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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Appl+Environ+Microbiol
2015 ; 81
(7
): 2328-38
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Anthranilate deteriorates the structure of Pseudomonas aeruginosa biofilms and
antagonizes the biofilm-enhancing indole effect
#MMPMID25616795
Kim SK
; Park HY
; Lee JH
Appl Environ Microbiol
2015[Apr]; 81
(7
): 2328-38
PMID25616795
show ga
Anthranilate and indole are alternative degradation products of tryptophan,
depending on the bacterial species. While indole enhances the biofilm formation
of Pseudomonas aeruginosa, we found that anthranilate, the tryptophan degradation
product of P. aeruginosa, had an opposite effect on P. aeruginosa biofilm
formation, in which anthranilate deteriorated the mushroom structure of biofilm.
The anthranilate effect on biofilm formation was differentially exerted depending
on the developmental stage and the presence of shear force. Anthranilate slightly
accelerated the initial attachment of P. aeruginosa at the early stage of biofilm
development and appeared to build more biofilm without shear force. But
anthranilate weakened the biofilm structure in the late stage, deteriorating the
mushroom structure of biofilms with shear force to make a flat biofilm. To
investigate the interplay of anthranilate with indole in biofilm formation,
biofilms were cotreated with anthranilate and indole, and the results showed that
anthranilate antagonized the biofilm-enhancing effect of indole. Anthranilate was
able to deteriorate the preformed biofilm. The effect of anthranilate and indole
on biofilm formation was quorum sensing independent. AntR, a regulator of
anthranilate-degrading metabolism was synergistically activated by cotreatment
with anthranilate and indole, suggesting that indole might enhance biofilm
formation by facilitating the degradation of anthranilate. Anthranilate slightly
but significantly affected the cyclic diguaniylate (c-di-GMP) level and
transcription of major extracellular polysaccharide (Psl, Pel, and alginate)
operons. These results suggest that anthranilate may be a promising antibiofilm
agent and antagonize the effect of indole on P. aeruginosa biofilm formation.