1
|
Ciandrini E, Morroni G, Cirioni O, Kamysz W, Kamysz E, Brescini L, Baffone W, Campana R. Synergistic combinations of antimicrobial peptides against biofilms of methicillin-resistant Staphylococcus aureus (MRSA) on polystyrene and medical devices. J Glob Antimicrob Resist 2019; 21:203-210. [PMID: 31678322 DOI: 10.1016/j.jgar.2019.10.022] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [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: 04/03/2019] [Revised: 10/10/2019] [Accepted: 10/21/2019] [Indexed: 11/17/2022] Open
Abstract
OBJECTIVES Antimicrobial research is being focused to look for more effective therapeutics against antibiotic-resistant infections such as those caused by methicillin-resistant Staphylococcus aureus (MRSA). In this regard, antimicrobial peptides (AMPs) appear to be a promising solution. The aim of the present study was to investigate the potential activity of temporin A, citropin 1.1, CA(1-7)M(2-9)NH2 and Pal-KGK-NH2 in synergistic activity against MRSA biofilms developed on polystyrene surface (PSS) and central venous catheter (CVC). METHODS The study was subdivided into distinct phases to assess the ability of AMPs to inhibit biofilm formation, to identify possible synergy between AMPs, and to eradicate preformed biofilms on PSS and CVC using AMPs alone or in combination. RESULTS Activity of the AMPs was particularly evident in the inhibition of biofilm formation on PSS and CVC, whilst the eradication of preformed biofilms was more difficult and was reached only after 24h of contact. The synergistic activity of AMP combinations, selected by their fractional inhibitory concentration index (FICI), led to an improvement in the performance of all of the molecules in the removal of different biofilms. CONCLUSION Overall, AMPs could represent the next generation of antimicrobial agents for a prophylactic or therapeutic tool to control biofilms of antibiotic-resistant bacteria and/or biofilm-associated infections on different medical devices.
Collapse
Affiliation(s)
- Eleonora Ciandrini
- Department of Biomolecular Science, Division of Toxicological, Hygiene and Environmental Science, University of Urbino Carlo Bo, Via S. Chiara 27, 61029 Urbino, Italy
| | - Gianluca Morroni
- Infectious Diseases Clinic, Department of Biomedical Sciences and Public Health, Polytechnic University of Marche, Ancona, Italy
| | - Oscar Cirioni
- Infectious Diseases Clinic, Department of Biomedical Sciences and Public Health, Polytechnic University of Marche, Ancona, Italy
| | - Wojciech Kamysz
- Faculty of Pharmacy, Medical University of Gdansk, Gdansk, Poland
| | | | - Lucia Brescini
- Infectious Diseases Clinic, Department of Biomedical Sciences and Public Health, Polytechnic University of Marche, Ancona, Italy
| | - Wally Baffone
- Department of Biomolecular Science, Division of Toxicological, Hygiene and Environmental Science, University of Urbino Carlo Bo, Via S. Chiara 27, 61029 Urbino, Italy
| | - Raffaella Campana
- Department of Biomolecular Science, Division of Toxicological, Hygiene and Environmental Science, University of Urbino Carlo Bo, Via S. Chiara 27, 61029 Urbino, Italy.
| |
Collapse
|
2
|
Ciandrini E, Morroni G, Arzeni D, Kamysz W, Neubauer D, Kamysz E, Cirioni O, Brescini L, Baffone W, Campana R. Antimicrobial Activity of Different Antimicrobial Peptides (AMPs) Against Clinical Methicillin-resistant Staphylococcus aureus (MRSA). Curr Top Med Chem 2019; 18:2116-2126. [PMID: 30345920 DOI: 10.2174/1568026618666181022140348] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [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: 07/03/2018] [Revised: 09/21/2018] [Accepted: 10/25/2018] [Indexed: 11/22/2022]
Abstract
BACKGROUND Antimicrobial research is being focused to look for more effective therapeutics against antibiotic-resistant infections caused by methicillin-resistant Staphylococcus aureus (MRSA). In this direction, antimicrobial peptides (AMP) appear as promising tool. OBJECTIVES This study evaluated the antimicrobial activity of different AMPs (Citropin 1.1, Temporin A, Pexiganan, CA(1-7)M(2-9)NH2, Pal-KGK-NH2, Pal-KKKK-NH2, LL-37) against human MRSA clinical isolates. METHODS The Minimum Inhibitory Concentration (MIC) was assessed for each AMP; then, the most active ones (Citropin 1.1, Temporin A, CA(1-7)M(2-9)NH2 and Pal-KGK-NH2) were tested against selected MRSA strains by time-kill studies. RESULTS The lowest MIC value was observed for Pal-KGK-NH2 (1 µg/ml), followed by Temporin A (4- 16 µg/ml), CA(1-7)M(2-9)NH2 (8-16 µg/ml) and Citropin 1.1 (16-64 µg/ml), while higher MICs were evidenced for LL-37, Pexiganan and Pal-KKKK-NH2 (> 128 µg/ml). In time-kill experiments, Citropin 1.1 and CA(1-7)M(2-9)NH2 showed a relatively high percentage of growth inhibition (>30 %) for all the tested MRSA clinical isolates, with a dose-dependent activity resulting in the highest percentage of bacterial growth inhibition (89.39%) at 2MIC concentration. CONCLUSION Overall, our data demonstrated the potential of some AMPs against MRSA isolates, such as Citropin 1.1 and CA(1-7)M(2-9)NH2, that represents a promising area of development for different clinical applications.
Collapse
Affiliation(s)
- Eleonora Ciandrini
- Department of Translational Research and New Technologies in Medicine and Surgery, University of Pisa, Pisa, Italy
| | - Gianluca Morroni
- Infectious Disease Clinic, Department of Biomedical Sciences and Public Health, Polytechnic University of Marche, Ancona, Italy
| | - Daniela Arzeni
- Infectious Disease Clinic, Department of Biomedical Sciences and Public Health, Polytechnic University of Marche, Ancona, Italy
| | - Wojciech Kamysz
- Faculty of Pharmacy, Department of Inorganic Chemistry, Medical University of Gdansk, Gdansk, Poland
| | - Damian Neubauer
- Faculty of Pharmacy, Department of Inorganic Chemistry, Medical University of Gdansk, Gdansk, Poland
| | - Elzbieta Kamysz
- Faculty of Chemistry, Department of Molecular Biotechnology, University of Gdansk, Gdansk, Poland
| | - Oscar Cirioni
- Infectious Disease Clinic, Department of Biomedical Sciences and Public Health, Polytechnic University of Marche, Ancona, Italy
| | - Lucia Brescini
- Infectious Disease Clinic, Department of Biomedical Sciences and Public Health, Polytechnic University of Marche, Ancona, Italy
| | - Wally Baffone
- Department of Biomolecular Sciences, Division of Toxicological, Hygiene and Environmental Sciences, University of Urbino Carlo Bo, Urbino, Italy
| | - Raffaella Campana
- Department of Biomolecular Sciences, Division of Toxicological, Hygiene and Environmental Sciences, University of Urbino Carlo Bo, Urbino, Italy
| |
Collapse
|
3
|
Campana R, Ciandrini E, Baffone W. Experimental approach for a possible integrated protocol to determine sanitizer activity against both planktonic bacteria and related biofilms. Food Res Int 2018; 111:472-479. [PMID: 30007709 DOI: 10.1016/j.foodres.2018.05.067] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [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: 01/23/2018] [Revised: 04/24/2018] [Accepted: 05/28/2018] [Indexed: 01/01/2023]
Abstract
The persistence of pathogenic bacteria in industrial settings is linked to biofilm embedded bacteria resistance to antimicrobial and disinfectant methods effective against planktonic cells. We proposed an experimental approach to evaluate sanitizers effectiveness against both planktonic microorganisms and related biofilms as possible integration of the official EN 1276 procedure. Firstly, the efficacy of three chemicals sanitizers was tested on planktonic cells of Escherichia coli O157:H7 ATCC 35150, Staphylococcus aureus ATCC 43387, Pseudomonas aeruginosa ATCC 9027, Enterococcus faecalis ATCC 29212 and Candida albicans ATCC 14053 using the suspension test indicated by EN 1276 in both dirty and clear simulated conditions (0.3% or 0.03% of bovine serum albumen). The sanitizers were tested against the related biofilms developed on stainless steel for 48 h at room temperature. The sanitizers (SANI 626, SUPERIG, IGIEN 155) reached 5-logarithmic reduction at the manufacture's recommended concentrations after 30 s and 5 min against planktonic microorganisms but, sometimes, the organic load interfered with their activity. The same concentrations tested with the proposed protocol weren't effective against biofilms and a log reduction >3 was reached using higher concentrations of the sanitizers and 15 min of contact, with the exception of IGIEN 155. The efficacy of a disinfectant/sanitizer is assessed against planktonic microorganisms and bacteria adhered to surface, while those embedded in biofilms are not taken into consideration. The proposed protocol could be used to evaluate the effectiveness of a sanitizer also against microorganisms organized in biofilms, in order to give to the users more detailed information on its activity.
Collapse
Affiliation(s)
- Raffaella Campana
- Department of Biomolecular Science, Division of Toxicological, Hygiene and Environmental Science, University of Urbino Carlo Bo, Urbino, Italy.
| | - Eleonora Ciandrini
- Department of Translational Research and New Technologies in Medicine and Surgery, University of Pisa, Italy
| | - Wally Baffone
- Department of Biomolecular Science, Division of Toxicological, Hygiene and Environmental Science, University of Urbino Carlo Bo, Urbino, Italy
| |
Collapse
|
4
|
Federici S, Serrazanetti DI, Guerzoni ME, Campana R, Ciandrini E, Baffone W, Gianotti A. Development of a rapid PCR protocol to detect Vibrio parahaemolyticus in clams. J Food Sci Technol 2017; 55:749-759. [PMID: 29391640 DOI: 10.1007/s13197-017-2986-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Revised: 12/06/2017] [Accepted: 12/07/2017] [Indexed: 11/25/2022]
Abstract
Vibrio parahaemolyticus is part of the natural microflora of estuarine and coastal marine waters and can be also present in seafood, especially shellfish and bivalve molluscs. In this study we compared the reference cultural method ISO 6887-3 with two molecular methods, multiplex PCR and real-time PCR, for the detection of two distinct genetic markers (tlh species-specific gene and tdh virulence gene) of V. parahaemolyticus in bivalve mollusc. The analyses were performed on clams inoculated with V. parahaemolyticus ATCC 43996 at T0 and after a 3 and 6 h of pre-enrichment in alkaline saline peptone water. Counts on agar plates were largely inaccurate, probably due to other Vibrio species grown on the TCBS selective agar. Multiplex PCR assays, performed using primers pairs for tdh and tlh genes, showed a detection limit of 104 CFU/g of shell stock within 6 h of pre-enrichment, respecting however the action level indicated by the National Seafood Sanitation Program guideline. Detection by tdh gene in real-time PCR reached the definitely highest sensitivity in shorter times, 101 CFU/g after 3 h of pre-enrichment, while the sensitivity for the tlh gene was not promising, detecting between 105 and 106 CFU/g after 6 h of pre-enrichment. Our findings provide a rapid routine method of detection of V. parahaemolyticus based on tdh gene by real-time PCR for commercial seafood analysis to identify the risk of gastrointestinal diseases.
Collapse
Affiliation(s)
- Sara Federici
- 1Department of Biomolecular Sciences, Division of Toxicological, Hygienic and Environmental Sciences, University of Urbino "Carlo Bo", Via S. Chiara 27, 61029 Urbino, Italy
| | - Diana I Serrazanetti
- 2Inter-departmental Centre for Industrial Agri-Food Research, Alma Mater Studiorum, University of Bologna, Piazza Goidanich 60, 47521 Cesena, Italy
| | - M Elisabetta Guerzoni
- 3Department of Food Science, Alma Mater Studiorum, University of Bologna, Viale Fanin 46, 40127 Bologna, Italy
| | - Raffaella Campana
- 1Department of Biomolecular Sciences, Division of Toxicological, Hygienic and Environmental Sciences, University of Urbino "Carlo Bo", Via S. Chiara 27, 61029 Urbino, Italy
| | - Eleonora Ciandrini
- 1Department of Biomolecular Sciences, Division of Toxicological, Hygienic and Environmental Sciences, University of Urbino "Carlo Bo", Via S. Chiara 27, 61029 Urbino, Italy
| | - Wally Baffone
- 1Department of Biomolecular Sciences, Division of Toxicological, Hygienic and Environmental Sciences, University of Urbino "Carlo Bo", Via S. Chiara 27, 61029 Urbino, Italy
| | - Andrea Gianotti
- 2Inter-departmental Centre for Industrial Agri-Food Research, Alma Mater Studiorum, University of Bologna, Piazza Goidanich 60, 47521 Cesena, Italy.,3Department of Food Science, Alma Mater Studiorum, University of Bologna, Viale Fanin 46, 40127 Bologna, Italy.,4Dipartimento di Scienze e Tecnologie Agro-Alimentari (DISTAL), Department of Agricultural and Food Science, Alma Mater Studiorum, Università di Bologna, Via Fanin 50, 40127 Bologna, Italy.,Unità Organizzativa di Cesena, Piazza Goidanich 60, Cesena, FC Italy
| |
Collapse
|
5
|
Campana R, Casettari L, Ciandrini E, Illum L, Baffone W. Chitosans inhibit the growth and the adhesion of Klebsiella pneumoniae and Escherichia coli clinical isolates on urinary catheters. Int J Antimicrob Agents 2017; 50:135-141. [PMID: 28689873 DOI: 10.1016/j.ijantimicag.2017.03.031] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [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: 01/01/2017] [Revised: 02/14/2017] [Accepted: 03/15/2017] [Indexed: 11/12/2022]
Abstract
OBJECTIVE The aim of this study was to determine the antimicrobial activity of different chitosans (CS) against typical colonizing pathogens of the urinary tract and to assess their efficacy against bacterial adhesion and the subsequent biofilm formation on urinary catheters. METHODS The antimicrobial activity of high and low molecular weight CS (50 and 150 kDa) at pH 5.0 and 6.0 was tested against Klebsiella pneumoniae and Escherichia coli clinical isolates by time-kill studies. The anti-adhesion assays on Foley urinary catheters were performed in Artificial Urine Medium (AUM) with the addition of each CS (AUM-CS) at the same pH values. Finally, the efficacy over time of chitosan treatments on bacterial adhesion on urinary catheters was determined. RESULTS A viability reduction of K. pneumoniae and E. coli isolates, regardless of pH value, was evidenced in time-kill studies, in particular in the presence of CS 50 kDa. As regards the anti-adhesion efficacy on urinary catheters, high and low molecular weight CS evidenced a higher efficacy to reduce bacterial adhesion at pH 5.0. A low number of viable K. pneumoniae and E. coli cells were recovered from catheters after CS treatments, highlighting a promising efficacy over time. CONCLUSION Our data show the potential of chitosans to reduce or prevent not only the adhesion of well-known human uropathogens on urinary catheters but also the re-growth ability of the uropathogens.
Collapse
Affiliation(s)
- Raffaella Campana
- Department of Biomolecular Sciences, University of Urbino 'Carlo Bo', Urbino, Italy
| | - Luca Casettari
- Department of Biomolecular Sciences, University of Urbino 'Carlo Bo', Urbino, Italy.
| | - Eleonora Ciandrini
- Department of Translational Research and New Technologies in Medicine and Surgery, University of Pisa, Italy
| | - Lisbeth Illum
- IDentity, 19 Cavendish Crescent North, The Park, Nottingham NG7 1BA, UK
| | - Wally Baffone
- Department of Biomolecular Sciences, University of Urbino 'Carlo Bo', Urbino, Italy
| |
Collapse
|
6
|
Ciandrini E, Campana R, Baffone W. Live and heat-killed Lactobacillus spp. interfere with Streptococcus mutans and Streptococcus oralis during biofilm development on titanium surface. Arch Oral Biol 2017; 78:48-57. [DOI: 10.1016/j.archoralbio.2017.02.004] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2016] [Revised: 01/25/2017] [Accepted: 02/03/2017] [Indexed: 12/31/2022]
|
7
|
Manti A, Ciandrini E, Campana R, Dominici S, Ciacci C, Federici S, Sisti D, Rocchi MB, Papa S, Baffone W. A dual-species microbial model for studying the dynamics between oral streptococci and periodontal pathogens during biofilm development on titanium surfaces by flow cytometry. Res Microbiol 2016; 167:393-402. [DOI: 10.1016/j.resmic.2016.03.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2015] [Revised: 03/16/2016] [Accepted: 03/17/2016] [Indexed: 10/22/2022]
|
8
|
Ciandrini E, Campana R, Casettari L, Perinelli DR, Fagioli L, Manti A, Palmieri GF, Papa S, Baffone W. Characterization of biosurfactants produced by Lactobacillus spp. and their activity against oral streptococci biofilm. Appl Microbiol Biotechnol 2016; 100:6767-6777. [PMID: 27102127 DOI: 10.1007/s00253-016-7531-7] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [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: 03/09/2016] [Revised: 03/22/2016] [Accepted: 03/31/2016] [Indexed: 01/29/2023]
Abstract
Lactic acid bacteria (LAB) can interfere with pathogens through different mechanisms; one is the production of biosurfactants, a group of surface-active molecules, which inhibit the growth of potential pathogens. In the present study, biosurfactants produced by Lactobacillus reuteri DSM 17938, Lactobacillus acidophilus DDS-1, Lactobacillus rhamnosus ATCC 53103, and Lactobacillus paracasei B21060 were dialyzed (1 and 6 kDa) and characterized in term of reduction of surface tension and emulsifying activity. Then, aliquots of the different dialyzed biosurfactants were added to Streptococcus mutans ATCC 25175 and Streptococcus oralis ATCC 9811 in the culture medium during the formation of biofilm on titanium surface and the efficacy was determined by agar plate count, biomass analyses, and flow cytometry. Dialyzed biosurfactants showed abilities to reduce surface tension and to emulsifying paraffin oil. Moreover, they significantly inhibited the adhesion and biofilm formation on titanium surface of S. mutans and S. oralis in a dose-dependent way, as demonstrated by the remarkable decrease of cfu/ml values and biomass production. The antimicrobial properties observed for dialyzed biosurfactants produced by the tested lactobacilli opens future prospects for their use against microorganisms responsible of oral diseases.
Collapse
Affiliation(s)
- Eleonora Ciandrini
- Department of Biomolecular Sciences, Division of Toxicological, Hygiene and Environmental Sciences, University of Urbino "Carlo Bo", Via S. Chiara 27, 61029, Urbino, Italy
| | - Raffaella Campana
- Department of Biomolecular Sciences, Division of Toxicological, Hygiene and Environmental Sciences, University of Urbino "Carlo Bo", Via S. Chiara 27, 61029, Urbino, Italy
| | - Luca Casettari
- Department of Biomolecular Sciences, Division of Toxicological, Hygiene and Environmental Sciences, University of Urbino "Carlo Bo", Via S. Chiara 27, 61029, Urbino, Italy
| | - Diego R Perinelli
- School of Pharmacy, University of Camerino, via S. Agostino 1, 62032, Camerino, MC, Italy
| | - Laura Fagioli
- Department of Biomolecular Sciences, Division of Toxicological, Hygiene and Environmental Sciences, University of Urbino "Carlo Bo", Via S. Chiara 27, 61029, Urbino, Italy
| | - Anita Manti
- Department of Biomolecular Sciences, Division of Toxicological, Hygiene and Environmental Sciences, University of Urbino "Carlo Bo", Via S. Chiara 27, 61029, Urbino, Italy
| | | | - Stefano Papa
- Department of Biomolecular Sciences, Division of Toxicological, Hygiene and Environmental Sciences, University of Urbino "Carlo Bo", Via S. Chiara 27, 61029, Urbino, Italy
| | - Wally Baffone
- Department of Biomolecular Sciences, Division of Toxicological, Hygiene and Environmental Sciences, University of Urbino "Carlo Bo", Via S. Chiara 27, 61029, Urbino, Italy.
| |
Collapse
|
9
|
Federici S, Ciarrocchi F, Campana R, Ciandrini E, Blasi G, Baffone W. Identification and functional traits of lactic acid bacteria isolated from Ciauscolo salami produced in Central Italy. Meat Sci 2014; 98:575-84. [DOI: 10.1016/j.meatsci.2014.05.019] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2013] [Revised: 05/08/2014] [Accepted: 05/23/2014] [Indexed: 11/16/2022]
|
10
|
Manti A, Canonico B, Mazzeo R, Santolini R, Ciandrini E, Sisti D, Rocchi MBL, Nannoni F, Protano G, Papa S. Effects of landfill leachate treatment on hepatopancreas of Armadillidium vulgare (Crustacea, Isopoda). Environ Toxicol Chem 2013; 32:2593-2601. [PMID: 23929682 DOI: 10.1002/etc.2341] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2013] [Revised: 06/12/2013] [Accepted: 07/30/2013] [Indexed: 06/02/2023]
Abstract
The major environmental impact of landfills is emission of pollutants via the leachate and gas pathways. The hepatopancreas of the terrestrial isopod Armadillidium vulgare (Isopoda, Crustacea, Latreille 1804) plays an important role in the bioaccumulation of contaminants, such as heavy metals. To evaluate the effects of landfill leachate treatment, 2 different approaches were applied: 1) the detection of accumulation of trace elements (As, Cd, Cr, Cu, Sb, Zn, Pb, Ni, V) in hepatopancreatic cells, and 2) the evaluation of biological effect of contaminants on fresh hepatopancreatic cells by flow-cytometric analyses. The presence of 2 different cell types (herein referred to as "small" [S] cells and "big" [B] cells, in agreement with the literature based on morphological examinations) was detected for the first time by flow cytometry, which also highlighted their different response to stress stimuli. In particular, B cells appeared more sensitive to landfill leachate treatment, being more damaged in the short term, while S cells seemed more adaptive. Furthermore, S cells could represent a pool from which they are able to differentiate into B cells. These findings were also confirmed by principal component analyses, underlining that S SYBR Green I bright cells correlate with specific chemicals (Ca, Cu, Co), confirming their resistance to stress stimuli, and suggesting that the decrease of specific cell types may prime other elements to replace them in a homeostasis-preservation framework.
Collapse
Affiliation(s)
- Anita Manti
- Department of Earth, Life, and Environmental Sciences, University of Urbino Carlo Bo, Urbino, Italy
| | | | | | | | | | | | | | | | | | | |
Collapse
|
11
|
Campana R, Federici S, Ciandrini E, Baffone W. Antagonistic activity of Lactobacillus acidophilus ATCC 4356 on the growth and adhesion/invasion characteristics of human Campylobacter jejuni. Curr Microbiol 2012; 64:371-8. [PMID: 22271268 DOI: 10.1007/s00284-012-0080-0] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2011] [Accepted: 12/22/2011] [Indexed: 12/30/2022]
Abstract
The aim of this research was to determine the potential probiotic activity of Lactobacillus acidophilus ATCC 4356 against several human Campylobacter jejuni isolates. The ability to inhibit the pathogen's growth was evaluated by co-culture experiments as well as by antimicrobial assays with cell-free culture supernatant (CFCS), while interference with adhesion/invasion to intestinal Caco-2 cells was studied by exclusion, competition, and displacement tests. In the co-culture experiments L. acidophilus ATCC 4356 strain reduced the growth of C. jejuni with variable percentages of inhibition related to the contact time. The CFCS showed inhibitory activity against C. jejuni strains, stability to low pH, and thermal treatment and sensitivity to proteinase K and trypsin. L. acidophilus ATCC 4356 was able to reduce the adhesion and invasion to Caco-2 cells by most of the human C. jejuni strains. Displacement and exclusion mechanisms seem to be the preferred modalities, which caused a significant reduction of adhesion/invasion of pathogens to intestinal cells. The observed inhibitory properties of L. acidophilus ATCC 4356 on growth ability and on cells adhesion/invasion of C. jejuni may offer potential use of this strain for the management of Campylobacter infections.
Collapse
Affiliation(s)
- Raffaella Campana
- Department of Biomolecular Science, Division of Toxicology, Hygienic and Environmental Science, University of Urbino Carlo Bo, via S. Chiara 27, Urbino, Italy
| | | | | | | |
Collapse
|