Article (Scientific journals)
Novel acquired metallo-β-lactamase gene, blaSIM-1, in a class 1 integron from Acinetobacter baumannii clinical isolates from Korea
Lee, K.; Yum, J. H.; Yong, D. et al.
2005In Antimicrobial Agents and Chemotherapy, 49 (11), p. 4485-4491
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Keywords :
Acinetobacter baumannii; Korea; MBL gene; Pseudomonas aeruginosa; Adolescent; Aged; Amino Acid Sequence; Base Sequence; Carbapenems; Child; Child, Preschool; Drug Resistance, Bacterial; Female; Humans; Integrons; Male; Microbial Sensitivity Tests; Middle Aged; Molecular Sequence Data
Abstract :
[en] Carbapenem resistance mediated by acquired carbapenemase genes has been increasingly reported, particularly for clinical isolates of Pseudomonas aeruginosa and Acinetobacter spp. Of 1,234 nonduplicate isolates of carbapenem-resistant Pseudomonas spp. and Acinetobacter spp. isolated at a tertiary-care hospital in Seoul, Korea, 211 (17%) were positive for metallo-β-lactamase (MBL). Of these, 204 (96%) had either the bla IMP-1 or blaVIM-2 allele. In addition, seven Acinetobacter baumannii isolates were found to have a novel MBL gene, which was designated blaSIM-1. The SIM-1 protein has a pI of 7.2, is a new member of subclass B1, and exhibits 64 to 69% identity with the IMF-type MBLs, which are its closest relatives. All SIM-1-producing isolates exhibited relatively low imipenem and meropenem MICs (8 to 16 μg/ml) and had a multidrug resistance phenotype. Expression of the cloned blaSIM-1 gene in Escherichia coli revealed that the encoded enzyme is capable of hydrolyzing a broad array of β-lactams, including penicillins, narrow- to expanded-spectrum cephalosporins, and carbapenems. The blaSIM-1 gene was carried on a gene cassette inserted into a class 1 integron, which included three additional cassettes (arr-3, catB3, and aadA1). The strains were isolated from sputum and urine specimens from patients with pneumonia and urinary tract infections, respectively. All patients had various underlying diseases. Pulsed-field gel electrophoresis of SmaI-digested genomic DNAs showed that the strains belonged to two different clonal lineages, indicating that horizontal transfer of this gene had occurred and suggesting the possibility of further spread of resistance in the future. Copyright © 2005, American Society for Microbiology. All Rights Reserved.
Disciplines :
Microbiology
Author, co-author :
Lee, K.;  Department of Laboratory Medicine, Yonsei University College of Medicine, Seoul 120-752, South Korea, Research Institute of Bacterial Resistance, Yonsei University College of Medicine, Seoul 120-752, South Korea, Brain Korea 21 Project for Medical Sciences, Yonsei University College of Medicine, Seoul 120-752, South Korea
Yum, J. H.;  Research Institute of Bacterial Resistance, Yonsei University College of Medicine, Seoul 120-752, South Korea, Brain Korea 21 Project for Medical Sciences, Yonsei University College of Medicine, Seoul 120-752, South Korea
Yong, D.;  Department of Laboratory Medicine, Yonsei University College of Medicine, Seoul 120-752, South Korea, Research Institute of Bacterial Resistance, Yonsei University College of Medicine, Seoul 120-752, South Korea, Brain Korea 21 Project for Medical Sciences, Yonsei University College of Medicine, Seoul 120-752, South Korea
Lee, H. M.;  Department of Laboratory Medicine, Yonsei University College of Medicine, Seoul 120-752, South Korea, Research Institute of Bacterial Resistance, Yonsei University College of Medicine, Seoul 120-752, South Korea
Kim, H. D.;  Department of Pediatrics, Yonsei University College of Medicine, Seoul 120-752, South Korea
Docquier, Jean-Denis ;  Université de Liège - ULiège > Département des sciences de la vie > Centre d'ingénierie des protéines
Rossolini, G. M.;  Department of Molecular Biology, Microbiology Section, University of Siena, Siena I-53100, Italy
Chong, Y.;  Department of Laboratory Medicine, Yonsei University College of Medicine, Seoul 120-752, South Korea, Research Institute of Bacterial Resistance, Yonsei University College of Medicine, Seoul 120-752, South Korea, Department of Laboratory Medicine, Yonsei University College of Medicine, 134 Shinchondong, Seodaemunku, Seoul 120-752, South Korea
Language :
English
Title :
Novel acquired metallo-β-lactamase gene, blaSIM-1, in a class 1 integron from Acinetobacter baumannii clinical isolates from Korea
Publication date :
2005
Journal title :
Antimicrobial Agents and Chemotherapy
ISSN :
0066-4804
eISSN :
1098-6596
Publisher :
American Society for Microbiology, Washington, United States - District of Columbia
Volume :
49
Issue :
11
Pages :
4485-4491
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 23 November 2020

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