Dr. Takahiro Ochiya Profile

Dr. Takahiro Ochiya

Head of Lab at National Cancer Ctr

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Proceedings Article | 13 February 2008 Paper

Optical imaging of RNAi-mediated silencing of cancer

Takahiro Ochiya, Kimi Honma, Fumitaka Takeshita, Shunji Nagahara

Proceedings Volume 6868, 68680H (2008) https://doi.org/10.1117/12.774484

KEYWORDS: Cancer, Tumors, Animal model studies, Tumor growth modeling, In vivo imaging, Optical imaging, Molecules, Oncology, In vitro testing, Systems modeling

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RNAi has rapidly become a powerful tool for drug target discovery and validation in an in vitro culture system and, consequently, interest is rapidly growing for extension of its application to in vivo systems, such as animal disease models and human therapeutics. Cancer is one obvious application for RNAi therapeutics, because abnormal gene expression is thought to contribute to the pathogenesis and maintenance of the malignant phenotype of cancer and thereby many oncogenes and cell-signaling molecules present enticing drug target possibilities. RNAi, potent and specific, could silence tumor-related genes and would appear to be a rational approach to inhibit tumor growth. In subsequent in vivo studies, the appropriate cancer model must be developed for an evaluation of siRNA effects on tumors. How to evaluate the effect of siRNA in an in vivo therapeutic model is also important. Accelerating the analyses of these models and improving their predictive value through whole animal imaging methods, which provide cancer inhibition in real time and are sensitive to subtle changes, are crucial for rapid advancement of these approaches. Bioluminescent imaging is one of these optically based imaging methods that enable rapid in vivo analyses of a variety of cellular and molecular events with extreme sensitivity.

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