Endocrinology and Metabolism

Original Articles

Thyroid
BRAF^V600E Mutation Enhances Estrogen-Induced Metastatic Potential of Thyroid Cancer by Regulating the Expression of Estrogen Receptors: Minjun Kim, Su-jin Kim, Seong Yun Ha, Zhen Xu, Youngjin Han, Hyeon-Gun Jee, Sun Wook Cho, Young Joo Park, Kyu Eun Lee; Endocrinol Metab. 2022;37(6):879-890. Published online December 26, 2022; DOI: https://doi.org/10.3803/EnM.2022.1563

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Background
Cross-talk between mitogen-activated protein kinase and estrogen has been reported; however, the role of BRAF^V600E in the estrogen responsiveness of thyroid cancer is unknown. We elucidated the effect of BRAF^V600E on the estrogen-induced increase in metastatic potential in thyroid cancer.
Methods
Using a pair of cell lines, human thyroid cell lines which harbor wild type BRAF gene (Nthy/WT) and Nthy/BRAF^V600E (Nthy/V600E), the expression of estrogen receptors (ERs) and estrogen-induced metastatic phenotypes were evaluated. Susceptibility to ERα- and ERβ-selective agents was evaluated to confirm differential ER expression. ESR expression was analyzed according to BRAF^V600E status and age (≤50 years vs. >50 years) using The Cancer Genome Atlas (TCGA) data.
Results
Estradiol increased the ERα/ERβ expression ratio in Nthy/V600E, whereas the decreased ERα/ERβ expression ratio was found in Nthy/WT. BRAF^V600E-mutated cell lines showed a higher E2-induced increase in metastatic potential, including migration, invasion, and anchorage-independent growth compared with Nthy/WT. An ERα antagonist significantly inhibited migration in Nthy/V600E cells, whereas an ERβ agonist was more effective in Nthy/WT. In the BRAF^V600E group, ESR1/ESR2 ratio was significantly higher in younger age group (≤50 years) compared with older age group (>50 years) by TCGA data analysis.
Conclusion
Our data show that BRAF^V600E mutation plays a crucial role in the estrogen responsiveness of thyroid cancer by regulating ER expression. Therefore, BRAF^V600E might be used as a biomarker when deciding future hormone therapies based on estrogen signaling in thyroid cancer patients.

Citations

Citations to this article as recorded by

The importance of protein domain mutations in cancer therapy
Kiran Kumar Chitluri, Isaac Arnold Emerson
Heliyon.2024; 10(6): e27655. CrossRef
Three cases of thyroid cancer in transgender female veterans receiving gender-affirming estrogen treatment
John D. Christensen, Hiba T. Basheer
Endocrine and Metabolic Science.2024; 15: 100177. CrossRef
Thyroid Cancer Prevalence, Risk Exposure, and Clinical Features Among Transgender Female Veterans
John David Christensen, Hiba T Basheer, Jose Joaquin Lado Abeal
Journal of the Endocrine Society.2024;[Epub] CrossRef
Association of DNA Promoter Methylation and BRAF Mutation in Thyroid Cancer
Farzana Jasmine, Briseis Aschebrook-Kilfoy, Mohammad M. Rahman, Garrett Zaagman, Raymon H. Grogan, Mohammed Kamal, Habibul Ahsan, Muhammad G. Kibriya
Current Oncology.2023; 30(3): 2978. CrossRef
Editorial: Recent advances in papillary thyroid carcinoma: Progression, treatment and survival predictors
Erivelto Martinho Volpi, Margarita Carmen Ramirez-Ortega, Jose Federico Carrillo
Frontiers in Endocrinology.2023;[Epub] CrossRef

Clinical Study
Efficacy of Intraoperative Neuromonitoring in Reoperation for Recurrent Thyroid Cancer Patients: Jang-il Kim, Su-jin Kim, Zhen Xu, JungHak Kwak, Jong-hyuk Ahn, Hyeong Won Yu, Young Jun Chai, June Young Choi, Kyu Eun Lee; Endocrinol Metab. 2020;35(4):918-924. Published online December 23, 2020; DOI: https://doi.org/10.3803/EnM.2020.778

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102 Download
5 Web of Science
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Background
The use of intraoperative neuromonitoring (IONM) in thyroid surgery to preserve recurrent laryngeal nerve (RLN) function has been widely accepted. We aimed to evaluate the usefulness of IONM in reoperation for recurrent thyroid cancer patients to help identify the RLN and prevent vocal cord palsy (VCP).
Methods
We analyzed 121 consecutive patients (with IONM group, 48 patients; without IONM group, 73 patients) who underwent reoperation for recurrent thyroid cancer after total thyroidectomy from January 2009 to March 2019 in our institution without VCP due to previous operations. Data including age, sex, number of previous operations, histologic subtype of the malignancy at the initial operation, operation time, RLNs at risk, difficulty of RLN identification, surgical procedure, VCP, and other postoperative complications were reviewed. Vocal cord movement evaluations were performed preoperatively and at 2 weeks postoperatively to evaluate RLN function. In patients with VCP, additional evaluations were performed. VCP exceeding 12 months after surgery was considered permanent VCP.
Results
VCP was observed in six (12.5%) and 16 (21.9%) patients with and without IONM (P=0.189). Transient and permanent VCP were found in three (6.3%) and three (6.3%) patients with IONM (P=0.098 and P=0.982, respectively) versus in 12 (16.4%) and four (5.5%) patients without IONM.
Conclusion
The incidence of transient VCP seems to be lower in reoperations with IONM; however, there was no statistical significances. Further study will be needed to ascertain the efficacy of IONM in reoperation for recurrent thyroid cancer patients.

Citations

Citations to this article as recorded by

The learning curve for gasless transaxillary posterior endoscopic thyroidectomy for thyroid cancer: a cumulative sum analysis
Weisheng Chen, Shitong Yu, Baihui Sun, Cangui Wu, Tingting Li, Shumin Dong, Junna Ge, Shangtong Lei
Updates in Surgery.2023; 75(4): 987. CrossRef
Intraoperative neuromonitoring of the recurrent laryngeal nerve is indispensable during complete endoscopic radical resection of thyroid cancer: A retrospective study
Yang Fei, Yang Li, Feng Chen, Wen Tian
Laryngoscope Investigative Otolaryngology.2022; 7(4): 1217. CrossRef
The value of intraoperative nerve monitoring against recurrent laryngeal nerve injury in thyroid reoperations
Maowei Pei, Siqi Zhu, Chunjie Zhang, Guoliang Wang, Mingrong Hu
Medicine.2021; 100(51): e28233. CrossRef

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