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New Advance Technique Detects Ovarian Cancer Early

by Hannah Joy on December 1, 2017 at 12:12 PM
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New Advance Technique Detects Ovarian Cancer Early

A novel noninvasive technique developed uses a single-walled carbon nanotubes to detect specific tumors in the body. This is the first time in vivo tests have been done to detect and treat ovarian cancers early and accurately, reveals a new study.

The Rice lab of chemist Bruce Weisman, a pioneer in the discovery and interpretation of the phenomenon, reported the new results in the American Chemical Society journal ACS Applied Materials and Interfaces.

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For this study, the researchers used the technique to pinpoint small concentrations of nanotubes inside rodents.

The lab of co-author Dr. Robert Bast Jr., an expert in ovarian cancer and vice president for translational research at MD Anderson, inserted gel-bound carbon nanotubes into the ovaries of rodents to mimic the accumulations that are expected for nanotubes linked to special antibodies that recognize tumor cells.
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The rodents were then scanned with the Rice lab's custom-built optical device to detect the faint emission signatures of as little as 100 picograms of nanotubes.

The device irradiated the rodents with intense red light from an array of light-emitting diodes and read fluorescent signals with a specialized sensitive detector. Because different types of tissue absorb emissions from the nanotubes differently, the scanner took readings from many locations to triangulate the tumor's exact location, as confirmed by later MRI scans.

Weisman said it should be possible to noninvasively find small ovarian tumors within rodents used for medical research by linking nanotubes to antibody biomarkers and administering the biomarkers intravenously.

The biomarkers would accumulate at the tumor site. He said more refined versions of the optical scanner may then be able to locate a tumor within seconds, and further advances may extend the method's application to human cancer detection.

The new results suggested that antibody-nanotube probes could potentially detect tumors with as few as 100 ovarian cancer cells, which could make it a valuable tool for early detection.



Source: Eurekalert
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