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논문 기본 정보

자료유형
학술저널
저자정보
정선향 (연세의료원) 이슬기 (을지대학교) 김현지 (연세대학교의과대학) 이기쁨 (연세대학교의과대학) 박선미 (Yonsei University College of Medicine) 김인규 (Yonsei University College of Medicine) 이잔디 (연세대학교) 조영석 (연세대학교)
저널정보
대한갑상선학회 International Journal of Thyroidology International Journal of Thyroidology 제14권 제2호
발행연도
2021.11
수록면
152 - 169 (18page)
DOI
10.11106/ijt.2021.14.2.152

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Background and Objectives: Although thyroid hormones affect human cancer progression, the regulatorymechanism of thyroid hormone receptors in carcinogenesis has not been elucidated. This study aimed to evaluatethe expression pattern of the thyroid hormone receptor (TR) and its corepressors, and to investigate the clinicaland biological functions of TR. Materials and Methods: Transcriptomic and clinical data for thyroid cancer weredownloaded from The Cancer Genome Atlas. Paraffin-embedded tissue sections from patients who underwentthyroidectomy were used for immunohistochemistry. BCPAP cells were treated with T3 to investigate the thyroidhormone target genes. Thyroid hormone receptor alpha (THRA) and Thyroid hormone receptor beta (THRB) wereknocked down by transient siRNA transfection. Results: THRA and THRB expression was lower in thyroid cancertissues than in normal tissues. However, strong focal staining of TRβ was observed in the invasive front. HighTHRB expression was associated with high Silencing Mediator for Retinoid or Thyroid hormone receptor (SMRT)expression, older age, a high MACIS (distant Metastasis, patient Age, Completeness of resection, local Invasion,and tumor Size) score, more aggressive histological subtypes, more frequent extra-thyroidal extension, andadvanced TNM stage. THRB expression was positively correlated with Hypoxia Inducible Factor 1 Subunit Alpha(HIF1A), L1 Cell Adhesion Molecule (L1CAM), and Lysyl Oxidase (LOX) expression. Thyroid hormone-inducedHIF1A, L1CAM, and LOX upregulation was abolished by siTHRB but not siTHRA in BCPAP cells. High SMRT andhigh THRB groups (SMRT/THRB) presented more aggressive clinical features and showed an upregulation of HIF1A,L1CAM, and LOX, as well as of epithelial-mesenchymal transition (EMT)-related genes, causing changes in thetumor microenvironment. Conclusion: Cooperative subtype switching from NCOR1/THRA to SMRT/THRB was thusrelated to aggressive clinical and molecular features, possibly related to EMT and EMT-related tumor microenvironment.

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