TY - JOUR
T1 - The role of hydrogen peroxide in environmental adaptation of oral microbial communities
AU - Zhu, Lin
AU - Kreth, Jens
PY - 2012
Y1 - 2012
N2 - Oral streptococci are able to produce growth-inhibiting amounts of hydrogen peroxide (H 2O 2) as byproduct of aerobic metabolism. Several recent studies showed that the produced H 2O 2 is not a simple byproduct of metabolism but functions in several aspects of oral bacterial biofilm ecology. First, the release of DNA from cells is closely associated to the production of H 2O 2 in Streptococcus sanguinis and Streptococcus gordonii. Extracellular DNA is crucial for biofilm development and stabilization and can also serve as source for horizontal gene transfer between oral streptococci. Second, due to the growth inhibiting nature of H 2O 2, H 2O 2 compatible species associate with the producers. H2O2 production therefore might help in structuring the initial biofilm development. On the other hand, the oral environment harbors salivary peroxidases that are potent in H 2O 2 scavenging. Therefore, the effects of biofilm intrinsic H 2O 2 production might be locally confined. However, taking into account that 80 of initial oral biofilm constituents are streptococci, the influence of H 2O 2 on biofilm development and environmental adaptation might be under appreciated in current research.
AB - Oral streptococci are able to produce growth-inhibiting amounts of hydrogen peroxide (H 2O 2) as byproduct of aerobic metabolism. Several recent studies showed that the produced H 2O 2 is not a simple byproduct of metabolism but functions in several aspects of oral bacterial biofilm ecology. First, the release of DNA from cells is closely associated to the production of H 2O 2 in Streptococcus sanguinis and Streptococcus gordonii. Extracellular DNA is crucial for biofilm development and stabilization and can also serve as source for horizontal gene transfer between oral streptococci. Second, due to the growth inhibiting nature of H 2O 2, H 2O 2 compatible species associate with the producers. H2O2 production therefore might help in structuring the initial biofilm development. On the other hand, the oral environment harbors salivary peroxidases that are potent in H 2O 2 scavenging. Therefore, the effects of biofilm intrinsic H 2O 2 production might be locally confined. However, taking into account that 80 of initial oral biofilm constituents are streptococci, the influence of H 2O 2 on biofilm development and environmental adaptation might be under appreciated in current research.
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U2 - 10.1155/2012/717843
DO - 10.1155/2012/717843
M3 - Review article
C2 - 22848782
AN - SCOPUS:84864916096
SN - 1942-0900
JO - Oxidative medicine and cellular longevity
JF - Oxidative medicine and cellular longevity
M1 - 717843
ER -