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• W2083471616 abstract "The Eph and Ephrin proteins, which constitute the largest family of receptor tyrosine kinases, are involved in normal tissue development and cancer progression. Here, we examined the expression and role of the B-type Eph receptor EphB2 in breast cancers. By immunohistochemistry using a progression tissue microarray of human clinical samples, we found EphB2 to be expressed in benign tissues, but strongly increased in cancers particularly in invasive and metastatic carcinomas. Subsequently, we found evidence that EphB2, whose expression varies in established cell breast lines, possesses multiple functions. First, the use of a DOX-inducible system to restore EphB2 function to low expressers resulted in decreased tumor growth in vitro and in vivo, while its siRNA-mediated silencing in high expressers increased growth. This function involves the onset of apoptotic death paralleled by caspases 3 and 9 activation. Second, EphB2 was also found to induce autophagy, as assessed by immunofluorescence and/or immunoblotting examination of the LC3, ATG5 and ATG12 markers. Third, EphB2 also has a pro-invasive function in breast cancer cells that involves the regulation of MMP2 and MMP9 metalloproteases and can be blocked by treatment with respective neutralizing antibodies. Furthermore, EphB2-induced invasion is kinase-dependent and is impeded in cells expressing a kinase-dead mutant EphB2. In summary, we identified a mechanism involving a triple role for EphB2 in breast cancer progression, whereby it regulates apoptosis, autophagy, and invasion." @default.
• W2083471616 created "2016-06-24" @default.
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• W2083471616 date "2014-01-01" @default.
• W2083471616 modified "2023-09-23" @default.
• W2083471616 title "Role of the EphB2 receptor in autophagy, apoptosis and invasion in human breast cancer cells" @default.
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• W2083471616 doi "https://doi.org/10.1016/j.yexcr.2013.10.022" @default.
• W2083471616 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/24211352" @default.
• W2083471616 hasPublicationYear "2014" @default.
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