ArticleProceedings of the National Academy of Sciences of the United States of America2008
Endogenous oxidative stress produces diversity and adaptability in biofilm communities.
Article in Proceedings of the National Academy of Sciences of the United States of America, 2008. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 157 papers.
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157 citing papers in PubMed, 341 citations in OpenAlex.
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97 more citing papers are in PubMed but not listed here.
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Authors and funding
2 authors at 2 institutions in 1 country.
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No grant is acknowledged in the PubMed record.
Abstract
Many bacterial species are capable of biofilm growth, in which cells live and replicate within multicellular community groups. Recent work shows that biofilm growth by a wide variety of bacterial species can generate genetic diversity in microbial populations. This finding is significant because the presence of diverse subpopulations can extend the range of conditions in which communities can thrive. Here, we used biofilms formed by the pathogen Pseudomonas aeruginosa to investigate how this population diversity is produced. We found that some cells within biofilms incur double-stranded DNA breaks caused by endogenous oxidative stress. Genetic variants then result when breaks are repaired by a mutagenic mechanism involving recombinatorial DNA repair genes. We hypothesized that the mutations produced could promote the adaptation of biofilm communities to changing conditions in addition to generating diversity. To test this idea, we exposed biofilms to an antibiotic and found that the oxidative stress-break repair mechanism increased the emergence of antibiotic-resistant bacteria. The diversity and adaptability produced by this mechanism could help biofilm communities survive in harsh environments.
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