Role of the AdeABC efflux pump in carbapenems resistance of clinical isolates of Acinetobacter baumannii / 南方医科大学学报
Journal of Southern Medical University
;
(12): 1378-1381, 2011.
Article
in Chinese
| WPRIM
| ID: wpr-235119
ABSTRACT
<p><b>OBJECTIVE</b>To investigate the role of AdeABC efflux pump in carbapenems resistance of Acinetobacter baumannii in light of the phenotype and genetype of the efflux pump.</p><p><b>METHODS</b>The phenotype of the efflux pump was detected in 138 clinical isolates of A.baumannii using the efflux pump inhibitor carbonyl cyanide 3-chlorophenylhydrazone (CCCP). The mRNA expression of pump-encoding gene adeB in the strains was detected using quantitative real-time RT-PCR.</p><p><b>RESULTS</b>Of the 138 strains, 28 showed positivities for AdeABC efflux pump identified by Mueller-Hinton Broth with CCCP. Of the 39 strains resistant to meropenem, 15 (38.4%) showed positive results in CCCP assay, a rate significantly higher than that among the 99 sensitive strains (13.1%, 13/99) (X(2)=12.477(b), P=0.01). The mRNA expression of efflux pump-encoding gene adeB was detected by real-time RT-PCR at a level of 0.899∓∓1.172 in meropenem-sensitive strains, significantly lower than the level of 21.101∓∓21.443 in meropenem-resistant strains (t=4.403, P=0.000).</p><p><b>CONCLUSIONS</b>Efflux plays a role in carbapenems resistance in the clinical isolates of A. baumannii. The AdeABC efflux pump may be an important factor in reducing carbapenems sensitivity in A. baumannii.</p>
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Membrane Transport Proteins
/
Pharmacology
/
Bacterial Proteins
/
Carbapenems
/
Beta-Lactam Resistance
/
Acinetobacter baumannii
/
Genetics
/
Metabolism
Type of study:
Prognostic study
Limits:
Humans
Language:
Chinese
Journal:
Journal of Southern Medical University
Year:
2011
Type:
Article
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