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Novel nanotechnology collaboration leads to breakthrough in cancer research
Date:9/1/2010

genetics and the study's other lead author. Zhou uses cryo-electron microscopy (cryoEM) to produce atomically accurate three-dimensional models of biological samples such as viruses.

Wu, who is also a researcher at the California NanoSystems Institute (CNSI) at UCLA, learned of Zhou's work after he was jointly recruited to UCLA from the University of Texas Medical School at Houston by the UCLA Department of Microbiology, Immunology and Molecular Genetics and UCLA's CNSI.

About a year ago, once the transfer of Zhou's lab was complete, Sok Boon Koh, one of Wu's students, sought out Zhou's group for their expertise and initiated the collaboration.

"This project exemplifies my excitement about being part of an institute as innovative as CNSI," Zhou said. "Not only am I able to work with state-of-the-art equipment, but because CNSI is the hub for nanotechnology research and commercialization at UCLA, I have the opportunity to collaborate with colleagues across many disciplines."

Working in the Electron Imaging Center for Nanomachines at the CNSI, a lab run by Zhou, the researchers used cryoEM to create a 3-D reconstruction of the human adenovirus from 31,815 individual particle images.

"Because the reconstruction reveals details up to a resolution of 3.6 angstroms, we are able to build an atomic model of the entire virus, showing precisely how the viral proteins all fit together and interact," Zhou said. An angstrom is the distance between the two hydrogen atoms in a water molecule, and the entire adenovirus is about 920 angstroms in diameter.

Armed with this new understanding, Wu and her group are now moving forward with their engineered versions of adenovirus to use for gene therapy treatment of cancer.

"This breakthrough is a great leap forward, but there are still many obstacles to overcome," Wu said. "If our work is successful, this therapy could be used to treat most forms of cancer, but
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Contact: Mike Rodewald
mrodewald@cnsi.ucla.edu
310-267-5883
University of California - Los Angeles
Source:Eurekalert

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