{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,9,10]],"date-time":"2025-09-10T23:23:10Z","timestamp":1757546590626},"reference-count":61,"publisher":"Wiley","issue":"6","license":[{"start":{"date-parts":[[2008,10,20]],"date-time":"2008-10-20T00:00:00Z","timestamp":1224460800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Intl Journal of Cancer"],"published-print":{"date-parts":[[2009,3,15]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>The Eph receptor A2 (EphA2) is overexpressed in a range of human epithelial cancers, a phenotype that is associated with cancer cell proliferation, progression and angiogenesis. Mouse models of mammary neoplasia have confirmed the role of EphA2 as mice carrying a knockout allele of <jats:italic>EphA2<\/jats:italic> were resistant to breast cancer, a phenotype that was associated with interactions between EphA2 and ErbB2. We investigated <jats:italic>in vivo<\/jats:italic> the role of <jats:italic>EphA2<\/jats:italic> in GI cancer. To determine whether <jats:italic>EphA2<\/jats:italic> influences intestinal tumorigenesis, we used qRT\u2010PCR to examine the mRNA expression levels of <jats:italic>EphA2<\/jats:italic> in tumors from the small intestine and colon of <jats:italic>Apc<\/jats:italic><jats:sup>Min\/+<\/jats:sup> mice. We found that EphA2 was significantly up\u2010regulated in tumors from both regions when compared with normal control tissues. We then evaluated the spatial expression patterns of EphA2 protein using immunohistochemistry in both the small intestine and colon and found that in normal tissues EphA2 was robustly expressed in highly differentiated cells, such as cells of the villi, but that EphA2 expression was largely absent from the stem cell niche and proliferative zones of intestinal crypts. In contrast, in tumors EphA2 was broadly expressed. Finally, we created a strain of <jats:italic>Apc<\/jats:italic><jats:sup>Min\/+<\/jats:sup> mice carrying a genetic knockout of the EphA2 gene. These mice developed significantly fewer and smaller tumors in both the small and large intestine. Overall, our results indicate that EphA2 plays an oncogenic role in the mammalian intestine suggesting that strategies to target EphA2 activity may offer new therapeutic modalities for colorectal cancer. \u00a9 2008 Wiley\u2010Liss, Inc.<\/jats:p>","DOI":"10.1002\/ijc.24083","type":"journal-article","created":{"date-parts":[[2008,10,20]],"date-time":"2008-10-20T18:18:27Z","timestamp":1224526707000},"page":"1366-1371","source":"Crossref","is-referenced-by-count":21,"title":["Loss of EphA2 receptor tyrosine kinase reduces <i>Apc<\/i><sup>min\/+<\/sup> tumorigenesis"],"prefix":"10.1002","volume":"124","author":[{"given":"Christina","family":"Bogan","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jin","family":"Chen","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"M. 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