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Comparative Investigation of the Composition and Structure of Microbial Biofilms Retrieved at Meat-Processing Plants Using Different Raw Materials. Microbiology (Reading) 2022. [DOI: 10.1134/s0026261722601403] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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2
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Architecture of Condensed DNA in the Nucleoid of Escherichia coli Bacterium. Biophysics (Nagoya-shi) 2022. [DOI: 10.1134/s0006350922040133] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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3
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Synthesis of Biogenic Amines by Lactic Acid Bacteria on Media of Plant and Animal Origin. Microbiology (Reading) 2022. [DOI: 10.1134/s0026261722300208] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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4
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Effect of Epinephrine, Norepinephrine, and Estradiol on Persister Formation in the Cultures of Staphylococci from the Human Microbiota and Their Resistance to Starvation and New Medium Stresses. Microbiology (Reading) 2022. [DOI: 10.1134/s0026261722300063] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
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5
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Erratum to: New Biocomposite Materials Based on Hydrocarbon-Oxidizing Microorganisms and Their Potential for Oil Products Degradation. Microbiology (Reading) 2022. [DOI: 10.1134/s0026261722300142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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6
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New Biocomposite Materials Based on Hydrocarbon-Oxidizing Microorganisms and Their Potential for Oil Products Degradation. Microbiology (Reading) 2021. [DOI: 10.1134/s0026261721060114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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7
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Highly Persistent Strains of Hydrocarbon-Oxidizing Bacteria as a Base for Increasing the Viable Cell Numbers during Long-Term Storage. Microbiology (Reading) 2021. [DOI: 10.1134/s0026261721060126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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Abstract
Ever decreasing efficiency of antibiotic treatment due to growing antibiotic resistance of pathogenic bacteria is a critical issue in clinical practice. The two generally accepted major approaches to this problem are the search for new antibiotics and the development of antibiotic adjuvants to enhance the antimicrobial activity of known compounds. It was therefore the aim of the present study to test whether alkylresorcinols, a class of phenolic lipids, can be used as adjuvants to potentiate the effect of various classes of antibiotics. Alkylresorcinols were combined with 12 clinically used antibiotics. Growth-inhibiting activity against a broad range of pro- and eukaryotic microorganisms was determined. Test organisms did comprise 10 bacterial and 2 fungal collection strains, including E. coli and S. aureus, and clinical isolates of K. pneumoniae. The highest adjuvant activity was observed in the case of 4-hexylresorcinol (4-HR), a natural compound found in plants with antimicrobial activity. 50% of the minimal inhibitory concentration (MIC) of 4-HR caused an up to 50-fold decrease in the MIC of antibiotics of various classes. Application of 4-HR as an adjuvant revealed its efficiency against germination of bacterial dormant forms (spores) and prevented formation of antibiotic-tolerant persister cells. Using an in vivo mouse model of K. pneumoniae-induced sepsis, we could demonstrate that the combination of 4-HR and polymyxin was highly effective. 75% of animals were free of infection after treatment as compared to none of the animals receiving the antibiotic alone. We conclude that alkylresorcinols such as 4-HR can be used as an adjuvant to increase the efficiency of several known antibiotics. We suggest that by this approach the risk for development of genetically determined antibiotic resistance can be minimized due to the multimodal mode of action of 4-HR.
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Formation and Properties of Persister Cells of Staphylococcus capitis and Staphylococcus epidermidis, Bacteria Inhabiting Human Skin. Microbiology (Reading) 2020. [DOI: 10.1134/s0026261720040104] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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10
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Role of Humic Compounds in Viability Prolongation of the Cells of Hydrocarbon-Oxidizing Bacteria. Microbiology (Reading) 2020. [DOI: 10.1134/s0026261719060122] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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11
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Functional Activity of Humic Substances in Survival Prolongation of Populations of Hydrocarbon-Oxidizing Bacteria Acinetobacter junii. Microbiology (Reading) 2020. [DOI: 10.1134/s0026261720010105] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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13
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Buried Soils as a New Source for Isolation of Biotechnologically Significant Bacterial Strains. Microbiology (Reading) 2019. [DOI: 10.1134/s0026261719050059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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14
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Ultrastructural Organization and Enzymes of the Antioxidant Defense System in the Dormant Cells of Gram-Negative Bacteria Stenotrophomonas sp. Strain FM3 and Morganella morganii subsp. sibonii Strain FF1. Microbiology (Reading) 2019. [DOI: 10.1134/s0026261719020115] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
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15
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Bacteria Isolated from Antarctic Permafrost are Efficient Antibiotic Producers. Microbiology (Reading) 2018. [DOI: 10.1134/s0026261718050089] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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17
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Biocrystalline structures in the nucleoids of the stationary and dormant prokaryotic cells. Microbiology (Reading) 2017. [DOI: 10.1134/s002626171706011x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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18
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Regulation of phase variation in type I pili formation in Escherichia coli: Role of alkylresorcinols, microbial autoregulators. Microbiology (Reading) 2017. [DOI: 10.1134/s0026261717050149] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
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19
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Model of the regulation of activity of immobilized enzymes (amylases) in soil. Microbiology (Reading) 2017. [DOI: 10.1134/s0026261717020060] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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20
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[Model of the Regulation of Activity of Immobilized Enzymes (Amylases) in Soil]. MIKROBIOLOGIIA 2017; 86:217-228. [PMID: 30299066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The preservation of activity of extracellular enzymes in soil is presently associated with their immobilization on organic or inorganic carriers. Enzyme immobilization results, however, in a significant decrease in enzymatic activity. In the present work, the mechanism responsible for promotion of the catalytic activity was revealed, as well as the favorable effect of low-molecular alkylhydrozybenzenes of the class of alkylresorcinols, which are common in soil organic matter, on stability of immobilized enzymes (exemplified by amylases) by their post-translational modification. Optimal conditions (enzyme to sorbent ratio, pH optimum, CaCl2 concentration, and sorption time) for amylase sorption on a biological sorbent (yeast cell walls) were determined and decreased activity of the immobilized enzyme compared to its dissolved state was confirmed. Alkylresorcinols (C7AHB) at concentrations of 1.6 to 80 mM were found to cause an increase of amylase activity both in the case of already sorbed enzymes (by 30%) and in the case of a free dissolved enzyme with its subsequent immobilization (by 50–60%). In both cases, the optimal C7AHB concentration was 16 mM. Amylase stability was determined for C7AHB-modified and unmodified enzymes immobilized on the biological sorbent after two cycles of freezing (–20°C) and thawing (4°C). Inverse dependence was revealed between increasing stability of C7AHB-modified enzymes and an increase in their activity, as well as higher stability of immobilized modified amylases than of the dissolved modified enzyme. Investigation of the effect of C7HOB-modification in the preservation of activity in immobilized amylases after four freeze–thaw cycles revealed: (1) better preservation of activity by the modified immobilized enzymes compared to immobilized ones; (2) differences in the dynamics of activity loss within compared pairs, with activity of immobilized amylases decreasing after the second cycle to a lower level (42%) than activity of the modified immobilized enzymes after the fourth cycle (48%). These results demonstrate that in the preservation of activity of extracellular enzymes in soil both stabilization mechanisms are of importance: immobilization on organic carriers and modification of the enzyme conformation by low-molecular compounds with the functions of chemical chaperones.
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Role of neuromediators in the functioning of the human microbiota: “Business talks” among microorganisms and the microbiota-host dialogue. Microbiology (Reading) 2016. [DOI: 10.1134/s0026261716010082] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
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22
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Characterization of the structure of the prokaryotic complex of Antarctic permafrost by molecular genetic techniques. Microbiology (Reading) 2016. [DOI: 10.1134/s0026261716010057] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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Effect of inherent immunity factors on development of antibiotic tolerance and survival of bacterial populations under antibiotic attack. Microbiology (Reading) 2015. [DOI: 10.1134/s0026261715060028] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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25
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Effect of stress on emergence of antibiotic-tolerant Escherichia coli cells. Microbiology (Reading) 2015. [DOI: 10.1134/s0026261715050148] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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26
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Applicability of MALDI mass spectrometry for diagnostics of phase variants in bacterial populations. Microbiology (Reading) 2015. [DOI: 10.1134/s0026261715030121] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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27
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Effect of alkylresorcinols on thermal denaturation and refolding of bacterial luciferase and synthesis of heat shock proteins revealed in the luminescent molecular and cellular test systems. Microbiology (Reading) 2014. [DOI: 10.1134/s0026261714060046] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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28
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Activation of formation of bacterial biofilms by azithromycin and prevention of this effect. Microbiology (Reading) 2014. [DOI: 10.1134/s0026261714060113] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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Comparative analysis of the functional activity and composition of hydrolytic microbial complexes from the lower Volga barrow and modern chestnut soils. Microbiology (Reading) 2014. [DOI: 10.1134/s002626171405018x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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Regulation of chicken egg lysozyme functional properties by interaction with 5-methylresorcinol. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY B 2014. [DOI: 10.1134/s1990793114040228] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Changes in the phase variant spectra in the populations of lactic acid bacteria under antibiotic treatment. Microbiology (Reading) 2014. [DOI: 10.1134/s0026261714030114] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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32
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Dormant state and phenotypic variability of Staphylococcus aureus and Corynebacterium pseudodiphtheriticum. Microbiology (Reading) 2014. [DOI: 10.1134/s0026261713060088] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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33
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Stress-protective and cross action of the extracellular reactivating factor of the microorganisms of the domains Bacteria, Archaea, and Eukaryota. Microbiology (Reading) 2013. [DOI: 10.1134/s0026261713050159] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
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34
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Effect of a dormant state on the xenobiotic-degrading strain Pseudomonas fluorescens 26K. Microbiology (Reading) 2013. [DOI: 10.1134/s0026261713050135] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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35
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Negative effect of alkylresorcinols on motility of rhizobacteria Azospirillum brasilense. Microbiology (Reading) 2013. [DOI: 10.1134/s0026261713040103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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36
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Effective PCR detection of vegetative and dormant bacterial cells due to a unified method for preparation of template DNA encased within cell envelopes. Microbiology (Reading) 2013. [DOI: 10.1134/s0026261713020100] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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37
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Impact of bacterial autoregulatory molecules (homoserine lactones and alkylhydroxybenzenes) on the oxidative metabolism of the cell effectors of natural immunity. Microbiology (Reading) 2013. [DOI: 10.1134/s0026261713020045] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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38
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Effect of the reactivating factor of Luteococcus japonicus subsp. casei on the expression of SOS response genes. Microbiology (Reading) 2013. [DOI: 10.1134/s0026261713020094] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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39
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Comparison of the adaptive potential of the Arthrobacter oxydans and Acinetobacter lwoffii isolates from permafrost sedimentary rock and the analogous collection strains. Microbiology (Reading) 2013. [DOI: 10.1134/s0026261713010050] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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40
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Reactivation of dormant and nonculturable bacterial forms from paleosoils and subsoil permafrost. Microbiology (Reading) 2012. [DOI: 10.1134/s0026261712040108] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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41
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Possible mechanisms of the influence of hexylresorcinol on the structure-dynamic and functional properties of lysozyme protein. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY B 2012. [DOI: 10.1134/s1990793112020078] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Involvement of alkylhydroxybenzenes in the Escherichia coli response to the lethal effect of UV irradiation. Microbiology (Reading) 2012. [DOI: 10.1134/s0026261712010043] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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43
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44
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Influence of chemical chaperones on the properties of lysozyme and the reaction center protein from Rhodobacter sphaeroides. Biophysics (Nagoya-shi) 2011. [DOI: 10.1134/s0006350911010143] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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46
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Role of alkylhydroxybenzenes in bacterial adaptation to unfavorable growth conditions. Microbiology (Reading) 2010. [DOI: 10.1134/s0026261710060044] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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47
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48
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The effect of alkylhydroxybenzenes on functional and operational stability of antibodies. Microbiology (Reading) 2010. [DOI: 10.1134/s0026261710030045] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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49
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The influence of alkylhydroxybenzenes on electron stabilization processes in the quinone acceptor portion of the reaction centers of the bacterium Rhodobacter sphaeroides. Microbiology (Reading) 2010. [DOI: 10.1134/s0026261710020190] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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50
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