An EphB-Abl signaling pathway is associated with intestinal tumor initiation and growth

Kundu, P. et al. (2015) An EphB-Abl signaling pathway is associated with intestinal tumor initiation and growth. Science Translational Medicine, 7(281), 281ra44. (doi: 10.1126/scitranslmed.3010567) (PMID:25834110)

Abstract

EphB receptors regulate the proliferation and positioning of intestinal stem and progenitor cells. In addition, they can act as tumor promoters for adenoma development but suppress progression to invasive carcinoma. We used imatinib to abrogate Abl kinase activity in ApcMin/+ mice and in mice with LGR5+ stem cells that were genetically engineered to develop adenomatous polyposis coli. Imatinib treatment inhibited the tumor-promoting effects of EphB signaling without attenuating EphB-mediated tumor suppression, demonstrating a role for EphB signaling in the initiation of intestinal tumors. The imatinib treatment regimen extended the life span of ApcMin/+ mice and reduced cell proliferation in cultured slices of adenomas from patients with familial adenomatous polyposis. These findings connect the EphB signaling pathway to the regulation of intestinal adenoma initiation via Abl kinase. Our findings may have clinical implications for pharmacological therapy against adenoma formation and cancer progression in patients predisposed to develop colorectal cancer.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Tan, Dr Ee and Ridgway, Dr Rachel and Sansom, Professor Owen
• Authors: Kundu, P., Genander, M., Straat, K., Classon, J., Ridgway, R.A., Tan, E.H., Bjork, J., Martling, A., van Es, J., Sansom, O.J., Clevers, H., Pettersson, S., and Frisen, J.
• College/School: College of Medical Veterinary and Life Sciences > School of Cancer Sciences
• Journal Name: Science Translational Medicine
• Publisher: American Association for the Advancement of Science
• ISSN: 1946-6234
• ISSN (Online): 1946-6242