Overcoming cardiac pacemaker "source-sink mismatch"

Instead of complication-prone electronic cardiac pacemakers, biomedical engineers at Georgia Tech and Emory envision the creation of “biological Read more

Hope Clinic part of push to optimize HIV vaccine components

Ten years ago, the results of the RV144 trial– conducted in Thailand with the help of the US Army -- re-energized the HIV vaccine field, which had been down in the Read more

Invasive cancer cells marked by distinctive mutations

What does it take to be a leader – of cancer cells? Adam Marcus and colleagues at Winship Cancer Institute are back, with an analysis of mutations that drive metastatic behavior among groups of lung cancer cells. The findings were published this week on the cover of Journal of Cell Science, and suggest pharmacological strategies to intervene against or prevent metastasis. Marcus and former graduate student Jessica Konen previously developed a technique for selectively labeling “leader” Read more

Analytical Chemistry

Device for viewing glowing brain tumors

People touched by a brain tumor — patients, their families or friends — may have heard of the drug Gliolan or 5-ALA, which is taken up preferentially by tumor cells and makes them fluorescent. The idea behind it is straightforward: if the neurosurgeon can see the tumor’s boundaries better during surgery, he or she can excise it more thoroughly and accurately.

5-ALA is approved for use in Europe but is still undergoing evaluation by the U.S. FDA. A team at Emory was the first to test this drug in the United States. [Note: A similar approach, based on protease activation of a fluorescent probe, was reported last week in Science Translational Medicine.]


A hand-held device to detect glowing brain tumors could allow closer access to the critical area than a surgical microscope

Biomedical engineer Shuming Nie and colleagues recently described their development of a hand-held spectroscopic device for viewing fluorescent brain tumors. This presents a contrast with the current tool, a surgical microscope — see figure.

Nie’s team tested their technology on specimens obtained from cancer surgeries. Their paper in Analytical Chemistry reports:

The results indicate that intraoperative spectroscopy is at least 3 orders of magnitude more sensitive than the current surgical microscopes, allowing ultrasensitive detection of as few as 1000 tumor cells. Read more

Posted on by Quinn Eastman in Cancer Leave a comment