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Icriverzi M, Florian PE, Bonciu A, Dumitrescu LN, Moldovan A, Pelinescu D, Ionescu R, Avram I, Munteanu CVA, Sima LE, Dinca V, Rusen L, Roseanu A. Hybrid bio-nanoporous peptide loaded-polymer platforms with anticancer and antibacterial activities. Nanoscale Adv 2024; 6:2038-2058. [PMID: 38633049 PMCID: PMC11019497 DOI: 10.1039/d3na00947e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Accepted: 02/26/2024] [Indexed: 04/19/2024]
Abstract
In this study, hybrid bio-nanoporous peptides loaded onto poly(N-isopropylacrylamide-co-butylacrylate) (pNIPAM-co-BA) coatings were designed and obtained via matrix-assisted pulsed laser evaporation (MAPLE) technique. The incorporation of cationic peptides magainin (MG) and melittin (Mel) and their combination was tailored to target synergistic anticancer and antibacterial activities with low toxicity on normal mammalian cells. Atomic force microscopy, scanning electron microscopy, X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy as well as contact angle and surface energy measurements revealed the successful and functional incorporation of both the peptides within porous polymeric nanolayers as well as surface modifications (i.e. variation in the pore size diameter, surface roughness, and wettability) after Mel, MG or Mel-MG incorporation compared to pNIPAM-co-BA. In vitro testing revealed the impairment of biofilm formation on all the hybrid coatings while testing with S. aureus, E. coli and P. aeruginosa. Moreover, MG was shown to modulate the effect of Mel in the combined Mel-MG extract formulation released via pNIPAM-platforms, thus significantly reducing cancer cell proliferation through apoptosis/necrosis as revealed by flow cytometry analysis performed in vitro on HEK293T, A375, B16F1 and B16F10 cells. To the best of our knowledge, Mel-MG combination entrapped in the pNIPAM-co-BA copolymer has not yet been reported as a new promising candidate with anticancer and antibacterial properties for improved utility in the biomedical field. Mel-MG incorporation compared to pNIPAM-co-BA in in vitro testing revealed the impairment of biofilm formation in all the hybrid formulations.
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Affiliation(s)
- Madalina Icriverzi
- Institute of Biochemistry of the Romanian Academy 060031 Bucharest Romania
| | | | - Anca Bonciu
- National Institute for Lasers, Plasma, and Radiation Physics 409 Atomistilor Street 077125 Magurele Romania
| | | | - Antoniu Moldovan
- National Institute for Lasers, Plasma, and Radiation Physics 409 Atomistilor Street 077125 Magurele Romania
| | - Diana Pelinescu
- Faculty of Biology, University of Bucharest, Department of Genetics Intrarea Portocalelor no. 1-3, Sector 6 Bucharest Romania
| | - Robertina Ionescu
- Faculty of Biology, University of Bucharest, Department of Genetics Intrarea Portocalelor no. 1-3, Sector 6 Bucharest Romania
| | - Ionela Avram
- Faculty of Biology, University of Bucharest, Department of Genetics Intrarea Portocalelor no. 1-3, Sector 6 Bucharest Romania
| | | | - Livia Elena Sima
- Institute of Biochemistry of the Romanian Academy 060031 Bucharest Romania
| | - Valentina Dinca
- National Institute for Lasers, Plasma, and Radiation Physics 409 Atomistilor Street 077125 Magurele Romania
| | - Laurentiu Rusen
- National Institute for Lasers, Plasma, and Radiation Physics 409 Atomistilor Street 077125 Magurele Romania
| | - Anca Roseanu
- Institute of Biochemistry of the Romanian Academy 060031 Bucharest Romania
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Pelinescu D, Anastasescu M, Bratan V, Maraloiu VA, Negrila C, Mitrea D, Calderon-Moreno J, Preda S, Gîfu IC, Stan A, Ionescu R, Stoica I, Anastasescu C, Zaharescu M, Balint I. Antibacterial Activity of PVA Hydrogels Embedding Oxide Nanostructures Sensitized by Noble Metals and Ruthenium Dye. Gels 2023; 9:650. [PMID: 37623105 PMCID: PMC10454060 DOI: 10.3390/gels9080650] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Revised: 08/03/2023] [Accepted: 08/09/2023] [Indexed: 08/26/2023] Open
Abstract
Nanostructured oxides (SiO2, TiO2) were synthesized using the sol-gel method and modified with noble metal nanoparticles (Pt, Au) and ruthenium dye to enhance light harvesting and promote the photogeneration of reactive oxygen species, namely singlet oxygen (1O2) and hydroxyl radical (•OH). The resulting nanostructures were embedded in a transparent polyvinyl alcohol (PVA) hydrogel. Morphological and structural characterization of the bare and modified oxides was performed using scanning electron microscopy (SEM), transmission electron microscopy (TEM), atomic force microscopy (AFM), UV-Vis spectroscopy, and X-ray photoelectron spectroscopy (XPS). Additionally, electrokinetic potential measurements were conducted. Crystallinity data and elemental analysis of the investigated systems were obtained through X-ray diffraction and X-ray fluorescence analyses, while the chemical state of the elements was determined using XPS. The engineered materials, both as simple powders and embedded in the hydrogel, were evaluated for their ability to generate reactive oxygen species (ROS) under visible and simulated solar light irradiation to establish a correlation with their antibacterial activity against Staphylococcus aureus. The generation of singlet oxygen (1O2) by the samples under visible light exposure can be of significant importance for their potential use in biomedical applications.
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Affiliation(s)
- Diana Pelinescu
- Faculty of Biology, Intrarea Portocalilor 1–3, Sector 5, 060101 Bucharest, Romania; (D.P.); (I.S.)
| | - Mihai Anastasescu
- “Ilie Murgulescu” Institute of Physical Chemistry of the Romanian Academy, 202 Spl. Independentei, 060021 Bucharest, Romania; (M.A.); (V.B.); (D.M.); (M.Z.); (I.B.)
| | - Veronica Bratan
- “Ilie Murgulescu” Institute of Physical Chemistry of the Romanian Academy, 202 Spl. Independentei, 060021 Bucharest, Romania; (M.A.); (V.B.); (D.M.); (M.Z.); (I.B.)
| | - Valentin-Adrian Maraloiu
- National Institute of Materials Physics, 405A Atomistilor St., 077125 Magurele, Ilfov, Romania; (V.-A.M.); (C.N.)
| | - Catalin Negrila
- National Institute of Materials Physics, 405A Atomistilor St., 077125 Magurele, Ilfov, Romania; (V.-A.M.); (C.N.)
| | - Daiana Mitrea
- “Ilie Murgulescu” Institute of Physical Chemistry of the Romanian Academy, 202 Spl. Independentei, 060021 Bucharest, Romania; (M.A.); (V.B.); (D.M.); (M.Z.); (I.B.)
| | - Jose Calderon-Moreno
- “Ilie Murgulescu” Institute of Physical Chemistry of the Romanian Academy, 202 Spl. Independentei, 060021 Bucharest, Romania; (M.A.); (V.B.); (D.M.); (M.Z.); (I.B.)
| | - Silviu Preda
- “Ilie Murgulescu” Institute of Physical Chemistry of the Romanian Academy, 202 Spl. Independentei, 060021 Bucharest, Romania; (M.A.); (V.B.); (D.M.); (M.Z.); (I.B.)
| | - Ioana Catalina Gîfu
- National Institute for Research and Development in Chemistry and Petrochemistry-ICECHIM, 202 Spl. Independentei, 060021 Bucharest, Romania;
| | - Adrian Stan
- Techir Cosmetics SRL, Plantelor Str., 907015 Agigea, Romania;
| | - Robertina Ionescu
- Faculty of Biology, Intrarea Portocalilor 1–3, Sector 5, 060101 Bucharest, Romania; (D.P.); (I.S.)
| | - Ileana Stoica
- Faculty of Biology, Intrarea Portocalilor 1–3, Sector 5, 060101 Bucharest, Romania; (D.P.); (I.S.)
| | - Crina Anastasescu
- “Ilie Murgulescu” Institute of Physical Chemistry of the Romanian Academy, 202 Spl. Independentei, 060021 Bucharest, Romania; (M.A.); (V.B.); (D.M.); (M.Z.); (I.B.)
| | - Maria Zaharescu
- “Ilie Murgulescu” Institute of Physical Chemistry of the Romanian Academy, 202 Spl. Independentei, 060021 Bucharest, Romania; (M.A.); (V.B.); (D.M.); (M.Z.); (I.B.)
| | - Ioan Balint
- “Ilie Murgulescu” Institute of Physical Chemistry of the Romanian Academy, 202 Spl. Independentei, 060021 Bucharest, Romania; (M.A.); (V.B.); (D.M.); (M.Z.); (I.B.)
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Avram I, Pelinescu D, Gatea F, Ionescu R, Barcan A, Rosca R, Zanfirescu A, Vamanu E. Boletus edulis Extract-A New Modulator of Dysbiotic Microbiota. Life (Basel) 2023; 13:1481. [PMID: 37511858 PMCID: PMC10381576 DOI: 10.3390/life13071481] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [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: 05/23/2023] [Revised: 06/20/2023] [Accepted: 06/27/2023] [Indexed: 07/30/2023] Open
Abstract
The regular administration of antibiotics is a public concern due to the prejudices of large population groups and the high frequency with which antimicrobial products are prescribed. The current study aimed to evaluate the in vitro effect of a new extract from Boletus edulis (BEE) on the human microbiota. One of the disadvantages of this extensive use is the disruption of the human microbiota, leading to potential negative health consequences. The in vitro evaluation of BEE consisted in determining its cytotoxicity, influence on the concentration of four types of cytokines (IL-6, IL-10, IL-1β, TNFα), and capacity to modulate the human microbiota after administering antibiotics. The latter was assessed by microbiome analysis and the evaluation of short-chain fatty acid synthesis (SCFAs). Simultaneously, the content of total polyphenols, the antioxidant capacity, and the compositional analysis of the extract (individual polyphenols composition) were determined. The results showed that BEE modulates the microbial pattern and reduces inflammatory progression. The data demonstrated antioxidant properties correlated with the increase in synthesizing some biomarkers, such as SCFAs, which mitigated antibiotic-induced dysbiosis without using probiotic products.
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Affiliation(s)
- Ionela Avram
- Department of Genetics, University of Bucharest, 36-46 Bd. M. Kogalniceanu, 5th District, 050107 Bucharest, Romania
| | - Diana Pelinescu
- Department of Genetics, University of Bucharest, 36-46 Bd. M. Kogalniceanu, 5th District, 050107 Bucharest, Romania
| | - Florentina Gatea
- Centre of Bioanalysis, National Institute for Biological Sciences, 296 Spl. Independentei, 060031 Bucharest, Romania
| | - Robertina Ionescu
- Department of Genetics, University of Bucharest, 36-46 Bd. M. Kogalniceanu, 5th District, 050107 Bucharest, Romania
| | - Alexandru Barcan
- Faculty of Biotechnology, University of Agricultural Sciences and Veterinary Medicine, 011464 Bucharest, Romania
| | - Razvan Rosca
- Anoom Laboratories SRL, București, 28 Vintila Mihaileanu Sector 1, 024023 Bucharest, Romania
| | - Anca Zanfirescu
- Faculty of Pharmacy, "Carol Davila" University of Medicine and Pharmacy, Traian Vuia 6, 020956 Bucharest, Romania
| | - Emanuel Vamanu
- Faculty of Biotechnology, University of Agricultural Sciences and Veterinary Medicine, 011464 Bucharest, Romania
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Chifor E, Bordeianu I, Anastasescu C, Calderon-Moreno JM, Bratan V, Eftemie DI, Anastasescu M, Preda S, Plavan G, Pelinescu D, Ionescu R, Stoica I, Zaharescu M, Balint I. Bioactive Coatings Based on Nanostructured TiO 2 Modified with Noble Metal Nanoparticles and Lysozyme for Ti Dental Implants. Nanomaterials (Basel) 2022; 12:3186. [PMID: 36144974 PMCID: PMC9502567 DOI: 10.3390/nano12183186] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/21/2022] [Revised: 09/07/2022] [Accepted: 09/12/2022] [Indexed: 06/16/2023]
Abstract
This work presents the synthesis of nanostructured TiO2 modified with noble metal nanoparticles (Au, Ag) and lysozyme and coated on titanium foil. Moreover, the specific structural and functional properties of the resulting inorganic and hybrid materials were explored. The purpose of this study was to identify the key parameters for developing engineered coatings on titanium foil appropriate for efficient dental implants with intrinsic antibacterial activity. TiO2 nanoparticles obtained using the sol-gel method were deposited on Ti foil and modified with Au/Ag nanoparticles. Morphological and structural investigations (scanning electron and atomic force microscopies, X-ray diffraction, photoluminescence, and UV-Vis spectroscopies) were carried out for the characterization of the resulting inorganic coatings. In order to modify their antibacterial activity, which is essential for safe dental implants, the following aspects were investigated: (a) singlet oxygen (1O2) generation by inorganic coatings exposed to visible light irradiation; (b) the antibacterial behavior emphasized by titania-based coatings deposited on titanium foil (TiO2/Ti foil; Au-TiO2/Ti foil, Ag-TiO2/Ti foil); (c) the lysozyme bioactivity on the microbial substrate (Micrococcus lysodeicticus) after its adsorption on inorganic surfaces (Lys/TiO2/Ti foil; Lys/Au-TiO2/Ti foil, Lys/Ag-TiO2/Ti foil); (d) the enzymatic activity of the above-mentioned hybrids materials for the hydrolysis reaction of a synthetic organic substrate usually used for monitoring the lysozyme biocatalytic activity, namely, 4-Methylumbelliferyl β-D-N,N',N″-triacetylchitotrioside [4-MU-β- (GlcNAc)3]. This was evaluated by identifying the presence of a fluorescent reaction product, 7-hydroxy-4-metyl coumarin (4-methylumbelliferone).
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Affiliation(s)
- Emilian Chifor
- Faculty of Medicine of the Ovidius University, Aleea Universitatii nr.1, 900470 Constanţa, Romania
- “Strungareata” SRL, Strada Garii nr. 24, 800217 Galati, Romania
| | - Ion Bordeianu
- Faculty of Medicine of the Ovidius University, Aleea Universitatii nr.1, 900470 Constanţa, Romania
| | - Crina Anastasescu
- “Ilie Murgulescu” Institute of Physical Chemistry of the Romanian Academy, 202 Spl. Independentei, 060021 Bucharest, Romania
| | - Jose Maria Calderon-Moreno
- “Ilie Murgulescu” Institute of Physical Chemistry of the Romanian Academy, 202 Spl. Independentei, 060021 Bucharest, Romania
| | - Veronica Bratan
- “Ilie Murgulescu” Institute of Physical Chemistry of the Romanian Academy, 202 Spl. Independentei, 060021 Bucharest, Romania
| | - Diana-Ioana Eftemie
- “Ilie Murgulescu” Institute of Physical Chemistry of the Romanian Academy, 202 Spl. Independentei, 060021 Bucharest, Romania
| | - Mihai Anastasescu
- “Ilie Murgulescu” Institute of Physical Chemistry of the Romanian Academy, 202 Spl. Independentei, 060021 Bucharest, Romania
| | - Silviu Preda
- “Ilie Murgulescu” Institute of Physical Chemistry of the Romanian Academy, 202 Spl. Independentei, 060021 Bucharest, Romania
| | - Gabriel Plavan
- Faculty of Biology, “Alexandru Ioan Cuza” University, 700505 Iasi, Romania
| | - Diana Pelinescu
- Faculty of Biology, Intrarea Portocalilor 1-3, Sector 5, 060101 Bucharest, Romania
| | - Robertina Ionescu
- Faculty of Biology, Intrarea Portocalilor 1-3, Sector 5, 060101 Bucharest, Romania
| | - Ileana Stoica
- Faculty of Biology, Intrarea Portocalilor 1-3, Sector 5, 060101 Bucharest, Romania
| | - Maria Zaharescu
- “Ilie Murgulescu” Institute of Physical Chemistry of the Romanian Academy, 202 Spl. Independentei, 060021 Bucharest, Romania
| | - Ioan Balint
- “Ilie Murgulescu” Institute of Physical Chemistry of the Romanian Academy, 202 Spl. Independentei, 060021 Bucharest, Romania
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Patrinoiu G, Dumitru R, Culita DC, Munteanu C, Birjega R, Calderon-Moreno JM, Cucos A, Pelinescu D, Chifiriuc MC, Bleotu C, Carp O. Self-assembled zinc oxide hierarchical structures with enhanced antibacterial properties from stacked chain-like zinc oxalate compounds. J Colloid Interface Sci 2019; 552:258-270. [PMID: 31129297 DOI: 10.1016/j.jcis.2019.05.051] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2019] [Revised: 05/16/2019] [Accepted: 05/17/2019] [Indexed: 10/26/2022]
Abstract
Single ZnO crystallites assembled into porous hierarchical structures have been prepared by topotactic thermal decomposition of in situ obtained zinc oxalate precursors, whose synthesis involves a redox reaction between 1,2-ethanediol and nitrate ion. For the first time it was demonstrated that post-synthesis protocols of the precursors (e.g. ultrasound irradiation, hydrolytic decomposition) master the hydrogen bonds formed between oxalate chains, allowing that way the adjustment of materials properties (morphology, porosity and optical) and a rational introduction of different dopants (Eu3+/Er3+). The ZnO surface reactivity is confirmed by the significant biocidal activity of the obtained materials against Gram-positive and Gram-negative planktonic and biofilm-embedded cells, superior to those reported in the literature for other ZnO-based materials or antibiotics, associated also with a good biocompatibility.
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Affiliation(s)
- Greta Patrinoiu
- "Ilie Murgulescu" Institute of Physical Chemistry, Romanian Academy, Spl. Independentei 202, 060021 Bucharest, Romania
| | - Raluca Dumitru
- Faculty for Industrial Chemistry and Environmental Engineering, University "Politehnica" of Timisoara, Piata Victoria, 30006 Timisoara, Romania
| | - Dana C Culita
- "Ilie Murgulescu" Institute of Physical Chemistry, Romanian Academy, Spl. Independentei 202, 060021 Bucharest, Romania
| | - Cornel Munteanu
- "Ilie Murgulescu" Institute of Physical Chemistry, Romanian Academy, Spl. Independentei 202, 060021 Bucharest, Romania
| | - Ruxandra Birjega
- National Institute for Lasers, Plasma and Radiation Physics, Atomistilor 409, PO-Box MG-36, 077125 Magurele, Romania
| | - José M Calderon-Moreno
- "Ilie Murgulescu" Institute of Physical Chemistry, Romanian Academy, Spl. Independentei 202, 060021 Bucharest, Romania
| | - Andrei Cucos
- National Institute for Research and Development in Electrical Engineering, ICPE-CA, Advanced Research, Splaiul Unirii 313, 030138 Bucharest, Romania
| | - Diana Pelinescu
- University of Bucharest, Faculty of Biology, Microbiology Department, 1-3 Portocalilor Way and The Research Institute of the University of Bucharest, ICUB, Spl. Independentei 91-95, Bucharest, Romania
| | - Mariana C Chifiriuc
- University of Bucharest, Faculty of Biology, Microbiology Department, 1-3 Portocalilor Way and The Research Institute of the University of Bucharest, ICUB, Spl. Independentei 91-95, Bucharest, Romania
| | - Coralia Bleotu
- "St. S. Nicolau" Institute of Virology, 285, Sos. Mihai Bravu, Bucharest 030304, Romania
| | - Oana Carp
- "Ilie Murgulescu" Institute of Physical Chemistry, Romanian Academy, Spl. Independentei 202, 060021 Bucharest, Romania.
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Petrut S, Rusu E, Tudorache IS, Pelinescu D, Sarbu I, Stoica I, Vassu T. Influence of Various Carbon Sources on Growth and Biomass Accumulation of Some Lactic Acid Bacteria Strains. Rev Chim 2019. [DOI: 10.37358/rc.19.7.7356] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Lactic acid bacteria (LAB) are among the most important group of bacteria, with a critical role in food, pharmaceutical and medical industry. The fast-growing characteristics of LAB strains, their metabolic activity associated with production of many beneficial compounds and most of all, their GRAS status (Generally Recognized As Safe) recommends them as starter cultures for food biotechnology processes. During last decades, LAB strains have also an extensive prophylactic or therapeutic use as probiotics. Due to the fact that there are current limitations in the use of standard MRS media (de Man Rogosa Sharpe), which is selective especially for lactobacilli and enterococci, the aim of the present study was to optimize the growth medium composition for isolating a wide range of LAB strains with biotechnological potential and to improve the biomass accumulation. For this purpose, it has been evaluated the growth of Lactobacillus (L.) rhamnosus ATCC� 9595�, Streptococcus (S.) salivarius subsp. thermophilus ATCC� 19258�, Pediococcus (P.) acidilactici ATCC� 8042�, Lactococcus (L.) lactis 28 and Enterococcus (E.) faecium FFb CMGB L-18 on MRS broth with various carbon sources (glucose, lactose, galactose, maltose, mannose, ribose, arabinose, sucrose, fructose). The results of the study showed that there are interesting differences in the requirements of each analyzed species. The optimization of standard medium composition will be very useful for growth studies as well as metabolic flux studies.
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Petrut SM, Sarbu I, Corbu VM, Pelinescu D, Csutak O, Vassu T. Screening of lactic acid bacteria strains with biotechnological properties, isolated from traditional Romanian fermented foods. J Biotechnol 2018. [DOI: 10.1016/j.jbiotec.2018.06.197] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Vamanu E, Pelinescu D, Avram I. Antioxidative Effects of Phenolic Compounds of Mushroom Mycelia in Simulated Regions of the Human Colon, In Vitro Study. POL J FOOD NUTR SCI 2018. [DOI: 10.1515/pjfns-2017-0010] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Sarbu I, Vassu T, Chifiriuc MC, Bucur M, Stoica I, Stefana P, Rusu E, Moldovan H, Pelinescu D. Assessment the Activity of Some Enzymes and Antibiotic Substances Sensitivity on Pathogenic Bacteria Species. Rev Chim 2018. [DOI: 10.37358/rc.17.12.6029] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Microbial and opportunistic pathogens cause serious problem to human host by releasing different compounds which are involved in colonization, invasion or in alteration of immune process. In this study we propose ourselves to analyze the virulence profile of microorganisms involved in urinary tract infections and bacterial vaginosis in order to compare the virulence mechanisms developed by these microorganisms. We assessed the virulence profile (motility, adhesion to HeLa cell line, biofilm formation, production of enzymes, antibiotic susceptibility) using phenotypic methods. The microbial strains isolated from urinary tract infections present a high ability to release amylases, caseinase, siderophore-like, half of them have present high motility and also were highly resistant to antibiotics, while the microbial strains isolated from bacterial vaginosis present a high ability to bind human epithelial cells and to release hemolyzin and DN-ase.
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Rusu E, Sarbu I, Mitache M, Moldovan H, Biris CI, Vassu T, Pelinescu D. Ultrastructural Changes of Candida albicans Species Induced by the Presence of Sodium Diclofenac. Rev Chim 2017. [DOI: 10.37358/rc.17.11.5929] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
The high frequency of occurrence of candidiasis as well as high mortality of patients with immunosuppression cause a tendency toward better understanding of Candida albicans species virulence factors and developing sensitive and specific diagnostic methods, and appropriate strategies of candidiasis treatment. In recent decades the incidence of fungal infections has alarming increases because of advanced medical treatments. In this study was analyzed possible ultrastructural changes of the species C. albicans cells following treatment with sodium diclofenac at various concentrations. Following treatment of C. albicans cells with sodium diclofenac 1 mM and 2 mM changes in the plasmalemma can be noticed, changes in the density of cell wall, disruption and necrotic appearance of the cytoplasm.
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Vamanu E, Pelinescu D. Effects of mushroom consumption on the microbiota of different target groups – Impact of polyphenolic composition and mitigation on the microbiome fingerprint. Lebensm Wiss Technol 2017. [DOI: 10.1016/j.lwt.2017.07.039] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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Abstract
Diabetes and cardiovascular diseases are major causes of morbidity and mortality worldwide, and are associated with changes in the human gut microbiota. To better understand the relationships between diet, disease, and the colonic microbiome, we used the in vitro GIS1 system and repetitive element palindromic polymerase chain reaction (rep-PCR) to determine the microbial fingerprints in individuals with these diseases and compared them with the fingerprints in healthy controls. Clear differences were apparent in the three groups. The diabetes group showed significantly increased aerobic bacteria, increased coliforms, and reduced bifidobacteria; the balance between beneficial and pathogenic bacteria was disturbed; significant numbers of clostridia were present; and the proportions of various major bacterial groups were unstable through the length of the colon. The microbiota of the cardiovascular group had high numbers of beneficial strains and more closely resembled the control microbiota. Different patterns of lactic acid bacteria were observed in the three groups, and there was a direct link between the presence of lactate and the colonic pH. Ammonium, a microbial metabolite associated with colonic cancer, was associated with consistently high levels of Gram-positive bacteria in the diabetic patients. In the cardiovascular patients and controls, each colonic segment showed a distinct microbial fingerprint, whereas in the diabetics, the same rep-PCR profile occurred in all three segments. The diversity of beneficial bacteria was reduced in patients with a nutritional or cardiovascular disease. Both diabetes and cardiovascular disease are associated with changes in the colonic microbial fingerprint. This study of microbial microbiota fingerprint modification has direct applicability in medical practice.
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Affiliation(s)
- Emanuel Vamanu
- 1 Faculty of Biotechnology, University of Agronomic Science and Veterinary Medicine , Bucharest, Romania
| | - Diana Pelinescu
- 2 Department of Genetics, Faculty of Biology, University of Bucharest , Bucharest, Romania
| | - Ionela Sarbu
- 2 Department of Genetics, Faculty of Biology, University of Bucharest , Bucharest, Romania
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Sârbu I, Vassu T, Stoica I, Chifiriuc C, Bucur M, Rusu E, Ionescu R, Pelinescu D. Analysis on the antimicrobial activity of some lactic acid bacteria strains. Ro J Infect Dis 2015. [DOI: 10.37897/rjid.2015.2-3.6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Objective. The main objective of this study was to select lactic acid bacteria strains with antimicrobial activity and to identify and characterize the antimicrobial compounds. Methods. In this study we tested the antimicrobial activity of 153 lactic bacteria strains by disk diffusion method against 6 microbial pathogenic strains isolated from patients with urinary and vaginal infections. Results. Antimicrobial test results revealed that most of lactic acid bacteria strains exhibited high antimicrobial activity against pathogenic microorganisms. For most of lactic bacteria strains antimicrobial activity has been correlated with the production of organic acids and only for two strains with the biosynthesis of bacteriocins. Bacteriocin produced by Lactococcus (Lc.) lactis F2a strain presented a broad spectrum of activity and high activity (51,200 AU/ml) compared with bacteriocins isolated from Lactobacillus (Lb.) paracasei ssp. paracasei JR strain (400 AU/ml). The stability tests of bacteriocin revealed that the bacteriocin produced by Lc. lactis F2a strain, it is stable at acid pH while exposure for long time to 600C causes a drastic decrease in bacteriocin activity. Conclusions. Lactic bacteria strains showed a high antimicrobial activity against both prokaryotic and eukaryotic pathogen strains. Two bacterial strains have bacteriocins. Bacteriocins isolated from Lc. lactis F2a strain showed a high activity and a broad spectrum of action.
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Rusu E, Cojocaru M, Cristescu C, Avram I, Pelinescu D. Assessment of antimicrobian effect of certain lactic acid bacteria species. Ro J Infect Dis 2015. [DOI: 10.37897/rjid.2015.1.3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
At the gastrointestinal tract level there is a balance between microbiota and the digestive tract which has as effect differentiation of pathogenic bacteria commensal species. Lately, due to the development of new therapies and use of a wide spectrum antimicrobian compounds we can notice an increase in the number of opportunistic infections caused by potentially pathogenic bacterial and fungal strains. Lactic acid bacteria produce compounds with antimicrobian action, such as hydrogen peroxide, diacetyl, acetaldehyde, D-amino acids isomers, reutin and bacteriocines. The use of probiotics can represent a supplementary alternative for increasing and maintaining the well-being of the human body.
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Rusu E, Radu-Popescu M, Pelinescu D, Vassu T. Treatment with some anti-inflammatory drugs reduces germ tube formation in Candida albicans strains. Braz J Microbiol 2015; 45:1379-83. [PMID: 25763044 PMCID: PMC4323313 DOI: 10.1590/s1517-83822014000400031] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [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: 06/11/2013] [Accepted: 04/17/2014] [Indexed: 01/19/2023] Open
Abstract
Candida albicans is an opportunistic dimorphic fungus that inhabits various host mucosal sites. It can cause both superficial and serious systemic disease. Conversion from the yeast to the hyphal form has been associated with increased virulence and mucosal invasiveness. The aim of this study was to investigate the effect of sodium diclofenac and aspirin on germs tube formation of different Candida albicans strains. Prostaglandins may play an important role in fungal colonization. Nonsteroidal anti-inflammatory drugs are inhibitors of the cyclooxygenase isoenzymes. These drugs specifically block the biosynthesis of mammalian prostaglandins by inhibiting one or both of cyclooxygenase isoenzymes. In tests for germ tube formation sodium diclofenac reduced the filamentation to the 12.5%- 5.1%. In the presence of aspirin the filamentation was reduced up to 85–45% depending on the tested strain. Our results suggest that cyclooxygenase-depending synthesis of fungal prostaglandins is important for morphogenesis and fungal virulence. Inhibitors of cyclooxygenase isoensymes (aspirin and diclofenac) are effective in decreasing germ tube formation of Candida albicans.
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Affiliation(s)
- Elena Rusu
- Preclinical Department Faculty of Medicine Titu Maiorescu University Bucharest Romania Preclinical Department, Faculty of Medicine, Titu Maiorescu University, Bucharest, Romania
| | - Manuela Radu-Popescu
- Department of Microbiology Faculty of Pharmacy University of Medicine and Pharmacy Carol Davila Bucharest Romania Department of Microbiology, Faculty of Pharmacy, University of Medicine and Pharmacy Carol Davila, Bucharest, Romania
| | - Diana Pelinescu
- Center for Research, Training & Consulting in Microbiology, Genetics and Biotechnology, Faculty of Biology University of Bucharest Romania Center for Research, Training & Consulting in Microbiology, Genetics and Biotechnology, Faculty of Biology, University of Bucharest, Romania
| | - Tatiana Vassu
- Center for Research, Training & Consulting in Microbiology, Genetics and Biotechnology, Faculty of Biology University of Bucharest Romania Center for Research, Training & Consulting in Microbiology, Genetics and Biotechnology, Faculty of Biology, University of Bucharest, Romania
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Taranu I, Marin DE, Pistol GC, Motiu M, Pelinescu D. Induction of pro-inflammatory gene expression by Escherichia coli and mycotoxin zearalenone contamination and protection by a Lactobacillus mixture in porcine IPEC-1 cells. Toxicon 2015; 97:53-63. [PMID: 25640651 DOI: 10.1016/j.toxicon.2015.01.016] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2014] [Revised: 01/21/2015] [Accepted: 01/28/2015] [Indexed: 01/26/2023]
Abstract
This work investigated the effect of Escherichia coli K88 and zearalenone contamination on pro-inflammatory gene expression (Toll like receptors, cytokines) and signalling molecules and the protective activity of a mixture of Lactobacilli sp. (Lactobacillus plantarum, Lactobacillus acidofilus and Lactobacillus paracasei) in porcine intestinal epithelial cells as part of the local immune system. IPEC-1 cell monolayer was exposed for 1 h to the individual or combined action of E. coli, zearalenone and lactobacilli mixture. Our results showed that TLRs (1-10) and cytokine (IL-1,-6,-8,-10, TNF-α, IFN-γ) genes expressed early (after 1 h of culture) in IPEC-1 cells. E. coli alone increased the TLRs mRNA expression, especially TLR4 and the inflammatory cytokines while ZEA alone showed either no effect or a marginally effect on TLRs, cytokines, and signalling genes when compared to untreated cells. The combined actions of the two contaminants lead to a synergistically up-regulation of key cytokines (IFN-γ, IL-10 and TNF-α) and TLRs (-2,-3,-4,-6, and -10). The live lactobacilli mixture was able to attenuate the pathogen and mycotoxin-induced response by downregulated the majority of inflammatory related genes suggesting that this mixture has an immunomodulatory potential and may be used to lower the inflammatory response.
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Affiliation(s)
- Ionelia Taranu
- Laboratory of Animal Biology, National Research and Development Institute for Biology and Animal Nutrition, Calea Bucuresti No. 1, Balotesti, Ilfov 077015, Romania.
| | - Daniela Eliza Marin
- Laboratory of Animal Biology, National Research and Development Institute for Biology and Animal Nutrition, Calea Bucuresti No. 1, Balotesti, Ilfov 077015, Romania
| | - Gina Cecilia Pistol
- Laboratory of Animal Biology, National Research and Development Institute for Biology and Animal Nutrition, Calea Bucuresti No. 1, Balotesti, Ilfov 077015, Romania
| | - Monica Motiu
- Laboratory of Animal Biology, National Research and Development Institute for Biology and Animal Nutrition, Calea Bucuresti No. 1, Balotesti, Ilfov 077015, Romania
| | - Diana Pelinescu
- Department of Genetics, Biology Faculty, University of Bucharest, Intr. Portocalelor, No. 1-3, Sect. 6, Bucharest 060101, Romania
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Ditu LM, Chifiriuc MC, Bezirtzoglou E, Marutescu L, Bleotu C, Pelinescu D, Mihaescu G, Lazar V. Immunomodulatory effect of non-viable components of probiotic culture stimulated with heat-inactivated Escherichia coli and Bacillus cereus on holoxenic mice. Microb Ecol Health Dis 2014; 25:23239. [PMID: 25317114 PMCID: PMC4172693 DOI: 10.3402/mehd.v25.23239] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/31/2013] [Revised: 05/05/2014] [Accepted: 06/16/2014] [Indexed: 12/31/2022]
Abstract
Background Competition of probiotic bacteria with other species from the intestinal microbiota involves different mechanisms that occur regardless of probiotics’ viability. The objective of this paper was to assess the cytokine serum levels in holoxenic mice after oral administration of non-viable components (NVC) of Enterococcus faecium probiotic culture stimulated with heat-inactivated Escherichia coli and Bacillus cereus in comparison to NVC of unstimulated E. faecium probiotic culture. Methods Probiotic E. faecium CMGb 16 culture, grown in the presence of heat-inactivated cultures of E. coli and B. cereus CMGB 102, was subsequently separated into supernatant (SN) and heat-inactivated cellular sediment (CS) fractions by centrifugation. Each NVC was orally administered to holoxenic mice (balb C mouse strain), in three doses, given at 24 hours. Blood samples were collected from the retinal artery, at 7, 14, and 21 days after the first administration of the NVC. The serum concentrations of IL-12 and tumor necrosis factor-alpha (TNF-α) interleukins were assessed by ELISA method. Results After the oral administration of SN component obtained from the probiotic culture stimulated with heat-inactivated cultures of B. cereus CMGB 102 and E. coli O28, the serum concentrations of IL-12 were maintained higher in the samples collected at 7 and 14 days post-administration. No specific TNF-α profile could be established, depending on stimulated or non-stimulated probiotic culture, NVC fraction, or harvesting time. Conclusion The obtained results demonstrate that non-viable fractions of probiotic bacteria, stimulated by other bacterial species, could induce immunostimulatory effects mediated by cytokines and act, therefore, as immunological adjuvants.
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Affiliation(s)
- L M Ditu
- Microbiology Department, Faculty of Biology, University of Bucharest, Bucharest, Romania
| | - M C Chifiriuc
- Microbiology Department, Faculty of Biology, University of Bucharest, Bucharest, Romania
| | - E Bezirtzoglou
- Laboratory of Microbiology, Biotechnology and Hygiene, Department of Food Science and Technology, Faculty of Agricultural Development, Democritus University of Thrace, Orestiada, Greece
| | - L Marutescu
- Microbiology Department, Faculty of Biology, University of Bucharest, Bucharest, Romania
| | - C Bleotu
- Institute of Virology 'St. Nicolau', Bucharest, Romania
| | - D Pelinescu
- Microbiology Department, Faculty of Biology, University of Bucharest, Bucharest, Romania
| | - G Mihaescu
- Microbiology Department, Faculty of Biology, University of Bucharest, Bucharest, Romania
| | - V Lazar
- Microbiology Department, Faculty of Biology, University of Bucharest, Bucharest, Romania
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Ditu LM, Chifiriuc M, Pelinescu D, Avram I, Pircalabioru G, Mihaescu G. Class I and II Bacteriocins: Structure, Biosynthesis and Drug Delivery Systems for the Improvement of their Antimicrobial Activity. CURR PROTEOMICS 2014. [DOI: 10.2174/157016461102140917122421] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Vamanu E, Sarbu I, Nedelcu I, Pelinescu D. Study of PROEXO product influence on infant microbiota in an in vitro colonic fermentation system. ANN MICROBIOL 2014. [DOI: 10.1007/s13213-014-0947-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
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Sârbu I, Pelinescu D, Stoica I, Măruţescu L, Vassu T. Phenotypic profiles of virulence in different Candida species isolated from vulvovaginal infections. Roum Arch Microbiol Immunol 2013; 72:225-233. [PMID: 24923105] [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: 06/03/2023]
Abstract
In order to establish an infection, pathogenic microorganisms have to colonize, survive, multiply, evade the immune system and spread to other tissues [1, 2, 3]. Although some Candida species are normally commensal in humans, in the last decades the frequency and the severity of nosocomial diseases due to Candida strains have increased dramatically [4]. The aim of the present study was to characterize some Candida strains isolated from vulvovaginal infections by determining the virulence and pathogenicity profile. The assessment of the in vitro expression of virulence cell wall associated factors (hyphal formation, adherence to HeLa cell line, biofilm development), soluble secreted enzymes (aspartyl protease, lipase, phospholipase, DN-ase) and Fe3+ accumulation was achieved by phenotypic methods on 13 yeast strains belonging to five Candida (C.) species (C. albicans, C. krusei, C. parapsilopsis, C. catenulata and C. kefyr). Candida sp. strains isolated from vulvovaginal infections showed species/ strain specific virulence profile.
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Ioana Cotar A, Ionescu B, Pelinescu D, Voidarou C, Lazar V, Bezirtzoglou E, Carmen Chifiriuc M. Current Solutions for the Interception of Quorum Sensing in Staphylococcus aureus. CURR ORG CHEM 2013. [DOI: 10.2174/1385272811317020004] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Vamanu E, Pelinescu D, Avram I, Niță S, Vamanu A. Study of PROBAC product influence on infant microbiota in a single-chamber colonic fermentation model GIS1. ANN MICROBIOL 2012. [DOI: 10.1007/s13213-012-0558-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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Vamanu E, Pelinescu D, Marin I, Vamanu A. Study of probiotic strains viability from PROBAC product in a single chamber gastrointestinal tract simulator. Food Sci Biotechnol 2012. [DOI: 10.1007/s10068-012-0128-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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Vamanu E, Vamanu A, Pelinescu D, Niţă S, Rusu N, Popa N. Influence of the culture medium composition on the exopolysaccharides synthesis byStreptococcussp. IL5 strain. Acta Alimentaria 2012. [DOI: 10.1556/aalim.41.2012.1.13] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Cotar AI, Chifiriuc MC, Dinu S, Pelinescu D, Banu O, Lazăr V. Quantitative real-time PCR study of the influence of probiotic culture soluble fraction on the expression of Pseudomonas aeruginosa quorum sensing genes. Roum Arch Microbiol Immunol 2010; 69:213-223. [PMID: 21462836] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
The opportunistic pathogen Pseudomonas (Ps.) aeruginosa causes severe infections, particularly in immunocompromised individuals and patients with cystic fibrosis (CF). A serious side effect of antibiotic therapy in Ps. aeruginosa infections is the development of resistance to antibiotics. During the infection process Ps. aeruginosa forms biofilms, rendering bacterial cells more resistant to disinfectants, antibiotics and the action of host immune defense effectors. Pseudomonas aeruginosa employs the intercellular communication system, known as quorum sensing (QS) to coordinate the expression of tissue-damaging factors. Since the QS systems controls the production of different virulence factors, it is possible that the inhibition of its regulatory activity to severely compromise the ability of Ps. aeruginosa to cause infections in humans. Many studies have shown that some probiotic strains exhibit inhibitory activity on different virulence properties of pathogenic bacteria (adherence to cellular or inert substrate, soluble virulence factors expression). The aim of the present study was to investigate by real-time RT-qPCR the influence of probiotic culture soluble factors on the QS genes expression in 30 Ps. aeruginosa strains isolated from patients hospitalized in the National Institute for Cardiovascular Infections, Prof. C.C. Iliescu Fundeni Hospital, Bucharest. The results of the real time RT-qPCR have shown that in all Ps. aeruginosa strains grown in the presence of probiotic culture sterile filtrates, the level of QS genes expression was reduced comparatively with those from control cultures. In conclusion, these results proved that the inhibition of virulence factors regulation mechanisms by soluble molecules secreted by probiotics could represent an interesting way pathogenicity and virulence attenuation in Ps. aeruginosa nosocomial strains.
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Affiliation(s)
- Ani Ioana Cotar
- National Institute for Research and Development in Microbiology and Immunology Cantacuzino, Bucharest, Romania.
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Vamanu E, Vamanu A, Popa O, Vassu T, Ghindea R, Pelinescu D, Nita S, Babeanu N. Effect of the yeast and bacteria biomass on the microbiota in the rumen. Pak J Biol Sci 2008; 11:2217-2223. [PMID: 19137830 DOI: 10.3923/pjbs.2008.2217.2223] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
This study aims at obtaining a probiotic product based on viable biomass from 6 yeast strains and 2 strains of lactic bacteria used for nutrition of animals. The strains are subjected to some resistance tests, at temperature, pH, pepsin, pancreatin and biliary salts so as to make obvious their viability. Tests were done by comparison to the witness strain and respectively a protective solution based on mucin and casein. Based on the resulted viabilities 2 products are formulated. Their effect is tested by inoculating fresh rumen content and supervising the microbic balance for a period of 12 days. After the final tests, it resulted that the product Fpl (20% Saccharomyces cerevisiae 1-29, 10% Kluyveromyces marxianus R-CS, 20% Issatchenkia orientalis R-BC, 30% Lactobacillus paracasei CMGB16, 20% Enterococcus faecium GM8) was chosen because anaerobic strains were preponderant as a consequence of the tests performed with rumen.
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Affiliation(s)
- E Vamanu
- Faculty of Biotechnology, University of Agronomic Sciences and Veterinary Medicine, Bd. Mar ti No. 59, District 1, Bucharest, Romania
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Ghindea R, Csutak O, Stoica I, Ionescu R, Soare S, Pelinescu D, Nohit AM, Creangă O, Vassu T. [Molecular taxonomy techniques used for yeast identification]. Bacteriol Virusol Parazitol Epidemiol 2004; 49:105-13. [PMID: 16938931] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Due to the major impact of yeasts in human life based on the existence of pathogen yeast species and of species with biotechnological abilities, in the last few years new molecular techniques are performed for an accurate identification of natural isolates. Our study is aimed to review some of these techniques such as electrokariotyping by PFGE (Pulsed Field Gel Electrophoresis), estimation of the molar percentage of guanine and cytosine, the applications of PCR reaction in yeast identification using RAPD (Random amplified polymorphic DNA), UP-PCR (Universally Primed Polymerase Chain Reaction), MLST (Multilocus sequence typing) techniques, mtDNA and rDNA homology studies. Such molecular techniques complete the phenotypical characterization based on classical taxonomical tests allowing thus the polyphasic identification of the microorganisms.
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Affiliation(s)
- Raluca Ghindea
- Universitatea Bucureşti, Facultatea de Biologie, Centrul de Cercetare, Formare şi Consultanţă in Microbiologie, Genetică şi Biotehnologie
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