Itaconimides as novel quorum sensing inhibitors of Pseudomonas aeruginosa
Pseudomonas aeruginosa is known as an opportunistic pathogen that often causes persistent infections associated with high level of antibiotic-resistance and biofilms formation. Chemical interference with bacterial cell-to-cell communication, termed quorum sensing (QS), has been recognized as an attr...
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sg-ntu-dr.10356-971452020-09-21T11:31:41Z Itaconimides as novel quorum sensing inhibitors of Pseudomonas aeruginosa Fong, July Mortensen, Kim T. Nørskov, Amalie Qvortrup, Katrine Yang, Liang Tan, Choon Hong Givskov, Michael Nielsen, Thomas Eiland School of Physical and Mathematical Sciences Singapore Centre for Environmental Life Sciences and Engineering DRNTU::Science::Chemistry Quorum Sensing Biofilm Pseudomonas aeruginosa is known as an opportunistic pathogen that often causes persistent infections associated with high level of antibiotic-resistance and biofilms formation. Chemical interference with bacterial cell-to-cell communication, termed quorum sensing (QS), has been recognized as an attractive approach to control infections and address the drug resistance problems currently observed worldwide. Instead of imposing direct selective pressure on bacterial growth, the right bioactive compounds can preferentially block QS-based communication and attenuate cascades of bacterial gene expression and production of virulence factors, thus leading to reduced pathogenicity. Herein, we report on the potential of itaconimides as quorum sensing inhibitors (QSI) of P. aeruginosa. An initial hit was discovered in a screening program of an in-house compound collection, and subsequent structure-activity relationship (SAR) studies provided analogs that could reduce expression of central QS-regulated virulence factors (elastase, rhamnolipid, and pyocyanin), and also successfully lead to the eradication of P. aeruginosa biofilms in combination with tobramycin. Further studies on the cytotoxicity of compounds using murine macrophages indicated no toxicity at common working concentrations, thereby pointing to the potential of these small molecules as promising entities for antimicrobial drug development. NRF (Natl Research Foundation, S’pore) MOE (Min. of Education, S’pore) Published version 2019-06-04T05:41:49Z 2019-12-06T19:39:23Z 2019-06-04T05:41:49Z 2019-12-06T19:39:23Z 2019 Journal Article Fong, J., Mortensen, K. T., Nørskov, A., Qvortrup, K., Yang, L., Tan, C. H., . . . Givskov, M. (2019). Itaconimides as novel quorum sensing inhibitors of Pseudomonas aeruginosa. Frontiers in Cellular and Infection Microbiology, 8, 443-. doi:10.3389/fcimb.2018.00443 https://hdl.handle.net/10356/97145 http://hdl.handle.net/10220/48527 10.3389/fcimb.2018.00443 en Frontiers in Cellular and Infection Microbiology © 2019 Fong, Mortensen, Nørskov, Qvortrup, Yang, Tan, Nielsen and Givskov. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms. 11 p. application/pdf |
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DRNTU::Science::Chemistry Quorum Sensing Biofilm Fong, July Mortensen, Kim T. Nørskov, Amalie Qvortrup, Katrine Yang, Liang Tan, Choon Hong Givskov, Michael Nielsen, Thomas Eiland Itaconimides as novel quorum sensing inhibitors of Pseudomonas aeruginosa |
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Pseudomonas aeruginosa is known as an opportunistic pathogen that often causes persistent infections associated with high level of antibiotic-resistance and biofilms formation. Chemical interference with bacterial cell-to-cell communication, termed quorum sensing (QS), has been recognized as an attractive approach to control infections and address the drug resistance problems currently observed worldwide. Instead of imposing direct selective pressure on bacterial growth, the right bioactive compounds can preferentially block QS-based communication and attenuate cascades of bacterial gene expression and production of virulence factors, thus leading to reduced pathogenicity. Herein, we report on the potential of itaconimides as quorum sensing inhibitors (QSI) of P. aeruginosa. An initial hit was discovered in a screening program of an in-house compound collection, and subsequent structure-activity relationship (SAR) studies provided analogs that could reduce expression of central QS-regulated virulence factors (elastase, rhamnolipid, and pyocyanin), and also successfully lead to the eradication of P. aeruginosa biofilms in combination with tobramycin. Further studies on the cytotoxicity of compounds using murine macrophages indicated no toxicity at common working concentrations, thereby pointing to the potential of these small molecules as promising entities for antimicrobial drug development. |
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School of Physical and Mathematical Sciences |
author_facet |
School of Physical and Mathematical Sciences Fong, July Mortensen, Kim T. Nørskov, Amalie Qvortrup, Katrine Yang, Liang Tan, Choon Hong Givskov, Michael Nielsen, Thomas Eiland |
format |
Article |
author |
Fong, July Mortensen, Kim T. Nørskov, Amalie Qvortrup, Katrine Yang, Liang Tan, Choon Hong Givskov, Michael Nielsen, Thomas Eiland |
author_sort |
Fong, July |
title |
Itaconimides as novel quorum sensing inhibitors of Pseudomonas aeruginosa |
title_short |
Itaconimides as novel quorum sensing inhibitors of Pseudomonas aeruginosa |
title_full |
Itaconimides as novel quorum sensing inhibitors of Pseudomonas aeruginosa |
title_fullStr |
Itaconimides as novel quorum sensing inhibitors of Pseudomonas aeruginosa |
title_full_unstemmed |
Itaconimides as novel quorum sensing inhibitors of Pseudomonas aeruginosa |
title_sort |
itaconimides as novel quorum sensing inhibitors of pseudomonas aeruginosa |
publishDate |
2019 |
url |
https://hdl.handle.net/10356/97145 http://hdl.handle.net/10220/48527 |
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1681056070455263232 |