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A new spin on drug delivery
Date:7/9/2010

Blacksburg, Va., July 12, 2010 Chang Lu and his chemical engineering research group at Virginia Tech have discovered how to "greatly enhance" the delivery of DNA payloads into cells. The description of their work will be featured on the cover of Lab on a Chip (issue 16), the premier journal for researchers in microfluidics. http://www.rsc.org/Publishing/Journals/LC/article.asp?doi=c004472e

The work also appears in the July 8 issue of Nature magazine (Vol. 466, p. 163) http://www.nature.com/nature/journal/v466/n7303/pdf/466163d.pdf

Lu's ultimate goal is to apply this technique to create genetically modified cells for cancer immunotherapy, stem cell therapy and tissue regeneration.

One of the most widely used physical methods to deliver genes into cells "is incredibly inefficient because only a small fraction of a cell's total membrane surface can be permeated," said Lu, an associate professor of chemical engineering at Virginia Tech. http://www.microfluidics.che.vt.edu/

The method Lu is referring to is called electroporation, a phenomenon known for decades that increases the permeability of a cell by applying an electric field to generate tiny pores in the membrane of cells.

Lu called the process "a new spin on DNA delivery." He explained the process saying, "Conventional electroporation methods deliver DNA only within a very small portion of the cell surface, determined by the physics governing the interaction between an electric field and a cell. Our method enables uniform DNA delivery over the entire cell surface, which is the first time we are aware that this has been demonstrated. The result is a greatly enhanced transfer of the genetic material."

Lu said his new approach harnes
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Contact: Lynn Nystrom
tansy@vt.edu
540-231-4371
Virginia Tech
Source:Eurekalert  

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