生物膜被破坏会引发慢性感染

A clever new imaging technique discovered at the University of California, Berkeley, reveals a possible plan of attack for many bacterial¹ diseases, such as cholera²（霍乱） , lung infections in cystic fibrosis（包囊性纤维症） patients and even chronic³ sinusitis, that form biofilms that make them resistant⁴ to antibiotics⁵. By devising a new fluorescent⁶ labeling strategy and employing super-resolution light microscopy, the researchers were able to examine the structure of sticky plaques⁷ called bacterial biofilms that make these infections so tenacious⁸. They also identified genetic⁹ targets for potential drugs that could break up the bacterial community and expose the bugs¹⁰ to the killing¹¹ power of antibiotics.

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"Eventually, we want to make these bugs homeless," said lead researcher Veysel Berk, a postdoctoral fellow in the Department of Physics and the California Institute for Quantitative¹² Biosciences (QB3) at UC Berkeley. #

Berk and his co-authors, including Nobel laureate and former UC Berkeley professor Steven Chu, report their findings in the July 13 issue of the journal Science. #

"In their natural habitat, 99.9 percent of all bacteria live as a community and attach to surfaces as biofilms; according to the National Institutes of Health, 80 percent of all infections in humans are related to biofilms," Berk said. #

The researchers were able to employ new techniques that allowed them to zoom¹³ into a street-level view of these biofilms, where they learned "how they grow from a single cell and come together to form rooms and whole buildings," Berk said. "Now, we can come up with a logical approach to discovering how to take down their building, or prevent them from forming the building itself." #

Combining super-resolution microscopy with the technique Berk developed, which allows continuous labeling of growing and dividing cells in culture, biologists in many fields will be able to record stop-motion video of "how bacteria build their castles," he said.

"This work has led to new insights into the development of these complex structures and will no doubt pave the way to new approaches to fighting infectious disease and also bacteriological applications in environmental and industrial settings," said Chu, a former UC Berkeley professor of physics and of molecular¹⁴ and cell biology and former director of the Lawrence Berkeley National Laboratory.#p#分页标题#e# #