Nano Archive

Carbon nanotube-enhanced thermal destruction of cancer cells in a noninvasive radiofrequency field

Gannon, Christopher J. and Cherukuri, Paul and Yakobson, Boris I. and Cognet, Laurent and Kanzius, John S. and Kittrell, Carter and Weisman, R. Bruce and Pasquali, Matteo and Schmidt, Howard K. and Smalley, Richard E. and Curley, Steven A. (2007) Carbon nanotube-enhanced thermal destruction of cancer cells in a noninvasive radiofrequency field. CANCER, 110 (12). pp. 2654-2665.

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BACKGROUND. Single-walled carbon nanotubes (SWNTs) have remarkable physicochemical properties that may have several medical applications. The authors have discovered a novel property of SVVNTs - heat release in a radiofrequency (RF) field-that they hypothesized may be used to produce thermal cytotoxicity in malignant cells. METHODS. Functionalized, water-soluble SWNTs were exposed to a noninvasive, 13.56-megahertz RF field, and heating characteristics were measured with infrared thermography. Three human cancer cell lines were incubated with various concentrations of SWNTs and then treated in the RF field. Cytotoxicity was measured by fluorescence-activated cell sorting. Hepatic VX2 tumors in rabbits were injected with SWNTs or with control solutions and were treated in the RF field. Tumors were harvested 48 hours later to assess viability. RESULTS. The RF field induced efficient heating of aqueous suspensions of SWNTs. This phenomenon was used to produce a noninvasive, selective, and SWNT concentration-dependent thermal destruction in vitro of human cancer cells that contained internalized SWNTs. Direct intratumoral injection of SWTs in vivo followed by immediate RF field treatment was tolerated well by rabbits bearing hepatic VX2 tumors. At 48 hours, all SWNT-treated tumors demonstrated complete necrosis, whereas control tumors that were treated with RF without SWNTs remained completely viable. Tumors that were injected with SWNTs but were not treated with RF also were viable. CONCLUSIONS. The current results suggested that SWNTs targeted to cancer cells may allow noninvasive RF field treatments to produce lethal thermal injury to the malignant cells. Now, the authors are developing SWNTs coupled with cancer cell-targeting agents to enhance SWNT uptake by cancer cells while limiting uptake by normal cells.

Item Type:Article
Uncontrolled Keywords:carbon nanotubes; radiofrequency; thermal cytotoxicity; cancer cells
Subjects:Biomedical Science > Nanobiotechnology
Biomedical Science > Nanomedicine
ID Code:245
Deposited By:Lesley Tobin
Deposited On:28 Nov 2008 17:02
Last Modified:09 Feb 2009 16:48

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