Target intelligence / Profile preview

Human Sodium Iodide Symporter (NIS)

Target
NIS
Molecular classification
Transporter, Membrane protein, Glycoprotein
01

Overview

The human sodium iodide symporter (NIS) is a transmembrane glycoprotein responsible for the active transport of iodide into cells, primarily thyroid follicular cells. It plays a crucial role in thyroid hormone biosynthesis and is a key target for radioiodine-based diagnostics and therapeutics, particularly in thyroid cancer. NIS expression is also observed in other tissues, including salivary glands, gastric mucosa, mammary glands, and some tumors, offering potential diagnostic and therapeutic opportunities beyond thyroid diseases.

Other names
SLC5A5sodium/iodide cotransporterTDH1solute carrier family 5 member 5
02

Mechanism of action

Active transport of iodide ions into cells, driven by the sodium gradient, enabling radioiodine uptake for imaging and therapy. Competitively inhibited by anions such as perchlorate and thiocyanate.

03

Biological functions

Iodide transportThyroid hormone synthesisSodium-dependent transport
04

Disease associations

Congenital hypothyroidismThyroid cancerBreast cancer
05

Safety considerations

Off-target effects of radioiodine therapyDevelopment of radioiodine resistance in tumorsImmunogenicity of ectopic NIS expression
06

Interacting drugs

Radioiodine isotopes (^131I, ^123I)

1 more in the full profile.

07

Biomarkers

NIS expression levels in thyroid cancerNIS expression in breast cancer

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