雌激素受体阳性乳腺癌的RB1遗传变化:与神经内分泌差异的相关性
Christopher J Schwartz1, Antonio Marra1, Pier Selenica1
1Department of Pathology and Laboratory Medicine, Memorial Sloan Kettering Cancer Center, New York, New York.
概括
视网膜母细胞瘤基因 (RB1) 的遗传变化在雌激素受体阳性乳腺癌 (BC) 中很少见. 双性RB1失活导致Rb蛋白损失,并与这些BC中的神经内分泌分化有关.
科学领域:
- 在瘤学瘤学.
- 遗传学 遗传学是一种遗传学.
- 分子生物学分子生物学
背景情况:
- 视网膜母细胞瘤敏感性基因 (RB1) 的遗传改变在三阴性乳腺癌 (BCs) 和神经内分泌瘤中很常见.
- 关于雌激素受体 (ER) 阳性BCsRB1变化的数据有限.
- 这项研究研究了ER阳性BCs具有体质RB1改变的特征.
研究的目的:
- 确定ER阳性BCs与RB1变化的形态,免疫组织化学和遗传特征.
- 探索RB1变化与神经内分泌分化之间的关联.
- 了解ER阳性BCs中RB1无活化的临床影响.
主要方法:
- 针对6026个BC的下一代测序,以确定具有致病性RB1变异的ER阳性病例 (N=55).
- 对神经内分泌标记物的组织学审查和免疫组织化学分析.
- 评估异性和Rb蛋白表达的损失.
主要成果:
- 在<1%的病例中发现了具有致病性RB1改变的ER阳性BC.
- 在大多数病例中 (82-90%),观察到双性RB1无活化 (突变和异性丧失).
- 神经内分泌形态和标志物表达存在于RB1-改变的瘤的一个子集 (分别为13%和39%),与双RB1无活化和Rb蛋白损失相关.
结论:
- 具有双RB1遗传变化的ER阳性BCs经常表现出Rb蛋白损失.
- 这种Rb损失与这些瘤的一个子集中的神经内分泌分化有关.
- 需要进一步研究以阐明ER阳性BCs中RB1无活化的临床意义.
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