Endocrine Abstracts

The Na+/I- symporter (NIS) is a plasma membrane glycoprotein that mediates active I- transport in the thyroid follicular cells (the first step in thyroid hormone biosynthesis), and in other tissues, such as lactating mammary gland. NIS is the basis for the effective use of radioiodide in the diagnostic and treatment of thyroid cancer. NIS mutations hae been identified as causes of congenital iodide transport defect (ITD). We have isolated the cDNA that encodes NIS, generated h...

The Na+/I− symporter (NIS) is a key plasma membrane protein that mediates active I− uptake in the thyroid, lactating breast, and other tissues with an electrogenic stoichiometry of 2 Na+ per I−. In the thyroid, NIS-mediated I− uptake is the first step in the biosynthesis of the iodine-containing thyroid hormones, which are essential early in life for proper development of the central nerv...