity, and oral contraceptive consumption in both cross-sectional and longitudinal analyses (p < 0.05). Conclusions: TPOAb-positivity can be partially explained by variants in the TPO gene. New TPOAb-associated SNPs were observed in Iranians as an ethnically diverse population.
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Affiliation(s)
- Amir Hossein Ghanooni
- Endocrine Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Azita Zadeh-Vakili
- Endocrine Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Boshra Rezvankhah
- Endocrine Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Somayeh Jafari Nodushan
- Endocrine Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mahdi Akbarzadeh
- Cellular and Molecular Endocrine Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Atieh Amouzegar
- Endocrine Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Maryam S Daneshpour
- Cellular and Molecular Endocrine Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Davood Khalili
- Department of Biostatistics and Epidemiology, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Yadollah Mehrabi
- Department of Biostatistics and Epidemiology, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Seyed Alireza Ebadi
- Department of Internal Medicine, Faculty of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Fereidoun Azizi
- Endocrine Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
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Rehan M, Zargar UR, Sheikh IA, Alharthy SA, Almashjary MN, Abuzenadah AM, Beg MA. Potential Disruption of Systemic Hormone Transport by Tobacco Alkaloids Using Computational Approaches. TOXICS 2022; 10:toxics10120727. [PMID: 36548560 PMCID: PMC9784225 DOI: 10.3390/toxics10120727] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2022] [Revised: 11/20/2022] [Accepted: 11/24/2022] [Indexed: 06/12/2023]
Abstract
Tobacco/nicotine is one of the most toxic and addictive substances and continues to pose a significant threat to global public health. The harmful effects of smoking/nicotine affect every system in the human body. Nicotine has been associated with effects on endocrine homeostasis in humans such as the imbalance of gonadal steroid hormones, adrenal corticosteroid hormones, and thyroid hormones. The present study was conducted to characterize the structural binding interactions of nicotine and its three important metabolites, cotinine, trans-3'-hydroxycotinine, and 5'-hydroxycotinine, against circulatory hormone carrier proteins, i.e., sex-hormone-binding globulin (SHBG), corticosteroid-binding globulin (CBG), and thyroxine-binding globulin (TBG). Nicotine and its metabolites formed nonbonded contacts and/or hydrogen bonds with amino acid residues of the carrier proteins. For SHBG, Phe-67 and Met-139 were the most important amino acid residues for nicotine ligand binding showing the maximum number of interactions and maximum loss in ASA. For CBG, Trp-371 and Asn-264 were the most important amino acid residues, and for TBG, Ser-23, Leu-269, Lys-270, Asn-273, and Arg-381 were the most important amino acid residues. Most of the amino acid residues of carrier proteins interacting with nicotine ligands showed a commonality with the interacting residues for the native ligands of the proteins. Taken together, the results suggested that nicotine and its three metabolites competed with native ligands for binding to their carrier proteins. Thus, nicotine and its three metabolites may potentially interfere with the binding of testosterone, estradiol, cortisol, progesterone, thyroxine, and triiodothyronine to their carrier proteins and result in the disbalance of their transport and homeostasis in the blood circulation.
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Affiliation(s)
- Mohd Rehan
- King Fahd Medical Research Center, King Abdulaziz University, Jeddah 21589, Saudi Arabia
- Department of Medical Laboratory Technology, Faculty of Applied Medical Sciences, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Ummer R. Zargar
- Department of Zoology, Government Degree College, Anantnag 192101, Kashmir, India
| | - Ishfaq A. Sheikh
- Department of Medical Laboratory Technology, Faculty of Applied Medical Sciences, King Abdulaziz University, Jeddah 21589, Saudi Arabia
- Reproductive Biology Laboratory, King Fahd Medical Research Center, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Saif A. Alharthy
- Department of Medical Laboratory Technology, Faculty of Applied Medical Sciences, King Abdulaziz University, Jeddah 21589, Saudi Arabia
- Toxicology and Forensic Sciences Unit, King Fahd Medical Research Center, King Abdulaziz University, Jeddah 21589, Saudi Arabia
- Animal House Unit, King Fahd Medical Research Center, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Majed N. Almashjary
- Department of Medical Laboratory Technology, Faculty of Applied Medical Sciences, King Abdulaziz University, Jeddah 21589, Saudi Arabia
- Animal House Unit, King Fahd Medical Research Center, King Abdulaziz University, Jeddah 21589, Saudi Arabia
- Hematology Research Unit, King Fahd Medical Research Center, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Adel M. Abuzenadah
- King Fahd Medical Research Center, King Abdulaziz University, Jeddah 21589, Saudi Arabia
- Department of Medical Laboratory Technology, Faculty of Applied Medical Sciences, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Mohd A. Beg
- Department of Medical Laboratory Technology, Faculty of Applied Medical Sciences, King Abdulaziz University, Jeddah 21589, Saudi Arabia
- Reproductive Biology Laboratory, King Fahd Medical Research Center, King Abdulaziz University, Jeddah 21589, Saudi Arabia
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Ogunsina K, Koru-Sengul T, Rodriguez V, Caban-Martinez AJ, Solle NS, Ahn S, Kobetz-Kerman EN, Lee DJ. Correlates of positive thyroid peroxidase antibodies among firefighters: A cross-sectional-study. J Endocr Soc 2022; 6:bvac125. [PMID: 36111276 PMCID: PMC9469922 DOI: 10.1210/jendso/bvac125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Indexed: 11/19/2022] Open
Abstract
Context Exposure to endocrine disrupting chemicals (EDCs) are associated with underactive thyroid glands, and possibly autoimmunity. Firefighters are exposed to EDCs from flame retardants; however, the prevalence and risk factor associations of thyroid antibodies among firefighters are unknown. Context We aimed to determine the prevalence of thyroid peroxidase antibodies (TPOAb) and associated sociodemographic and occupational risk factors among firefighters. Methods Firefighters attending professional health and safety conferences between November 2018 and January 2020, and with no prior diagnosis of thyroid disease were invited (n = 278) to submit a health survey, blood samples, and complete a thyroid ultrasound. The survey assessed for sociodemographic and occupational characteristics, including a history of familial thyroid disease, smoking, firefighter tenure, and job rank, radiation exposure, and mitigation practices of occupational exposures. Serum thyroid peroxidase antibody (TPOAb) was also assessed. Results Approximately 39.9% of firefighters evaluated had a positive TPOAb test. The mean age for those TPOAb positive was lower than those who tested negative (41.4 ± 7.9 vs 43.1 ± 7.9 years, P = 0.07) but this difference was not significant. Firefighters with a family history of thyroid disease had a statistically significant higher prevalence of TPOAb compared with those without a family history (60.0% vs 37.5%, P = 0.02); this association remained significant after adjusting for sociodemographic and occupational factors (odds ratio 2.99; CI, 1.31-6.85). Conclusion The prevalence of TPOAb is high among firefighters in our study, and family history is a significant determinant of testing positive for TPOAb. Firefighters may benefit from TPOAb and thyroid stimulating hormone tests, and screening for family history of thyroid disease at baseline employee medical check-ups. This finding suggests the need for further studies.
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Affiliation(s)
- Kemi Ogunsina
- Department of Public Health Sciences, Leonard M. Miller School of Medicine University of Miami, Miami , FL, USA
- Sylvester Comprehensive Cancer Center, Leonard M. Miller School of Medicine University of Miami, Miami , FL, USA
| | - Tulay Koru-Sengul
- Department of Public Health Sciences, Leonard M. Miller School of Medicine University of Miami, Miami , FL, USA
- Sylvester Comprehensive Cancer Center, Leonard M. Miller School of Medicine University of Miami, Miami , FL, USA
| | - Valentina Rodriguez
- Division of Endocrinology, Diabetes, and Metabolism, Department of Medicine Leonard M. Miller School of Medicine University of Miami, Miami , FL, USA
| | - Alberto J Caban-Martinez
- Department of Public Health Sciences, Leonard M. Miller School of Medicine University of Miami, Miami , FL, USA
- Sylvester Comprehensive Cancer Center, Leonard M. Miller School of Medicine University of Miami, Miami , FL, USA
| | - Natasha Schaefer Solle
- Department of Medicine Leonard M. Miller School of Medicine University of Miami, Miami , FL, USA
- Sylvester Comprehensive Cancer Center, Leonard M. Miller School of Medicine University of Miami, Miami , FL, USA
| | - Soyeon Ahn
- Department of Educational and Psychological Studies, School of Education and Human Development University of Miami, Miami , FL, USA
| | - Erin N Kobetz-Kerman
- Department of Public Health Sciences, Leonard M. Miller School of Medicine University of Miami, Miami , FL, USA
- Department of Medicine Leonard M. Miller School of Medicine University of Miami, Miami , FL, USA
- Sylvester Comprehensive Cancer Center, Leonard M. Miller School of Medicine University of Miami, Miami , FL, USA
| | - David J Lee
- Department of Public Health Sciences, Leonard M. Miller School of Medicine University of Miami, Miami , FL, USA
- Sylvester Comprehensive Cancer Center, Leonard M. Miller School of Medicine University of Miami, Miami , FL, USA
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11
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Korevaar TIM. Euthyroid Thyroperoxidase Antibody Positivity during Pregnancy, to Treat or Not to Treat? Endocrinol Metab (Seoul) 2022; 37:387-391. [PMID: 35798546 PMCID: PMC9262680 DOI: 10.3803/enm.2022.301] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Accepted: 06/11/2022] [Indexed: 11/23/2022] Open
Abstract
Thyroperoxidase antibody (TPOAb) positivity is a well-known risk factor for thyroid dysfunction during pregnancy and is associated with a suboptimal response to thyroidal stimulation by human chorionic gonadotropin. About 75% of TPOAb positive women are euthyroid and there seems to be a higher risk of predominantly miscarriage and preterm birth in this subgroup. Nonetheless, clinical decision making with regards to gestational levothyroxine treatment remains difficult due to a lack of large randomized trials. Future studies assessing dose-dependent associations and additional biomarkers that can distinguish low-risk from high-risk individuals will be key in disentangling the crude clinical data.
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Affiliation(s)
- Tim I. M. Korevaar
- Academic Center for Thyroid Diseases, Department of Internal Medicine, Erasmus University Medical Center, Rotterdam, the Netherlands
- Corresponding author: Tim I. M. Korevaar Academic Center for Thyroid Diseases, Department of Internal Medicine, Erasmus University Medical Center, Room Rg5, Doctor Molewaterplein 40, 3015 GD Rotterdam, the Netherlands Tel: +31-10-704-0-704, E-mail:
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12
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Rahman ST, Pandeya N, Neale RE, McLeod DSA, Baade PD, Youl PH, Allison R, Leonard S, Jordan SJ. Tobacco smoking and risk of thyroid cancer according to BRAF V600E mutational subtypes. Clin Endocrinol (Oxf) 2021; 95:891-900. [PMID: 34170568 DOI: 10.1111/cen.14545] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/18/2021] [Revised: 06/04/2021] [Accepted: 06/06/2021] [Indexed: 11/29/2022]
Abstract
OBJECTIVE Smoking has been associated with a reduced risk of thyroid cancer, but whether the association varies between higher- and lower-risk cancers remains unclear. We aimed to assess the association between smoking and risk of thyroid cancer overall as well as by tumour BRAF mutational status as a marker of potentially higher-risk cancer. DESIGN AND PATIENTS We recruited 1013 people diagnosed with thyroid cancer and 1057 population controls frequency-matched on age and sex. METHODS Multivariable logistic regression was used to assess the association overall and in analyses stratified by tumour characteristics. We used sensitivity analysis to assess the potential for selection bias. RESULTS We found little evidence of an association with current smoking (odds ratio [OR] = 0.93; 95% confidence interval [CI]: 0.69-1.26; current vs. never smoking), but a higher number of pack-years of smoking was associated with a lower risk of thyroid cancer (OR = 0.75; 95% CI: 0.57-0.99; ≥20 pack-years vs. never). However, after correcting for potential selection bias, we observed a statistically significant inverse association between current smoking and risk of thyroid cancer (bias-corrected OR = 0.65; 95% CI: 0.51-0.83). Those with BRAF-positive cancers were less likely to be current smokers than those with BRAF-negative cancers (prevalence ratio: 0.79; 95% CI: 0.62-0.99). CONCLUSION We found smoking was inversely related to thyroid cancer risk and, in particular, current smoking was associated with a reduced risk of potentially more aggressive BRAF-positive than the likely more indolent BRAF-negative papillary thyroid cancers.
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Affiliation(s)
- Sabbir T Rahman
- Department of Population Health, QIMR Berghofer Medical Research Institute, Brisbane, Queensland, Australia
- School of Public Health, The University of Queensland, Brisbane, Queensland, Australia
- Department of Statistics, Shahjalal University of Science and Technology, Sylhet, Bangladesh
| | - Nirmala Pandeya
- Department of Population Health, QIMR Berghofer Medical Research Institute, Brisbane, Queensland, Australia
- School of Public Health, The University of Queensland, Brisbane, Queensland, Australia
| | - Rachel E Neale
- Department of Population Health, QIMR Berghofer Medical Research Institute, Brisbane, Queensland, Australia
- School of Public Health, The University of Queensland, Brisbane, Queensland, Australia
| | - Donald S A McLeod
- Department of Population Health, QIMR Berghofer Medical Research Institute, Brisbane, Queensland, Australia
- Department of Endocrinology and Diabetes, Royal Brisbane and Women's Hospital, Brisbane, Queensland, Australia
| | - Peter D Baade
- Cancer Council Queensland, Brisbane, Queensland, Australia
- Menzies Health Institute, Griffith University, Southport, Queensland, Australia
| | - Philippa H Youl
- Cancer Alliance Queensland, Metro South Hospital and Health Service, Woolloongabba, Queensland, Australia
| | - Roger Allison
- Cancer Care Services, Royal Brisbane and Women's Hospital, Brisbane, Queensland, Australia
| | - Susan Leonard
- Cancer Care Services, Royal Brisbane and Women's Hospital, Brisbane, Queensland, Australia
| | - Susan J Jordan
- Department of Population Health, QIMR Berghofer Medical Research Institute, Brisbane, Queensland, Australia
- School of Public Health, The University of Queensland, Brisbane, Queensland, Australia
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13
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Benseñor IM, Janovsky CCPS, Goulart AC, de Souza Santos I, de Fátima Haueisen Sander Diniz M, de Almeida-Pititto B, Sgarbi JA, Lotufo PA. Incidence of TPOAb over a 4-year follow-up period: results from the Brazilian Longitudinal Study of Adult Health (ELSA-Brasil). ARCHIVES OF ENDOCRINOLOGY AND METABOLISM 2021; 65:832-840. [PMID: 34762792 PMCID: PMC10065385 DOI: 10.20945/2359-3997000000422] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Objective Although some previous data have suggested a high iodine intake in Brazil, the prevalence of antithyroperoxidase antibodies (TPOAb) in the country is compatible with rates from countries with adequate iodine intake. This observation emphasizes the importance of knowing the incidence of TPOAb in Brazil. Methods This prospective analysis included euthyroid participants with negative TPOAb at baseline and a thyroid function assessment at a 4-year follow-up. TPOAb was measured by electrochemiluminescence and considered positive when titers were ≥34 IU/mL. TSH and free T4 (FT4) levels were determined by a third-generation immunoenzymatic assay. The incidence of TPOAb is expressed in percentage per year or as a cumulative incidence within the 4-year follow-up period. Results Of 8,922 euthyroid participants (mean age 51.1 years; 50.9% women) with a negative TPOAb test at baseline, 130 presented incident TPOAb at the 4-year follow-up, yielding an annual incidence of TPOAb of 0.38%/year (95% confidence interval [95% CI], 0.37-0.39%/year) and a cumulative incidence over 4 years of 1.46% (95% CI, 1.21-1.71%). In men, the annual incidence was 0.32% (95% CI, 0.31-0.33%), and the cumulative incidence over 4 years was 1.23% (95% CI, 0.90-1.56%). In women, the annual incidence was 0.43%/year (95% CI, 0.42-0.44%/year) and the cumulative incidence over 4 years was 1.67% (95% CI, 1.30-2.04%). The only factor associated with incident TPOAb was the occurrence of thyroid diseases at follow-up. No differences in TPOAb incidence were detected across ELSA-Brasil research centers. Conclusion Based on the results of this study, the incidence of TPOAb per year and at a 4-year follow-up period are compatible with those of a country with adequate iodine intake.
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Affiliation(s)
- Isabela M Benseñor
- Centro de Pesquisa Clínica e Epidemiológica, Hospital Universitário, Divisão de Clínica Médica, Universidade de São Paulo, São Paulo, SP, Brasil
| | - Carolina Castro Porto Silva Janovsky
- Centro de Pesquisa Clínica e Epidemiológica, Hospital Universitário, Divisão de Clínica Médica, Universidade de São Paulo, São Paulo, SP, Brasil
| | - Alessandra C Goulart
- Centro de Pesquisa Clínica e Epidemiológica, Hospital Universitário, Divisão de Clínica Médica, Universidade de São Paulo, São Paulo, SP, Brasil
| | - Itamar de Souza Santos
- Centro de Pesquisa Clínica e Epidemiológica, Hospital Universitário, Divisão de Clínica Médica, Universidade de São Paulo, São Paulo, SP, Brasil
| | | | - Bianca de Almeida-Pititto
- Departamento de Epidemiologia, Faculdade de Saúde Pública, Universidade de São Paulo, São Paulo, SP, Brasil
| | - José Augusto Sgarbi
- Unidade de Tireoide, Divisão de Endocrinologia e Metabolismo, Departamento de Medicina, Faculdade de Medicina de Marília, Marília, SP, Brasil
| | - Paulo A Lotufo
- Centro de Pesquisa Clínica e Epidemiológica, Hospital Universitário, Divisão de Clínica Médica, Universidade de São Paulo, São Paulo, SP, Brasil
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14
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Pan B, Zhang Q, Zhou H, Ma ZF. Prevalence of Components of Metabolic Syndrome Among Adults with the Presence of Autoimmune Thyroid Condition in an Iodine-Sufficient Region. Biol Trace Elem Res 2021; 199:2837-2843. [PMID: 33006706 DOI: 10.1007/s12011-020-02413-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/14/2020] [Accepted: 09/28/2020] [Indexed: 12/14/2022]
Abstract
The presence of autoimmune thyroid condition could lead to thyroid dysfunction in adults. In addition, thyroid antibody positivity has been suggested to be associated with hyperuricemia, diabetes and obesity in individuals with thyroid autoimmune diseases. Currently, there are limited studies that assessed the relationship of thyroid antibody with the components of metabolic syndrome in adults, especially from iodine-sufficient regions. Therefore, the aim of this study was to determine the prevalence of components of metabolic syndrome in Chinese adults with autoimmune thyroid condition. Medical records of adult inpatients in the Suzhou Ninth People's Hospital, Suzhou, Jiangsu, China, from January 2016 to September 2019 were reviewed and included after screening for eligibility. A total of 1105 participants were included in our final analysis, and of these, 77.5% (n = 856) were females. There was a higher prevalence of thyroid antibodies in females than males (30.6% vs. 23.7%) (p = 0.034). Although there were significant differences in mean TSH, FT3 and FT4 values between participants positive and negative for thyroid antibodies, these values were still within the normal reference range. No differences in the mean BMI, prevalence of diabetes, hyperuricemia, hypertriglyceridemia and hypercholesterolemia between participants positive and negative for thyroid antibodies were reported (p > 0.05). In conclusion, our study reported that participants positive for thyroid antibodies did not appear to be accompanied by abnormal thyroid function, lipid profile, uric acid and glucose concentrations.
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Affiliation(s)
- Binyu Pan
- Department of Clinical Nutrition, Suzhou Ninth People's Hospital, Suzhou, 215200, Jiangsu Province, China
| | - Qin Zhang
- Department of Clinical Nutrition, Suzhou Ninth People's Hospital, Suzhou, 215200, Jiangsu Province, China
| | - Hang Zhou
- Clinical Medical College, Yangzhou University, Yangzhou, 225009, Jiangsu Province, China
- Department of Clinical Nutrition, Northern Jiangsu People's Hospital, Yangzhou, 225001, Jiangsu Province, China
| | - Zheng Feei Ma
- Department of Health and Environmental Sciences, Xi'an Jiaotong-Liverpool University, Suzhou, 215123, Jiangsu Province, China.
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15
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Babić Leko M, Gunjača I, Pleić N, Zemunik T. Environmental Factors Affecting Thyroid-Stimulating Hormone and Thyroid Hormone Levels. Int J Mol Sci 2021; 22:6521. [PMID: 34204586 PMCID: PMC8234807 DOI: 10.3390/ijms22126521] [Citation(s) in RCA: 68] [Impact Index Per Article: 22.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2021] [Revised: 06/11/2021] [Accepted: 06/14/2021] [Indexed: 01/09/2023] Open
Abstract
Thyroid hormones are necessary for the normal functioning of physiological systems. Therefore, knowledge of any factor (whether genetic, environmental or intrinsic) that alters the levels of thyroid-stimulating hormone (TSH) and thyroid hormones is crucial. Genetic factors contribute up to 65% of interindividual variations in TSH and thyroid hormone levels, but many environmental factors can also affect thyroid function. This review discusses studies that have analyzed the impact of environmental factors on TSH and thyroid hormone levels in healthy adults. We included lifestyle factors (smoking, alcohol consumption, diet and exercise) and pollutants (chemicals and heavy metals). Many inconsistencies in the results have been observed between studies, making it difficult to draw a general conclusion about how a particular environmental factor influences TSH and thyroid hormone levels. However, lifestyle factors that showed the clearest association with TSH and thyroid hormones were smoking, body mass index (BMI) and iodine (micronutrient taken from the diet). Smoking mainly led to a decrease in TSH levels and an increase in triiodothyronine (T3) and thyroxine (T4) levels, while BMI levels were positively correlated with TSH and free T3 levels. Excess iodine led to an increase in TSH levels and a decrease in thyroid hormone levels. Among the pollutants analyzed, most studies observed a decrease in thyroid hormone levels after exposure to perchlorate. Future studies should continue to analyze the impact of environmental factors on thyroid function as they could contribute to understanding the complex background of gene-environment interactions underlying the pathology of thyroid diseases.
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Affiliation(s)
| | | | | | - Tatijana Zemunik
- Department of Medical Biology, School of Medicine, University of Split, Šoltanska 2, 21000 Split, Croatia; (M.B.L.); (I.G.); (N.P.)
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16
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Baron JA, Nichols HB, Anderson C, Safe S. Cigarette Smoking and Estrogen-Related Cancer. Cancer Epidemiol Biomarkers Prev 2021; 30:1462-1471. [PMID: 33990391 DOI: 10.1158/1055-9965.epi-20-1803] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2020] [Revised: 03/13/2021] [Accepted: 05/10/2021] [Indexed: 12/23/2022] Open
Abstract
Cigarette smoking is a known cause of many cancers, yet epidemiologic studies have found protective associations with the risk of four "estrogen-related" malignancies: endometrial cancer, endometrioid and clear cell ovarian cancers, and thyroid cancer. This review considers epidemiologic and biological aspects of these associations, focusing particularly on estrogen signaling, and contrasts them with those for breast cancer, another estrogen-related malignancy. The observational findings regarding the inverse associations are consistent and remain after adjustment for possible confounding factors. In general, women who smoke do not have lower circulating estrogen levels than nonsmokers, eliminating one possible explanation for reduced risks of these malignancies. For endometrial and endometrioid ovarian cancer, the negative associations could plausibly be explained by interference with signaling through the estrogen receptor α. However, this is unlikely to explain the lower risks of thyroid and clear cell ovarian cancers. For thyroid cancer, an anti-inflammatory effect of nicotine and reduced TSH levels from smoking have been proposed explanations for the inverse association, but both lack convincing evidence. While the overall impact of cigarette smoking is overwhelmingly negative, protective associations such as those discussed here can provide potential clues to disease etiology, treatment, and prevention.
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Affiliation(s)
- John A Baron
- Department of Medicine, University of North Carolina School of Medicine, Chapel Hill, North Carolina. .,Department of Epidemiology, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, North Carolina.,Department of Epidemiology, Geisel School of Medicine at Dartmouth, Hanover, New Hampshire
| | - Hazel B Nichols
- Department of Epidemiology, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, North Carolina
| | - Chelsea Anderson
- Department of Epidemiology, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, North Carolina
| | - Stephen Safe
- Department of Veterinary Physiology & Pharmacology, Texas A&M University, College Station, Texas
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Han B, Chen C, Chen Y, Wang N, Yu J, Cheng J, Chen Y, Zhu C, Lu Y. Relationship between Gene Polymorphisms and Urine Iodine Levels on Susceptibility to Thyroid Peroxidase Antibody Positivity in the Chinese Population. Eur Thyroid J 2021; 10:79-85. [PMID: 33777823 PMCID: PMC7983603 DOI: 10.1159/000506701] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/01/2019] [Revised: 02/08/2020] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND/AIMS Hashimoto thyroiditis, characterized by positive thyroid peroxidase antibodies (TPOAbs), is caused by the interaction of genetic and environment factors. The aim of this study was to clarify the interaction of gene polymorphisms and iodine intake in the incidence of TPOAb positivity. METHODS 1,733 subjects were included in this study. Genomic DNA was extracted from peripheral blood white cells. Four SNPs (rs11675434 [TPO], rs3094228 [HCP5], rs9277555 [HLA-DPB1], and rs301799 [RERE]) were selected for genotyping. Weighted TPOAb genetic risk score (GRS) was calculated based on these 4 SNPs. Thyroid hormones and autoimmune antibodies (TPOAb and thyroglobulin antibody) were determined using the electrochemiluminescence immunoassay method. RESULTS The mean serum thyrotropin level in TPOAb-positive subjects was higher than in TPOAb-negative subjects (p < 0.01). Genotype GG of rs9277555 was associated with an increased risk of TPOAb positivity (OR = 1.64, 5-95% CI 1.09, 2.47, p = 0.02). Genotype TT of rs11675434 showed marginal increased risk of TPOAb positivity (OR = 1.57, 5-95% CI 1.01, 2.43, p = 0.048). Logistic regression analysis showed TPOAb-GRS and rs9277555 were associated with TPOAb positivity (OR = 5.09, 5-95% CI 1.30, 19.91, p = 0.02 and OR = 1.30, 5-95% CI 1.05, 1.61, p = 0.02). Subjects with a high TPOAb-GRS had a 52% increased risk of TPOAb positivity compared to subjects with a low TPOAb-GRS (OR 1.52, 5-95% CI 1.05, 2.21, p = 0.03). CONCLUSION TPOAb-GRS was associated with an increased risk of TPOAb positivity in a Chinese Han population. This effect might be attribute to rs9277555.
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Affiliation(s)
- Bing Han
- **Bing Han, MD, PhD, Institute and Department of Endocrinology and Metabolism, Shanghai Ninth People's Hospital Affiliated to Shanghai Jiaotong, University School of Medicine, Shanghai 200011 (China),
| | | | | | | | | | | | | | | | - Yingli Lu
- *Yingli Lu, MD, PhD, Institute and Department of Endocrinology and Metabolism, Shanghai Ninth People's Hospital Affiliated to Shanghai Jiaotong, University School of Medicine, Shanghai 200011 (China),
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18
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van der Spoel E, Roelfsema F, van Heemst D. Within-Person Variation in Serum Thyrotropin Concentrations: Main Sources, Potential Underlying Biological Mechanisms, and Clinical Implications. Front Endocrinol (Lausanne) 2021; 12:619568. [PMID: 33716972 PMCID: PMC7945716 DOI: 10.3389/fendo.2021.619568] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Accepted: 01/08/2021] [Indexed: 01/02/2023] Open
Abstract
BACKGROUND Individuals exhibit fluctuations in the concentration of serum thyroid-stimulating hormone (TSH) over time. The scale of these variations ranges from minutes to hours, and from months to years. The main factors contributing to the observed within-person fluctuations in serum TSH comprise pulsatile secretion, circadian rhythm, seasonality, and ageing. In clinical practice and clinical research however, such within-person biological variation in serum TSH concentrations is often not considered. The aim of this review is to present an overview of the main sources of within-person variation in TSH levels, as well as the potential underlying biological mechanisms, and the clinical implications. SUMMARY In euthyroid individuals, the circadian rhythm, with a nocturnal surge around 02:00-04:00 h and a nadir during daytime has the greatest impact on variations in serum TSH concentrations. Another source of within-person variation in TSH levels is seasonality, with generally higher levels during the cold winter months. Since TSH is secreted in a pulsatile manner, TSH levels also fluctuate over minutes. Furthermore, elevated TSH levels have been observed with ageing. Other factors that affect TSH levels include thyroid peroxidase (TPO)-antibody positivity, BMI, obesity, smoking, critical illness, and many xenobiotics, including environmental pollutants and drugs. Potential underlying biological mechanisms of within-person variation in TSH levels can be safely concluded from the ability of TSH to respond quickly to changes in cues from the internal or external environment in order to maintain homeostasis. Such cues include the biological clock, environmental temperature, and length of day. The observed increase in TSH level with ageing can be explained at a population level and at an organism level. In clinical practice, the season for thyroid testing can influence a patient's test result and it occurs frequently that subclinical hypothyroid patients normalize to euthyroid levels over time without intervention. CONCLUSIONS Serum TSH concentrations vary over time within an individual, which is caused by multiple different internal and external factors. It is important to take the within-person variations in serum TSH concentrations into account when testing a patient in clinical practice, but also in performing clinical research.
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Affiliation(s)
- Evie van der Spoel
- Section Gerontology and Geriatrics, Department of Internal Medicine, Leiden University Medical Center, Leiden, Netherlands
- *Correspondence: Evie van der Spoel,
| | - Ferdinand Roelfsema
- Section Endocrinology, Department of Internal Medicine, Leiden University Medical Center, Leiden, Netherlands
| | - Diana van Heemst
- Section Gerontology and Geriatrics, Department of Internal Medicine, Leiden University Medical Center, Leiden, Netherlands
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Gardner JA, Johnson RK, Dong F, Hoffman M, Steck AK, Frohnert BI, Rewers M, Norris JM. Gluten intake and risk of thyroid peroxidase autoantibodies in the Diabetes Autoimmunity Study In the Young (DAISY). Endocrine 2020; 70:331-337. [PMID: 32651851 PMCID: PMC7584755 DOI: 10.1007/s12020-020-02412-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Accepted: 06/27/2020] [Indexed: 10/23/2022]
Abstract
PURPOSE Autoimmune diseases co-occur, perhaps due to common risk factors. The age at gluten introduction and gluten intake in early childhood has been associated with the autoimmunity preceding celiac disease (CD) and type-1 diabetes (T1D). We explored their associations with the development of thyroid autoimmunity. METHODS DAISY has prospectively followed children at increased risk for T1D and CD since 1993. During follow-up, 107 children developed thyroid autoimmunity, defined as positivity for autoantibodies against thyroid peroxidase on at least two study visits. Age at gluten introduction was ascertained from food history interviews every 3 months until 15 months of age. Gluten intake (g/day) at age 1-2 years was estimated using a food frequency questionnaire. RESULTS From multivariable Cox regression, there was no association between the age of gluten introduction nor the amount of gluten intake and development of thyroid autoimmunity. However, females (hazard ratio = 2.19, 95% CI: 1.46, 3.27) and cases of islet autoimmunity (HR = 2.20, 95% CI: 1.39, 3.50) were significantly more likely to develop thyroid autoimmunity, while exposure to environmental tobacco smoke decreased the risk (HR = 0.46, 95% CI: 0.30, 0.71). CONCLUSIONS Neither the age of gluten introduction nor the amount of gluten consumed in early childhood is associated with risk of thyroid autoimmunity.
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Affiliation(s)
| | - Randi K Johnson
- Division of Bioinformatics and Personalized Medicine, School of Medicine, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
| | - Fran Dong
- Barbara Davis Center for Diabetes, Aurora, CO, USA
| | | | | | | | | | - Jill M Norris
- Department of Epidemiology, Colorado School of Public Health, Aurora, CO, USA.
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