Objective: The American Thyroid Association (ATA) proposed a new risk classification for hereditary medullary thyroid carcinoma (MTC) in 2015. This study aimed to assess whether the new guidelines are suitable for the...Objective: The American Thyroid Association (ATA) proposed a new risk classification for hereditary medullary thyroid carcinoma (MTC) in 2015. This study aimed to assess whether the new guidelines are suitable for the Chinese population, and reported our experience on prophylactic thyroidectomy. Methods: A total of 73 patients from 22 families were screened as rearranged during transfection (RET) mutation carriers from 2010 to 2016 in Cancer Hospital, Chinese Academy of Medical Science; the medical history for each patient was collected. Based on the initial treatment, we identified the risk factors for poor prognosis by univariate and multivariate logistic regression. Then, 4 RET mutation carriers were enrolled for prophylactic thyroidectomy, and their pathological data and follow-up outcomes were recorded. Results: In univariate and multivariate logistic regression analyses, age at initial surgery and risk classification were significant risk factors for stage III/IV hereditary MTC at initial diagnosis. The likelihood was increased by 11.6% per year of age at initial surgery [95% confidence interval (95% CI), 1.040-1.198; P=0.002). It was 7.888 times more likely to have III/IV stage disease for ATA highest risk patients, compared to ATA moderate risk individuals (95% CI, 1.607-38.717; P=0.003). Postoperative pathological results showed all 4 multiple endocrine neoplasia type 2A (MEN2A) patients had C-cell hyperplasia (CCH); multifocal malignancies were detected in 3 of them. All 4 patients were cured biochemically, and none developed permanent hypoparathyroidism. Conclusions: In Chinese individuals, hereditary MTC aggressiveness is in line with the new ATA risk classification. Germline RET gene mutation carriers should undergo prophylactic thyroidectomy according to basal serum calcitonin levels.展开更多
文摘目的探讨生物钟基因CLOCK、BMAL1与多发性内分泌腺瘤病2型(multiple endocrine neoplasia 2,MEN2型)甲状腺髓样癌(medullary thyroid carcinoma,MTC)的相关性。方法回顾性分析2013年1月至2021年9月在青岛大学附属烟台毓璜顶医院病理确诊为MEN2型MTC的病例13例(男性8例,女性5例,年龄15~69岁)及同期随机选取的非MEN2型MTC病例13例(男性7例,女性6例,年龄33~74岁)。分析比较2组患者的临床指标,并利用免疫组织化学、实时荧光定量PCR(quantitative real time PCR,qPCR)等技术检测CLOCK、BMAL1在MEN2型MTC组织与癌旁组织、非MEN2型MTC组织间的表达差异;分析淋巴结转移数量与CLOCK、BMAL1表达相关性;蛋白互作(protein-protein interaction,PPI)网络分析结合qPCR和相关性分析挖掘MEN2常见突变基因RET表达与生物钟基因间的表达调控关系;利用地塞米松节律同步化后脂多糖细胞刺激试验验证MEN2细胞节律紊乱特点。采用独立样本t检验对数据进行分析。结果本研究MEN2型MTC病例呈现典型RET基因突变;临床相关指标分析发现MEN2型MTC血清降钙素水平、肿瘤直径及转移淋巴结数量,均较非MEN2型MTC升高,差异均有统计学意义(t值分别为2.76、2.53、2.26,P值均<0.05)。免疫组织化学结果显示,生物钟基因CLOCK、BMAL1在MEN2型MTC癌组织中高表达,而在癌旁正常甲状腺滤泡内阴性表达,且表达水平高于非MEN2型MTC;qPCR结果显示,在MEN2型MTC癌组织中CLOCK基因表达量高于非MEN2型MTC以及癌旁正常组织的表达量,差异均有统计学意义(t值分别为2.68和2.86,P值均<0.05);BMAL1基因表达量高于非MEN2型MTC以及癌旁正常组织的表达量,差异均有统计学意义(t值分别为2.21和2.35,P值均<0.05)。相关性分析发现MEN2型MTC患者CLOCK、BMAL1基因表达水平与淋巴结转移数量呈正相关(r=0.65,P<0.001;r=0.52,P=0.005)。PPI网络分析发现RET和CLOCK间存在调控关系,依据qPCR结果做进一步的相关性分析,提示C
基金supported by the Capital Health Research and Development of Special (No. 2014-2-026)
文摘Objective: The American Thyroid Association (ATA) proposed a new risk classification for hereditary medullary thyroid carcinoma (MTC) in 2015. This study aimed to assess whether the new guidelines are suitable for the Chinese population, and reported our experience on prophylactic thyroidectomy. Methods: A total of 73 patients from 22 families were screened as rearranged during transfection (RET) mutation carriers from 2010 to 2016 in Cancer Hospital, Chinese Academy of Medical Science; the medical history for each patient was collected. Based on the initial treatment, we identified the risk factors for poor prognosis by univariate and multivariate logistic regression. Then, 4 RET mutation carriers were enrolled for prophylactic thyroidectomy, and their pathological data and follow-up outcomes were recorded. Results: In univariate and multivariate logistic regression analyses, age at initial surgery and risk classification were significant risk factors for stage III/IV hereditary MTC at initial diagnosis. The likelihood was increased by 11.6% per year of age at initial surgery [95% confidence interval (95% CI), 1.040-1.198; P=0.002). It was 7.888 times more likely to have III/IV stage disease for ATA highest risk patients, compared to ATA moderate risk individuals (95% CI, 1.607-38.717; P=0.003). Postoperative pathological results showed all 4 multiple endocrine neoplasia type 2A (MEN2A) patients had C-cell hyperplasia (CCH); multifocal malignancies were detected in 3 of them. All 4 patients were cured biochemically, and none developed permanent hypoparathyroidism. Conclusions: In Chinese individuals, hereditary MTC aggressiveness is in line with the new ATA risk classification. Germline RET gene mutation carriers should undergo prophylactic thyroidectomy according to basal serum calcitonin levels.
