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A Drug-Repositioning Screening Identifies Pentetic Acid as a Potential Therapeutic Agent for Suppressing the Elastase-Mediated Virulence of Pseudomonas aeruginosa

 Mia Gi  ;  Junhui Jeong  ;  Keehoon Lee  ;  Kang-Mu Lee  ;  Masanori Toyofuku  ;  Dong Eun Yong  ;  Sang Sun Yoon  ;  Jae Young Choi 
 Antimicrobial Agents and Chemotherapy, Vol.58(12) : 7205-7214, 2014 
Journal Title
 Antimicrobial Agents and Chemotherapy 
Issue Date
Pseudomonas aeruginosa, a Gram-negative bacterium of clinical significance, produces elastase as a predominant exoprotease. Here, we screened a library of chemical compounds currently used for human medication and identified diethylene triamine penta-acetic acid (DTPA, pentetic acid) as an agent that suppresses the production of elastase. Elastase activity found in the prototype P. aeruginosa strain PAO1 was significantly decreased when grown with a concentration as low as 20 μM DTPA. Supplementation with Zn2+ or Mn2+ ions restored the suppressive effect of DTPA, suggesting that the DTPA-mediated decrease in elastase activity is associated with ion-chelating activity. In DTPA-treated PAO1 cells, transcription of the elastase-encoding lasB gene and levels of the Pseudomonas quinolone signal (PQS), a molecule that mediates P. aeruginosa quorum sensing (QS), were significantly downregulated, reflecting the potential involvement of the PQS QS system in DTPA-mediated elastase suppression. Biofilm formation was also decreased by DTPA treatment. When A549 alveolar type II-like adenocarcinoma cells were infected with PAO1 cells in the presence of DTPA, A549 cell viability was substantially increased. Furthermore, the intranasal delivery of DTPA to PAO1-infected mice alleviated the pathogenic effects of PAO1 cells in the animals. Together, our results revealed a novel function for a known molecule that may help treat P. aeruginosa airway infection.
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1. College of Medicine (의과대학) > Yonsei Biomedical Research Center (연세의생명연구원) > 1. Journal Papers
1. College of Medicine (의과대학) > Dept. of Microbiology (미생물학교실) > 1. Journal Papers
1. College of Medicine (의과대학) > Dept. of Laboratory Medicine (진단검사의학교실) > 1. Journal Papers
1. College of Medicine (의과대학) > Dept. of Otorhinolaryngology (이비인후과학교실) > 1. Journal Papers
Yonsei Authors
기미아(Gi, Mi A)
용동은(Yong, Dong Eun) ORCID logo https://orcid.org/0000-0002-1225-8477
윤상선(Yoon, Sang Sun)
이강무(Lee, Kang Mu) ORCID logo https://orcid.org/0000-0001-7414-5921
정준희(Jeong, Jun Hui)
최재영(Choi, Jae Young) ORCID logo https://orcid.org/0000-0001-9493-3458
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