Src42A modulates tumor invasion and cell death via Ben/dUev1a-mediated JNK activation in Drosophila.

Src42A modulates tumor invasion and cell death via Ben/dUev1a-mediated JNK activation in Drosophila.
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Src42A 通过 Ben/dUev1a 介导的果蝇 JNK 激活调节肿瘤侵袭和细胞死亡

DOI:
10.1038/cddis.2013.392
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发表时间:
2013-10-17
影响因子:
9
通讯作者:
--
中科院分区:
生物学1区
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细胞极性基因的缺失可能与致癌Ras协同驱动肿瘤生长和侵袭,而这在果蝇中主要依赖于c-Jun n -末端激酶(JNK)信号通路。通过基因筛选,我们发现哺乳动物Src的同源基因Src42A是Ras V12/lgl−/−触发的肿瘤侵袭和细胞极性缺失基因诱导的细胞迁移的关键调节剂。我们的遗传研究进一步证明,Bendless (Ben)/dUev1a泛素E2复合物是src42a诱导的jnk介导的细胞迁移的重要调节因子。此外,我们发现异位Ben/dUev1a表达诱导了侵袭性细胞迁移,同时增加了翼盘上皮中MMP1的产生。Ben/dUev1a可与Ras V12协同促进肿瘤过度生长和侵袭。此外,我们发现Ben/dUev1a复合体是异位src42a触发的细胞死亡和内源性src42a依赖性胸腔闭合所必需的。我们的数据不仅为Src在发育和疾病中的作用提供了机制见解,而且还提出了Ben和dUev1a的哺乳动物同源物Ubc13和Uev1a的潜在致癌功能。
Loss of the cell polarity gene could cooperate with oncogenic Ras to drive tumor growth and invasion, which critically depends on the c-Jun N-terminal Kinase (JNK) signaling pathway in Drosophila. By performing a genetic screen, we have identified Src42A, the ortholog of mammalian Src, as a key modulator of both Ras V12/lgl−/− triggered tumor invasion and loss of cell polarity gene-induced cell migration. Our genetic study further demonstrated that the Bendless (Ben)/dUev1a ubiquitin E2 complex is an essential regulator of Src42A-induced, JNK-mediated cell migration. Furthermore, we showed that ectopic Ben/dUev1a expression induced invasive cell migration along with increased MMP1 production in wing disc epithelia. Moreover, Ben/dUev1a could cooperate with Ras V12 to promote tumor overgrowth and invasion. In addition, we found that the Ben/dUev1a complex is required for ectopic Src42A-triggered cell death and endogenous Src42A-dependent thorax closure. Our data not only provide a mechanistic insight into the role of Src in development and disease but also propose a potential oncogenic function for Ubc13 and Uev1a, the mammalian homologs of Ben and dUev1a.
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