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NanoFactories: Side Effects NOT Included

March 21st, 2007 Josh Umbehr Medicine


Ok, so this is about as science fiction as it gets. Researchers at the University of Maryland have created “nanofactories” capable of magnetically docking with target cells and creating pharmaceuticals [de novo!] to render the cell inactive.

The list of side effects on your prescription bottle may one day be a lot shorter, according to researchers at the University of Maryland’s A. James Clark School of Engineering.
That’s because instead of taking a conventional medication, you may swallow tiny “nanofactories,” biochemical machines that act like cells, first conceived of at the Clark School.
For example, these ingested nanofactories, using magnetism, could detect a bacterial infection, produce a medication using the body’s own materials, and deliver a dose directly to the bacteria. The drug would do its work only at the infection site, and thus not cause the side effects that may arise when an antibiotic travels throughout the body in search of infections.
Nanofactory.jpg
William Bentley, professor and chair of the Fischell Department of Bioengineering at the Clark School, and several graduate students including Rohan Fernandes, have developed this “magnetic nanofactory” concept and published their research in Metabolic Engineering in December of last year. Colleagues around the country voiced their support for the technology in Nature Nanotechnology last month.
“In the lab,” Bentley says, “our group showed we can produce a tiny nanofactory and attach it to a target cell magnetically. The nanofactory then makes small molecules from surrounding materials and delivers the molecules–potentially drug molecules–to the targeted cell.”
Besides drug molecules, the researchers showed that the nanofactory could produce signaling molecules that communicate with the target cell or block the target cell from communicating with other, similar cells (a process called “quorum sensing”) and thus prevent infection. The researchers attached the nanofactories to E. coli cells, targeting them with the help of a mixture of iron particles and chitosan, a substance derived from the shells of crustaceans like crabs and shrimp. The nanofactories then produced a signaling molecule that could render the E. coli harmless. Nanofactories could be designed to produce the needed drug molecules over an extended period of time.
Now that the viability of nanofactories has been shown, researchers must overcome a few challenges before they can be used in humans. First, nanofactories must be cloaked so that the body does not react to them as a foreign substance and try to attack them. Another goal is to find a method to shut down the nanofactory once it has produced the needed substance–a type of off-switch that could be activated from outside the body. These and other topics are being investigated in the Fischell Department of Bioengineering.

We can’t wait for the first time we write a prescription for “nanofactories.”
Press Release . . .

Josh Umbehr

Josh Umbehr, MD founded AtlasMD Concierge Family Practice, one of the fastest growing insurance-free practices in the country. Currently developing an industry leading platform for direct primary care physicians: Atlas EMR Software for Concierge Medicine.

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