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Poster communications

The natriuretic peptide hormones prevent Pseudomonas aeruginosa biofilm formation through a specific bacterial target

Abstract : We have shown that the C-type Natriuretic Peptide (CNP), a peptide produced in the lung, reduces Pseudomonas aeruginosa biofilm formation. Herein, we clarified the effect of CNP and studied the effect of two other members of the natriuretic peptide family, the atrial natriuretic peptide (ANP) and the brain natriuretic peptide (BNP) on P. aeruginosa biofilm. We observed that exposure of P. aeruginosa to graded concentrations of ANP, CNP or BNP (10-9 to 10-6 M) induced a dose-related inhibition of biofilm formation under dynamic conditions. In parallel, we showed that static biofilms formed by P. aeruginosa are impacted by BNP and CNP but more modestly as compared with the dynamic conditions. An in silico study comparing protein sequences of human natriuretic peptide receptors and Pseudomonas proteins revealed that the bacterial protein AmiC could be the sensor for natriuretic peptides. Using MicroScaleThermophoresis, we showed that both CNP and ANP bind AmiC with a K D of 2 µM, whereas BNP has no affinity for AmiC. Interestingly, an amiC mutant strain was not impaired in biofilm formation in the presence of CNP at 10-7 M or less, while it remained sensitive to BNP. We demonstrate that the natriuretic peptides strongly prevent biofilm formation through different mechanisms. Indeed, we showed that CNP and ANP which are the more expressed peptides in the lung act specifically through the AmiC sensor, whereas the BNP peptide seems to possess a non specific activity. This discrepancy should have major consequences to design drugs for biofilm treatment.
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https://hal-normandie-univ.archives-ouvertes.fr/hal-01969436
Contributor : Olivier Lesouhaitier <>
Submitted on : Wednesday, January 16, 2019 - 10:47:12 PM
Last modification on : Tuesday, June 23, 2020 - 3:40:22 AM

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  • HAL Id : hal-01969436, version 1

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F. Desriac, T. Clamens, T. Rosay, Jérémy Enault, Lucille Roquigny, et al.. The natriuretic peptide hormones prevent Pseudomonas aeruginosa biofilm formation through a specific bacterial target. 16th international conference on Pseudomonas,, Sep 2017, Liverpool, United Kingdom. ⟨hal-01969436⟩

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