GATA3 targets semaphorin 3B in mammary epithelial cells to suppress breast cancer progression and metastasis.

GATA3 targets semaphorin 3B in mammary epithelial cells to suppress breast cancer progression and metastasis.
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DOI:
10.1038/onc.2017.165
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发表时间:
2017-10-05
期刊:
影响因子:
8
通讯作者:
Werb Z
Werb Z
中科院分区:
医学1区
文献类型:
--
作者:
Shahi P;Wang CY;Chou J;Hagerling C;Gonzalez Velozo H;Ruderisch A;Yu Y;Lai MD;Werb Z

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Semaphorin 3B(SEMA3B)是一种分泌型轴突导向分子,在发育期间和整个成年期表达。最近,SEMA3B已经成为非神经元细胞中的肿瘤抑制因子。在这里,我们表明,SEMA3B是GATA 3转录活性的直接靶标。GATA3是一个关键的转录因子,调节乳腺腔细胞分化和肿瘤抑制相关基因。我们发现GATA 3依赖于SEMA3B来抑制肿瘤生长。SEMA3B的缺失使GATA 3失活并促进侵袭性乳腺癌的发展。SEMA3B在缺乏GATA 3的细胞中的过表达诱导GATA 3样表型,并且更高水平的SEMA3B与更好的癌症患者预后相关。此外,SEMA3B干扰LIM激酶(LIMK 1和LIMK 2)的活化以消除乳腺癌进展。我们的数据为SEMA3B在乳腺中的作用提供了新的见解,并提供了一个新的GATA 3信号传导分支,该分支对于抑制乳腺癌进展和转移至关重要。
Semaphorin 3B (SEMA3B) is a secreted axonal guidance molecule that is expressed during development and throughout adulthood. Recently, SEMA3B has emerged as a tumor suppressor in non-neuronal cells. Here we show that SEMA3B is a direct target of GATA3 transcriptional activity. GATA3 is a key transcription factor that regulates genes involved in mammary luminal cell differentiation and tumor suppression. We show that GATA3 relies on SEMA3B for suppression of tumor growth. Loss of SEMA3B renders GATA3 inactive and promotes aggressive breast cancer development. Overexpression of SEMA3B in cells lacking GATA3 induces a GATA3-like phenotype and higher levels of SEMA3B are associated with better cancer patient prognosis. Moreover, SEMA3B interferes with activation of LIM kinases (LIMK1 and LIMK2) to abrogate breast cancer progression. Our data provide new insights into the role of SEMA3B in mammary gland and provides a new branch of GATA3 signaling that is pivotal for inhibition of breast cancer progression and metastasis.
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