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Researchers create smaller, brighter probe tailored for molecular imaging and tumor targeting
Date:12/22/2008

Researchers have developed a new generation of microscopic particles for molecular imaging, constituting one of the first promising nanoparticle platforms that may be readily adapted for tumor targeting and treatment in the clinic.

According to the investigators at Memorial Sloan-Kettering Cancer Center (MSKCC) and Cornell University, these particles are biologically safe, stable, and small enough to be easily transported across the body's structures and efficiently excreted through the urine. It is the first time that all of these properties have been successfully engineered on a single-particle platform, called "C dots," in order to optimize the biological behavior and imaging properties of nanoparticles for use in a wide array of biomedical and life science applications. The work will be published in the January 2009 issue of Nano Letters.

"Highly sensitive and specific probes and molecular imaging strategies are critical to ensure the earliest possible detection of a tumor and timely response to treatment," said the study's senior author, Michelle Bradbury, MD/PhD, a physician-scientist specializing in molecular imaging and neuroradiology at MSKCC. "Our findings may now be translated to the investigation of tumor targeting and treatment in the clinic, with the goal of ultimately helping physicians to better tailor treatment to a patient's individual tumor."

Imaging experiments in mice conducted at MSKCC showed that this new particle platform, or "probe," can be molecularly customized to target surface receptors or other molecules that are expressed on tumor surfaces or even within tumors, and then imaged to evaluate various biological properties of the tumor, including the extent of a tumor's blood vessels, cell death, treatment response, and invasive or metastatic spread to lymph nodes and distant organs.

"Importantly, the ability to define patients that express certain types of molecules on their tumor surfaces
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Contact: Esther Napolitano
napolite@mskcc.org
212-639-3573
Memorial Sloan-Kettering Cancer Center
Source:Eurekalert

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