Identification of novel sodium iodide symporter interactors which modulate iodide uptake

2017 ◽  
Author(s):  
Alice Fletcher ◽  
Vikki Poole ◽  
Bhavika Modasia ◽  
Waraporn Imruetaicharoenchoke ◽  
Rebecca Thompson ◽  
...  
Keyword(s):  
Sodium Iodide ◽  
Sodium Iodide Symporter ◽  
Iodide Uptake

Identification of novel sodium iodide symporter (NIS) interactors which modulate iodide uptake

2016 ◽  
Author(s):  
Alice Fletcher ◽  
Vikki Poole ◽  
Bhavika Modasia ◽  
Waraporn Imruetaicharoenchoke ◽  
Rebecca Thompson ◽  
...  
Keyword(s):  
Sodium Iodide ◽  
Sodium Iodide Symporter ◽  
Iodide Uptake

scholarly journals Rapid regulation of thyroid sodium–iodide symporter activity by thyrotrophin and iodine

2005 ◽  
Vol 184 (1) ◽  
pp. 69-76 ◽  
Author(s):  
Andrea C F Ferreira ◽  
Lívia P Lima ◽  
Renata L Araújo ◽  
Glaucia Müller ◽  
Renata P Rocha ◽  
...  
Keyword(s):  
Sodium Iodide ◽  
Iodine Content ◽  
Concomitant Administration ◽  
High Serum ◽  
Sodium Iodide Symporter ◽  
Physiological Control ◽  
Iodide Uptake ◽  
Thyroid Hormone Biosynthesis ◽  
Serum Tsh

Transport of iodide into thyrocytes, a fundamental step in thyroid hormone biosynthesis, depends on the presence of the sodium–iodide symporter (NIS). The importance of the NIS for diagnosis and treatment of diseases has raised several questions about its physiological control. The goal of this study was to evaluate the influence of thyroid iodine content on NIS regulation by thyrotrophin (TSH) in vivo. We showed that 15-min thyroid radioiodine uptake can be a reliable measurement of NIS activity in vivo. The effect of TSH on the NIS was evaluated in rats treated with 1-methyl-2-mercaptoimidazole (MMI; hypothyroid with high serum TSH concentrations) for 21 days, and after 1 (R1d), 2 (R2d), or 5 (R5d) days of withdrawal of MMI. NIS activity was significantly greater in both MMI and R1d rats. In R2d and R5d groups, thyroid iodide uptake returned to normal values, despite continuing high serum TSH, possibly as a result of the re-establishment of iodine organification after withdrawal of MMI. Excess iodine (0.05% NaI for 6 days) promoted a significant reduction in thyroid radioiodide uptake, an effect that was blocked by concomitant administration of MMI, confirming previous findings that iodine organification is essential for the iodide transport blockade seen during iodine overload. Therefore, our data show that modulation of the thyroid NIS by TSH depends primarily on thyroid iodine content and, further, that the regulation of NIS activity is rapid.

scholarly journals The Sodium-Iodide Symporter NIS and Pendrin in Iodide Homeostasis of the Thyroid

Endocrinology ◽  
2009 ◽  
Vol 150 (3) ◽  
pp. 1084-1090 ◽  
Author(s):  
Aigerim Bizhanova ◽  
Peter Kopp
Keyword(s):  
Autosomal Recessive ◽  
Sodium Iodide ◽  
Basolateral Membrane ◽  
Sensorineural Deafness ◽  
Sodium Iodide Symporter ◽  
Pendred Syndrome ◽  
Iodide Uptake ◽  
Anion Transporter ◽  
Thyroid Hormone Biosynthesis ◽  
Biallelic Mutations

Thyroid hormones are essential for normal development and metabolism. Thyroid hormone biosynthesis requires iodide uptake into the thyrocytes and efflux into the follicular lumen, where it is organified on selected tyrosyls of thyroglobulin. Uptake of iodide into the thyrocytes is mediated by an intrinsic membrane glycoprotein, the sodium-iodide symporter (NIS), which actively cotransports two sodium cations per each iodide anion. NIS-mediated transport of iodide is driven by the electrochemical sodium gradient generated by the Na+/K+-ATPase. NIS is expressed in the thyroid, the salivary glands, gastric mucosa, and the lactating mammary gland. TSH and iodide regulate iodide accumulation by modulating NIS activity via transcriptional and posttranscriptional mechanisms. Biallelic mutations in the NIS gene lead to a congenital iodide transport defect, an autosomal recessive condition characterized by hypothyroidism, goiter, low thyroid iodide uptake, and a low saliva/plasma iodide ratio. Pendrin is an anion transporter that is predominantly expressed in the inner ear, the thyroid, and the kidney. Biallelic mutations in the SLC26A4 gene lead to Pendred syndrome, an autosomal recessive disorder characterized by sensorineural deafness, goiter, and impaired iodide organification. In thyroid follicular cells, pendrin is expressed at the apical membrane. Functional in vitro data and the impaired iodide organification observed in patients with Pendred syndrome support a role of pendrin as an apical iodide transporter. This review shows how the sodium-iodide symporter mediates the active transport of iodide at the basolateral membrane of thyrocytes and discusses biallelic mutations in NIS and the effects of pendrin.

scholarly journals Effect of Iodide on Human Choriogonadotropin, Sodium-Iodide Symporter Expression, and Iodide Uptake in BeWo Choriocarcinoma Cells

2007 ◽  
Vol 92 (10) ◽  
pp. 4046-4051 ◽  
Author(s):  
Huika Li ◽  
Kerry Richard ◽  
Brett McKinnon ◽  
Robin H. Mortimer
Keyword(s):  
Gene Expression ◽  
Protein Expression ◽  
Mrna Expression ◽  
Sodium Iodide ◽  
Sodium Iodide Symporter ◽  
Iodide Uptake ◽  
Hormone Synthesis ◽  
Human Choriogonadotropin ◽  
Fetal Thyroid ◽  
Choriocarcinoma Cells

Abstract Context: Active placental transport of maternal iodide by the thyroidal sodium iodide symporter (NIS) provides an essential substrate for fetal thyroid hormone synthesis. NIS is expressed in trophoblast and is regulated by human choriogonadotropin (hCG). In thyroid, iodide down-regulates expression of several genes including NIS. Placentas of iodine-deficient rats demonstrate up-regulation of NIS mRNA, suggesting a role for iodide in regulating placental NIS. Objectives and Methods: The objectives were to examine effects of iodide on expression of NIS and hCG in BeWo choriocarcinoma cells. Gene expression was studied by quantitative real-time PCR. Effects on NIS protein expression were assessed by Western blotting. Functional activity of NIS was measured by 125I uptake. Expression of hCG protein was assessed by immunoassay of secreted hormone. Results: Iodide inhibited NIS mRNA and membrane protein expression as well as 125I uptake, which were paralleled by decreased βhCG mRNA expression and protein secretion. Iodide had no effects on pendrin expression. Addition of hCG increased NIS mRNA expression. This effect was partially inhibited by addition of iodide. The inhibitory effects of iodide on NIS mRNA expression were abolished by propylthiouracil and dithiothreitol. Conclusions: We conclude that expression of placental NIS is modulated by maternal iodide. This may occur through modulation of hCG effects on NIS and hCG gene expression.

A nonradioactive iodide uptake assay for sodium iodide symporter function

2010 ◽  
Vol 396 (1) ◽  
pp. 91-95 ◽  
Author(s):  
Fanny Waltz ◽  
Lucie Pillette ◽  
Yves Ambroise
Keyword(s):  
Sodium Iodide ◽  
Sodium Iodide Symporter ◽  
Iodide Uptake ◽  
Uptake Assay

Reestablishment of In Vitro and In Vivo Iodide Uptake by Transfection of the Human Sodium Iodide Symporter (hNIS) in a hNIS Defective Human Thyroid Carcinoma Cell Line

Thyroid ◽  
2000 ◽  
Vol 10 (11) ◽  
pp. 939-943 ◽  
Author(s):  
Jan W.A. Smit ◽  
Janny P. Schröder-van der Elst ◽  
Marcel Karperien ◽  
Ivo Que ◽  
Gabri van der Pluijm ◽  
...  
Keyword(s):  
Thyroid Carcinoma ◽  
Cell Line ◽  
Sodium Iodide ◽  
Carcinoma Cell ◽  
Human Thyroid ◽  
Sodium Iodide Symporter ◽  
Iodide Uptake ◽  
Thyroid Carcinoma Cell

scholarly journals Retinol has specific effects on binding of thyrotrophin to cultured porcine thyrocytes

2004 ◽  
Vol 183 (3) ◽  
pp. 617-626 ◽  
Author(s):  
Eleonore Fröhlich ◽  
Anja Witke ◽  
Barbara Czarnocka ◽  
Richard Wahl
Keyword(s):  
Thyroid Cancer ◽  
Incubation Time ◽  
Time Course ◽  
Sodium Iodide ◽  
Sodium Iodide Symporter ◽  
Iodide Uptake ◽  
Specific Effects ◽  
Low Concentrations ◽  
Apoptotic Effect ◽  
Iodine 125

Retinoids are potential candidates for the treatment of thyroid cancer. However, one of the disadvantages of these substances is their dedifferentiating effect on normal non-transformed thyrocytes. To identify conditions under which no dedifferentiating effect of retinol on normal thyrocytes can be observed, we determined iodide uptake, protein iodination, expression of sodium–iodide symporter (NIS) mRNA and protein, and the binding of iodine-125-labelled bTSH in cultured porcine thyrocytes. Combination of TSH and ≤6.5 μM retinol increased iodide uptake and protein iodination compared with TSH alone over the entire incubation time, whereas TSH plus ≥13 μM retinol increased the uptake of iodine-125 only during the first 12 h but decreased it after 30 h and longer. After ≥30 h incubation times with ≥13 μM retinol, the fraction of apoptotic cells was enhanced and proliferation decreased. The incubation with retinol enhanced the binding of [125I]bTSH to thyrocytes, but did not influence expression of the NIS. With low retinol concentrations, the effect on the binding of TSH apparently predominated and retinol increased thyroid function; with higher concentrations the pro-apoptotic effect of retinol overlapped and a two-phased time course resulted. It can be concluded that low concentrations of retinol also exert differentiating effects in normal thyrocytes.

Study of potential inhibitors of thyroid iodide uptake by using CHO cells stably expressing the human sodium/iodide symporter (hNIS) protein

2010 ◽  
Vol 34 (3) ◽  
pp. 170-174 ◽  
Author(s):  
P. Agretti ◽  
A. Dimida ◽  
G. De Marco ◽  
E. Ferrarini ◽  
J. C. Rodrìguez González ◽  
...  
Keyword(s):  
Cho Cells ◽  
Sodium Iodide ◽  
Sodium Iodide Symporter ◽  
Iodide Uptake ◽  
Potential Inhibitors

scholarly journals Telomerase-Driven Expression of the Sodium Iodide Symporter (NIS) for in Vivo Radioiodide Treatment of Cancer: A New Broad-Spectrum NIS-Mediated Antitumor Approach

2011 ◽  
Vol 96 (9) ◽  
pp. E1435-E1443 ◽  
Author(s):  
Garcilaso Riesco-Eizaguirre ◽  
Antonio De la Vieja ◽  
Irene Rodríguez ◽  
Soledad Miranda ◽  
Pilar Martín-Duque ◽  
...  
Keyword(s):  
Therapeutic Effect ◽  
Cell Lines ◽  
Sodium Iodide ◽  
Human Cancer ◽  
131I Therapy ◽  
Sodium Iodide Symporter ◽  
Iodide Uptake ◽  
Tumor Xenografts ◽  
Human Cancer Cell Lines

Abstract Context: Telomerase promoters (hTERT and hTR) are useful for transcriptional targeting in gene therapy models of cancer. Telomerase-driven expression of the sodium iodide symporter (NIS) in tumor cells has been successfully used as a reporter gene in vivo using positron emission tomography (PET) imaging. Objective: The aim of this study was to investigate the NIS-mediated therapeutic effect of telomerase promoters in a wide variety of human cancer cell lines. Design and Methods: Promoter fragments from either hTERT or hTR were used to drive the expression of NIS in cell lines derived from melanoma (M14), breast (MDA-MB-231), colon (HT-29), lung (H460), ovarian (OVCAR-3), and thyroid (TPC-1) carcinomas. Iodide uptake assays, protein immunodetection, and clonigenic assays were used to confirm NIS functional expression and the 131I-mediated cytopathic effect. Tumor xenografts in mice were infected with hTERT and hTR and then treated using radioiodide. Results: Both promoters were selectively active in cancer cells that were effectively killed by exposure to 131I. One single dose of 1 mCi 131I markedly suppressed tumor growth of melanoma-derived tumor xenografts compared with controls. This effect was more modest in colon cancer-derived xenografts in part due to the reduced infectivity and the tumor cystic nature. The therapeutic effect of hTR promoter was found to be stronger than that of hTERT promoter. Conclusions: These results demonstrate that telomerase-driven expression of NIS could potentially have applications for 131I therapy of a wide variety of cancers. Additionally, this is the first study to report NIS-mediated 131I therapy of melanoma tumors in vivo.

scholarly journals Propylthiouracil increases sodium/iodide symporter gene expression and iodide uptake in rat thyroid cells in the absence of TSH

Thyroid ◽  
2012 ◽  
pp. 120521124804007
Author(s):  
Sue Mariko ◽  
Takeshi Akama ◽  
Akira Kawashima ◽  
Hannah Nakamura ◽  
Takeshi Hara ◽  
...  
Keyword(s):  
Gene Expression ◽  
Sodium Iodide ◽  
Sodium Iodide Symporter ◽  
Iodide Uptake ◽  
Thyroid Cells ◽  
Rat Thyroid
Sign in / Sign up

Export Citation Format

Share Document