Planta Med 2013; 79(01): 27-29
DOI: 10.1055/s-0032-1327925
Biological and Pharmacological Activity
Letters
Georg Thieme Verlag KG Stuttgart · New York

Topoisomerase I Inhibitor Evodiamine Acts As an Antibacterial Agent against Drug-Resistant Klebsiella pneumoniae

Jui-Yu Wu*
1   College of Medicine, Taipei Medical University, Taipei, Taiwan
,
Ming-Chih Chang*
2   Department of Dentistry, Cathay General Hospital, Taipei, Taiwan
,
Chien-Shu Chen
3   School of Pharmacy, China Medical University, Taichung, Taiwan
,
Hsiu-Chen Lin
4   Department of Laboratory Medicine, Taipei Medical University Hospital, Taipei, Taiwan
5   Department of Pediatrics, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
,
Hsiang-Ping Tsai
1   College of Medicine, Taipei Medical University, Taipei, Taiwan
,
Chien-Chun Yang
1   College of Medicine, Taipei Medical University, Taipei, Taiwan
,
Che-Hsiung Yang
1   College of Medicine, Taipei Medical University, Taipei, Taiwan
,
Chun-Mao Lin
1   College of Medicine, Taipei Medical University, Taipei, Taiwan
6   Orthopedics Research Center, Taipei Medical University Hospital, Taipei, Taiwan
› Author Affiliations
Further Information

Publication History

received 14 June 2012
revised 04 October 2012

accepted 18 October 2012

Publication Date:
16 November 2012 (online)

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Abstract

Topoisomerase inhibitors have been developed in a variety of clinical applications. We investigated the inhibitory effect of evodiamine on E. coli topoisomerase I, which may lead to an anti-bacterial effect. Evodiamine inhibits the supercoiled plasmid DNA relaxation that is catalyzed by E. coli topoisomerase I, and computer-aided docking has shown that the Arg161 and Asp551 residues of topoisomerase I interact with evodiamine. We investigated the bactericidal effect of evodiamine against multidrug-resistant Klebsiella pneumoniae. Evodiamine showed a significantly lower minimal inhibitory concentration value (MIC 128 µg/mL) compared with antibiotics (> 512 µg/mL) against the clinical isolate of K. pneumoniae. The results suggested that evodiamine is a potential agent against drug-resistant bacteria.

* These authors contributed equally to this work.