HODA H. EL-HENDAWY, Ph.D., M., AHMED M. HASSAN, Ph.D., A., MAHMOUD, M.Sc., D. (2019). Changes in Outer Membrane Proteins of Benzalkonium Chloride Adapted Pseudomonas Aeruginosa and Mutations in GyrA and ParC Genes. test, 87(June), 1547-1555. doi: 10.21608/mjcu.2019.53574
MOHAMED E. OSMAN, Ph.D.; HODA H. EL-HENDAWY, Ph.D.; AHMED M. HASSAN, Ph.D.; AHMED M. HASSAN, Ph.D.; DINA E. MAHMOUD, M.Sc.. "Changes in Outer Membrane Proteins of Benzalkonium Chloride Adapted Pseudomonas Aeruginosa and Mutations in GyrA and ParC Genes". test, 87, June, 2019, 1547-1555. doi: 10.21608/mjcu.2019.53574
HODA H. EL-HENDAWY, Ph.D., M., AHMED M. HASSAN, Ph.D., A., MAHMOUD, M.Sc., D. (2019). 'Changes in Outer Membrane Proteins of Benzalkonium Chloride Adapted Pseudomonas Aeruginosa and Mutations in GyrA and ParC Genes', test, 87(June), pp. 1547-1555. doi: 10.21608/mjcu.2019.53574
HODA H. EL-HENDAWY, Ph.D., M., AHMED M. HASSAN, Ph.D., A., MAHMOUD, M.Sc., D. Changes in Outer Membrane Proteins of Benzalkonium Chloride Adapted Pseudomonas Aeruginosa and Mutations in GyrA and ParC Genes. test, 2019; 87(June): 1547-1555. doi: 10.21608/mjcu.2019.53574

Changes in Outer Membrane Proteins of Benzalkonium Chloride Adapted Pseudomonas Aeruginosa and Mutations in GyrA and ParC Genes

The Medical Journal of Cairo University
Article 26, Volume 87, June, June 2019, Pages 1547-1555    PDF (703.96 K)
Document Type: Original Article
DOI: 10.21608/mjcu.2019.53574
Authors
MOHAMED E. OSMAN, Ph.D.; HODA H. EL-HENDAWY, Ph.D.; AHMED M. HASSAN, Ph.D.; AHMED M. HASSAN, Ph.D.; DINA E. MAHMOUD, M.Sc.
The Department of Botany & Microbiology, Faculty of Science, Helwan University* and National Organization for Drug Control & Research**, Egypt
Abstract
Abstract
Background: Benzalkonium Chloride (BC) is widely used in hospitals, industry and cosmetics. Adaptation of Pseu-domonas aeruginosa to BC was increased. This adaptation may lead to the emergence of cross-resistance to other disin-fectants and antibiotics. Little attention has been focused on the resistant mechanisms.
Aim of Study: Examination of mutations in the Quinolone-resistance-Determining Region (QRDR) of GyrA and ParC genes and alterations of Outer-Membrane Proteins (OMPs) in Benzalkonium Chloride (BC)-adapted Pseudomonas aeru-ginosa isolates.
Material and Methods: GyrA and ParC genes of the BC-adapted P. aeruginosa isolate and the wild-type strain ATCC 15442 were amplified by Polymerase-Chain-Reaction (PCR) and sequenced. OMPs of these isolates were also analyzed by Sodium Dodecyl Sulfate-Polyacrylamide Gel Electrophore-sis (SDS-PAGE) in the presence and absence of permeabilizer disodium Ethylenediamine-Tetraacetate (EDTA) to investigate the variations.
Results: The results manifested a single mutation in both GyrA (Thr-83-Ile) and ParC (Ser-87-Leu). In SDS-PAGE, one band with molecular weight of 52.23kDa was detected in all samples. Seven bands with molecular weights of 71.44, 38.48, 36.01, 33.03, 26.17, 21.14 and 6.35kDa were stable in both ATCC 15442 and treated isolate. Also, seven bands with molecular weights of 120.83, 90.89, 79.72, 44.58, 28.91, 16.12 and 12.49kDa were newly induced in the treated isolate.
Conclusions: These results revealed that mutations in GyrA and ParC genes, and alteration of OMPs contributed to the adaptation of P. aeruginosa to BC, co-operating with efflux pump over-expression.
Keywords
Benzalkonium chloride; Pseudomonas aeruginosa; GyrA, ParC; mutations; Outer membrane proteins; SDS; PAGE
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