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Florido Neto AR, Agostini L, Silva LPD, Nunes MT. Therapeutical Potential of T3 as Adjuvant Therapy in Male Alloxan-induced Diabetic Rats. Endocrinology 2024; 165:bqae066. [PMID: 38862394 DOI: 10.1210/endocr/bqae066] [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: 12/13/2023] [Revised: 06/03/2024] [Accepted: 06/06/2024] [Indexed: 06/13/2024]
Abstract
Alloxan-induced diabetic rats present with hypothyroidism. When treated with triiodothyronine (T3), glycemia and proinflammatory cytokine expression are downregulated, improving insulin sensitivity. The effectiveness of associating T3 with insulin (replacement dose [6 U] and [3 U]) in controlling glycemia was investigated in this experimental model. Male Wistar rats were made diabetic by alloxan injection and sorted into groups treated or not with insulin (3 or 6 U) associated or not with T3 (1.5 µg 100 g-1 BW) for 28 days. Nondiabetic rats constituted the control group. Fasting glycemia, glucose decay rate, and thyrotropin (TSH) were measured in the blood/serum of all animals. Immunoblotting was used to assess total GLUT4 expression in skeletal muscles and epididymal white adipose tissue. Cytokine and nuclear factor-κB (NF-κB) expression were measured in these tissues and liver. Diabetic rats presented with increased fasting glycemia, inflammatory cytokines, and NF-κB expression, TSH levels, and insulin resistance. In diabetic rats treated with T3 and/or insulin, these parameters were decreased, whereas GLUT4 and anti-inflammatory cytokine expression were increased. T3 combined with 3-U insulin restored the parameters to values of the control group and was more effective at controlling glycemia than 6-U insulin. Thus, a combination of T3 and insulin might represent a promising strategy for diabetes management since it reduces the insulin requirement by half and improves glycemic control of diabetic rats, which could postpone insulin resistance that develops with chronic insulin administration. These findings open a perspective for using thyroid analogues that provide tissue-specific effects, which might result in a potentially more effective treatment of diabetes.
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Affiliation(s)
- Armando Ribeiro Florido Neto
- Department of Physiology and Biophysics, Institute of Biomedical Sciences, University of São Paulo, 05508-000, São Paulo, SP, Brazil
| | - Lucas Agostini
- Department of Physiology and Biophysics, Institute of Biomedical Sciences, University of São Paulo, 05508-000, São Paulo, SP, Brazil
| | - Luciano Pedro da Silva
- Department of Physiology and Biophysics, Institute of Biomedical Sciences, University of São Paulo, 05508-000, São Paulo, SP, Brazil
| | - Maria Tereza Nunes
- Department of Physiology and Biophysics, Institute of Biomedical Sciences, University of São Paulo, 05508-000, São Paulo, SP, Brazil
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Gholve CS, Shete Y, Rakshit S, Kulkarni S. Evaluation of Pendrin Expression Using Nuclear Imaging Modalities and Immunohistochemistry in Animal Thyroid Cancer Model. Indian J Nucl Med 2023; 38:328-333. [PMID: 38390539 PMCID: PMC10880853 DOI: 10.4103/ijnm.ijnm_46_23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2023] [Revised: 05/19/2023] [Accepted: 05/29/2023] [Indexed: 02/24/2024] Open
Abstract
Context The impaired ability of thyroid cancer (TC) cells to uptake and concentrate iodine represents a major therapeutic challenge in malignant TC management. This has been reported probably due to reduced or loss of expression of pendrin in thyroid tumors. Aims In view of this, we evaluated the pendrin expression in the chemically induced (using N-bis[2-hydroxypropyl] nitrosamine [DHPN]) TC model in Wistar rats. Methods Uptake in the thyroid gland was evaluated by positron emission tomography with computed tomography (PET-CT) and scintigraphy imaging. Further histopathology (HP) and immunohistochemistry (IHC) were performed for confirming malignancy. Results The altered uptake in the thyroid gland was observed by PET-CT and scintigraphy imaging. Significant pathological changes in the thyroid were observed using 2-deoxy-2-(fluorine-18) fluoro-D-glucose PET-CT, technetium-99m pertechnetate imaging, and reduced iodine-131 uptake (n = 4) in DHPN-induced animals compared to control indicative of thyroid cell proliferation. In treated groups, tissue HP revealed hyperplastic follicular to papillary cell proliferation with variable mitotic activity. The malignant nature of the tissue and variable uptake of the tracer were further reconfirmed by IHC. IHC revealed reduced pendrin expression in malignant thyroid tissue. Conclusions Hence, nuclear imaging techniques can be of aid in the early identification and evaluation of cellular changes during the early development of tumor models in laboratory animals. In conclusion, our study reveals that pendrin expression plays a vital role in thyroid uptake, and its reduction was observed in TC in a chemically induced TC model.
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Affiliation(s)
| | - Yogita Shete
- Radiation Medicine Centre, Bhabha Atomic Research Centre, Mumbai, Maharashtra, India
| | - Sutapa Rakshit
- Radiation Medicine Centre, Bhabha Atomic Research Centre, Mumbai, Maharashtra, India
| | - Savita Kulkarni
- Radiation Medicine Centre, Bhabha Atomic Research Centre, Mumbai, Maharashtra, India
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Jing L, Zhang Q. Intrathyroidal feedforward and feedback network regulating thyroid hormone synthesis and secretion. Front Endocrinol (Lausanne) 2022; 13:992883. [PMID: 36187113 PMCID: PMC9519864 DOI: 10.3389/fendo.2022.992883] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Accepted: 08/24/2022] [Indexed: 11/16/2022] Open
Abstract
Thyroid hormones (THs), including T4 and T3, are produced and released by the thyroid gland under the stimulation of thyroid-stimulating hormone (TSH). The homeostasis of THs is regulated via the coordination of the hypothalamic-pituitary-thyroid axis, plasma binding proteins, and local metabolism in tissues. TH synthesis and secretion in the thyrocytes-containing thyroid follicles are exquisitely regulated by an elaborate molecular network comprising enzymes, transporters, signal transduction machineries, and transcription factors. In this article, we synthesized the relevant literature, organized and dissected the complex intrathyroidal regulatory network into structures amenable to functional interpretation and systems-level modeling. Multiple intertwined feedforward and feedback motifs were identified and described, centering around the transcriptional and posttranslational regulations involved in TH synthesis and secretion, including those underpinning the Wolff-Chaikoff and Plummer effects and thyroglobulin-mediated feedback regulation. A more thorough characterization of the intrathyroidal network from a systems biology perspective, including its topology, constituent network motifs, and nonlinear quantitative properties, can help us to better understand and predict the thyroidal dynamics in response to physiological signals, therapeutic interventions, and environmental disruptions.
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Affiliation(s)
- Li Jing
- Department of Toxicology and Hygienic Chemistry, School of Public Health, Capital Medical University, Beijing, China
| | - Qiang Zhang
- Gangarosa Department of Environmental Health, Rollins School of Public Health, Emory University, Atlanta, GA, United States
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Excess iodide-induced reactive oxygen species elicit iodide efflux via β-tubulin-associated ClC-3 in thyrocytes. Biochem J 2022; 479:629-640. [PMID: 35175311 DOI: 10.1042/bcj20210709] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2021] [Revised: 01/30/2022] [Accepted: 02/17/2022] [Indexed: 11/17/2022]
Abstract
Iodide (I-) is crucial to thyroid function, and its regulation in thyrocytes involves ion transporters and reactive oxygen species (ROS). However, the extent of 2Cl-/H+ exchanger (ClC-3) involvement in the iodide (I-) efflux from thyrocytes remains unclear. Therefore, we examined the effects of ClC-3 on I- efflux. ClC-3 expression was found to significantly alter the serum TT3 and TT4 concentrations in mice. We further found that excess I- stimulation affected ClC-3 expression, distribution, and I- efflux in FRTL-5 cells. Immunofluorescence analyses indicated that ClC-3 mainly accumulated in the cell membrane and co-localized with β-tubulins after 24 h of excess I- treatment, and that this process depended on ROS production. Thus, ClC-3 may be involved in I- efflux at the apical pole of thyrocytes via excess I--induced ROS production and β-tubulin polymerization. Our results reveal novel insights into the role of ClC-3 in I- transport and thyroid function.
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Gaouaoui-Azouaou H, L'Homme B, Benadjaoud MA, Sache-Aloui A, Granger R, Voyer F, Lestaevel P, Gruel G, Caire-Maurisier F, Crambes C, Dare-Doyen S, Benderitter M, Souidi M. Protection and safety of a repeated dosage of KI for iodine thyroid blocking during pregnancy. JOURNAL OF RADIOLOGICAL PROTECTION : OFFICIAL JOURNAL OF THE SOCIETY FOR RADIOLOGICAL PROTECTION 2022; 42:011512. [PMID: 34700314 DOI: 10.1088/1361-6498/ac336e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2021] [Accepted: 10/26/2021] [Indexed: 06/13/2023]
Abstract
In case of nuclear power plant accidents resulting in the release of radioactive iodine (131I) in large amounts, a single intake of stable iodine is recommended in order to prevent131I fixation to the thyroid gland. However, in situations of prolonged exposure to131I (e.g. Fukushima-Daiichi natural and nuclear disaster), repetitive administration of iodine may be necessary to ensure adequate protection, with acceptable safety in vulnerable populations including pregnant women. Here we conducted toxicological studies on adult rats progeny following prolonged exposure to potassium iodide (KI)in utero. Pregnant Wistar rats were treated with 1 mg kg d-1KI or saline water for 2 or 4 d either between gestation days gestational day (GD) GD 9-12, or GD13-16. Plasma samples from the progeny were tested 30 d post-weaning for clinical biochemistry, thyroid hormones, and anti-thyroid antibody levels. Thyroid and brain were collected for gene expression analysis. The hormonal status was similar for the mothers in all experimental conditions. In the offspring, while thyroid-stimulating hormone and anti-thyroid peroxidase (anti-TPO) antibody levels were similar in all groups, a significant increase of FT3 and FT4 levels was observed in GD9-GD10 and in GD13-GD14 animals treated for 2 d, respectively. In addition, FT4 levels were mildly decreased in 4 d treated GD13-16 individuals. Moreover, a significant decrease in the expression level of thyroid genes involved in iodide metabolism, TPO and apical iodide transporter, was observed in GD13-GD14 animals treated for 2 d. We conclude that repeated KI administration for 2-4 d during gestation did not induce strong thyroid toxicity.
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Affiliation(s)
- Hayat Gaouaoui-Azouaou
- Institut de radioprotection et de sûreté Nucléaire (IRSN), PSE-SANTE, 92290 Fontenay-aux-Roses, France
| | - Bruno L'Homme
- Institut de radioprotection et de sûreté Nucléaire (IRSN), PSE-SANTE, 92290 Fontenay-aux-Roses, France
| | - Mohamed Amine Benadjaoud
- Institut de radioprotection et de sûreté Nucléaire (IRSN), PSE-SANTE, 92290 Fontenay-aux-Roses, France
| | - Amandine Sache-Aloui
- Institut de radioprotection et de sûreté Nucléaire (IRSN), PSE-SANTE, 92290 Fontenay-aux-Roses, France
| | - Romain Granger
- Institut de radioprotection et de sûreté Nucléaire (IRSN), PSE-SANTE, 92290 Fontenay-aux-Roses, France
| | - Frederic Voyer
- Institut de radioprotection et de sûreté Nucléaire (IRSN), PSE-SANTE, 92290 Fontenay-aux-Roses, France
| | - Philippe Lestaevel
- Institut de radioprotection et de sûreté Nucléaire (IRSN), PSE-SANTE, 92290 Fontenay-aux-Roses, France
| | - Gaëtan Gruel
- Institut de radioprotection et de sûreté Nucléaire (IRSN), PSE-SANTE, 92290 Fontenay-aux-Roses, France
| | - François Caire-Maurisier
- Pharmacie Centrale des Armées, Direction des Approvisionnement en produits de santé des armées, 45404 Fleury-les Aubrais, France
| | - Caroline Crambes
- Pharmacie Centrale des Armées, Direction des Approvisionnement en produits de santé des armées, 45404 Fleury-les Aubrais, France
| | - Stephanie Dare-Doyen
- Institut de radioprotection et de sûreté Nucléaire (IRSN), PSE-SANTE, 92290 Fontenay-aux-Roses, France
| | - Marc Benderitter
- Institut de radioprotection et de sûreté Nucléaire (IRSN), PSE-SANTE, 92290 Fontenay-aux-Roses, France
| | - Maâmar Souidi
- Institut de radioprotection et de sûreté Nucléaire (IRSN), PSE-SANTE, 92290 Fontenay-aux-Roses, France
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Cohen DPA, Lebsir D, Benderitter M, Souidi M. A systems biology approach to propose a new mechanism of regulation of repetitive prophylaxis of stable iodide on sodium/iodide symporter (NIS). Biochimie 2019; 162:208-215. [PMID: 31071356 DOI: 10.1016/j.biochi.2019.04.024] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2019] [Accepted: 04/29/2019] [Indexed: 01/27/2023]
Abstract
Our group showed that repetitive dose of potassium iodide (KI) for eight days offers an efficient protection for exposure to repeated radioactive emissions without adverse effects on adult rats. However, differential expression of genes implicated in Wolff-Chaikoff effect was observed. To understand the Wolff-Chaikoff regulation and its molecular constituents during repetitive administration of KI, a biochemical reaction network was constructed as a "geographical" map of the thyrocyte depicting iodide and thyroid hormone synthesis. Path analysis of the network has been performed to investigate the presence of a regulatory circuit of the node iodide to the node "nis transcription". NIS is responsible for the uptake of KI and plays an important role in the Wolff-Chaikoff effect. The map is a source for the most updated information about iodide and thyroid hormone metabolism. Based on this map, we propose a hypothesis that shows a putative mechanism behind NIS regulation and KI uptake.
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Affiliation(s)
- David P A Cohen
- Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PSE-SANTE/SESANE/LRTOX, 92262, Fontenay-aux-Roses, France
| | - Dalila Lebsir
- Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PSE-SANTE/SESANE/LRTOX, 92262, Fontenay-aux-Roses, France
| | - Marc Benderitter
- Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PRP-SANTE/SERAMED, 92262, Fontenay-aux-Roses, France
| | - Maâmar Souidi
- Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PRP-SANTE/SERAMED, 92262, Fontenay-aux-Roses, France.
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Bargi-Souza P, Goulart-Silva F, Nunes MT. Posttranscriptional actions of triiodothyronine on Tshb expression in TαT1 cells: New insights into molecular mechanisms of negative feedback. Mol Cell Endocrinol 2018; 478:45-52. [PMID: 30031103 DOI: 10.1016/j.mce.2018.07.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/13/2018] [Revised: 06/10/2018] [Accepted: 07/13/2018] [Indexed: 11/28/2022]
Abstract
Rapid actions of triiodothyronine (T3) on thyrotropin (TSH) synthesis and secretion have been described in hypothyroid male rats. However, the molecular mechanisms remain unknown. TαT1 cells, a thyrotroph cell line, was used herein to characterize the possible non-genomic actions of T3 on the expression of alpha (Cga) and Tshb genes, and the posttranscriptional processing and translation of both transcripts. The involvement of αVβ3 integrin was also assessed. T3 quickly reduced Tshb mRNA content, poly(A) tail length and its association with ribosomes. The effect of T3 on Tshb gene expression was detected even in the presence of a transcription inhibitor. The decrease in Tshb mRNA content and polyadenylation depend on T3 interaction with αVβ3 integrin, while T3 reduced Cga mRNA content by transcriptional action. The translational rate of both transcripts was reduced by a mechanism, which does not depend on T3-αVβ3 integrin interaction. Results indicate that, in parallel with the inhibitory transcriptional action in Cga and Tshb gene expression, T3 rapidly triggers additional posttranscriptional mechanisms, reducing the TSH synthesis. These non-genomic actions partially depend on T3-αVβ3 integrin interaction at the plasma membrane of thyrotrophs and add new insights to the molecular mechanisms involved in T3 negative feedback loop.
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Affiliation(s)
- Paula Bargi-Souza
- Department of Physiology and Biophysics of the Institute of Biomedical Sciences, University of São Paulo, São Paulo, SP, CEP 05508-000, Brazil
| | - Francemilson Goulart-Silva
- Department of Physiology and Biophysics of the Institute of Biomedical Sciences, University of São Paulo, São Paulo, SP, CEP 05508-000, Brazil
| | - Maria Tereza Nunes
- Department of Physiology and Biophysics of the Institute of Biomedical Sciences, University of São Paulo, São Paulo, SP, CEP 05508-000, Brazil.
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8
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Lebsir D, Manens L, Grison S, Lestaevel P, Ebrahimian T, Suhard D, Phan G, Dublineau I, Tack K, Benderitter M, Pech A, Jourdain JR, Souidi M. Effects of repeated potassium iodide administration on genes involved in synthesis and secretion of thyroid hormone in adult male rat. Mol Cell Endocrinol 2018; 474:119-126. [PMID: 29496566 DOI: 10.1016/j.mce.2018.02.017] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/12/2017] [Revised: 02/23/2018] [Accepted: 02/23/2018] [Indexed: 12/23/2022]
Abstract
BACKGROUND A single dose of potassium iodide (KI) is recommended to reduce the risk of thyroid cancer during nuclear accidents. However in case of prolonged radioiodine exposure, more than one dose of KI may be necessary. This work aims to evaluate the potential toxic effect of repeated administration of KI. METHODS Adult Wistar rats received an optimal dose of KI 1 mg/kg over a period of 1, 4 or 8 days. RESULTS hormonal status (TSH, FT4) of treated rats was unaffected. Contrariwise, a sequential Wolff-Chaikoff effect was observed, resulting in a prompt decrease of NIS and MCT8 mRNA expression (-58% and -26% respectively), followed by a delayed decrease of TPO mRNA expression (-33%) in conjunction with a stimulation of PDS mRNA expression (+62%). CONCLUSION we show for the first time that repeated administration of KI at 1 mg/kg/24h doesn't cause modification of thyroid hormones level, but leads to a reversible modification of the expression of genes involved in the synthesis and secretion of thyroid hormones.
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Affiliation(s)
- Dalila Lebsir
- Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PRP-HOM, SRBE, LRTOX, 92262 Fontenay-aux-Roses, France
| | - Line Manens
- Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PRP-HOM, SRBE, LRTOX, 92262 Fontenay-aux-Roses, France
| | - Stephane Grison
- Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PRP-HOM, SRBE, LRTOX, 92262 Fontenay-aux-Roses, France
| | - Philippe Lestaevel
- Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PRP-HOM, SRBE, LRTOX, 92262 Fontenay-aux-Roses, France
| | - Teni Ebrahimian
- Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PRP-HOM, SRBE, LRTOX, 92262 Fontenay-aux-Roses, France
| | - David Suhard
- Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PRP-HOM, SDI, LRC, 92262 Fontenay-aux-Roses, France
| | - Guillaume Phan
- Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PRP-HOM, SDI, LRC, 92262 Fontenay-aux-Roses, France
| | - Isabelle Dublineau
- Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PRP-HOM, 92262 Fontenay-aux-Roses, France
| | - Karine Tack
- Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PRP-HOM, SRBE, LRTOX, 92262 Fontenay-aux-Roses, France
| | - Marc Benderitter
- Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PRP-HOM, 92262 Fontenay-aux-Roses, France
| | - Annick Pech
- Pharmacie centrale des armées, Direction des Approvisionnement en produits de Santé des Armées, 45000 Orléans, France
| | - Jean-Rene Jourdain
- Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PRP-HOM, 92262 Fontenay-aux-Roses, France
| | - Maâmar Souidi
- Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PRP-HOM, SRBE, LRTOX, 92262 Fontenay-aux-Roses, France.
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Calil-Silveira J, Serrano-Nascimento C, Laconca RC, Schmiedecke L, Salgueiro RB, Kondo AK, Nunes MT. Underlying Mechanisms of Pituitary-Thyroid Axis Function Disruption by Chronic Iodine Excess in Rats. Thyroid 2016; 26:1488-1498. [PMID: 27461375 DOI: 10.1089/thy.2015.0338] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
BACKGROUND Iodine is essential for thyroid hormone synthesis and is an important regulator of thyroid function. Chronic iodine deficiency leads to hypothyroidism, but iodine excess also impairs thyroid function causing hyperthyroidism, hypothyroidism, and/or thyroiditis. This study aimed to investigate the underlying mechanisms by which exposure to chronic iodine excess impairs pituitary-thyroid axis function. METHODS Male Wistar rats were treated for two months with NaI (0.05% and 0.005%) or NaI+NaClO4 (0.05%) dissolved in drinking water. Hormone levels, gene expression, and thyroid morphology were analyzed later. RESULTS NaI-treated rats presented high levels of iodine in urine, increased serum thyrotropin levels, slightly decreased serum thyroxine/triiodothyronine levels, and a decreased expression of the sodium-iodide symporter, thyrotropin receptor, and thyroperoxidase mRNA and protein, suggesting a primary thyroid dysfunction. In contrast, thyroglobulin and pendrin mRNA and protein content were increased. Kidney and liver deiodinase type 1 mRNA expression was decreased in iodine-treated rats. Morphological studies showed larger thyroid follicles with higher amounts of colloid and increased amounts of connective tissue in the thyroid of iodine-treated animals. All these effects were prevented when perchlorate treatment was combined with iodine excess. CONCLUSIONS The present data reinforce and add novel findings about the disruption of thyroid gland function and the compensatory action of increased thyrotropin levels in iodine-exposed animals. Moreover, they draw attention to the fact that iodine intake should be carefully monitored, since both deficient and excessive ingestion of this trace element may induce pituitary-thyroid axis dysfunction.
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Affiliation(s)
- Jamile Calil-Silveira
- 1 Department of Physiology and Biophysics, Institute of Biomedical Sciences, University of São Paulo , São Paulo, Brazil
| | - Caroline Serrano-Nascimento
- 1 Department of Physiology and Biophysics, Institute of Biomedical Sciences, University of São Paulo , São Paulo, Brazil
| | - Raquel Cardoso Laconca
- 1 Department of Physiology and Biophysics, Institute of Biomedical Sciences, University of São Paulo , São Paulo, Brazil
| | - Letícia Schmiedecke
- 1 Department of Physiology and Biophysics, Institute of Biomedical Sciences, University of São Paulo , São Paulo, Brazil
| | - Rafael Barrera Salgueiro
- 1 Department of Physiology and Biophysics, Institute of Biomedical Sciences, University of São Paulo , São Paulo, Brazil
| | - Ayrton Kimidi Kondo
- 1 Department of Physiology and Biophysics, Institute of Biomedical Sciences, University of São Paulo , São Paulo, Brazil
| | - Maria Tereza Nunes
- 1 Department of Physiology and Biophysics, Institute of Biomedical Sciences, University of São Paulo , São Paulo, Brazil
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Chen XY, Lin CH, Yang LH, Li WG, Zhang JW, Zheng WW, Wang X, Qian J, Huang JL, Lei YX. The Effect on Sodium/Iodide Symporter and Pendrin in Thyroid Colloid Retention Developed by Excess Iodide Intake. Biol Trace Elem Res 2016; 172:193-200. [PMID: 26660892 DOI: 10.1007/s12011-015-0580-4] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/24/2015] [Accepted: 11/27/2015] [Indexed: 01/07/2023]
Abstract
It is well known that excess iodide can lead to thyroid colloid retention, a classic characteristic of iodide-induced goiter. However, the mechanism has not been fully unrevealed. Iodide plays an important role in thyroid function at multiple steps of thyroid colloid synthesis and transport among which sodium/iodide symporter (NIS) and pendrin are essential. In our study, we fed female BALB/c mice with different concentrations of high-iodine water including group A (control group, 0 μg/L), group B (1500 μg/L), group C (3000 μg/L), group D (6000 μg/L), and group E (12,000 μg/L). After 7 months of feeding, we found that excess iodide could lead to different degrees of thyroid colloid retention. Besides, NIS and pendrin expression were downregulated in the highest dose group. The thyroid iodide intake function detected by urine iodine assay and thyroidal (125)I experiments showed that the urine level of iodine increased, while the iodine intake rate decreased when the concentration of iodide used in feeding water increased (all p < 0.05 vs. control group). In addition, transmission electron microscopy (TEM) indicated a reduction in the number of intracellular mitochondria of thyroid cells. Based on these findings, we concluded that the occurrence of thyroid colloid retention exacerbated by excess iodide was associated with the suppression of NIS and pendrin expression, providing an additional insight of the potential mechanism of action of excess iodide on thyroid gland.
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Affiliation(s)
- Xiao-Yi Chen
- School of Public Health, Guangzhou Medical University, 195 Dongfengxi Road, Guangzhou, 510182, People's Republic of China
| | - Chu-Hui Lin
- School of Public Health, Guangzhou Medical University, 195 Dongfengxi Road, Guangzhou, 510182, People's Republic of China
| | - Li-Hua Yang
- School of Public Health, Guangzhou Medical University, 195 Dongfengxi Road, Guangzhou, 510182, People's Republic of China
| | - Wang-Gen Li
- Department of Endocrinology, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510260, People's Republic of China
| | - Jin-Wei Zhang
- School of Public Health, Guangzhou Medical University, 195 Dongfengxi Road, Guangzhou, 510182, People's Republic of China
| | - Wen-Wei Zheng
- School of Public Health, Guangzhou Medical University, 195 Dongfengxi Road, Guangzhou, 510182, People's Republic of China
| | - Xiang Wang
- School of Public Health, Guangzhou Medical University, 195 Dongfengxi Road, Guangzhou, 510182, People's Republic of China
| | - Jiang Qian
- School of Public Health, Guangzhou Medical University, 195 Dongfengxi Road, Guangzhou, 510182, People's Republic of China
| | - Jia-Luan Huang
- School of Public Health, Guangzhou Medical University, 195 Dongfengxi Road, Guangzhou, 510182, People's Republic of China
| | - Yi-Xiong Lei
- School of Public Health, Guangzhou Medical University, 195 Dongfengxi Road, Guangzhou, 510182, People's Republic of China.
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Panveloski-Costa AC, Silva Teixeira S, Ribeiro IMR, Serrano-Nascimento C, das Neves RX, Favaro RR, Seelaender M, Antunes VR, Nunes MT. Thyroid hormone reduces inflammatory cytokines improving glycaemia control in alloxan-induced diabetic wistar rats. Acta Physiol (Oxf) 2016; 217:130-40. [PMID: 26748816 DOI: 10.1111/apha.12647] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2015] [Revised: 11/09/2015] [Accepted: 12/28/2015] [Indexed: 12/13/2022]
Abstract
AIM This study aimed at evaluating whether thyroid hormone treatment could improve glycaemia and insulin response in alloxan-induced diabetic rats by altering cytokine expression in the skeletal muscle and epididymal white adipose tissue (eWAT) as well as altering inflammatory cell infiltration in eWAT. METHODS Diabetes mellitus (DM) was induced in male Wistar rats by alloxan injection, and a subset of the diabetic rats was treated with T3 (1.5 μg per 100 g body weight) for a 28-day period (DT3 ). Cytokines were measured in serum (MILIplex assay kit) as well as in soleus and EDL skeletal muscles and eWAT by Western blotting. Thyroid function was evaluated by morphological, molecular and biochemical parameters. Cardiac function was assessed by measuring heart rate, blood pressure, maximal rate of pressure development (dp/dtmax ) and decline (dp/dtmin ) as well as the contractility index (CI). Sixty rats were used in the study. RESULTS Diabetic rats exhibited decreased thyroid function and increased inflammatory cytokines in serum, soleus muscle and eWAT. T3 treatment decreased glycaemia and improved insulin sensitivity in diabetic animals. These alterations were accompanied by decreased TNF-alpha and IL-6 content in soleus muscle and eWAT, and inflammatory cell infiltration in eWAT. T3 treatment did not affect cardiac function of diabetic rats. CONCLUSIONS The present data provide evidence that T3 treatment reduces glycaemia and improves insulin sensitivity in diabetic rats, and that at least part of this effect could result from its negative modulation of inflammatory cytokine expression.
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Affiliation(s)
- A. C. Panveloski-Costa
- Department of Physiology and Biophysics; Institute of Biomedical Sciences; University of São Paulo; São Paulo Brazil
| | - S. Silva Teixeira
- Department of Physiology and Biophysics; Institute of Biomedical Sciences; University of São Paulo; São Paulo Brazil
| | - I. M. R. Ribeiro
- Department of Physiology and Biophysics; Institute of Biomedical Sciences; University of São Paulo; São Paulo Brazil
| | - C. Serrano-Nascimento
- Department of Physiology and Biophysics; Institute of Biomedical Sciences; University of São Paulo; São Paulo Brazil
| | - R. X. das Neves
- Department of Cell and Developmental Biology; Institute of Biomedical Sciences; University of São Paulo; São Paulo Brazil
| | - R. R. Favaro
- Department of Cell and Developmental Biology; Institute of Biomedical Sciences; University of São Paulo; São Paulo Brazil
| | - M. Seelaender
- Department of Cell and Developmental Biology; Institute of Biomedical Sciences; University of São Paulo; São Paulo Brazil
| | - V. R. Antunes
- Department of Physiology and Biophysics; Institute of Biomedical Sciences; University of São Paulo; São Paulo Brazil
| | - M. T. Nunes
- Department of Physiology and Biophysics; Institute of Biomedical Sciences; University of São Paulo; São Paulo Brazil
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Calil-Silveira J, Serrano-Nascimento C, Kopp PA, Nunes MT. Iodide excess regulates its own efflux: a possible involvement of pendrin. Am J Physiol Cell Physiol 2016; 310:C576-82. [PMID: 26791486 DOI: 10.1152/ajpcell.00210.2015] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2015] [Accepted: 01/13/2016] [Indexed: 02/08/2023]
Abstract
Adequate iodide supply and metabolism are essential for thyroid hormones synthesis. In thyrocytes, iodide uptake is mediated by the sodium-iodide symporter, but several proteins appear to be involved in iodide efflux. Previous studies demonstrated that pendrin is able to mediate apical efflux of iodide in thyrocytes. Acute iodide excess transiently impairs thyroid hormone synthesis, a phenomenon known as the Wolff-Chaikoff effect. Although the escape from this inhibitory effect is not completely understood, it has been related to the inhibition of sodium-iodide symporter-mediated iodide uptake. However, the effects of iodide excess on iodide efflux have not been characterized. Herein, we investigated the consequences of iodide excess on pendrin abundance, subcellular localization, and iodide efflux in rat thyroid PCCl3 cells. Our results indicate that iodide excess increases pendrin abundance and plasma membrane insertion after 24 h of treatment. Moreover, iodide excess increases pendrin half-life. Finally, iodide exposure also increases iodide efflux from PCCl3 cells. In conclusion, these data suggest that pendrin may have an important role in mediating iodide efflux in thyrocytes, especially under conditions of iodide excess.
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Affiliation(s)
- Jamile Calil-Silveira
- Department of Physiology and Biophysics, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil; and
| | - Caroline Serrano-Nascimento
- Department of Physiology and Biophysics, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil; and
| | - Peter Andreas Kopp
- Division of Endocrinology Metabolism and Molecular Medicine, Feinberg School of Medicine, Northwestern University, Chicago, Illinois
| | - Maria Tereza Nunes
- Department of Physiology and Biophysics, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil; and
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