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Riesco-Eizaguirre
A perspective view of sodium iodide symporter research and its clinical implications.Riesco-Eizaguirre G, Santisteban P. Eur J Endocrinol. 2006 Oct;155(4):495-512. Review.
"The sodium iodide
symporter (NIS) is an intrinsic plasma membrane protein that
mediates active iodide transport into the thyroid gland and into
several extrathyroidal tissues, in particular the lactating
mammary gland. Cloning and molecular characterization of the NIS
have allowed the investigation of its key role in thyroid
physiology as well as its potential pathophysiological and
therapeutic implications in benign and malignant thyroid
diseases. Similarly, elucidating the mechanisms underlying the
regulation of NIS in lactating mammary gland and breast cancer,
in which more than 80% of cases express endogenous NIS, may lead
to findings that have novel implications for pathophysiology and
therapy. Two approaches may, in the future, pave the way to
extend the use of radioiodide treatment to nonthyroidal cancer.
One is based on the reinduction of endogenous NIS expression in
thyroid and breast cancer by targeting the main mechanisms
involving tumoral transformation and dedifferentiation. The other
is based on the application of NIS as a novel cytoreductive gene
therapy strategy. NIS offers the unique advantage that it can be
used both as a reporter and as a therapeutic gene, so that it is
possible to image, monitor, and treat the tumor with radioiodide,
just as in differentiated thyroid cancer. This review summarizes
the main recent findings in NIS research that have a direct
impact on diagnosis and therapeutic management." |
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