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Moving targets
Date:9/20/2012

PASADENA, Calif.At any given moment, millions of cells are on the move in the human body, typically on their way to aid in immune response, make repairs, or provide some other benefit to the structures around them. When the migration process goes wrong, however, the results can include tumor formation and metastatic cancer. Little has been known about how cell migration actually works, but now, with the help of some tiny worms, researchers at the California Institute of Technology (Caltech) have gained new insight into this highly complex task.

The team's findings are outlined this week online in the early edition of the Proceedings of the National Academy of Sciences (PNAS).

"In terms of cancer, we know how to find primary tumors and we know when they're metastatic, but we're missing information on the period in between when cells are crawling around, hanging out, and doing who knows what that leads to both of these types of diseases," says Paul Sternberg, Thomas Hunt Morgan Professor of Biology at Caltech, and corresponding author of the paper.

To learn more about those crawling, or migrating, cells, Sternberg looked at the animal he knows bestthe tiny Caenorhabditis elegans, a common species of roundworm that he has been studying for many years. Despite their small size, the worms actually share quite a few genes with humans.

"Migration is such a conserved process," says Mihoko Kato, a senior research fellow in biology at Caltech and a coauthor of the paper. "So whether it happens in C. elegans or in mammals, like humans, we think that many of the same genes are going to be involved."

Contained in each cellbe it human or wormare thousands of genes, all of which have a special job, or jobs, to do. Of these genes, roughly one-third are active in a given cell. To see what genes are expressed during migration, Sternberg and Kato, along with Erich Schwarz, a research fellow in Sternberg's la
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Contact: Brian Bell
bpbell@caltech.edu
626-395-5832
California Institute of Technology
Source:Eurekalert  

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