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- W4230604827 abstract "The receptor of parathyroid hormone and parathyroid hormone-related-protein (PTH/PTHrp) is located in the cell membrane of target tissues – kidney and osteoblasts. It is a G protein-coupled-receptor whose Gsα subunit is encoded by the GNAS gene. Our aim was to study whether the single nucleotide polymorphism (SNP) T393C of the GNAS gene is associated with renal stones, bone mineral density (BMD), or bone remodelling markers in primary hyperparathyroidism (PHPT). An analysis was made of clinical and biochemical parameters and densitometric values in three areas and their relationship with the T393C SNP of the GNAS gene in 261 patients with primary hyperparathyroidism and in 328 healthy controls. Genotyping was performed using the Custom Taqman® SNP Genotyping assay. The genotype frequencies of GNAS T/C 393 were similar in the control and PHPT groups. No association was found between genotypes and clinical expression of PHPT (renal stones and bone fractures). A nonstatistically significant trend was seen to lower BMD in the lumbar spine, femoral neck, and total hip in both PHPT and control C homozygote subjects. Genetic susceptibility to PHPT related to the GNAS T393C polymorphism or a major influence in its development and clinical expression were found. A C allele-related susceptibility to lower BMD in trabecular bone in both PHPT and control subjects is not sufficient to suggest a more severe clinical expression of PHPT. This trend may be considered as a basis for further studies with larger sample sizes and complementary functional evaluation. El receptor de la hormona paratiroidea y de la proteína relacionada con la hormona paratiroidea (PTH/PTHrp) está situado en la membrana celular de sus tejidos diana: riñón y osteoblastos. Se trata de un receptor unido a proteina G cuya subunidad Gsα está codificada por el gen GNAS. Nuestro objetivo fue estudiar si el polimorfismo de un sólo nucleótido (SNP) T393C del gen GNAS se asociaba con litiasis renal, densidad mineral ósea (DMO) o marcadores de remodelado óseo en el hiperparatiroidismo primario (HPTP). Analizamos parámetros clínicos, bioquímicos y densitométricos en 3 zonas y su relación con el SNP T393C del gen GNAS en 261 pacientes con HPTP y en 328 controles sanos. El genotipado se realizó utilizando el ensayo Custom Taqman®. Las frecuencias genotípicas del SNP T/C 393 del GNAS fueron similares en ambos grupos control y HPTP. No encontramos ninguna asociación entre los genotipos y la expresión clínica del HPTP (litiasis renal y fracturas óseas). Encontramos una tendencia no estadísticamente significativa hacia una menor DMO en columna lumbar, cuello femoral y cadera en los sujetos control y HPTP portadores del alelo C. No encontramos susceptibilidad genética para el desarrollo de PHPT relacionada con el polimorfismo T393C del gen GNAS ni influencia en su expression clínica. Sí hallamos una tendencia hacia niveles menores de DMO en el hueso trabecular relacionada con el alelo C en pacientes con PHPT y en sujetos control sin ser suficiente para sugerir una expresión clínica más grave. Estos resultados pueden ser considerados como un punto de partida para futuros estudios con mayor tamaño muestral y con evaluación funcional complementaria." @default.
- W4230604827 created "2022-05-11" @default.
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- W4230604827 date "2017-12-01" @default.
- W4230604827 modified "2023-10-18" @default.
- W4230604827 title "Analysis of the influence of the T393C polymorphism of the GNAS gene on the clinical expression of primary hyperparathyroidism" @default.
- W4230604827 doi "https://doi.org/10.1016/j.endien.2017.11.012" @default.
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