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Cutting-edge bacteria research leads to more effective treatment of complex infections
Date:5/14/2013

Bacteria are life forms, which, like all other life forms, struggle for the best living conditions for themselves. Therefore they will try to avoid getting attacked by the human immune system, and therefore they have developed various ways to protect themselves from the human immune system. When safe from the immune system, they can focus on breeding and multiplying, and if they become numerous enough, the human body will experience their presence as an infection. Some bacteria are relatively harmless, while others are fatal. The bacteria avoid being attacked by the human immune system by forming a biofilm - a surface to protect them against the immune system.

"The biofilm contributes to bacterial resistance, and that can cause severe, persistent infections around heart valve implants and in lungs and the urinary tract," explains postdoc. Mikkel Girke Jrgensen from the Department of Biochemistry and Molecular Biology at the University of Southern Denmark. Together with professor Poul Valentin-Hansen from the same institution and scientists from American Eunice Kennedy Shriver National Institute of Child Health and Human Development, Bethesda, and Georgetown University Medical Center, Washington DC, he stands behind the new discovery.

The researchers now understand the underlying regulatory mechanisms behind the formation of biofilms. The mechanism involves small RNA molecules, which can affect bacterial gene expression and thus the decision of whether to form biofilm or not.

Bacteria can move by using their so-called flagella to swim with. When they need to form biofilms, they "turn off" the flagella, stop moving and start to form a biofilm.

"We have now established what decides whether they swim or not - and that determines whether they form biofilms or not," explains Mikkel Girke Jrgensen and continues:

"Prospects for the pharmaceutical industry are huge. This increased understanding of biofilm formation may be the fir
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Contact: Birgitte Svennevig
birs@sdu.dk
45-65-50-29-30
University of Southern Denmark
Source:Eurekalert

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