Thyroid hormone receptors

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Báo cáo khoa học: Characterization and functional expression of cDNAs encoding thyrotropin-releasing hormone receptor from Xenopus laevis Identiﬁcation of a novel subtype of thyrotropin-releasing hormone receptor

Thyrotropin-releasing hormone receptor (TRHR) has already been cloned in mammals where thyrotropin-releas-inghormone (TRH) isknowntoactasapowerful stimulator of thyroid-stimulating hormone (TSH) secretion. The TRH receptor of amphibians has not yet been characterized, although TRH is specifically important in the adaptation of skin color to environmental changes via the secretion of a-melanocyte-stimulating hormone (a-MSH).

11p research12 23-04-2013 32 4 Download

Báo cáo khoa học: Proper targeting and activity of a nonfunctioning thyroid-stimulating hormone receptor (TSHr) combining an inactivating and activating TSHr mutation in one receptor

Activating mutations of the thyroid-stimulating hormone receptor (TSHr) have been identified as a cause of toxic adenomas. Germline-inactivating TSHr mutations have beendescribedas a cause of congenital hypothyroidism. The effects of combining activating and inactivating mutations within a single receptor was studied. The double mutant T477I/P639S contained an activating TSHr mutation (P639S) togetherwithan inactivatingone (T477I). Theother one (I486M/P639S) contained two activating mutations.

9p tumor12 20-04-2013 37 3 Download

Báo cáo khoa học: Role of cleavage and shedding in human thyrotropin receptor function and trafﬁcking

The thyrotropin receptor (TSHR) undergoes a cleavage at the cell membrane, leading to a heterodimer, comprising an aextracellular and a b-transmembrane and intracellular subunits, held togetherbydisulfidebonds.Moreover, part of the a-subunit of the receptor is shed from thyroid and transfected L cells.To understand the role of cleavage and shedding, we constructed deletion mutants starting, respectively, at the most N-terminal (S314), and C-terminal (L378) cleavage sites previously mapped, corresponding to free b1orb2-subunits without further modification of receptor structure....

12p tumor12 20-04-2013 37 2 Download
Báo cáo khoa học: Thyroid hormone induces the expression of 4-1BB and activation of caspases in a thyroid hormone receptor-dependent manner

Thyroid hormone has various effects on cell proliferation, growth and apoptosis. To gain more insight into the molecular dynamics caused by thyroid hormone, gene expression in HeLaTRcells that constitutively over-expressed the thyroid hormone receptor (TR) was analyzed. Gene expression profiling of the HeLaTRcells with an oligonucleotide microarray yielded 229 genes whose expression was significantly altered by T3.

10p fptmusic 16-04-2013 36 4 Download