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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Iodide excess regulates its own efflux: a possible involvement of pendrin

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Author(s):
Calil-Silveira, Jamile [1] ; Serrano-Nascimento, Caroline [1] ; Kopp, Peter Andreas [2] ; Nunes, Maria Tereza [1]
Total Authors: 4
Affiliation:
[1] Univ Sao Paulo, Inst Biomed Sci, Dept Physiol & Biophys, BR-05508000 Sao Paulo, SP - Brazil
[2] Northeastern Univ, Feinberg Sch Med, Div Endocrinol Metab & Mol Med, Chicago, IL - USA
Total Affiliations: 2
Document type: Journal article
Source: AMERICAN JOURNAL OF PHYSIOLOGY-CELL PHYSIOLOGY; v. 310, n. 7, p. C576-C582, APR 1 2016.
Web of Science Citations: 5
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 PCC13 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 PCC13 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. (AU)

FAPESP's process: 10/05503-2 - EFFECT OF ACUTE ADMINISTRATION OF IODINE IN THE PENDRIN GENE EXPRESSION AND PROMOTER ACTIVITY: STUDY IN VIVO AND IN VITRO
Grantee:Jamile Calil Silveira
Support type: Scholarships in Brazil - Doctorate
FAPESP's process: 09/17834-6 - Study of the molecular basis of the short-term regulation of the Na+/I- symporter (NIS) and pendrin gene expression in rats thyroid and PCCl3 cells: possible contribution to the comprehension of the Wolff-Chaikoff effect and the escape phenomenon
Grantee:Maria Tereza Nunes
Support type: Regular Research Grants
FAPESP's process: 12/13011-8 - Does iodide regulate the expression and activity of its apical transporter, pendrin? study in PCCl3 and TSA-201 cells
Grantee:Jamile Calil Silveira
Support type: Scholarships abroad - Research Internship - Doctorate
FAPESP's process: 12/24391-6 - Impact of iodine excess exposure during pregnancy and/or lactation on the hypothalamus-pituitary-thyroid axis activity in rat dams and their offspring
Grantee:Caroline Serrano Do Nascimento
Support type: Scholarships in Brazil - Post-Doctorate