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Antibacterial Effect of Carbon Nanotube Containing Chemical Compounds on Drug-Resistant Isolates of Acinetobacter Baumannii



Banihashemi K1 ; Amirmozafari N2 ; Mehregan I1 ; Bakhtiari R3 ; Sobouti B4
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Authors Affiliations
  1. 1. Department of Biology, Science and Research Branch, Islamic Azad University, Tehran, Iran
  2. 2. Department of Microbiology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
  3. 3. Department of Pathobiology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
  4. 4. Burn Research Center, Shahid Motahari Burn Hospital, Iran University of Medical Sciences, Tehran, Iran

Source: Iranian Journal of Microbiology Published:2021

Abstract

Background and Objectives: Acinetobacter baumannii is recognized as an important pathogen responsible for serious infections causing episodes of hospital infection. Carbon nanotubes (CNTs) have recently emerged as superior materials against antibiotic-resistant bacteria. In this study, a new chemical compound was designed in order to combat A. baumannii infections. Subsequently, the effect of this novel carbon nanotube coated with an antibacterial compound on Extensively Drug-Resistant (XDR), Multidrug-Resistant (MDR) and Pan-Drug-Resistance (PDR) strains of A. baumannii was investi-gated. Materials and Methods: A total of 122 clinical isolates of A. baumannii were cultured from burn patients and their susceptibility to antibiotics were checked using disk diffusion method and Minimum inhibitory concentration. Antimicrobial effects of the coated carbon nanotube were evaluated on XDR, MDR and PDR isolates of A. baumannii. Cell viability was determined using tetrazolium reduction assay (MTT) on human fibroblast cell line (HDFa). Wound healing processes were assessed by quantitative polymerase chain reaction. Results: Of the 50 A. baumannii isolates, 38 (76%) were found to be MDR and 12 (24%) were XDR. No PDR strains were detected. Results indicated that the carbon nanotube combined with mercury had antibacterial effect against different A. bau-mannii species and it also was able to increase the expression of epidermal growth factor, platelet-derived growth factor and vascular endothelial growth factor A mRNA levels which are involved in wound healing. Conclusion: The engineered carbon nanotube compound can potentially be used for treatment of burn related infections. This can potentially give clinicians a new tool for treating A. baumannii infections. © 2021 The Authors. Published by Tehran University of Medical Sciences.
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