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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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Patel AM, Khan S, Inam AMH, Alam R, Khan MM. Determination of Serum Zinc and Phosphorus Levels in Patients with Hypothyroidism. Biol Trace Elem Res 2024; 202:3018-3024. [PMID: 37819464 DOI: 10.1007/s12011-023-03905-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Accepted: 10/03/2023] [Indexed: 10/13/2023]
Abstract
Various studies reported that serum zinc (Zn) and phosphorus (P) levels altered in patients with hypothyroidism and vice versa, but results were found inconsistent. It was aimed to find the association between serum Zn and P in patients with hypothyroidism. In this case-control study, a total of 100 subjects (50 newly diagnosed patients of hypothyroidism and 50 controls) were enrolled aged between 25 and 60 years. Biochemical parameters such as thyroid profile, serum Zn, and P were estimated in each subject. A p < 0.05 was considered statistically significant. The mean level of body mass index (BMI), thyroid-stimulating hormone (TSH), and serum P was found significantly elevated in cases compared to controls (p < 0.001). However, the mean level of total triiodothyronine (T3), thyroxine (T4), and serum Zn was found significantly reduced in cases compared to controls (p < 0.001). The serum Zn has shown a significant negative correlation with T3 and BMI among cases (r = - 0.313 p < 0.05, r = - 0.338 p < 0.05, respectively). However, serum P has shown a significant positive correlation with TSH and BMI among cases (r = 0.310 p < 0.05, r = 0.449 p < 0.01, respectively). Regression analysis indicated that serum Zn significantly predicted hypothyroidism (p < 0.00). Similarly, serum P significantly predicted hypothyroidism (p < 0.007). Results showed that serum Zn levels were significantly reduced and serum P levels were significantly elevated in cases compared to controls. The serum Zn and serum P both significantly associated with hypothyroidism.
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Affiliation(s)
- Amrendra Mani Patel
- Department of Biochemistry, Integral Institute of Medical Sciences & Research (IIMSR), Integral University, Lucknow, Uttar Pradesh, 226026, India
| | - Saba Khan
- Department of Biochemistry, Integral Institute of Medical Sciences & Research (IIMSR), Integral University, Lucknow, Uttar Pradesh, 226026, India
| | - Ahmad Merajul Hasan Inam
- Department of Physiotherapy, Integral Institute of Allied Health Sciences & Research (IIAHSR), Integral University, Lucknow, Uttar Pradesh, 226026, India
| | - Roshan Alam
- Department of Biochemistry, Integral Institute of Medical Sciences & Research (IIMSR), Integral University, Lucknow, Uttar Pradesh, 226026, India
| | - Mohammad Mustufa Khan
- Department of Basic Medical Sciences, Integral Institute of Allied Health Sciences & Research (IIAHSR), Integral University, Lucknow, Uttar Pradesh, 226026, India.
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Chapela SP, Simancas-Racines A, Ceriani F, Martinuzzi ALN, Russo MP, Zambrano AK, Simancas-Racines D, Verde L, Muscogiuri G, Katsanos CS, Frias-Toral E, Barrea L. Obesity and Obesity-Related Thyroid Dysfunction: Any Potential Role for the Very Low-Calorie Ketogenic Diet (VLCKD)? Curr Nutr Rep 2024; 13:194-213. [PMID: 38526760 PMCID: PMC11133069 DOI: 10.1007/s13668-024-00528-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/05/2024] [Indexed: 03/27/2024]
Abstract
PURPOSE OF REVIEW This review aims to explore in-depth the different aspects of the association between very low-calorie ketogenic diet (VLCKD), obesity and obesity-related thyroid dysfunction. RECENT FINDINGS The VLCKD, proposed as a non-pharmacological strategy for the management of certain chronic diseases, is becoming increasingly popular worldwide. Initially used to treat epilepsy, it has been shown to be effective in controlling body weight gain and addressing various pathophysiological conditions. Research has shown that a low-calorie, high-fat diet can affect thyroid hormone levels. Weight loss can also influence thyroid hormone levels. Studies have suggested that long-term use of VLCKD for refractory epilepsy may be related to the development of hypothyroidism, with an effect seen in various populations. In particular, women with obesity following VLCKD tend to have reduced T3 levels. We propose further research to unravel the underlying mechanisms linking VLCKD to obesity and obesity-related thyroid dysfunction.
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Affiliation(s)
- Sebastián Pablo Chapela
- Facultad de Medicina, Departamento de Bioquímica Humana, Universidad de Buenos Aires, Ciudad Autónoma de Buenos Aires, Argentina
- Equipo de Soporte Nutricional, Hospital Británico de Buenos Aires, Ciudad Autónoma de Buenos Aires, Argentina
| | - Alison Simancas-Racines
- Facultad de, Ciencias Agropecuarias y Recursos Naturales, Carrera de Medicina Veterinaria, Universidad Técnica de Cotopaxi, Latacunga, 050108, Ecuador
- Centro de Investigación de Salud Pública y Epidemiología Clínica (CISPEC), Facultad de Veterinaria y Agronomía, Universidad UTE, Santo Domingo, Ecuador
| | - Florencia Ceriani
- Escuela de Nutrición, Universidad de la República Uruguay, Montevideo, Uruguay
| | | | - María Paula Russo
- Servicio de Clínica Médica, Hospital Italiano de Buenos Aires, Ciudad Autónoma de Buenos Aires, Argentina
| | - Ana Karina Zambrano
- Centro de Investigación Genética y Genómica, Universidad UTE, Facultad de Ciencias de la Salud Eugenio Espejo, Quito, Ecuador
| | - Daniel Simancas-Racines
- Centro de Investigación de Salud Pública y Epidemiología Clínica (CISPEC), Universidad UTE, Facultad de Ciencias de la Salud Eugenio Espejo, Quito, 170129, Ecuador
| | - Ludovica Verde
- Department of Public Health, University of Naples Federico II, Via Sergio Pansini 5, 80131, Naples, Italy
| | - Giovanna Muscogiuri
- Unità di Endocrinologia, Diabetologia e Andrologia, Dipartimento di Medicina Clinica e Chirurgia, 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, 80131, Naples, Italy.
| | | | - Evelyn Frias-Toral
- School of Medicine, Universidad Espíritu Santo - Samborondón, 0901952, Samborondón, Ecuador
| | - Luigi Barrea
- Dipartimento di Benessere, Nutrizione e Sport, Università Telematica Pegaso, Centro Direzionale Isola F2, Via Porzio, 80143, Naples, Italy
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Mazza E, Troiano E, Ferro Y, Lisso F, Tosi M, Turco E, Pujia R, Montalcini T. Obesity, Dietary Patterns, and Hormonal Balance Modulation: Gender-Specific Impacts. Nutrients 2024; 16:1629. [PMID: 38892561 PMCID: PMC11174431 DOI: 10.3390/nu16111629] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2024] [Revised: 05/22/2024] [Accepted: 05/23/2024] [Indexed: 06/21/2024] Open
Abstract
Understanding the intricate relationship between nutrition, hormonal balance, and gender-specific factors is crucial for developing targeted interventions to mitigate obesity-related endocrine disruptions and improve metabolic health. This narrative review examines the impact of various dietary patterns on hormonal regulation in both men and women, focusing on their effects on hormonal balance and metabolic health in the context of obesity. Calorie restriction, the Western diet, high-fat diets, low-CHO diets, plant-based diets, and the Mediterranean diet are analyzed in relation to their influence on obesity-related endocrine disruptions and metabolic health. Future research directions include investigating the specific mechanisms underlying dietary influences on hormonal regulation, addressing the gender-specific metabolic differences and body fat distribution, and exploring the dietary needs of individuals undergoing gender transition. Personalized dietary interventions tailored to individual metabolic and hormonal profiles are essential for optimizing health outcomes across the gender spectrum. By integrating gender-specific considerations into dietary recommendations, healthcare professionals can better support individuals in achieving optimal metabolic health and hormonal balance.
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Affiliation(s)
- Elisa Mazza
- Department of Clinical and Experimental Medicine, University Magna Græcia, 88100 Catanzaro, Italy; (E.M.); (T.M.)
- Technical Scientific Association of Food, Nutrition and Dietetics (ASAND), 95128 Catania, Italy; (E.T.); (F.L.)
| | - Ersilia Troiano
- Technical Scientific Association of Food, Nutrition and Dietetics (ASAND), 95128 Catania, Italy; (E.T.); (F.L.)
- Social Educational Directorate of Rome III Montesacro Municipality, 00139 Rome, Italy
| | - Yvelise Ferro
- Department of Medical and Surgical Science, University Magna Græcia, 88100 Catanzaro, Italy; (Y.F.); (R.P.)
| | - Fabrizia Lisso
- Technical Scientific Association of Food, Nutrition and Dietetics (ASAND), 95128 Catania, Italy; (E.T.); (F.L.)
- “Sant’Anna” Hospital, San Fermo della Battaglia, 22042 Como, Italy
| | - Martina Tosi
- Technical Scientific Association of Food, Nutrition and Dietetics (ASAND), 95128 Catania, Italy; (E.T.); (F.L.)
- Department of Health Sciences, University of Milan, 20146 Milan, Italy
| | - Ettore Turco
- Department of Public Health, University of Naples “Federico II”, 80131 Naples, Italy;
| | - Roberta Pujia
- Department of Medical and Surgical Science, University Magna Græcia, 88100 Catanzaro, Italy; (Y.F.); (R.P.)
| | - Tiziana Montalcini
- Department of Clinical and Experimental Medicine, University Magna Græcia, 88100 Catanzaro, Italy; (E.M.); (T.M.)
- Research Center for the Prevention and Treatment of Metabolic Diseases, University Magna Græcia, 88100 Catanzaro, Italy
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5
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Bablis P, Day RR, Bablis S, Pollard H. Treatment of Hypothyroidism and Stress Using Neuro-Emotional Technique (NET): A Case Study. Cureus 2024; 16:e58231. [PMID: 38745794 PMCID: PMC11092426 DOI: 10.7759/cureus.58231] [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] [Accepted: 04/14/2024] [Indexed: 05/16/2024] Open
Abstract
Hypothyroidism is generally considered an autoimmune condition, and typical medical management involves taking levothyroxine (synthetic thyroid hormone) for life. This case report details the results of a mind-body intervention (MBI) called the Neuro-Emotional Technique (NET) used to treat a 28-year-old Caucasian female presenting with symptoms and bloodwork markers associated with two years of hypothyroidism and a long history of stress. The patient's medical doctor provided a diagnosis of hypothyroidism after blood tests showed that thyroid-stimulating hormone (TSH) levels were high at 6.87 mIU/L (where the acceptable range is 0.40-3.50 mIU/L) and free T4 (FT4) levels were low at 8.6 pmol/L (where the acceptable range is 9.0-19.0 pmol/L). Psychometric tests were completed at baseline and after 12 weeks of treatment to evaluate changes in mental health and emotional well-being. The Adverse Childhood Experiences Questionnaire (ACE-Q) revealed a high degree of childhood trauma that may have predisposed to the underlying autoimmune thyroid dysfunction. At the conclusion of the treatment period, serum thyroid-stimulating hormone (TSH) and free T4 were within normal ranges and psychometric indicators normalized. We hypothesize that these changes may be due to the stress-reducing mechanism of NET and outline possible mechanisms via the Psycho-Immune-Neuroendocrine (PINE) network. The PINE network model asserts that chronic stress acts as a potential driver of pathophysiology that can lead to one or more medical and mental health conditions. While further studies with larger sample sizes are required to establish whether these results could be extrapolated to a wider population, the results of this case suggest that it may be pertinent to consider co-management of subclinical hypothyroidism with a relatively quick and cost-effective MBI such as NET.
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Affiliation(s)
- Peter Bablis
- Department of Maternal and Child Health and Precision Medicine, University Research Institute, Athens, GRC
- Department of Integrative and Complementary Medicine, Universal Health, Sydney, AUS
| | - Ryan R Day
- Department of Chiropractic, Universal Health, Sydney, AUS
| | - Sophia Bablis
- Department of Psychology, Universal Health, Sydney, AUS
| | - Henry Pollard
- Faculty of Health Sciences, Durban University of Technology, Durban, ZAF
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6
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Biondi B. Subclinical Hypothyroidism in Patients with Obesity and Metabolic Syndrome: A Narrative Review. Nutrients 2023; 16:87. [PMID: 38201918 PMCID: PMC10780356 DOI: 10.3390/nu16010087] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2023] [Revised: 12/17/2023] [Accepted: 12/18/2023] [Indexed: 01/12/2024] Open
Abstract
The literature on the connection between obesity, metabolic syndrome, and subclinical hypothyroidism is critically analyzed in this narrative review. These conditions are frequently observed among adult populations and various studies and meta-analyses have assessed their association. The prevalence of subclinical hypothyroidism in obese individuals is higher than in non-obese subjects and this trend is more pronounced in unhealthy obesity phenotypes. However, the diagnosis and treatment of subclinical hypothyroidism can be difficult in obese patients. Exaggerated body fat is linked to thyroid hypoechogenicity as evident through ultrasonography and euthyroid obese people have greater TSH, FT3, and FT3/FT4 ratios than non-obese individuals in a euthyroid condition. Moreover, a reduced expression of the TSH receptor and altered function of deiodinases has been found in the adipose tissue of obese patients. Current data do not support the necessity of a pharmacological correction of the isolated hyperthyrotropinemia in euthyroid obese patients because treatment with thyroid hormone does not significantly improve weight loss and the increase in serum TSH can be reversible after hypocaloric diet or bariatric surgery. On the other hand, obesity is linked to elevated leptin levels. Inflammation can raise the risk of Hashimoto thyroiditis, which increases the likelihood that obese patients will experience overt or subclinical hypothyroidism. Both metabolic syndrome and subclinical hypothyroidism are associated with atherosclerosis, liver and kidney disease. Hence, the association of these two illnesses may potentiate the adverse effects noted in each of them. Subclinical hypothyroidism should be identified in patients with obesity and treated with appropriate doses of L-thyroxine according to the lean body mass and body weight. Randomized controlled trials are necessary to verify whether treatment of thyroid deficiency could counteract the expected risks.
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Affiliation(s)
- Bernadette Biondi
- Division of Internal Medicine and Cardiovascular Endocrinology, Department of Clinical Medicine and Surgery, University of Naples Federico II, 80131 Naples, Italy
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Medici BR, Nygaard B, la Cour JL, Krakauer M, Brønden A, Sonne MP, Holst JJ, Rehfeld JF, Vilsbøll T, Faber J, Knop FK. Effects of levothyroxine substitution therapy on hunger and food intake in individuals with hypothyroidism. Endocr Connect 2023; 12:e230314. [PMID: 37582332 PMCID: PMC10563635 DOI: 10.1530/ec-23-0314] [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: 08/02/2023] [Accepted: 08/15/2023] [Indexed: 08/17/2023]
Abstract
Context In individuals with hypothyroidism and overweight, levothyroxine substitution therapy is often expected to cause weight loss due to its effect on resting energy expenditure. However, despite levothyroxine-induced enhancement of resting energy expenditure, fat mass loss is rarely seen after levothyroxine substitution therapy. The mechanism behind this conundrum is unknown. Aim The aim of the study was to assess the effect of levothyroxine therapy on hunger sensations and ad libitum food intake in individuals with hypothyroidism. Design and setting Prospective cohort study of 18 newly diagnosed hypothyroid women (thyroid-stimulating hormone (TSH) >10 mU/L). Participants were investigated at diagnosis, after normalization of TSH (<4.0 mU/L), and after 6 months of successful treatment. Eighteen age and body mass index-matched healthy controls were also included. Intervention Hypothyroid individuals were treated with levothyroxine according to European Thyroid Association guidelines. Main outcomes Changes in hunger sensation were assessed using visual analog scales (cm) before and during a standardized mixed meal test, and food intake was measured during a subsequent ad libitum meal (g). Results After 6 months of levothyroxine therapy, mean resting energy expenditure was increased by 144 kcal/day (10%) (P < 0.001). Weight loss was comprised of 0.8 kg fat-free mass while fat mass remained unchanged. Fasting hunger sensation increased from a mean of 4.5 (s.d. 2.2) cm to 5.5 (s.d. 2.2) cm (P = 0.047). The numerical increase in ad libitum meal intake did not reach statistical significance. Conclusion Our data suggest that levothyroxine-induced hunger may be a culprit in the lack of fat mass loss from levothyroxine therapy.
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Affiliation(s)
- Bjarke R Medici
- Department of Medicine, Herlev Hospital, University of Copenhagen, Herlev, Denmark
- Center for Clinical Metabolic Research, Gentofte Hospital, University of Copenhagen, Hellerup, Denmark
| | - Birte Nygaard
- Department of Medicine, Herlev Hospital, University of Copenhagen, Herlev, Denmark
- Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Jeppe L la Cour
- Department of Medicine, Herlev Hospital, University of Copenhagen, Herlev, Denmark
| | - Martin Krakauer
- Department of Clinical Physiology and Nuclear Medicine, Gentofte Hospital, University of Copenhagen, Hellerup, Denmark
- Department of Clinical Physiology and Nuclear Medicine, Bispebjerg and Frederiksberg Hospital, University of Copenhagen, Copenhagen, Denmark
| | - Andreas Brønden
- Center for Clinical Metabolic Research, Gentofte Hospital, University of Copenhagen, Hellerup, Denmark
- Department of Clinical Pharmacology, Bispebjerg and Frederiksberg Hospital, University of Copenhagen, Copenhagen, Denmark
| | - Mette P Sonne
- Department of Medicine, Herlev Hospital, University of Copenhagen, Herlev, Denmark
| | - Jens J Holst
- Department of Biomedical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
- Novo Nordisk Foundation Center for Basic Metabolic Research, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Jens F Rehfeld
- Department of Clinical Biochemistry, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
| | - Tina Vilsbøll
- Center for Clinical Metabolic Research, Gentofte Hospital, University of Copenhagen, Hellerup, Denmark
- Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
- Steno Diabetes Center Copenhagen, Herlev, Denmark
| | - Jens Faber
- Department of Medicine, Herlev Hospital, University of Copenhagen, Herlev, Denmark
- Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Filip K Knop
- Center for Clinical Metabolic Research, Gentofte Hospital, University of Copenhagen, Hellerup, Denmark
- Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
- Department of Biomedical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
- Steno Diabetes Center Copenhagen, Herlev, Denmark
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Nikanorova AA, Barashkov NA, Pshennikova VG, Teryutin FM, Nakhodkin SS, Solovyev AV, Romanov GP, Burtseva TE, Fedorova SA. A Systematic Review and Meta-Analysis of Free Triiodothyronine (FT3) Levels in Humans Depending on Seasonal Air Temperature Changes: Is the Variation in FT3 Levels Related to Nonshivering Thermogenesis? Int J Mol Sci 2023; 24:14052. [PMID: 37762355 PMCID: PMC10531421 DOI: 10.3390/ijms241814052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2023] [Revised: 09/08/2023] [Accepted: 09/11/2023] [Indexed: 09/29/2023] Open
Abstract
Thyroid hormones play a crucial role in regulating normal development, growth, and metabolic function. However, the controversy surrounding seasonal changes in free triiodothyronine (FT3) levels remains unresolved. Therefore, the aim of this study was to conduct a systematic review and meta-analysis of variations in FT3 levels in relation to seasonal air temperatures in the context of current knowledge about its role in nonshivering thermogenesis. Ten eligible articles with a total of 336,755 participants were included in the meta-analysis. The studies were categorized into two groups based on the air temperature: "Cold winter", where the winter temperature fell below 0 °C, and "Warm winter", where the winter temperature was above 0 °C. The analysis revealed that in cold regions, FT3 levels decreased in winter compared to summer (I2 = 57%, p < 0.001), whereas in warm regions, FT3 levels increased during winter (I2 = 28%, p < 0.001). These findings suggest that seasonal variations in FT3 levels are likely to be influenced by the winter temperature. Considering the important role of the FT3 in the nonshivering thermogenesis process, we assume that this observed pattern is probably related to the differences in use of thyroid hormones in the brown adipose tissue during adaptive thermogenesis, which may depend on intensity of cold exposure.
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Affiliation(s)
- Alena A. Nikanorova
- Yakut Science Centre of Complex Medical Problems, Yaroslavskogo 6/3, 677000 Yakutsk, Russia; (A.A.N.); (V.G.P.); (F.M.T.); (T.E.B.); (S.A.F.)
| | - Nikolay A. Barashkov
- Yakut Science Centre of Complex Medical Problems, Yaroslavskogo 6/3, 677000 Yakutsk, Russia; (A.A.N.); (V.G.P.); (F.M.T.); (T.E.B.); (S.A.F.)
| | - Vera G. Pshennikova
- Yakut Science Centre of Complex Medical Problems, Yaroslavskogo 6/3, 677000 Yakutsk, Russia; (A.A.N.); (V.G.P.); (F.M.T.); (T.E.B.); (S.A.F.)
| | - Fedor M. Teryutin
- Yakut Science Centre of Complex Medical Problems, Yaroslavskogo 6/3, 677000 Yakutsk, Russia; (A.A.N.); (V.G.P.); (F.M.T.); (T.E.B.); (S.A.F.)
| | - Sergey S. Nakhodkin
- M.K. Ammosov North-Eastern Federal University, Kulakovskogo 46, 677013 Yakutsk, Russia; (S.S.N.); (A.V.S.); (G.P.R.)
| | - Aisen V. Solovyev
- M.K. Ammosov North-Eastern Federal University, Kulakovskogo 46, 677013 Yakutsk, Russia; (S.S.N.); (A.V.S.); (G.P.R.)
| | - Georgii P. Romanov
- M.K. Ammosov North-Eastern Federal University, Kulakovskogo 46, 677013 Yakutsk, Russia; (S.S.N.); (A.V.S.); (G.P.R.)
| | - Tatiana E. Burtseva
- Yakut Science Centre of Complex Medical Problems, Yaroslavskogo 6/3, 677000 Yakutsk, Russia; (A.A.N.); (V.G.P.); (F.M.T.); (T.E.B.); (S.A.F.)
- M.K. Ammosov North-Eastern Federal University, Kulakovskogo 46, 677013 Yakutsk, Russia; (S.S.N.); (A.V.S.); (G.P.R.)
| | - Sardana A. Fedorova
- Yakut Science Centre of Complex Medical Problems, Yaroslavskogo 6/3, 677000 Yakutsk, Russia; (A.A.N.); (V.G.P.); (F.M.T.); (T.E.B.); (S.A.F.)
- M.K. Ammosov North-Eastern Federal University, Kulakovskogo 46, 677013 Yakutsk, Russia; (S.S.N.); (A.V.S.); (G.P.R.)
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9
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Xu B, Gu SY, Zhou NM, Jiang JJ. Association between thyroid stimulating hormone levels and papillary thyroid cancer risk: A meta-analysis. Open Life Sci 2023; 18:20220671. [PMID: 37588997 PMCID: PMC10426723 DOI: 10.1515/biol-2022-0671] [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: 04/14/2023] [Revised: 06/15/2023] [Accepted: 07/06/2023] [Indexed: 08/18/2023] Open
Abstract
High thyroid stimulating hormone (TSH) levels may stimulate papillary thyroid cancer (PTC) cell proliferation; however, the relationship between TSH levels and PTC risk remains controversial. We aim to ascertain the association through a meta-analysis. Literature searches were conducted in PubMed, Embase, and Web of Science databases. After literature screening, the methodological quality was assessed using the Newcastle-Ottawa Scale and Agency for Healthcare Research and Quality methods. Cochran's Q and I 2 tests were used to evaluate heterogeneity in the meta-analysis. Egger's test was applied to assess publication bias. A total of 12 eligible studies were included in this meta-analysis; all were of moderate and high methodological quality. The pooled results suggested that increased TSH levels were significantly associated with PTC risk; however, the included studies were significantly heterogeneous. Stratification analysis indicated that the heterogeneity might be from the area or type of control. Although significant publication bias existed among the studies, the trim-and-fill method and sensitivity analysis revealed that the combined results were stable and robust. TSH levels are significantly associated with the PTC risk; however, more high-quality studies in large sample sizes are recommended to verify the extrapolation of these findings.
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Affiliation(s)
- Bin Xu
- Department of Ultrasound, Shanghai Fifth People’s Hospital, Fudan University, 128 Ruili Road, Minhang District, Shanghai, 200240, China
| | - Shu-Yan Gu
- Department of Ultrasound, Shanghai Fifth People’s Hospital, Fudan University, 128 Ruili Road, Minhang District, Shanghai, 200240, China
| | - Ning-Ming Zhou
- Department of Ultrasound, Shanghai Fifth People’s Hospital, Fudan University, 128 Ruili Road, Minhang District, Shanghai, 200240, China
| | - Jun-Jie Jiang
- Department of Ultrasound, Shanghai Fifth People’s Hospital, Fudan University, 128 Ruili Road, Minhang District, Shanghai, 200240, China
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Goncharova ND, Ermolaeva AM, Chigarova OA, Oganyan TE, Ivanova LG, Timoshenko NV. Individual Features of the Hypothalamic-Pituitary-Thyroid Axis Functioning during Aging in Non-Human Primates. Bull Exp Biol Med 2023; 175:497-502. [PMID: 37768463 DOI: 10.1007/s10517-023-05894-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2023] [Indexed: 09/29/2023]
Abstract
Individual features of age-related changes in the function of the neuroendocrine systems are an important problem as the basic component of a personalized approach to predicting and treating age-related pathologies. We studied the age-related features of the function of the hypothalamic-pituitary-thyroid axis in laboratory primates with depression- and anxiety-like behavior (DAB). It was found that in young female rhesus monkeys with DAB, the basal and thyrotropin-releasing hormone-stimulated levels of thyroid-stimulating hormone were significantly lower than in young animals with standard behavior (control). During aging, the levels of thyroid-stimulating hormone increased in DAB animals and free thyroxine concentrations decreased both at baseline (fasting) and in response to the thyrotropin-releasing hormone test, while in animals with standard behavior, only a trend towards similar hormonal changes was revealed.
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Affiliation(s)
- N D Goncharova
- Laboratory of Experimental Endocrinology, Research Institute of Medical Primatology, Sochi, Russia.
| | - A M Ermolaeva
- Laboratory of Experimental Endocrinology, Research Institute of Medical Primatology, Sochi, Russia
| | - O A Chigarova
- Laboratory of Experimental Endocrinology, Research Institute of Medical Primatology, Sochi, Russia
| | - T E Oganyan
- Laboratory of Experimental Endocrinology, Research Institute of Medical Primatology, Sochi, Russia
| | - L G Ivanova
- Laboratory of Experimental Endocrinology, Research Institute of Medical Primatology, Sochi, Russia
| | - N V Timoshenko
- Laboratory of Experimental Endocrinology, Research Institute of Medical Primatology, Sochi, Russia
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Rojhani E, Rahmati M, Firouzi F, Saei Ghare Naz M, Azizi F, Ramezani Tehrani F. Polycystic Ovary Syndrome, Subclinical Hypothyroidism, the Cut-Off Value of Thyroid Stimulating Hormone; Is There a Link? Findings of a Population-Based Study. Diagnostics (Basel) 2023; 13:diagnostics13020316. [PMID: 36673125 PMCID: PMC9858596 DOI: 10.3390/diagnostics13020316] [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: 12/08/2022] [Revised: 01/09/2023] [Accepted: 01/11/2023] [Indexed: 01/18/2023] Open
Abstract
Despite solid evidence regarding the association of over-hypothyroidism with polycystic ovary syndrome (PCOS), the relationship between PCOS and subclinical hypothyroidism (SCH) is still a topic of debate. In the present population-based study, we aimed to assess if there is a difference between PCOS and the control group regarding the upper reference limit of thyroid stimulating hormone (TSH). We also aimed to identify the prevalence of SCH in women with PCOS compared to controls. This study was conducted on data collected in the Iranian PCOS prevalence study and the Khuzestan PCOS prevalence study. Participants that met our eligibility criteria were categorized into two groups: PCOS (n = 207) and control (n = 644). Quantile and logistic regression models were used to explore the effect of PCOS status on TSH cut-off values and SCH, respectively. The 95 percentiles of TSH were not significantly different in the PCOS group compared to control ones (6.12 and 6.56 microU/mL, respectively). There was no statistically significant association between PCOS status and SCH (OR adjusted: 1.40; 95%CI: 0.79, 2.50; p = 0.2). The prevalence of SCH and the upper reference limit of TSH were not significantly different in PCOS and controls. Investigation of SCH in women with PCOS might be questionable.
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Affiliation(s)
- Ehsan Rojhani
- Reproductive Endocrinology Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran 1985717413, Iran
| | - Maryam Rahmati
- Reproductive Endocrinology Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran 1985717413, Iran
| | - Faegheh Firouzi
- Tehran Medical Branch, Islamic Azad University, Tehran 19395/1495, Iran
| | - Marzieh Saei Ghare Naz
- Reproductive Endocrinology Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran 1985717413, Iran
| | - Fereidoun Azizi
- Endocrine Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran 1985717413, Iran
| | - Fahimeh Ramezani Tehrani
- Reproductive Endocrinology Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran 1985717413, Iran
- Correspondence: or ; Tel.: +0098-21-22409309
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