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Tapia-Martínez JA, Franco-Colín M, Blas-Valdivia V, Cano-Europa E. The joint effect of congenital hypothyroidism and hypercaloric diet consumption as triggers of type 2 diabetes mellitus. Eur Thyroid J 2022; 11:e210050. [PMID: 34981743 PMCID: PMC9142805 DOI: 10.1530/etj-21-0050] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/09/2021] [Accepted: 11/18/2021] [Indexed: 12/02/2022] Open
Abstract
Introduction Congenital hypothyroidism affects metabolic and thyroid programming, having a deleterious effect on bodyweight regulation promoting metabolic diseases. This work aimed to demonstrate the development of type 2 diabetes mellitus (T2D) in animals with congenital hypothyroidism, only by the consumption of a mild hypercaloric diet in the extrauterine stage. Methods Two groups of female Wistar rats (n = 9): euthyroid and hypothyroid were used. Hypothyroidism was induced by a thyroidectomy with parathyroid reimplantation. Male offsprings post-weaning were divided into four groups (n = 10): euthyroid, hypothyroid, euthyroid + hypercaloric diet, and hypothyroid + hypercaloric diet. The hypercaloric diet consisted of ground commercial feed plus 20% lard and was administered until postnatal week 40. Bodyweight and energy intake were monitored weekly. Also, metabolic and hormonal markers related to cardiovascular risk, insulin resistance, and glucose tolerance were analyzed at week 40. Then, animals were sacrificed to perform the morphometric analysis of the pancreas and adipose tissue. Results T2D was developed in animals fed a hypercaloric diet denoted by the presence of central obesity, hyperphagia, hyperglycemia, dyslipidemia, glucose tolerance, insulin resistance and hypertension, as well as changes in the cytoarchitecture of the pancreas and adipose tissue related to T2D. The results show that congenital hypothyroid animals had an increase in metabolic markers and an elevated cardiovascular risk. Conclusions Congenital hypothyroid animals develop T2D, having the highest metabolic disturbances and a worsened clinical prognosis than euthyroid animals.
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Affiliation(s)
- Jorge Alberto Tapia-Martínez
- Laboratorio de Metabolismo I, Departamento de Fisiología, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Colonia Unidad Profesional Adolfo López Mateos, Delegación Gustavo A. Madero, Ciudad de México, México
- Laboratorio 6, Departamento de Farmacobiología, Centro de Investigación y de Estudios Avanzados-Instituto Politécnico Nacional, Delegación Tlalpan, Ciudad de México, México
| | - Margarita Franco-Colín
- Laboratorio de Metabolismo I, Departamento de Fisiología, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Colonia Unidad Profesional Adolfo López Mateos, Delegación Gustavo A. Madero, Ciudad de México, México
| | - Vanessa Blas-Valdivia
- Laboratorio de Neurobiología, Departamento de Fisiología, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Colonia Unidad Profesional Adolfo López Mateos, Delegación Gustavo A. Madero, Ciudad de México, México
| | - Edgar Cano-Europa
- Laboratorio de Metabolismo I, Departamento de Fisiología, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Colonia Unidad Profesional Adolfo López Mateos, Delegación Gustavo A. Madero, Ciudad de México, México
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Moustafa A. Effect of Light-Dark Cycle Misalignment on the Hypothalamic-Pituitary-Gonadal Axis, Testicular Oxidative Stress, and Expression of Clock Genes in Adult Male Rats. Int J Endocrinol 2020; 2020:1426846. [PMID: 33204259 PMCID: PMC7666629 DOI: 10.1155/2020/1426846] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/03/2020] [Revised: 07/07/2020] [Accepted: 07/13/2020] [Indexed: 01/18/2023] Open
Abstract
This study investigated the influence of circadian misalignment on the male reproductive system. Adult Sprague-Dawley male rats were exposed to prolonged light (20 h light : 4 h dark) or prolonged darkness (4 h light : 20 h dark) for 12 consecutive weeks. The somatic index of seminal vesicles and prostates increased due to prolonged light exposure. Sperm count and motility were enhanced solely by prolonged light exposure, whereas the percentage of sperm abnormalities was reduced by both prolonged light and darkness. The serum levels of reproductive hormones (follicle-stimulating hormone, luteinizing hormone, testosterone, and prolactin) were elevated, and the estradiol level was reduced by long-term light and dark exposure. Testicular total antioxidant capacity and antioxidant enzyme activities were improved, and lipid peroxidation was inhibited following chronic exposure to light or dark. Chronic light exposure increased, but chronic darkness decreased, testicular nitric oxide production. The mRNA expression of the hypothalamic and testicular clock genes including PER1-2, CRY1-2, BMAL1, CLOCK, and Rev-Erbα was altered by circadian disruption. Prolonged light exposure decreased the levels of thyroid hormones and suppressed the mRNA expression of adiponectin receptors 1 and 2. The immunohistochemical expression of proliferating cell nuclear antigen was decreased only by chronic darkness. The present study thus provides new insights into the physiological changes associated with long-term exposure to light or darkness, in which the expression levels of various clock gene mRNAs are modulated, reproductive hormones are increased, and the antioxidant enzyme system is ameliorated as mechanisms of adaptation to chronic circadian disruption.
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Affiliation(s)
- Amira Moustafa
- Department of Physiology, Faculty of Veterinary Medicine, Zagazig University, Zagazig 44519, Egypt
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Norvezh F, Razi Jalali M, Tabandeh MR, Hajikolaei MRH, Gooraninejad S. Serum Apelin-36 alteration in late pregnancy and early lactation of dairy cows and its association with negative energy balance markers. Res Vet Sci 2019; 125:285-289. [PMID: 31326705 DOI: 10.1016/j.rvsc.2019.07.012] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2018] [Revised: 06/13/2019] [Accepted: 07/12/2019] [Indexed: 12/12/2022]
Abstract
The beneficial roles of Apelin on both energy metabolism and insulin sensitivity have been described in previous researches, but it has been little studied in dairy cows. The aim of the present study was to determine the serum Apelin-36 concentration in late pregnancy and early lactation in dairy cows and its association with negative energy balance markers. Thirty Holstein dairy cows (multiparous; n = 15 and primiparous; n = 15) with body condition score 3-3.75 at parturition were selected and blood samples were obtained for metabolic profile one month before and one month after parturition. Apelin-36, glucose, insulin, β-hydroxybutyric acid (BHBA), non-esterified fatty acid (NEFA), cholesterol, triglyceride (TG) and high density lipoproteins (HDL) were measured using commercial kits. BCS and milk production were recorded during the study. There was no effect of parity on Apelin-36, cholesterol, TG, HDL, BHB and NEFA concentrations before lactation; while insulin and glucose levels were higher in primiparous cows than multiparous cows at this period. None of the factors showed any significant difference between multiparous and primiparous cows after lactation. Serum NEFA concentration were increased after parturition, while Apelin-36, insulin and glucose concentrations were decreased after parturition in primiparous and multiparous cows. Significant correlations were observed between serum Apelin and insulin (P = .041, r = 0.672), NEFA (P = .027, r = -0.808) and glucose (P = .037, r = 0.757). In conclusion, our results showed that serum Apelin-36 concentration decreased after parturition in dairy cow. Alteration of Apelin-36 secretion after parturition may represent an endocrine adaptation in dairy cow during the lactating period.
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Affiliation(s)
- Farideh Norvezh
- Department of Clinical Sciences, Faculty of Veterinary Medicine, Shahid Chamran University of Ahvaz, Ahvaz, Iran
| | - Mohammad Razi Jalali
- Department of Clinical Sciences, Faculty of Veterinary Medicine, Shahid Chamran University of Ahvaz, Ahvaz, Iran
| | - Mohammad Reza Tabandeh
- Department of Basic Sciences, Division of Biochemistry and Molecular Biology, Faculty of Veterinary Medicine, Shahid Chamran University of Ahvaz, Ahvaz, Iran.
| | | | - Saad Gooraninejad
- Department of Clinical Sciences, Faculty of Veterinary Medicine, Shahid Chamran University of Ahvaz, Ahvaz, Iran
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Ranjbar Kohan N, Nazifi S, Tabandeh MR, Ansari Lari M. Effect of L-Carnitine Supplementation on Apelin and Apelin Receptor (Apj) Expression in Cardiac Muscle of Obese Diabetic Rats. CELL JOURNAL 2018; 20:427-434. [PMID: 29845798 PMCID: PMC6005003 DOI: 10.22074/cellj.2018.5408] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/18/2017] [Accepted: 10/05/2017] [Indexed: 12/17/2022]
Abstract
Objective L-carnitine (LC) has been shown to protect cardiac metabolism in diabetes patients with cardiovascular diseases (CVDs). Apelin, a newly discovered adipocytokines, is an important regulator of cardiac muscle function; however, the role of the level of expression of Apelin axis in improvement of cardiac function by LC in diabetic patients, is not clear. In the present study, obese insulin-resistant rats were used to determine the effect of LC, when given orally with a high-calorie diet, on Apelin and Apelin receptor (Apj) expression in cardiac muscle. Materials and Methods In this experimental study, rats were fed with high-fat/high-carbohydrate diet for five weeks and subsequently were injected with streptozotocin 30 mg/kg for induction of obesity and insulin resistance. After confirming the induction of diabetes (serum glucose above 7.5 mmol/L), the animals received LC 300 mg/kg in drinking water for 28 days. On days 0, 14 and 28 after treatment, cardiac Apelin and Apj gene expression was evaluated by real time polymerase chain reaction (PCR) analysis. Serum levels of insulin, Apelin, glucose, tumor necrosis factor-α (TNF-α), interleukin-1β (IL-1β) and the homeostasis model assessment of insulin resistance (HOMA-IR) were also measured using commercial kits. Results Cardiac Apelin and Apj expression and serum Apelin were increased in obese rats, while LC supplementation decreased the serum levels of Apelin and down-regulated Apelin and Apj expression in cardiac muscle. These changes were associated with reduced insulin resistance markers and serum inflammatory factors and improved lipid profile. Conclusion We concluded that LC supplementation could attenuate the over-expression of Apelin axis in heart of diabetic rats, a novel mechanism by which LC improves cardiovascular complications in diabetic patients.
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Affiliation(s)
- Neda Ranjbar Kohan
- Department of Clinical Studies, School of Veterinary Medicine, Shiraz University, Shiraz, Iran
| | - Saeed Nazifi
- Department of Clinical Studies, School of Veterinary Medicine, Shiraz University, Shiraz, Iran
| | - Mohammad Reza Tabandeh
- Department of Biochemistry and Molecular Biology, Faculty of Veterinary Medicine, Shahid Chamran University of Ahvaz, Ahvaz, Iran.,Stem Cells and Transgenic Technology Research Center, Shahid Chamran University of Ahvaz, Ahvaz, Iran. Electronic Address:
| | - Maryam Ansari Lari
- Department of Food Hygiene, School of Veterinary Medicine, Shiraz University, Shiraz, Iran
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Gong N, Gao C, Chen X, Wang Y, Tian L. Adipokine expression and endothelial function in subclinical hypothyroidism rats. Endocr Connect 2018; 7:295-304. [PMID: 29440225 PMCID: PMC5811986 DOI: 10.1530/ec-18-0007] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/10/2018] [Accepted: 01/12/2018] [Indexed: 01/11/2023]
Abstract
The purpose of our study was to observe adipokine expression and endothelial function in subclinical hypothyroidism (sHT) rats and to determine whether levothyroxine (LT4) treatment affects these changes. Sixty-five male Wistar rats were randomly divided into five groups: the control group; sHT A, B and C groups and the sHT + T4 group. The sHT rats were induced by methimazole (MMI) and the sHT + T4 rats were administered LT4 treatment after 8 weeks of MMI administration. Thyroid function and lipid levels were measured using radioimmunoassays and enzymatic colorimetric methods, respectively. Serum adiponectin (APN), chemerin, TNF-α, endothelin (ET-1) and nitric oxide (NO) levels were measured using ELISA kits and a nitric-reductive assay. The expression of APN, chemerin and TNF-α in visceral adipose tissue (VAT) was measured in experimental rats using RT-PCR and Western blotting. Hematoxylin-eosin (HE) staining was used to observe changes in adipose tissue. The sHT rats had significantly higher levels of thyroid-stimulating hormone (TSH), TNF-α, chemerin, ET-1, total cholesterol (TC) and low-density lipoprotein cholesterol (LDL-C) and lower levels of APN and NO than those in control and sHT + T4 rats. Based on Pearson correlation analysis, the levels of chemerin, TNF-α, ET-1, LDL-C, TC and triglyceride (TG) were positively correlated with TSH, but APN and NO levels were negatively correlated with TSH. These findings demonstrated that high TSH levels contribute to the changes of adipokines and endothelial dysfunction in sHT, but LT4 treatment ameliorates those changes.
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Affiliation(s)
- Ningning Gong
- Department of EndocrinologyGansu Provincial Hospital, Lanzhou, China
- Department of Clinical MedicineGansu University of Chinese Medicine, Lanzhou, Gansu, China
| | - Cuixia Gao
- Department of Ultrasonic DiagnosisGansu Provincial Hospital, Lanzhou, China
| | - Xuedi Chen
- Department of EndocrinologyGansu Provincial Hospital, Lanzhou, China
| | - Yu Wang
- Department of EndocrinologyGansu Provincial Hospital, Lanzhou, China
| | - Limin Tian
- Department of EndocrinologyGansu Provincial Hospital, Lanzhou, China
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Kim MW, Abid NB, Jo MH, Jo MG, Yoon GH, Kim MO. Suppression of adiponectin receptor 1 promotes memory dysfunction and Alzheimer's disease-like pathologies. Sci Rep 2017; 7:12435. [PMID: 28963462 PMCID: PMC5622055 DOI: 10.1038/s41598-017-12632-9] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2017] [Accepted: 09/08/2017] [Indexed: 02/06/2023] Open
Abstract
Recent studies on neurodegeneration have focused on dysfunction of CNS energy metabolism as well as proteinopathies. Adiponectin (ADPN), an adipocyte-derived hormone, plays a major role in the regulation of insulin sensitivity and glucose homeostasis in peripheral organs via adiponectin receptors. In spite of accumulating evidence that adiponectin has neuroprotective properties, the underlying role of adiponectin receptors has not been illuminated. Here, using gene therapy-mediated suppression with shRNA, we found that adiponectin receptor 1 (AdipoR1) suppression induces neurodegeneration as well as metabolic dysfunction. AdipoR1 knockdown mice exhibited increased body weight and abnormal plasma chemistry and also showed spatial learning and memory impairment in behavioural studies. Moreover, AdipoR1 suppression resulted in neurodegenerative phenotypes, diminished expression of the neuronal marker NeuN, and increased expression and activity of caspase 3. Furthermore, AD-like pathologies including insulin signalling dysfunction, abnormal protein aggregation and neuroinflammatory responses were highly exhibited in AdipoR1 knockdown groups, consistent with brain pathologies in ADPN knockout mice. Together, these results suggest that ADPN-AdipoR1 signalling has the potential to alleviate neurodegenerative diseases such as Alzheimer’s diseases.
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Affiliation(s)
- Min Woo Kim
- Division of Life Science and Applied Life Science (BK 21 plus), College of Natural Sciences, Gyeongsang National University, Jinju, Republic of Korea
| | - Noman Bin Abid
- Division of Life Science and Applied Life Science (BK 21 plus), College of Natural Sciences, Gyeongsang National University, Jinju, Republic of Korea
| | - Myeong Hoon Jo
- Division of Life Science and Applied Life Science (BK 21 plus), College of Natural Sciences, Gyeongsang National University, Jinju, Republic of Korea
| | - Min Gi Jo
- Division of Life Science and Applied Life Science (BK 21 plus), College of Natural Sciences, Gyeongsang National University, Jinju, Republic of Korea
| | - Gwang Ho Yoon
- Division of Life Science and Applied Life Science (BK 21 plus), College of Natural Sciences, Gyeongsang National University, Jinju, Republic of Korea
| | - Myeong Ok Kim
- Division of Life Science and Applied Life Science (BK 21 plus), College of Natural Sciences, Gyeongsang National University, Jinju, Republic of Korea.
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Atıci E, Mogulkoc R, Baltaci AK, Menevse E. The effect of thyroid dysfunction on nesfatin-1 and adiponectin levels in rats. Horm Mol Biol Clin Investig 2017; 32:/j/hmbci.ahead-of-print/hmbci-2017-0033/hmbci-2017-0033.xml. [PMID: 28796641 DOI: 10.1515/hmbci-2017-0033] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2017] [Accepted: 06/12/2017] [Indexed: 11/15/2022]
Abstract
Background Changes in thyroid hormone concentrations may affect adiponectin concentrations through various mechanisms. A molecule released primarily from the fat cells adiposities; adiponectin has important effects on the regulation of body weight. Aim The present study aimed to explore the effects of experimental thyroid dysfunction and its treatment on nesfatin-1 and adiponectin levels in rats. Methods The study included 40 adult male Sprague-Dawley rats which were grouped as follows: (1) control; (2) hypothyroidism [hypothyroidism was induced by intraperitoneal injection of 10 mg/kg/day propylthiouracil (PTU) for 3 weeks]; (3) hypothyroidism + thyroxine group [after hypothyroidism was induced by 2-week PTU injection, they were treated with high-dose L-thyroxine (1.5 mg/kg/day) for 1 week]; (4) hyperthyroidism [hyperthyroidism was induced by 3-weeks' thyroxine injection (0.3 mg/kg/day)]; (5) hyperthyroidism + PTU (after hyperthyroidism was induced by 2-weeks' thyroxine injection, the animals were given 10 mg/kg/day PTU for 1 week). Blood samples taken at the end of the study were analyzed to measure nesfatin-1 and adiponectin levels. Results It was found that nesfatin-1 levels increased in hypothyroidism, while adiponectin levels decreased (p < 0.001). In experimental hyperthyroidism, on the other hand, both nesfatin-1 and adiponectin levels were found significantly elevated (p < 0.001). Conclusion The results of the study indicate that nesfatin-1 and adiponectin levels were modified considerably in hypo- and hyperthyroidism, whereas with the restoration of the thyroid function, modified hormone levels went back to normal.
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Affiliation(s)
- Emine Atıci
- Health Sciences Faculty, Baskent University, Ankara, Turkey
| | - Rasim Mogulkoc
- Department of Physiology, Medical School, Selcuk University, Konya, Turkey
| | | | - Esma Menevse
- Department of Biochemistry, Selcuk University, Medical School, Konya, Turkey
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Gardell AM, von Hippel FA, Adams EM, Dillon DM, Petersen AM, Postlethwait JH, Cresko WA, Buck CL. Exogenous iodide ameliorates perchlorate-induced thyroid phenotypes in threespine stickleback. Gen Comp Endocrinol 2017; 243:60-69. [PMID: 27815158 PMCID: PMC5318228 DOI: 10.1016/j.ygcen.2016.10.014] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/02/2016] [Revised: 10/07/2016] [Accepted: 10/30/2016] [Indexed: 12/25/2022]
Abstract
Perchlorate is a ubiquitous environmental contaminant that has widespread endocrine disrupting effects in vertebrates, including threespine stickleback (Gasterosteus aculeatus). The target of perchlorate is thyroid tissue where it induces changes in the organization, activation, and morphology of thyroid follicles and surrounding tissues. To test the hypothesis that some phenotypes of perchlorate toxicity are not mediated by thyroid hormone, we chronically exposed stickleback beginning at fertilization to perchlorate (10, 30, 100ppm) or control water with and without supplementation of either iodide or thyroxine (T4). Stickleback were sampled across a one-year timespan to identify potential differences in responses to treatment combinations before and after sexual maturation. We found that most thyroid histomorphological phenotypes induced by perchlorate (follicle proliferation, reduced follicle area (adults only), colloid depletion, thyrocyte hypertrophy (subadults only)) were significantly ameliorated by exogenous iodide supplementation. In contrast, treatment with exogenous T4 did not correct any of the thyroid-specific histopathologies induced by perchlorate. Whole-body thyroid hormone concentrations were not significantly affected by perchlorate exposure; however, supplementation with iodide and T4 significantly increased T4 concentrations. This study also revealed an increased erythrocyte area in the thyroid region of perchlorate-exposed adults, while lipid droplet number increased in perchlorate-exposed subadults. Increased erythrocyte area was ameliorated by both iodide and T4, while neither supplement was able to correct lipid droplet number. Our finding on lipid droplets indicates that exposure to perchlorate in early development may have obesogenic effects.
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Affiliation(s)
- Alison M Gardell
- Department of Biological Sciences, University of Alaska Anchorage, Anchorage, AK 99508, USA
| | - Frank A von Hippel
- Department of Biological Sciences, Northern Arizona University, Flagstaff, AZ 86011, USA.
| | - Elise M Adams
- Department of Biological Sciences, Northern Arizona University, Flagstaff, AZ 86011, USA
| | - Danielle M Dillon
- Center for Bioengineering Innovation & Department of Biological Sciences, Northern Arizona University, Flagstaff, AZ 86011, USA
| | - Ann M Petersen
- Department of Integrative Biology, Oregon State University, Cascades, Bend, OR 97703, USA
| | | | - William A Cresko
- Institute of Ecology and Evolution, University of Oregon, Eugene, OR 97403, USA
| | - C Loren Buck
- Center for Bioengineering Innovation & Department of Biological Sciences, Northern Arizona University, Flagstaff, AZ 86011, USA.
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Ozdemir D, Dagdelen S, Usman A. Serum Adiponectin Levels and Changes in Glucose Metabolism before and after Treatment for Thyroid Dysfunction. Intern Med 2015; 54:1849-57. [PMID: 26234224 DOI: 10.2169/internalmedicine.54.0668] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
OBJECTIVE Adiponectin is an adipokine which is known to decrease in individuals associated with obesity and insulin resistance. In this study, we aimed to investigate the serum adiponectin levels and glucose metabolism in patients with thyroid dysfunction before and after treatment. METHODS Newly diagnosed overt hypothyroid (n=20) and thyrotoxic (n=23) patients and healthy controls (n=20) with a body mass index of <30 kg/m(2) were evaluated prospectively. Patients with a known state of insulin resistance, including prediabetes and overt diabetes, and individuals with chronic diseases were excluded. Thyroid function and fasting plasma glucose (FPG), insulin, homeostatic model assessment (HOMA) insulin resistance (HOMA-IR) and HOMA-beta cell function (HOMA-beta), lipid and adiponectin levels were investigated in the basal state and after the restoration of euthyroidism. RESULTS The basal fasting FPG levels were lower in the hypothyroid patients than the control subjects (p=0.02) and similar between the thyrotoxic patients and control subjects (p=0.127). The basal HOMA-beta levels were higher in the patients with hypothyroidism than in those with thyrotoxicosis (p=0.015). Following the restoration of euthyroidism, the FPG levels significantly increased in the hypothyroid patients (p=0.002) and decreased in the thyrotoxic (p=0.001) patients. The basal plasma adiponectin levels were 14.55±8.4 mcg/mL, 13.79±9.13 mcg/mL and 11.68±6.0 mcg/mL in the hypothyroid and thyrotoxic patients and healthy controls, respectively (p=0.503). The adiponectin levels decreased significantly in the patients with hypothyroidism (p=0.047), whereas they did not change in the patients with thyrotoxicosis (p=0.770) after achieving euthyroidism. CONCLUSION In this study, following the restoration of euthyroidism, the FPG levels increased in the hypothyroidism patients and decreased in the thyrotoxicosis patients, despite the lack of changes in the HOMA-IR and HOMA-beta levels. Meanwhile, the hypothyroid, thyrotoxic and euthyroid subjects had similar basal adiponectin levels, and a significant decrease in the adiponectin levels was observed after treatment for hypothyroidism, despite the absence of changes after treatment for thyrotoxicosis, indicating the need for further studies with a larger sample size.
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Affiliation(s)
- Didem Ozdemir
- Department of Endocrinology and Metabolism, Hacettepe University School of Medicine, Turkey
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Okan Yildiz B, Yazgan Aksoy D, Harmanci A, Unluturk U, Cinar N, Isildak M, Usman A, Bayraktar M. Effects of L-Thyroxine Therapy on Circulating Leptin and Adiponectin Levels in Subclinical Hypothyroidism: A Prospective Study. Arch Med Res 2013; 44:317-20. [DOI: 10.1016/j.arcmed.2013.04.010] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2012] [Accepted: 04/25/2013] [Indexed: 01/07/2023]
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Cinar N, Gurlek A. Association between novel adipocytokines adiponectin, vaspin, visfatin, and thyroid: An experimental and clinical update. Endocr Connect 2013; 2:R30-8. [PMID: 24145612 PMCID: PMC3847914 DOI: 10.1530/ec-13-0061] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Adipose tissue secretes a variety of active biological substances, called adipocytokines, that act in an autocrine, paracrine, and endocrine manner. They have roles in appetite control, thermogenesis, and thyroid and reproductive functions. All these molecules may lead to local and generalized inflammation, mediating obesity-associated vascular disorders including hypertension, diabetes, atherosclerosis, and insulin resistance. Thyroid dysfunction is associated with changes in body weight, thermogenesis, and energy expenditure. The connections between cardiovascular risk factors such as dyslipidemia, impaired glucose tolerance, insulin resistance, atherosclerosis, and thyroid dysfunction have been reported in several studies. The adipocytokines serve as causative or protective factors in the development of these disorders in the states of thyroid dysfunction. Abnormal levels of adipocytokines (adiponectin (ADP), leptin, resistin, vaspin, and visfatin) in hypo- and hyperthyroidism have been reported with controversial results. This review aims to update the implication of novel adipokines ADP, vaspin, and visfatin in thyroid dysfunction.
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