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New medical, research tool possible by probing cell mechanics
Date:11/21/2011

the mechanical properties of the tiniest cellular structures.

"The maps identify the mechanical properties of different parts of a cell, whether they are soft or rigid or squishy," said Raman, who is working with doctoral student Alexander Cartagena and other researchers. "The key point is that now we can do it at high resolution and higher speed than conventional techniques."

The high-speed capability makes it possible to watch living cells and observe biological processes in real time. Such a technique offers the hope of developing a "mechanobiology-based" assay to complement standard biochemical assays.

"The atomic force microscope is the only tool that allows you to map the mechanical properties - take a photograph, if you will - of the mechanical properties of a live cell," Raman said.

However, existing techniques for mapping these properties using the atomic force microscope are either too slow or don't have high enough resolution.

"This innovation overcomes those limitations, mostly through improvements in signal processing," Raman said. "You don't need new equipment, so it's an economical way to bump up pixels per minute and get quantitative information. Most importantly, we applied the technique to three very different kinds of cells: bacteria, human red blood cells and rat fibroblasts. This demonstrates its potential broad utility in medicine and research."

The technique is nearly five times faster than standard atomic force microscope techniques.


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Contact: Emil Venere
venere@purdue.edu
765-494-4709
Purdue University
Source:Eurekalert  

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