PMID- 15186611 OWN - NLM STAT- MEDLINE DCOM- 20050111 LR - 20131121 IS - 1050-7256 (Print) IS - 1050-7256 (Linking) VI - 14 IP - 5 DP - 2004 May TI - Search for genetic variants in the retinoid X receptor-gamma-gene by polymerase chain reaction-single-strand conformation polymorphism in patients with resistance to thyroid hormone without mutations in thyroid hormone receptor beta gene. PG - 355-8 AB - Resistance to thyroid hormone (RTH) is an inherited disease characterized by reduced tissue sensitivity to thyroid hormone. Approximately 90% of subjects with RTH have mutation in the thyroid hormone receptor beta (TRbeta) gene. Approximately 10% of subjects diagnosed as having RTH do not carry mutation in the TRbeta gene. A possible linkage was reported with the retinoid X receptor-gamma (RXR-gamma) gene in two families. The aim of this study is to search for mutation within the RXR-gamma gene in unrelated subjects with diagnosed RTH without mutations in the TRbeta gene. Four subjects with RTH were studied, and sequence variants in the RXR-gamma gene were searched by polymerase chain reaction-single-strand conformation polymorphism (PCR-SSCP). Analysis of all the 10 exons of the RXR-gamma gene, including intron-exon boundaries, promoter region and 3' untranslated region (UTR) reveled two variant bands in subjects II and III. Sequencing of these variants showed two single nucleotide polymorphisms (SNPs): 447C > T in exon 3 for patients II and IVS9 + 6A > G for patient III. Both SNPs were also present at high frequency in a group of normal subjects and in nonaffected relatives of subject III. In conclusion, in patients with RTH we have found two SNPs in the RXR-gamma gene; these SNPS are common in the general population, thus excluding a role for the RXR-gamma gene in these patients. FAU - Romeo, Stefano AU - Romeo S AD - Department of Clinical Sciences, Division of Endocrinology, University of Rome La Sapienza, Rome, Italy. FAU - Menzaghi, Claudia AU - Menzaghi C FAU - Bruno, Rocco AU - Bruno R FAU - Sentinelli, Federica AU - Sentinelli F FAU - Fallarino, Mara AU - Fallarino M FAU - Fioretti, Francesca AU - Fioretti F FAU - Filetti, Sebastiano AU - Filetti S FAU - Balsamo, Armando AU - Balsamo A FAU - Di Mario, Umberto AU - Di Mario U FAU - Baroni, Marco G AU - Baroni MG LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - Thyroid JT - Thyroid : official journal of the American Thyroid Association JID - 9104317 RN - 0 (DNA Primers) RN - 0 (Receptors, Thyroid Hormone) RN - 0 (Retinoid X Receptor gamma) RN - 0 (Thyroid Hormone Receptors beta) RN - 0 (Thyroid Hormones) RN - 06LU7C9H1V (Triiodothyronine) RN - 9002-71-5 (Thyrotropin) SB - IM MH - Adult MH - DNA Primers MH - Exons/genetics MH - Female MH - *Genetic Variation MH - Goiter/genetics MH - Humans MH - Introns/genetics MH - Male MH - Middle Aged MH - Mutation MH - Polymerase Chain Reaction/methods MH - *Polymorphism, Single Nucleotide MH - Receptors, Thyroid Hormone/*genetics MH - Retinoid X Receptor gamma/*genetics MH - Thyroid Hormone Receptors beta MH - Thyroid Hormone Resistance Syndrome/*genetics MH - Thyroid Hormones/*pharmacology MH - Thyrotropin/blood MH - Triiodothyronine/blood EDAT- 2004/06/10 05:00 MHDA- 2005/01/12 09:00 CRDT- 2004/06/10 05:00 PHST- 2004/06/10 05:00 [pubmed] PHST- 2005/01/12 09:00 [medline] PHST- 2004/06/10 05:00 [entrez] AID - 10.1089/105072504774193177 [doi] PST - ppublish SO - Thyroid. 2004 May;14(5):355-8. doi: 10.1089/105072504774193177.