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Thyroid hyperfunctioning adenomas with and without Gsp/TSH receptor mutations show similar clinical features
F Arturi1, C Capula, E Chiefari
1Cattedra di Endocrinologia, Dipartimento di Medicina Sperimentale e Clinica, Università di Reggio Calabria, Catanzaro, Italy.
Abstract:
Activating mutations of Gs alpha protein (gsp) and TSH receptor (TSH-R) identified in autonomously hyperfunctioning thyroid adenomas have been proposed as the primary event responsible for this disease. Since mutations have not been detected in 100% (ranging from less than 10% to 90%) of the patients, we evaluated whether the presence of gsp and TSH-R mutations cause differences in the clinical and biochemical parameters of the affected patients. Fifteen consecutive patients (11 women and 4 men) with autonomously hyperfunctioning thyroid adenomas who underwent thyroidectomy, previously examined for the presence of gsp or TSH-R mutations, were investigated. In all of the patients we examined plasma free T3, free T4, TSH levels and ultrasound volume of the nodules. The patients with mutations in gsp or TSH-R were similar to the patients without mutations for clinical presentation, sex distribution and mean age. Furthermore, basal serum FT3, TSH and tumor volume in the patients with mutations were not significantly different from the group without mutations. Our preliminary data demonstrate that no significant differences are present in the two groups of patients examined, suggesting that factors other than gsp or TSH-R mutations play a role in the clinical presentation of the disease.
Insights
Activating mutations in Gs alpha protein (gsp) and TSH receptor (TSH-R) were investigated in thyroid adenomas. Preliminary data show no significant clinical or biochemical differences between patients with or without these mutations.
Area of Science:
- Endocrinology
- Molecular Biology
- Oncology
Background:
- Activating mutations in Gs alpha protein (gsp) and TSH receptor (TSH-R) are implicated in autonomously hyperfunctioning thyroid adenomas.
- However, these mutations are not detected in all patients, suggesting other factors may be involved.
Purpose of the Study:
- To evaluate if the presence of gsp or TSH-R mutations influences clinical and biochemical parameters in patients with autonomously hyperfunctioning thyroid adenomas.
- To investigate potential differences in disease presentation based on mutation status.
Main Methods:
- Fifteen patients with autonomously hyperfunctioning thyroid adenomas were analyzed.
- Plasma levels of free T3, free T4, and TSH, along with nodule ultrasound volume, were measured.
- Patients were categorized based on the presence or absence of gsp or TSH-R mutations.
Main Results:
- No significant differences were observed in clinical presentation, sex distribution, or mean age between patients with and without gsp/TSH-R mutations.
- Basal serum FT3, TSH levels, and tumor volume did not significantly differ between the two groups.
- Preliminary data indicate no correlation between mutation status and examined clinical/biochemical parameters.
Conclusions:
- The presence of gsp or TSH-R mutations does not appear to significantly alter the clinical or biochemical presentation of autonomously hyperfunctioning thyroid adenomas.
- Factors beyond gsp and TSH-R mutations likely contribute to the disease's clinical manifestation.
- Further research is needed to identify other contributing factors.