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ErbB2 and TGF-beta: a cooperative role in mammary tumor progression?

机译:ErbB2和TGF-β:在乳腺肿瘤进展中具有协同作用吗?

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摘要

Amplification and overexpression of ErbB2 (HER2/Neu) is one of the most common alterations associated with breast cancer. Activation of ErbB2 via homodimerization in a non-transformed human mammary epithelial cell line, MCF-10A, in basement membrane cultures leads to formation of proliferative structures that share properties with non-invasive early stage lesions. Recently, we have shown that activation of ErbB2 homodimers combined with expression of transforming growth factor (TGF)-beta induces invasive and migratory activity in MCF-10A cells. In this system, migration requires inputs from numerous cellular pathways. We discuss this data and a model for migration induced by ErbB2 and TGF-beta. Concurrent studies by other groups have also shown that ErbB2 and TGF-beta can cooperate to increase metastatic and invasive behavior in murine mammary tumors. Here we discuss these studies and the potential implications of this research on breast cancer therapeutics.
机译:ErbB2(HER2 / Neu)的扩增和过表达是与乳腺癌相关的最常见改变之一。在基底膜培养物中,在未转化的人类乳腺上皮细胞系MCF-10A中通过均二聚作用激活ErbB2,导致形成与非侵袭性早期病变共享特性的增殖结构。最近,我们已经表明,ErbB2同型二聚体的激活与转化生长因子(TGF)-β的表达相结合,可诱导MCF-10A细胞的侵袭和迁移活性。在该系统中,迁移需要来自众多细胞途径的输入。我们讨论此数据和ErbB2和TGF-β诱导的迁移模型。其他小组的并行研究也表明,ErbB2和TGF-β可以协同作用,以增加鼠类乳腺肿瘤的转移和侵袭行为。在这里,我们讨论这些研究以及该研究对乳腺癌治疗的潜在影响。

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