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Risk Factors of Clonally Related, Multi, and Extensively Drug-Resistant Acinetobacter baumannii in Severely Ill COVID-19 Patients. THE CANADIAN JOURNAL OF INFECTIOUS DISEASES & MEDICAL MICROBIOLOGY = JOURNAL CANADIEN DES MALADIES INFECTIEUSES ET DE LA MICROBIOLOGIE MEDICALE 2023; 2023:3139270. [PMID: 36814503 PMCID: PMC9940951 DOI: 10.1155/2023/3139270] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Revised: 10/30/2022] [Accepted: 02/06/2023] [Indexed: 02/15/2023]
Abstract
Background The secondary infection of multi and extensively drug-resistant "Acinetobacter baumannii" in severely ill COVID-19 individuals is usually associated with extended hospitalisation and a high mortality rate. The current study aimed to assess the exact incidence rate of A. baumannii coinfection in severely ill COVID-19 patients admitted to intensive care unit (ICUs), to identify the possible mechanism of A. baumannii transfer to COVID-19 patients and to find out their resistance rate against different antibiotics. Methods Fifty severely ill "COVID-19" individuals on respiratory support were selected with samples being collected from the pharynx. In addition, another 60 samples were collected from the surrounding environment. Bacterial isolates were diagnosed by microbiological cultures and confirmed by "Vitek 2 system" and real-time PCR. The "Vitek 2 Compact system" was used to evaluate these isolates for antimicrobial susceptibility. The recovered isolates' DNA fingerprints and genetic similarities were performed using ERIC-PCR. Results Twenty-six samples were tested positive for A. baumannii (20 out of 50 samples taken from patients, 40%; 6 out of 60 swabs from a nosocomial setting, 10%). All A. baumannii strains isolated from the nosocomial sites were clonally related (have the same genetic lineage) to some strains isolated from patients. However, the majority of the patients' strains were categorised as belonging to the same genetic lineage. Furthermore, "the multi and extensively drug" resistance patterns were seen in all isolates. In addition, total isolates showed resistance to the most commonly tested antibiotics, while none of them was found to be resistant to tigecycline. Conclusion Secondary "A. baumannii" infection in severely ill "COVID-19" patients is a serious matter, especially when it has one spot of transmission in the ICU as well as when it is extensively drug-resistant, necessitating an immediate and tactical response to secure the issue.
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Sarshar M, Scribano D, Palamara AT, Ambrosi C, Masotti A. The Acinetobacter baumannii model can explain the role of small non-coding RNAs as potential mediators of host-pathogen interactions. Front Mol Biosci 2022; 9:1088783. [PMID: 36619166 PMCID: PMC9810633 DOI: 10.3389/fmolb.2022.1088783] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Accepted: 12/07/2022] [Indexed: 12/24/2022] Open
Abstract
Bacterial small RNAs (sRNAs) research has accelerated over the past decade, boosted by advances in RNA-seq technologies and methodologies for capturing both protein-RNA and RNA-RNA interactions. The emerging picture is that these regulatory sRNAs play important roles in controlling complex physiological processes and are required to survive the antimicrobial challenge. In recent years, the RNA content of OMVs/EVs has also gained increasing attention, particularly in the context of infection. Secreted RNAs from several bacterial pathogens have been characterized but the exact mechanisms promoting pathogenicity remain elusive. In this review, we briefly discuss how secreted sRNAs interact with targets in infected cells, thus representing a novel perspective of host cell manipulation during bacterial infection. During the last decade, Acinetobacter baumannii became clinically relevant emerging pathogens responsible for nosocomial and community-acquired infections. Therefore, we also summarize recent findings of regulation by sRNAs in A. baumannii and discuss how this emerging bacterium utilizes many of these sRNAs to adapt to its niche and become successful human pathogen.
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Affiliation(s)
- Meysam Sarshar
- Research Laboratories, Bambino Gesù Children’s Hospital, IRCCS, Rome, Italy,*Correspondence: Meysam Sarshar, ; Andrea Masotti,
| | - Daniela Scribano
- Department of Public Health and Infectious Diseases, Sapienza University of Rome, Rome, Italy
| | - Anna Teresa Palamara
- Laboratory Affiliated to Institute Pasteur Italia-Cenci Bolognetti Foundation, Department of Public Health and Infectious Diseases, Sapienza University of Rome, Rome, Italy,Department of Infectious Diseases, National Institute of Health, Rome, Italy
| | - Cecilia Ambrosi
- Department of Human Sciences and Promotion of the Quality of Life, San Raffaele Roma Open University, Rome, Italy,IRCCS San Raffaele Roma, Rome, Italy
| | - Andrea Masotti
- Research Laboratories, Bambino Gesù Children’s Hospital, IRCCS, Rome, Italy,*Correspondence: Meysam Sarshar, ; Andrea Masotti,
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Galzitskaya OV, Kurpe SR, Panfilov AV, Glyakina AV, Grishin SY, Kochetov AP, Deryusheva EI, Machulin AV, Kravchenko SV, Domnin PA, Surin AK, Azev VN, Ermolaeva SA. Amyloidogenic Peptides: New Class of Antimicrobial Peptides with the Novel Mechanism of Activity. Int J Mol Sci 2022; 23:5463. [PMID: 35628272 PMCID: PMC9140876 DOI: 10.3390/ijms23105463] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2022] [Revised: 04/28/2022] [Accepted: 05/11/2022] [Indexed: 12/13/2022] Open
Abstract
Antibiotic-resistant bacteria are recognized as one of the leading causes of death in the world. We proposed and successfully tested peptides with a new mechanism of antimicrobial action "protein silencing" based on directed co-aggregation. The amyloidogenic antimicrobial peptide (AAMP) interacts with the target protein of model or pathogenic bacteria and forms aggregates, thereby knocking out the protein from its working condition. In this review, we consider antimicrobial effects of the designed peptides on two model organisms, E. coli and T. thermophilus, and two pathogenic organisms, P. aeruginosa and S. aureus. We compare the amino acid composition of proteomes and especially S1 ribosomal proteins. Since this protein is inherent only in bacterial cells, it is a good target for studying the process of co-aggregation. This review presents a bioinformatics analysis of these proteins. We sum up all the peptides predicted as amyloidogenic by several programs and synthesized by us. For the four organisms we studied, we show how amyloidogenicity correlates with antibacterial properties. Let us especially dwell on peptides that have demonstrated themselves as AMPs for two pathogenic organisms that cause dangerous hospital infections, and in which the minimal inhibitory concentration (MIC) turned out to be comparable to the MIC of gentamicin sulfate. All this makes our study encouraging for the further development of AAMP. The hybrid peptides may thus provide a starting point for the antibacterial application of amyloidogenic peptides.
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Affiliation(s)
- Oxana V. Galzitskaya
- Institute of Protein Research, Russian Academy of Sciences, 142290 Pushchino, Russia; (S.R.K.); (A.V.P.); (A.V.G.); (S.Y.G.); (A.K.S.)
- Institute of Theoretical and Experimental Biophysics, Russian Academy of Sciences, 142290 Pushchino, Russia
| | - Stanislav R. Kurpe
- Institute of Protein Research, Russian Academy of Sciences, 142290 Pushchino, Russia; (S.R.K.); (A.V.P.); (A.V.G.); (S.Y.G.); (A.K.S.)
| | - Alexander V. Panfilov
- Institute of Protein Research, Russian Academy of Sciences, 142290 Pushchino, Russia; (S.R.K.); (A.V.P.); (A.V.G.); (S.Y.G.); (A.K.S.)
| | - Anna V. Glyakina
- Institute of Protein Research, Russian Academy of Sciences, 142290 Pushchino, Russia; (S.R.K.); (A.V.P.); (A.V.G.); (S.Y.G.); (A.K.S.)
- Institute of Mathematical Problems of Biology, Russian Academy of Sciences, 142290 Pushchino, Russia
- Keldysh Institute of Applied Mathematics, Russian Academy of Sciences, 125047 Moscow, Russia
| | - Sergei Y. Grishin
- Institute of Protein Research, Russian Academy of Sciences, 142290 Pushchino, Russia; (S.R.K.); (A.V.P.); (A.V.G.); (S.Y.G.); (A.K.S.)
| | - Alexey P. Kochetov
- The Branch of the Institute of Bioorganic Chemistry, Russian Academy of Sciences, 142290 Pushchino, Russia; (A.P.K.); (V.N.A.)
| | - Evgeniya I. Deryusheva
- Institute for Biological Instrumentation, Federal Research Center “Pushchino Scientific Center for Biological Research of the Russian Academy of Sciences”, 142290 Pushchino, Russia;
| | - Andrey V. Machulin
- Skryabin Institute of Biochemistry and Physiology of Microorganisms, Federal Research Center “Pushchino Scientific Center for Biological Research of the Russian Academy of Science”, 142290 Pushchino, Russia;
| | - Sergey V. Kravchenko
- Institute of Environmental and Agricultural Biology (X-BIO), Tyumen State University, 625003 Tyumen, Russia;
| | - Pavel A. Domnin
- Gamaleya Research Centre of Epidemiology and Microbiology, 123098 Moscow, Russia; (P.A.D.); (S.A.E.)
- Biology Faculty, Lomonosov Moscow State University, 119991 Moscow, Russia
| | - Alexey K. Surin
- Institute of Protein Research, Russian Academy of Sciences, 142290 Pushchino, Russia; (S.R.K.); (A.V.P.); (A.V.G.); (S.Y.G.); (A.K.S.)
- The Branch of the Institute of Bioorganic Chemistry, Russian Academy of Sciences, 142290 Pushchino, Russia; (A.P.K.); (V.N.A.)
- State Research Center for Applied Microbiology and Biotechnology, 142279 Obolensk, Russia
| | - Viacheslav N. Azev
- The Branch of the Institute of Bioorganic Chemistry, Russian Academy of Sciences, 142290 Pushchino, Russia; (A.P.K.); (V.N.A.)
| | - Svetlana A. Ermolaeva
- Gamaleya Research Centre of Epidemiology and Microbiology, 123098 Moscow, Russia; (P.A.D.); (S.A.E.)
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