Browse views: by Year, by Function, by GLF, by Subfunction, by Conference, by Journal

Insulin-like growth factor-I receptor blockade by a specific tyrosine kinase inhibitor for human gastrointestinal carcinomas.

Piao, Wenhua and Wang, Yu and Adachi, Yasushi and Yamamoto, Hiroyuki and Li, Rong and Imsumran, Arisa and Li, Hua and Maehata, Tadateru and Ii, Masanori and Arimura, Yoshiaki and Lee, Choon-Taek and Shinomura, Yasuhisa and Carbone, David P and Imai, Kohzoh (2008) Insulin-like growth factor-I receptor blockade by a specific tyrosine kinase inhibitor for human gastrointestinal carcinomas. Molecular cancer therapeutics, 7 (6). pp. 1483-1493. ISSN 1535-7163


Insulin-like growth factor-I receptor (IGF-IR) signaling is required for carcinogenicity and proliferation of gastrointestinal (GI) cancers. In this study, we sought to evaluate the effect of a new tyrosine kinase inhibitor of IGF-IR, NVP-AEW541, on the signal transduction and the progression of GI carcinomas. We assessed the effect of NVP-AEW541 on signal transduction, proliferation, survival, and migration in four GI cancer cells: colorectal adenocarcinoma HT29, pancreatic adenocarcinoma BxPC3, esophageal squamous cell carcinoma TE1, and hepatoma PLC/PRF/5. The effects of NVP-AEW541 alone and with chemotherapy were studied in vitro and in nude mouse xenografts. We also analyzed the effects of NVP-AEW541 on insulin signals and hybrid receptor formation between IGF-IR and insulin receptor. NVP-AEW541 blocked autophosphorylation of IGF-IR and both Akt and extracellular signal-regulated kinase activation by IGF but not by insulin. NVP-AEW541 suppressed proliferation and tumorigenicity in vitro in a dose-dependent manner in all cell lines. The drug inhibited tumor as a single agent and, when combined with stressors, up-regulated apoptosis in a dose-dependent fashion and inhibited mobility. NVP-AEW541 augmented the effects of chemotherapy on in vitro growth and induction of apoptosis. Moreover, the combination of NVP-AEW541 and chemotherapy was highly effective against tumors in mice. This compound did not influence hybrid receptor formation. Thus, NVP-AEW541 may have significant therapeutic utility in human GI carcinomas both alone and in combination with chemotherapy.

Item Type: Article
Related URLs:
Additional Information: author can archive post-print (ie final draft post-refereeing); Authors final version may be deposited on institutional website/ repository if required by institution
Related URLs:
Date Deposited: 13 Oct 2015 13:14
Last Modified: 13 Oct 2015 13:14


Email Alerts

Register with OAK to receive email alerts for saved searches.