ArticleDoklady. Biochemistry and biophysics2025
Low-molecular-weight Ligand of the Thyroid-stimulating Hormone Receptor with the Activity of a Partial Agonist and a Negative Allosteric Modulator.
Article in Doklady. Biochemistry and biophysics, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Graves' disease is caused by overactivation of the thyroid-stimulating hormone receptor (TSHR). One approach for its treatment may be the use of negative allosteric modulators (NAM) of TSHR, which normalize TSHR activity and do not cause thyroid hormone (TH) deficiency. The aim of the work was to study the effect of a new compound 5-amino-4-(4-bromophenyl)-2-(methylthio)thieno[2,3-d]pyrimidine-6-carboxylic acid N-tert-butylamide (TPY4) on the basal and TSH-stimulated TH production in cultured FRTL-5 thyrocytes and on basal and thyrotropin-releasing hormone (TRH)-stimulated TH levels in the blood of rats. TPY4 stimulated TH production by thyrocytes and increased TH levels when administered intraperitoneally and orally in rats. It also decreased the TSH-stimulated TH production in thyrocytes and the TRH-stimulated TH levels in rats. Thus, TPY4 is the first known allosteric regulator of TSHR, combining the properties of NAM and a partial agonist, and can be considered as a prototype of drugs for the treatment of Graves' disease.
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