Posts Tagged ‘cell biology’

Precision Motion Tracking – Thousands of Cells at a Time

 :: Posted by American Biotechnologist on 09-18-2012

Researchers have developed a new way to observe and track large numbers of rapidly moving objects under a microscope, capturing precise motion paths in three dimensions.

Over the course of the study–reported online Sept. 17, 2012, in the Proceedings of the National Academy of Sciences–researchers followed an unprecedented 24,000 rapidly moving cells over wide fields of view and through large sample volumes, recording each cell’s path for as long as 20 seconds.

“We can very precisely track the motion of small things, more than a thousand of them at the same time, in parallel,” says research lead and National Science Foundation CAREER awardee Aydogan Ozcan. an electrical engineering and bioengineering professor at UCLA. “We were able to achieve sub-micron accuracy over a large volume, allowing us to understand, statistically, how thousands of objects move in different ways.”

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Google earth for cell biologist

 :: Posted by American Biotechnologist on 08-06-2012

Just as users of Google Earth can zoom in from space to a view of their own backyard, researchers can now navigate biological tissues from a whole embryo down to its subcellular structures thanks to recent advances in electron microscopy and image processing, as described in The Journal of Cell Biology (JCB). An upgrade to the JCB DataViewer (http://jcb-dataviewer.rupress.org), JCB’s browser-based image presentation tool, now also makes these data publicly accessible for exploration and discovery.

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A Simple Way to Study Cells

 :: Posted by American Biotechnologist on 02-08-2012

Remember MacGyver? He could do almost anything with a piece of scotch tape and a paper clip. The following story reminds me very much of McGyver and how much can be accomplished with a little imagination.

National Institute of Standards and Technology (NIST) research engineer Javier Atencia has a reputation for creating novel microfluidic devices out of ordinary, inexpensive components. This time, he has combined a glass slide, plastic sheets and double-sided tape into a “diffusion-based gradient generator”—a tool to rapidly assess how changing concentrations of specific chemicals affect living cells.

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New technique for watching proteins in action in intact cells

 :: Posted by American Biotechnologist on 11-01-2011

Proteins are literally the movers and the shakers of the intracellular world. If DNA is the film director, then they are the actors. And much can be learned about cell function – and dysfunction – by watching proteins on the move.

Until now, scientists have only been able to see this process indirectly. Now researchers at Vanderbilt University in Nashville, Tenn., have come up with a promising new technique that uses a scanning transmission electron microscope (STEM) to view proteins tagged with gold nanoparticles in whole, intact cells.
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Targeting Suppression of B-Cell Lymphoma Proliferation

 :: Posted by American Biotechnologist on 09-21-2011

Dr John J Rossi’s titles and accolades are many and varied — and well earned. In his current affiliation with the City of Hope Comprehensive Cancer Center, Rossi serves as chair and professor of molecular and cellular biology, dean of the graduate school of biological sciences, and associate director for laboratory research. He is co-leader of the cancer biology program and the first holder of the Lidow Family Research Chair. These professional accomplishments are complemented by numerous awards, including a 2002 Merit Award in the Division of AIDS, National Institute of Allergy and Infectious Diseases. The common thread that weaves all of these activities and achievements together continues to be an unabashed enthusiasm for and curiosity toward scientific discovery — specifically in the molecular genetics of disease.

Rossi received his doctoral degree in microbial genetics in the late 1970s. At the time, cloning was only just becoming a tool that researchers could use, and with Rossi’s exposure to this now basic technique, his fascination with genetics turned to the molecular aspects of the discipline. Rossi was drawn to postdoctoral studies in Dr Arthur Landy’s lab at Brown University because of Landy’s groundbreaking work in sequencing genetic information for the bacteriophage lambda. Landy’s work focused on trying to understand some of the sequences of the attachment site of the bacteriophage in its host chromosome. He also completed the first restriction map of any lambda phage. Rossi was particularly attracted by the technology he would have access to in this forward-thinking environment.

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