Title of article :
Antibacterial activity of amino- and amido- terminated poly (amidoamine)-G6 dendrimer on isolated bacteria from clinical specimens and standard strains
Author/Authors :
Rastegar, Ayoob Department of Environmental Health Engineering - School of Public Health - Sabzevar University of Medical Sciences, Sabzevar, Iran , Nazari, Shahram Student Research committee - Faculty of Public Health Branch - Iran University of Medical Sciences, Tehran, Iran , Allahabadi, Ahmad Department of Environmental Health Engineering - School of Public Health - Sabzevar University of Medical Sciences, Sabzevar, Iran , Falanji, Farahnaz Cellular and Molecular Research Center - Sabzevar University of Medical Sciences, Sabzevar, Iran , Akbari Dourbash, Fakhreddin Department of Materials science and Engineering - Tarbiat Modares University, Tehran, Iran , Rezai, Zahra Department of Environmental Health Engineering - School of Public Health - Sabzevar University of Medical Sciences, Sabzevar, Iran , Alizadeh Matboo, Soudabeh School of Public Health - Ardabil University of Medical Sciences, Ardabil, Iran , Hekmat-Shoar, Reza Department of Occupational Health Engineering - School of Public Health - Sabzevar University of Medical Sciences, Sabzevar, Iran , Mohseni, Mohsen Department of Environmental Health Engineering - School of Public Health - Shahid Beheshti University of Medical Sciences, Tehran, Iran , Majidi, Gharib Research Center for Environmental Pollutants - Qom University of Medical Sciences, Qom, Iran
Abstract :
Background: Nanoscale poly (amidoamine) dendrimers have been investigated for their biological demands, but their antibacterial
activity has not been widely discovered. Thus, the sixth generation of poly (amidoamine) dendrimer (PAMAM-G6) was synthesized
and its antibacterial activities were evaluated on Gram-negative bacteria; P. aeruginosa, E. coli, A. baumannii, S. typhimurium, S. dysenteriae,
K. pneumoniae, P. mirabilis, and Gram-positive bacteria, and S.aureus and B. subtilis, which were isolated from different
clinical specimens and standard strains of these bacteria.
Methods: In this study, 980 specimens including urine (47%), blood (27%), sputum (13%), wounds (8%), and burns (5%) were
collected from clinical specimens of 16 hospitals and clinics in city of Sabzevar, Iran. Then, the target bacteria were isolated and identified
using standard methods. Minimum inhibitory concentration and minimum bactericidal concentrations against Gram-positive and
Gram-negative bacteria were determined according to guidelines described by clinical and laboratory standards institute (CLSI).
Standard discs were prepared using 0.025, 0.25, 2.5, and 25 μg/mL concentrations of PAMAM-G6 on Mueller-Hinton agar plates to
determinate the zone of inhibition. The cytotoxicity of PAMAM-G6 dendrimer was evaluated in HCT116 cells by MTT assay.
Results: The most important isolated bacteria were E. coli (23.65%), S. aureus (24.7%), P. aeruginosa (10.49%), B. subtilis (7.7%),
S. typhimurium (8.87%), A. baumannii (7.02%), K. pneumoniae (7.1%), P. mirabilis (6.46%), and S. dysenteriae (3.6%). Moreover, it
was found that poly (amidoamine)–G6 exhibited more antibacterial efficacy on standard strains than isolated bacteria from clinical
samples (p<0.05). The cytotoxicity of PAMAM-G6 to the cells showed that cytotoxicity depended on the concentration level and exposure
time.
Conclusion: The PAMAM-G6 dendrimer showed a positive impact on the removal of dominant bacterial isolated from clinical specimens
and standard strains.
Keywords :
Synthesis , Novel antibacterial , Nosocomial pathogens , Health care-associated infections , Poly (amidoamine)-G6 , Cytotoxicity , Antimicrobial resistance
Journal title :
Astroparticle Physics
