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PLoS By Category | Recent PLoS Articles
Biochemistry - Biophysics - Molecular Biology - Oncology - Ophthalmology - Physics

Therapeutic Efficacy by Targeting Correction of Notch1-Induced Aberrants in Uveal Tumors
Published: Tuesday, August 28, 2012
Author: Xiaolin Huang et al.

by Xiaolin Huang, Li Wang, He Zhang, Haibo Wang, Xiaoping Zhao, Guanxiang Qian, Jifan Hu, Shengfang Ge, Xianqun Fan

There is a need for more effective treatments for uveal melanoma. The recombinant oncolytic adenovirus H101 replicates specifically in p53-depleted tumor cells, and has been approved for use by the Chinese State Food and Drug Administration. However, this treatment is associated with subsequent remission. Transfection of uveal melanoma cells with a small interfering RNA against Notch1 (siNotch1) effectively suppressed Notch1 expression, resulting in significant cell growth inhibition when combined with H101 treatment. Combined treatment with siNotch1 and H101 (H101-Notch1-siRNA) greatly enhanced apoptosis and cell cycle arrest in vitro as compared to treatment with H101 or siNotch1 alone. For in vivo treatments, the combined treatment of siNotch1 and H101 showed remarkable tumor growth inhibition and prolonged mouse survival in the OCM1 xenograft model. We predict that Notch pathway deregulation could be a feature of uveal melanoma, and could be a therapeutic target, especially if p53 is concurrently targeted.
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