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Panteleev PV, Safronova VN, Duan S, Komlev AS, Bolosov IA, Kruglikov RN, Kombarova TI, Korobova OV, Pereskokova ES, Borzilov AI, Dyachenko IA, Shamova OV, Huang Y, Shi Q, Ovchinnikova TV. Novel BRICHOS-Related Antimicrobial Peptides from the Marine Worm Heteromastus filiformis: Transcriptome Mining, Synthesis, Biological Activities, and Therapeutic Potential. Mar Drugs 2023; 21:639. [PMID: 38132960 PMCID: PMC10745061 DOI: 10.3390/md21120639] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2023] [Revised: 12/08/2023] [Accepted: 12/12/2023] [Indexed: 12/23/2023] Open
Abstract
Marine polychaetes represent an extremely rich and underexplored source of novel families of antimicrobial peptides (AMPs). The rapid development of next generation sequencing technologies and modern bioinformatics approaches allows us to apply them for characterization of AMP-derived genes and the identification of encoded immune-related peptides with the aid of genome and transcriptome mining. Here, we describe a universal bioinformatic approach based on the conserved BRICHOS domain as a search query for the identification of novel structurally unique AMP families in annelids. In this paper, we report the discovery of 13 novel BRICHOS-related peptides, ranging from 18 to 91 amino acid residues in length, in the cosmopolitan marine worm Heteromastus filiformis with the assistance of transcriptome mining. Two characteristic peptides with a low homology in relation to known AMPs-the α-helical amphiphilic linear peptide, consisting of 28 amino acid residues and designated as HfBRI-28, and the 25-mer β-hairpin peptide, specified as HfBRI-25 and having a unique structure stabilized by two disulfide bonds-were obtained and analyzed as potential antimicrobials. Interestingly, both peptides showed the ability to kill bacteria via membrane damage, but mechanisms of their action and spectra of their activity differed significantly. Being non-cytotoxic towards mammalian cells and stable to proteolysis in the blood serum, HfBRI-25 was selected for further in vivo studies in a lethal murine model of the Escherichia coli infection, where the peptide contributed to the 100% survival rate in animals. A high activity against uropathogenic strains of E. coli (UPEC) as well as a strong ability to kill bacteria within biofilms allow us to consider the novel peptide HfBRI-25 as a promising candidate for the clinical therapy of urinary tract infections (UTI) associated with UPEC.
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Affiliation(s)
- Pavel V. Panteleev
- M.M. Shemyakin & Yu.A. Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, 117997 Moscow, Russia; (P.V.P.); (V.N.S.); (S.D.); (I.A.B.); (R.N.K.)
| | - Victoria N. Safronova
- M.M. Shemyakin & Yu.A. Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, 117997 Moscow, Russia; (P.V.P.); (V.N.S.); (S.D.); (I.A.B.); (R.N.K.)
| | - Shuting Duan
- M.M. Shemyakin & Yu.A. Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, 117997 Moscow, Russia; (P.V.P.); (V.N.S.); (S.D.); (I.A.B.); (R.N.K.)
- Shenzhen Key Lab of Marine Genomics, Guangdong Provincial Key Lab of Molecular Breeding in Marine Economic Animals, BGI Academy of Marine Sciences, BGI Marine, Shenzhen 518081, China; (Y.H.); (Q.S.)
| | - Alexey S. Komlev
- Institute of Experimental Medicine, WCRC “Center for Personalized Medicine”, 197022 St. Petersburg, Russia; (A.S.K.); (O.V.S.)
| | - Ilia A. Bolosov
- M.M. Shemyakin & Yu.A. Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, 117997 Moscow, Russia; (P.V.P.); (V.N.S.); (S.D.); (I.A.B.); (R.N.K.)
| | - Roman N. Kruglikov
- M.M. Shemyakin & Yu.A. Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, 117997 Moscow, Russia; (P.V.P.); (V.N.S.); (S.D.); (I.A.B.); (R.N.K.)
| | - Tatiana I. Kombarova
- State Research Center for Applied Microbiology & Biotechnology (SRCAMB), 142279 Obolensk, Russia; (T.I.K.); (O.V.K.); (E.S.P.); (A.I.B.)
| | - Olga V. Korobova
- State Research Center for Applied Microbiology & Biotechnology (SRCAMB), 142279 Obolensk, Russia; (T.I.K.); (O.V.K.); (E.S.P.); (A.I.B.)
| | - Eugenia S. Pereskokova
- State Research Center for Applied Microbiology & Biotechnology (SRCAMB), 142279 Obolensk, Russia; (T.I.K.); (O.V.K.); (E.S.P.); (A.I.B.)
| | - Alexander I. Borzilov
- State Research Center for Applied Microbiology & Biotechnology (SRCAMB), 142279 Obolensk, Russia; (T.I.K.); (O.V.K.); (E.S.P.); (A.I.B.)
| | - Igor A. Dyachenko
- The Branch of M.M. Shemyakin & Yu.A. Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, 142290 Pushchino, Russia;
| | - Olga V. Shamova
- Institute of Experimental Medicine, WCRC “Center for Personalized Medicine”, 197022 St. Petersburg, Russia; (A.S.K.); (O.V.S.)
| | - Yu Huang
- Shenzhen Key Lab of Marine Genomics, Guangdong Provincial Key Lab of Molecular Breeding in Marine Economic Animals, BGI Academy of Marine Sciences, BGI Marine, Shenzhen 518081, China; (Y.H.); (Q.S.)
| | - Qiong Shi
- Shenzhen Key Lab of Marine Genomics, Guangdong Provincial Key Lab of Molecular Breeding in Marine Economic Animals, BGI Academy of Marine Sciences, BGI Marine, Shenzhen 518081, China; (Y.H.); (Q.S.)
- Laboratory of Aquatic Genomics, College of Life Sciences and Oceanography, Shenzhen University, Shenzhen 518057, China
| | - Tatiana V. Ovchinnikova
- M.M. Shemyakin & Yu.A. Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, 117997 Moscow, Russia; (P.V.P.); (V.N.S.); (S.D.); (I.A.B.); (R.N.K.)
- Department of Biotechnology, I.M. Sechenov First Moscow State Medical University, 119991 Moscow, Russia
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Bolosov IA, Panteleev PV, Sychev SV, Khokhlova VA, Safronova VN, Toropygin IY, Kombarova TI, Korobova OV, Pereskokova ES, Borzilov AI, Ovchinnikova TV, Balandin SV. Design of Protegrin-1 Analogs with Improved Antibacterial Selectivity. Pharmaceutics 2023; 15:2047. [PMID: 37631261 PMCID: PMC10458893 DOI: 10.3390/pharmaceutics15082047] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2023] [Revised: 07/27/2023] [Accepted: 07/27/2023] [Indexed: 08/27/2023] Open
Abstract
Protegrin-1 (PG-1) is a cationic β-hairpin pore-forming antimicrobial peptide having a membranolytic mechanism of action. It possesses in vitro a potent antimicrobial activity against a panel of clinically relevant MDR ESKAPE pathogens. However, its extremely high hemolytic activity and cytotoxicity toward mammalian cells prevent the further development of the protegrin-based antibiotic for systemic administration. In this study, we rationally modulated the PG-1 charge and hydrophobicity by substituting selected residues in the central β-sheet region of PG-1 to design its analogs, which retain a high antimicrobial activity but have a reduced toxicity toward mammalian cells. In this work, eight PG-1 analogs with single amino acid substitutions and five analogs with double substitutions were obtained. These analogs were produced as thioredoxin fusions in Escherichia coli. It was shown that a significant reduction in hemolytic activity without any loss of antimicrobial activity could be achieved by a single amino acid substitution, V16R in the C-terminal β-strand, which is responsible for the PG-1 oligomerization. As the result, a selective analog with a ≥30-fold improved therapeutic index was obtained. FTIR spectroscopy analysis of analog, [V16R], revealed that the peptide is unable to form oligomeric structures in a membrane-mimicking environment, in contrast to wild-type PG-1. Analog [V16R] showed a reasonable efficacy in septicemia infection mice model as a systemic antibiotic and could be considered as a promising lead for further drug design.
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Affiliation(s)
- Ilia A. Bolosov
- M. M. Shemyakin & Yu. A. Ovchinnikov Institute of Bioorganic Chemistry, the Russian Academy of Sciences, 117997 Moscow, Russia; (I.A.B.); (P.V.P.); (T.V.O.)
| | - Pavel V. Panteleev
- M. M. Shemyakin & Yu. A. Ovchinnikov Institute of Bioorganic Chemistry, the Russian Academy of Sciences, 117997 Moscow, Russia; (I.A.B.); (P.V.P.); (T.V.O.)
| | - Sergei V. Sychev
- M. M. Shemyakin & Yu. A. Ovchinnikov Institute of Bioorganic Chemistry, the Russian Academy of Sciences, 117997 Moscow, Russia; (I.A.B.); (P.V.P.); (T.V.O.)
| | - Veronika A. Khokhlova
- M. M. Shemyakin & Yu. A. Ovchinnikov Institute of Bioorganic Chemistry, the Russian Academy of Sciences, 117997 Moscow, Russia; (I.A.B.); (P.V.P.); (T.V.O.)
| | - Victoria N. Safronova
- M. M. Shemyakin & Yu. A. Ovchinnikov Institute of Bioorganic Chemistry, the Russian Academy of Sciences, 117997 Moscow, Russia; (I.A.B.); (P.V.P.); (T.V.O.)
| | - Ilia Yu. Toropygin
- V. N. Orekhovich Research Institute of Biomedical Chemistry, 119121 Moscow, Russia
| | - Tatiana I. Kombarova
- State Research Center for Applied Microbiology & Biotechnology (SRCAMB), 142279 Obolensk, Russia
| | - Olga V. Korobova
- State Research Center for Applied Microbiology & Biotechnology (SRCAMB), 142279 Obolensk, Russia
| | - Eugenia S. Pereskokova
- State Research Center for Applied Microbiology & Biotechnology (SRCAMB), 142279 Obolensk, Russia
| | - Alexander I. Borzilov
- State Research Center for Applied Microbiology & Biotechnology (SRCAMB), 142279 Obolensk, Russia
| | - Tatiana V. Ovchinnikova
- M. M. Shemyakin & Yu. A. Ovchinnikov Institute of Bioorganic Chemistry, the Russian Academy of Sciences, 117997 Moscow, Russia; (I.A.B.); (P.V.P.); (T.V.O.)
- Department of Biotechnology, I. M. Sechenov First Moscow State Medical University, 119991 Moscow, Russia
| | - Sergey V. Balandin
- M. M. Shemyakin & Yu. A. Ovchinnikov Institute of Bioorganic Chemistry, the Russian Academy of Sciences, 117997 Moscow, Russia; (I.A.B.); (P.V.P.); (T.V.O.)
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Volozhantsev NV, Borzilov AI, Shpirt AM, Krasilnikova VM, Verevkin VV, Denisenko EA, Kombarova TI, Shashkov AS, Knirel YA, Dyatlov IA. Comparison of the therapeutic potential of bacteriophage KpV74 and phage-derived depolymerase (β-glucosidase) against Klebsiella pneumoniae capsular type K2. Virus Res 2022; 322:198951. [PMID: 36191686 DOI: 10.1016/j.virusres.2022.198951] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2022] [Revised: 09/16/2022] [Accepted: 09/29/2022] [Indexed: 12/24/2022]
Abstract
Bacteriophages and phage polysaccharide-degrading enzymes (depolymerases) are garnering attention as possible alternatives to antibiotics. Here, we describe the antimicrobial properties of bacteriophage KpV74 and phage depolymerase Dep_kpv74 specific to the hypervirulent Klebsiella pneumoniae of the K2 capsular type. The depolymerase Dep_kpv74 was identified as a specific glucosidase that cleaved the K2 type capsular polysaccharides of the K. pneumoniae by a hydrolytic mechanism. This depolymerase was effective against thigh soft tissue K. pneumoniae infection in mice without inducing adverse behavioral effects or toxicity. The depolymerase efficiency was similar to or greater than the bacteriophage efficiency. The phage KpV74 had a therapeutic effect only for treating the infection caused by the phage-propagating K. pneumoniae strain and was completely inactive against the infection caused by the K. pneumoniae strain that did not support phage multiplication. The depolymerase was effective in both cases. A mutant resistant to phage and depolymerase was isolated during the treatment of mice with bacteriophage. A confirmed one-base deletion in the flippase-coding wzx gene of this mutant is assumed to affect the polysaccharide capsule, abolishing the KpV74 phage adsorption and reducing the K. pneumoniae virulence.
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Affiliation(s)
- Nikolay V Volozhantsev
- State Research Center for Applied Microbiology and Biotechnology, 142279 Obolensk, City District Serpukhov, Moscow Region, Russia.
| | - Alexander I Borzilov
- State Research Center for Applied Microbiology and Biotechnology, 142279 Obolensk, City District Serpukhov, Moscow Region, Russia
| | - Anna M Shpirt
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 119991 Moscow, Russia
| | - Valentina M Krasilnikova
- State Research Center for Applied Microbiology and Biotechnology, 142279 Obolensk, City District Serpukhov, Moscow Region, Russia
| | - Vladimir V Verevkin
- State Research Center for Applied Microbiology and Biotechnology, 142279 Obolensk, City District Serpukhov, Moscow Region, Russia
| | - Egor A Denisenko
- State Research Center for Applied Microbiology and Biotechnology, 142279 Obolensk, City District Serpukhov, Moscow Region, Russia
| | - Tatyana I Kombarova
- State Research Center for Applied Microbiology and Biotechnology, 142279 Obolensk, City District Serpukhov, Moscow Region, Russia
| | - Alexander S Shashkov
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 119991 Moscow, Russia
| | - Yuriy A Knirel
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 119991 Moscow, Russia
| | - Ivan A Dyatlov
- State Research Center for Applied Microbiology and Biotechnology, 142279 Obolensk, City District Serpukhov, Moscow Region, Russia
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Safronova VN, Bolosov IA, Kruglikov RN, Korobova OV, Pereskokova ES, Borzilov AI, Panteleev PV, Ovchinnikova TV. Novel β-Hairpin Peptide from Marine Polychaeta with a High Efficacy against Gram-Negative Pathogens. Mar Drugs 2022; 20:md20080517. [PMID: 36005520 PMCID: PMC9410094 DOI: 10.3390/md20080517] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2022] [Revised: 08/09/2022] [Accepted: 08/11/2022] [Indexed: 01/20/2023] Open
Abstract
In recent years, new antibiotics targeting multidrug resistant Gram-negative bacteria have become urgently needed. Therefore, antimicrobial peptides are considered to be a novel perspective class of antibacterial agents. In this study, a panel of novel BRICHOS-related β-hairpin antimicrobial peptides were identified in transcriptomes of marine polychaeta species. Two of them—abarenicin from Abarenicola pacifica and UuBRI-21 from Urechis unicinctus—possess strong antibacterial potential in vitro against a wide panel of Gram-negative bacteria including drug-resistant strains. Mechanism of action assays demonstrate that peptides disrupt bacterial and mammalian membrane integrity. Considering the stronger antibacterial potential and a low ability of abarenicin to be bound by components of serum, this peptide was selected for further modification. We conducted an alanine and arginine scanning of abarenicin by replacing individual amino acids and modulating hydrophobicity so as to improve its antibacterial potency and membrane selectivity. This design approach allowed us to obtain the Ap9 analog displaying a high efficacy in vivo in the mice septicemia and neutropenic mice peritonitis models. We demonstrated that abarenicin analogs did not significantly induce bacterial resistance after a four-week selection experiment and acted on different steps of the biofilm formation: (a) killing bacteria at their planktonic stage and preventing biofilm formation and (b) degrading pre-formed biofilm and killing embedded bacteria. The potent antibacterial and antibiofilm activity of the abarenicin analog Ap9 with its high efficacy in vivo against Gram-negative infection in mice models makes this peptide an attractive candidate for further preclinical investigation.
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Affiliation(s)
- Victoria N. Safronova
- M. M. Shemyakin & Yu. A. Ovchinnikov Institute of Bioorganic Chemistry, The Russian Academy of Sciences, Miklukho-Maklaya Str., 16/10, 117997 Moscow, Russia
| | - Ilia A. Bolosov
- M. M. Shemyakin & Yu. A. Ovchinnikov Institute of Bioorganic Chemistry, The Russian Academy of Sciences, Miklukho-Maklaya Str., 16/10, 117997 Moscow, Russia
| | - Roman N. Kruglikov
- M. M. Shemyakin & Yu. A. Ovchinnikov Institute of Bioorganic Chemistry, The Russian Academy of Sciences, Miklukho-Maklaya Str., 16/10, 117997 Moscow, Russia
| | - Olga V. Korobova
- State Research Center for Applied Microbiology & Biotechnology (SRCAMB), 142279 Obolensk, Russia
| | - Eugenia S. Pereskokova
- State Research Center for Applied Microbiology & Biotechnology (SRCAMB), 142279 Obolensk, Russia
| | - Alexander I. Borzilov
- State Research Center for Applied Microbiology & Biotechnology (SRCAMB), 142279 Obolensk, Russia
| | - Pavel V. Panteleev
- M. M. Shemyakin & Yu. A. Ovchinnikov Institute of Bioorganic Chemistry, The Russian Academy of Sciences, Miklukho-Maklaya Str., 16/10, 117997 Moscow, Russia
- Correspondence: (P.V.P.); (T.V.O.)
| | - Tatiana V. Ovchinnikova
- M. M. Shemyakin & Yu. A. Ovchinnikov Institute of Bioorganic Chemistry, The Russian Academy of Sciences, Miklukho-Maklaya Str., 16/10, 117997 Moscow, Russia
- Department of Bioorganic Chemistry, Faculty of Biology, Lomonosov Moscow State University, 119234 Moscow, Russia
- Correspondence: (P.V.P.); (T.V.O.)
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V. Volozhantsev N, M. Shpirt A, I. Borzilov A, V. Komisarova E, M. Krasilnikova V, S. Shashkov A, V. Verevkin V, A. Knirel Y. Characterization and Therapeutic Potential of Bacteriophage-Encoded Polysaccharide Depolymerases with β Galactosidase Activity against Klebsiella pneumoniae K57 Capsular Type. Antibiotics (Basel) 2020; 9:antibiotics9110732. [PMID: 33113762 PMCID: PMC7693772 DOI: 10.3390/antibiotics9110732] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2020] [Revised: 10/22/2020] [Accepted: 10/23/2020] [Indexed: 12/13/2022] Open
Abstract
Bacteriophages and phage enzymes are considered as possible alternatives to antibiotics in the treatment of infections caused by antibiotic-resistant bacteria. Due to the ability to cleave the capsular polysaccharides (CPS), one of the main virulence factors of Klebsiella pneumoniae, phage depolymerases, has potential in the treatment of K. pneumoniae infections. Here, we characterized in vivo two novel phage-encoded polysaccharide depolymerases as therapeutics against clinical isolates of K. pneumoniae. The depolymerases Dep_kpv79 and Dep_kpv767 encoded by Klebsiella phages KpV79 (Myoviridae; Jedunavirus) and KpV767 (Autographiviridae, Studiervirinae, Przondovirus), respectively, were identified as specific β-galactosidases that cleave the K. pneumoniae K57 type CPS by the hydrolytic mechanism. They were found to be highly effective at combating sepsis and hip infection caused by K. pneumoniae in lethal mouse models. Here, 80–100% of animals were protected against death by a single dose (e.g., 50 μg/mouse) of the enzyme injected 0.5 h after infection by K. pneumoniae strains of the K57 capsular type. The therapeutic effect of the depolymerases is because they strip the capsule and expose the underlying bacterium to the immune attack such as complement-mediated killing. These data provide one more confirmation that phage polysaccharide depolymerases represent a promising tool for antimicrobial therapy.
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Affiliation(s)
- Nikolay V. Volozhantsev
- State Research Center for Applied Microbiology and Biotechnology, 142279 Obolensk, Moscow Region, Russia; (A.I.B.); (E.V.K.); (V.M.K.); (V.V.V.)
- Correspondence:
| | - Anna M. Shpirt
- N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prospekt 47, 119991 Moscow, Russia; (A.M.S.); (A.S.S.); (Y.A.K.)
| | - Alexander I. Borzilov
- State Research Center for Applied Microbiology and Biotechnology, 142279 Obolensk, Moscow Region, Russia; (A.I.B.); (E.V.K.); (V.M.K.); (V.V.V.)
| | - Ekaterina V. Komisarova
- State Research Center for Applied Microbiology and Biotechnology, 142279 Obolensk, Moscow Region, Russia; (A.I.B.); (E.V.K.); (V.M.K.); (V.V.V.)
| | - Valentina M. Krasilnikova
- State Research Center for Applied Microbiology and Biotechnology, 142279 Obolensk, Moscow Region, Russia; (A.I.B.); (E.V.K.); (V.M.K.); (V.V.V.)
| | - Alexander S. Shashkov
- N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prospekt 47, 119991 Moscow, Russia; (A.M.S.); (A.S.S.); (Y.A.K.)
| | - Vladimir V. Verevkin
- State Research Center for Applied Microbiology and Biotechnology, 142279 Obolensk, Moscow Region, Russia; (A.I.B.); (E.V.K.); (V.M.K.); (V.V.V.)
| | - Yuriy A. Knirel
- N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prospekt 47, 119991 Moscow, Russia; (A.M.S.); (A.S.S.); (Y.A.K.)
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Lev AI, Astashkin EI, Kislichkina AA, Solovieva EV, Kombarova TI, Korobova OV, Ershova ON, Alexandrova IA, Malikov VE, Bogun AG, Borzilov AI, Volozhantsev NV, Svetoch EA, Fursova NK. Comparative analysis of Klebsiella pneumoniae strains isolated in 2012-2016 that differ by antibiotic resistance genes and virulence genes profiles. Pathog Glob Health 2018; 112:142-151. [PMID: 29708041 DOI: 10.1080/20477724.2018.1460949] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022] Open
Abstract
The antibacterial resistance and virulence genotypes and phenotypes of 148 non-duplicate Klebsiella pneumoniae strains collected from 112 patients in Moscow hospitals in 2012-2016 including isolates from the respiratory system (57%), urine (30%), wounds (5%), cerebrospinal fluid (4%), blood (3%), and rectal swab (1%) were determined. The majority (98%) were multidrug resistant (MDR) strains carrying blaSHV (91%), blaCTX-M (74%), blaTEM (51%), blaOXA (38%), and blaNDM (1%) beta-lactamase genes, class 1 integrons (38%), and the porin protein gene ompK36 (96%). The beta-lactamase genes blaTEM-1, blaSHV-1, blaSHV-11, blaSHV-110, blaSHV-190, blaCTX-M-15, blaCTX-M-3, blaCTX-M-55, blaOXA-48, blaOXA-244, and blaNDM-1 were detected; class 1 integron gene cassette arrays (aadA1), (dfrA7), (dfrA1-orfC), (aadB-aadA1), (dfrA17-aadA5), and (dfrA12-orfF-aadA2) were identified. Twenty-two (15%) of clinical K. pneumoniae strains had hypermucoviscous (HV) phenotype defined as string test positive. The rmpA gene associated with HV phenotype was detected in 24% of strains. The intrapersonal mutation of rmpA gene (deletion of one nucleotide at the polyG tract) was a reason for negative hypermucoviscosity phenotype and low virulence of rmpA-positive K. pneumoniae strain KPB584. Eighteen virulent for mice strains with LD50 ≤ 104 CFU were attributed to sequence types ST23, ST86, ST218, ST65, ST2174, and ST2280 and to capsular types K1, K2, and K57. This study is the first report about hypervirulent K. pneumoniae strain KPB2580-14 of ST23K1 harboring extended-spectrum beta-lactamase CTX-M-15 and carbapenemase OXA-48 genes located on pCTX-M-15-like and pOXA-48-like plasmids correspondingly.
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Affiliation(s)
- Anastasia I Lev
- a State Research Center for Applied Microbiology and Biotechnology , Obolensk , Russia
| | - Eugeny I Astashkin
- a State Research Center for Applied Microbiology and Biotechnology , Obolensk , Russia
| | | | - Ekaterina V Solovieva
- a State Research Center for Applied Microbiology and Biotechnology , Obolensk , Russia
| | - Tatiana I Kombarova
- a State Research Center for Applied Microbiology and Biotechnology , Obolensk , Russia
| | - Olga V Korobova
- a State Research Center for Applied Microbiology and Biotechnology , Obolensk , Russia
| | - Olga N Ershova
- b Center for Neurosurgery (Academician Burdenko) , Moscow , Russia
| | | | | | - Alexander G Bogun
- a State Research Center for Applied Microbiology and Biotechnology , Obolensk , Russia
| | - Alexander I Borzilov
- a State Research Center for Applied Microbiology and Biotechnology , Obolensk , Russia
| | | | - Edward A Svetoch
- a State Research Center for Applied Microbiology and Biotechnology , Obolensk , Russia
| | - Nadezhda K Fursova
- a State Research Center for Applied Microbiology and Biotechnology , Obolensk , Russia
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Svetoch EA, Borzilov AI, Eruslanov BV, Korobova OV, Kombarova TI, Levchuk VP, Teĭmurazov MG, Stepanshin IG, Marinin LI, Diatlov IA. [Efficacy of enterocin S760 in treatment of mice with anthrax infection due to Bacillus anthracis M-71]. Antibiot Khimioter 2011; 56:13-18. [PMID: 22586898] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The therapeutic efficacy of enterocin S760, a broad spectrum antimicrobial peptide produced by Enterococcus faecium LWP760 was tested on mice infected with Bacillus anthracis M-71 to induce anthrax (second Tsenkovsky's vaccine). Intraperitoneal four-, two- or one-fold administration of the peptide in a dose of 25 mg/kg for 10 days for prophylactic (1 hour after the contamination) and therapeutic (24 hours after the contamination) purposes prevented or cured the infection in 90-100% of the mice versus the 100-percent lethality in the control (untreated animals). The antimicrobial activity of enterocin S760 against B. anthracis M-71 in vivo correlated with activity in vitro. Enterocin S760 is considered a novel promising antimicrobial for the treatment of grampositive and gramnegative infections.
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Svetoch EA, Borzilov AI, Eruslanov BV, Korobova OV, Teĭmurazov MG, Kombarova TI, Diatlov IA. [Use of enterocin S760 for prevention and treatment of experimental Salmonella infection in mice]. Zh Mikrobiol Epidemiol Immunobiol 2010:44-48. [PMID: 21061577] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
AIM To demonstrate treatment efficacy of bacteriocin S760 synthesized by Enterococcus faecium 760 for septic Salmonella infection in mice. MATERIALS AND METHODS One hundred mice, which were intraperitoneally inoculated with 100 LD50 of Salmonella enteritidis strain 92 Rif(r), received bacteriocin 1 hour (prevention) or 48 hours (treatment) after inoculation in doses 25, 50, or 100 mg/kg every 6 hours during 5 or 10 days. RESULTS Use of peptide S760 for prophylaxis in dose 50 mg/kg during 10 days prevented lethal infection in 100% of animals, whereas its use for treatment cured 70% of animals with generalized salmonellosis. Shortening of treatment course from 10 to 5 days and reducing dose of bacteriocin led to less pronounced treatment effect but in all animals it was expressed by increase of mean length of life compared to control (not treated). CONCLUSION Obtained results demonstrated high treatment efficacy of bacteriocin S760 during septic salmonellosis and perspectives of its use in medicine and animal health.
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