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First-of-its-kind self-assembled nanoparticle for targeted and triggered thermo-chemotherapy
Date:10/25/2012

NA strands come together, the targeted gold nanorod is formed and the double stranded DNA serves as the scaffold for binding the chemotherapy drug, doxorubicin, which can be released in response to NIR light that concurrently results in generation of heat by the gold nanorods.

"This new platform is comprised of three distinct functional components and each plays a role in contributing to the triple punch of triggered thermotherapy, controlled doxorubicin release, and cancer cell targeting," explained Zeyu Xiao, PhD, a postdoctoral fellow at BWH and lead author of this study.

To demonstrate the robust capability of this nanorod system, Farokhzad and colleagues used a pre-clinical model to evaluate the in vivo anti-tumor efficacy in two different tumor models and four different groups with different drug regiments, each group varying in weight and tumor size. Researchers administrated an injection of the novel, self-assembled nanoparticle and then 10 minutes post-injection, the tumors were irradiated using NIR light that activated the nanoparticle using the gold nanorod and created heat. The results showed that this platform successfully delivered heat and anti-cancer drugs and synergistically eradicated tumors.

"Thermal ablation is already commonly used in cancer treatment," said Dr. Farokhzad. "What is extremely exciting about this platform is that we are able to selectively target cancer cells and then hit the tumor twice: first with a controlled release of a chemotherapy drug and then secondly with triggered induction of heat from the activation of the gold nanorod. And all this can be done noninvasively."

Researchers acknowledge that more research is necessary in other pre-clinical models before testing the safety and efficacy of this platform in human clinical trials.


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Contact: Lori J. Schroth
ljschroth@partners.org
617-534-1604
Brigham and Women's Hospital
Source:Eurekalert

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