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布拉基瑞和IGF1R:在儿科甲状腺结节病理学中潜在的对立作用
Ayelen Martin1, María Celia Fernandez1, Sofía Miraglia1
1Centro de Investigaciones Endocrinológicas Dr. César Bergadá (CEDIE), Fundación de Endocrinología Infantil (FEI), División de Endocrinología, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Hospital de Niños Ricardo Gutiérrez, Gallo 1330, Buenos Aires, C1425EFD, Argentina.
勃拉基瑞 (Brachy) 通过驱动上皮细胞转换为介质细胞转换 (EMT) 来促进儿童的侵袭性甲状腺癌,而类似胰岛素的生长因子受体1型 (IGF1R) 抑制瘤生长,这表明甲状腺瘤发生中的作用相反.
科学领域:
- 儿科瘤学 儿科瘤学
- 分子生物学分子生物学
- 内分泌学 在内分泌学.
背景情况:
- 儿童甲状腺癌,主要是乳头甲状腺癌 (PTC),呈现出侵略性,恶性瘤的风险高于成人.
- 皮质到介质细胞的过渡 (EMT),受像Brachyury (Brachy) 和胰岛素样生长因子 (IGFs) 这样的转录因子的影响,与甲状腺瘤发生有关.
研究的目的:
- 研究小儿甲状腺结核中的Brachyury (Brachy) 和胰岛素类生长因子受体1型 (IGF1R) 的表达.
- 探索Brachy和IGF1R在甲状腺乳腺癌 (PTC) 细胞行为中的功能性作用,体外和体内瘤生长.
主要方法:
- 分析了62个小儿甲状腺结节样本 (29个PTC,9个FA,24个BTN),使用免疫组织化学检测Brachy和IGF1R的表达.
- 在TPC-1细胞中过度表达的Brachy和IGF1R,以评估对活力,运动性和EMT标记物的 in vitro影响.
- 在体内评估瘤生长,使用来自Brachy或IGF1R过度表达的细胞的异种移植模型.
主要成果:
- 甲状腺和IGF1R在PTC和卵泡腺瘤 (FA) 中表达,但不在良性甲状腺结节 (BTN) 中表达.
- 胸腔过度表达促进了介质细胞的特征,增加了活力和运动性,并在TPC-1细胞中增强了EMT标记物.
- 过度表达IGF1R增强了上皮特征和减少了细胞增殖;IGF1刺激进一步增加了Brachy诱导的增殖.
- 在体内,Brachy过度表达瘤的生长速度快于IGF1R过度表达瘤.
结论:
- 在小儿甲状腺癌中,Brachy通过驱动EMT促进了更具攻击性的表型.
- IGF1R似乎通过支持上皮特征和减少增殖来抵消瘤的进展.
- 勃拉基和IGF1R在儿科甲状腺瘤生物学中表现出对立的作用,提供了潜在的治疗点.
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