Nat Commun:HER2阳性乳腺癌在双HER2阻断期间和之后的表型变化

2020-08-01 MedSci原创 MedSci原创

HER2阳性(HER2+)乳腺癌内的HER2富集型(HER2-E)亚型高度依赖HER2通路。然而,20-60%的HER2+/HER2-E肿瘤在抗HER2疗法后不能达到完全反应。在此,我们评估了PAME

HER2阳性(HER2+)乳腺癌内的HER2富集型(HER2-E)亚型高度依赖HER2通路。然而,20-60%的HER2+/HER2-E肿瘤在抗HER2疗法后不能达到完全反应。在此,我们评估了PAMELA试验的HER2+/HER2-E肿瘤和乳腺癌细胞系新辅助治疗前、治疗期间和治疗后的基因表达数据。

 

结果显示,HER2-E疾病的双重HER2阻断在患者的肿瘤和体外模型中都会诱导出低增殖的Luminal A表型。与HR阴性疾病相比,这些生物学变化在激素受体阳性(HR+)疾病中更为明显。有趣的是,用抗HER2治疗增加瘤体表型,增加了对CDK4/6抑制的敏感性。最后,在体外停止HER2靶向治疗,或对抗HER2治疗的获得性耐药,会导致原有HER2-E表型的恢复。

 

总之,该研究结果支持使用维持性抗HER2治疗和利用CDK4/6抑制进行亚型切换的治疗方法。

 

原始出处:

 

Fara Brasó-MaristanyGaia Griguolo, et al., Phenotypic changes of HER2-positive breast cancer during and after dual HER2 blockade. Nat Commun. 2020 Jan 20;11(1):385. doi: 10.1038/s41467-019-14111-3.

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    2021-01-31 liuli5079
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    2021-07-05 liye789132251
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    2020-08-05 ms3000000449926787

    学习

    0

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    2020-08-03 tastas

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三阴性乳腺癌被称为“最毒、最凶险”的乳腺癌,有不少患者经过多轮治疗、仍发生进展,面对“无药可救”的绝境。

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乳腺癌是女性中的常见高发癌种,也是女性恶性肿瘤死亡的主要原因之一。乳腺癌筛查是疾病早期发现的重要手段,但并不能延缓疾病进展,而已有数款药物可以有效降低乳腺癌的发病风险。

Dev Cell :利用谱系示踪技术无缝隙捕捉体内肿瘤转移中的EMT过程

由于乳腺癌细胞丧失了正常的细胞特性,细胞之间的连接变得松散,容易脱落,进入血液系统或者淋巴系统进行转移,在远端器官,如肺,骨,肝等器官处形成转移灶,威胁患者生命。对乳腺癌转移方式及其机理的研究意义重大

JAMA:绝经后激素干预对女性乳腺癌发病率及死亡率的影响

长期随访发现,对于子宫切除的绝经后女性,接受结合雌激素可降低乳腺癌发病率和死亡率,但对于保留子宫的参与者,激素干预会增加乳腺癌发病率

什么是节拍化疗?节拍化疗在乳腺癌和肺癌中的研究汇总

1971年美国哈佛医学院Folkman教授首次大胆地提出抑制肿瘤血管新生可以抑制肿瘤组织持续生长转移的假说,随着研究的深入,发现如果能够连续性给予低剂量的化疗药物,可能通过有效抑制肿瘤血管生长而控制肿

Nat Commun :全麻药在动物模型上通过IL-6通路影响乳腺癌转移

对恶性程度高的肿瘤如三阴性乳腺癌而言,即使完全切除了肿瘤及其累及的局部区域,癌症依然会复发或转移,成为导致病人死亡的主要原因。越多的研究表明手术围术期的用药和治疗会导致血液循环中的肿瘤细胞增多增强。