Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 2 of 2
Full-Text Articles in Cancer Biology
Rho Gtpases: Big Players In Breast Cancer Initiation, Metastasis And Therapeutic Responses, Brock Humphries, Zhishan Wang, Chengfeng Yang
Rho Gtpases: Big Players In Breast Cancer Initiation, Metastasis And Therapeutic Responses, Brock Humphries, Zhishan Wang, Chengfeng Yang
Toxicology and Cancer Biology Faculty Publications
Rho GTPases, a family of the Ras GTPase superfamily, are key regulators of the actin cytoskeleton. They were originally thought to primarily affect cell migration and invasion; however, recent advances in our understanding of the biology and function of Rho GTPases have demonstrated their diverse roles within the cell, including membrane trafficking, gene transcription, migration, invasion, adhesion, survival and growth. As these processes are critically involved in cancer initiation, metastasis and therapeutic responses, it is not surprising that studies have demonstrated important roles of Rho GTPases in cancer. Although the majority of data indicates an oncogenic role of Rho GTPases, …
Igf-1r Inhibition Induces Mek Phosphorylation To Promote Survival In Colon Carcinomas, Qing Wang, Yan Zhang, Jiang Zhu, Honggang Zheng, Shuntai Chen, Li Chen, Hsin-Sheng Yang
Igf-1r Inhibition Induces Mek Phosphorylation To Promote Survival In Colon Carcinomas, Qing Wang, Yan Zhang, Jiang Zhu, Honggang Zheng, Shuntai Chen, Li Chen, Hsin-Sheng Yang
Toxicology and Cancer Biology Faculty Publications
The insulin-like growth factor 1 receptor (IGF-1R) governs several signaling pathways for cell proliferation, survival, and anti-apoptosis. Thus, targeting IGF-1R appears as a reasonable rationale for tumor treatment. However, clinical studies showed that inhibition of IGF-1R has very limited efficacy due to the development of resistance to IGF-1R blockade in tumor cells. Here, we discovered that prolonged treatment of colon cancer cells with IGF-1R inhibitors (BMS-754807 and GSK1838705A) stimulates p70 KDa ribosomal protein S6 kinase 1 (p70S6K1) activation, a well-known kinase signaling for cell survival. We also found that p70S6K1 activation by IGF-1R inhibition is independent of K-Ras and PIK3CA …