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Activation of thyroid-stimulating hormone receptor (TSHR) fundamentally leads to hyperthyroidism. To elucidate TSHR signaling, we conducted transcriptome analyses for hyperthyroid mice that we generated by overexpressing TSH. TSH overexpression drastically changed their thyroid transcriptome. In particular, enrichment analyses identified the cell cycle, phosphatidylinositol 3-kinase/Akt pathway, and Ras-related protein 1 pathway as possibly associated with goiter development. Regarding hyperthyroidism, was exclusively upregulated with TSH overexpression among genes crucial to thyroid hormone secretion. To verify its significance, we overexpressed TSH in knockout mice. TSH overexpression caused hyperthyroidism in knockout mice, equivalent to that in control mice. Thus, we did not observe significant changes in known genes and pathways involved in thyroid hormone secretion with TSH overexpression. Our datasets might include candidate genes that have not yet been identified as regulators of thyroid function. Our transcriptome datasets regarding hyperthyroidism can contribute to future research on TSHR signaling.
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http://dx.doi.org/10.1016/j.isci.2024.111565 | DOI Listing |
Cells
May 2025
Departamento de Genética del Desarrollo y Fisiología Molecular, Instituto de Biotecnología, Universidad Nacional Autónoma de México (UNAM), Avenida Universidad 2001, Cuernavaca 62210, Mexico.
The amplitude of the phasic output of thyrotropin-releasing hormone (TRH) into the hypothalamus-pituitary portal capillaries is likely controlled by the TRH-degrading ectoenzyme (TRH-DE) expressed on the surface of median eminence (ME) β2-tanycytes. To extend this hypothesis, we performed experiments on adult rodents reared in standard conditions. TRH-DE was close to the putative sites of TRH release in the male rat external layer of the ME.
View Article and Find Full Text PDFNeuropathology
August 2025
Department of Endocrinology and Metabolism, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China.
This study described a case of plurihormonal tumor associated with papillary thyroid carcinoma (PTC) and summarized the treatment approaches for similar cases, while also exploring the underlying pathogenesis. The patient exhibited symptoms indicative of acromegaly, central hyperthyroidism, and hyperprolactinemia. A glucose loading test demonstrated persistently elevated growth hormone (GH) levels, while thyroid function tests revealed inappropriate thyroid stimulating hormone (TSH) secretion.
View Article and Find Full Text PDFLipids Health Dis
March 2025
Department of Geriatric Medicine, Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Jinan, Shandong, 250014, China.
Subclinical hypothyroidism (SCH) contributes to obesity, with the liver acting as a crucial metabolic regulator. Thyroid-stimulating hormone (TSH) affects systemic lipid balance, potentially linking SCH to obesity. While the direct impact of TSH on hepatic lipid metabolism has been extensively documented, its role in modulating lipid dynamics in peripheral organs through liver-mediated pathways remains insufficiently understood.
View Article and Find Full Text PDFEndocrinology
February 2025
Department of Chemistry, University of Nevada, Reno, NV 89557-0216, USA.
Graves hyperthyroidism (GH) is a condition in which autoantibodies chronically activate the thyrotropin (TSH) receptor (TSHR). TSHR is one of the few G protein-coupled receptors (GPCRs) predicted to have a signal peptide, making it a potential target for cyclotriazadisulfonamide (CADA) compounds. We sought to determine whether a small-molecule drug that selectively induces nascent protein degradation could decrease TSHR expression in vitro and in vivo at therapeutically relevant levels.
View Article and Find Full Text PDFJ Endocrinol Invest
June 2025
Department of Clinical Pharmacology, Xiangya Hospital, Central South University, Changsha, 410078, China.
Purpose: To detect the expression of miR-27a-5p in differentiated thyroid cancer (DTC) and to explore its correlation with SREBP1 expression, DTC malignant progression, and TSH suppression therapy.
Methods: The expression levels of SREBP1 and miR-27a-5p in DTC tissues (n = 75) were detected by qRT-PCR. The expression of miR-27a-5p and SREBP1 was statistically analyzed for correlation with patients' postoperative TSH inhibition therapy.