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Chakroun I, Fedhila K, Maatallah M, Mzoughi R, Bakhrouf A, Krichen Y. The Synbiotic Effect of Probiotics and Dried Spirulina platensis or Phycocyanin on Biofilm Formation by Salmonella Typhimurium and Staphylococcus aureus. Foodborne Pathog Dis 2022; 19:655-662. [PMID: 36126311 DOI: 10.1089/fpd.2022.0008] [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] [Indexed: 11/13/2022] Open
Abstract
This study aimed to evaluate the synbiotic effect of probiotics and dried Spirulina platensis or phycocyanin on autoaggregation, coaggregation, and the inhibition of biofilm formation by Salmonella Typhimurium and Staphylococcus aureus on 96-well microtiter plates and Human colon carcinoma cells-116 surfaces. The results showed that the probiotics strains cultured in the presence of S. platensis exhibited the highest autoaggregation values, ranging between 68.5 and 74.2% after 24 h. All probiotic strains with or without S. platensis and phycocyanin showed coaggregation abilities with S. Typhimurium and S. aureus. Interestingly, significant effect of S. platensis and phycocyanin supplementation was observed on the inhibition of the biofilm formation by the selected pathogens during the competition, exclusion, and displacement on abiotic and biotic surfaces.
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Affiliation(s)
- Ibtissem Chakroun
- Laboratory of Analysis, Treatment and Valorisation of Environment Pollutants and Products, Faculty of Pharmacy, University of Monastir, Tunisia
| | - Kais Fedhila
- Laboratory of Analysis, Treatment and Valorisation of Environment Pollutants and Products, Faculty of Pharmacy, University of Monastir, Tunisia
| | - Makaoui Maatallah
- Laboratory of Analysis, Treatment and Valorisation of Environment Pollutants and Products, Faculty of Pharmacy, University of Monastir, Tunisia
| | - Ridha Mzoughi
- Laboratory of Analysis, Treatment and Valorisation of Environment Pollutants and Products, Faculty of Pharmacy, University of Monastir, Tunisia
| | - Amina Bakhrouf
- Laboratory of Analysis, Treatment and Valorisation of Environment Pollutants and Products, Faculty of Pharmacy, University of Monastir, Tunisia
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Haddaji N, Chakroun I, Fdhila K, Smati H, Bakhrouf A, Mzoughi R. Pathogenic Impacts of Bacillus cereus Strains on Crassostrea gigas. Foodborne Pathog Dis 2022; 19:151-158. [PMID: 35029524 DOI: 10.1089/fpd.2021.0050] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Regarding the economic importance of bivalve farming, a great deal of interest has recently been devoted to studying the pathogenesis of infectious diseases of these mollusks to prepare for public health emergencies. Bacillus cereus is one of these pathogens; it is a ubiquitous soil bacterium responsible for many types of gastrointestinal diseases associated with food. This study was conducted to determine the pathogenic effect of B. cereus on Crassostrea gigas. This effect was studied by assessing hemocytes death using flow cytometry analysis. The results showed that only ∼15% of C. gigas were able to survive after B. cereus artificial infection with 108 CFU (colony-forming unit)/oyster. Evenly, the percentage of nonviable hemocytes gradually increased with the concentration of B. cereus, with a peak value of ∼40% after infection. Indeed, findings showed that this strain is harmful to C. gigas.
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Affiliation(s)
- Najla Haddaji
- Department of Biology, Faculty of Sciences, University of Ha'il, Ha'il, Kingdom of Saudi Arabia.,Laboratory of Analysis, Treatment and Valorization of Pollutants of the Environment and Products, Faculty of Pharmacy, Monastir, Tunisia
| | - Ibtissem Chakroun
- Laboratory of Analysis, Treatment and Valorization of Pollutants of the Environment and Products, Faculty of Pharmacy, Monastir, Tunisia
| | - Kais Fdhila
- Laboratory of Analysis, Treatment and Valorization of Pollutants of the Environment and Products, Faculty of Pharmacy, Monastir, Tunisia
| | - Hela Smati
- Laboratory of Analysis, Treatment and Valorization of Pollutants of the Environment and Products, Faculty of Pharmacy, Monastir, Tunisia
| | - Amina Bakhrouf
- Laboratory of Analysis, Treatment and Valorization of Pollutants of the Environment and Products, Faculty of Pharmacy, Monastir, Tunisia
| | - Ridha Mzoughi
- Laboratory of Analysis, Treatment and Valorization of Pollutants of the Environment and Products, Faculty of Pharmacy, Monastir, Tunisia
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Chakroun I, Fedhila K, Mahdhi A, Mzoughi R, Saidane D, Esteban MÁ, Bakhrouf A. Atypical Salmonella Typhimurium persistence in the pacific oyster, Crassostrea gigas, and its effect on the variation of gene expression involved in the oyster's immune system. Microb Pathog 2021; 160:105185. [PMID: 34520817 DOI: 10.1016/j.micpath.2021.105185] [Citation(s) in RCA: 2] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2021] [Revised: 07/27/2021] [Accepted: 09/06/2021] [Indexed: 11/27/2022]
Abstract
Salmonella is one of the most important pathogens involved in food intoxication outbreaks, and in many cases, the intoxication has been linked to shellfish which is typically consumed raw. While much is understood about the interactions between Salmonella and vertebrates, much less is known about its relationships with invertebrates, which could be an overlooked and important aspect to better understand the Salmonella interaction with its diversified hosts. The aim of this study was to investigate the effect of preadaptation in seawater microcosms during 12 months on Salmonella Typhimurium by determining its survival capacity within this mollusk over a period of 30 days. The results showed that the stressed bacteria are able to survive in this mollusk at a higher concentration even after thirty days of infection compared to bacteria in the normal state. In order to minimize the effect of an experimental device for one month on the survival of Salmonella, we carried out an in vitro study to determine the number of viable Salmonella in the hemocytes of oysters. Interestingly, we evaluated the effect of the antibacterial activity of different extracts of C. gigas using the solvents (Methanol, Ethanol and acetic acid) specifically against stressed and unstressed Salmonella. Furthermore, we compared the expression of three genes in the oyster Cg-big-def1, timp and sod in response to experimental infections of this mollusk with Vibrio splendidus kb133 and S. Typhimurium LT2DT104 in normal and stressed states. These findings are very important to contribute to explaining several questions about the persistence of S. Typhimurium for a long time in C. gigas and the host's immune response to this microorganism which is considered to be non-virulent for molluscs.
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Affiliation(s)
- Ibtissem Chakroun
- Laboratory of Analysis, Treatment and Valorization of Pollutants of the Environment and Products, Faculty of Pharmacy, University of Monastir, 5000. Tunisia.
| | - Kais Fedhila
- Laboratory of Analysis, Treatment and Valorization of Pollutants of the Environment and Products, Faculty of Pharmacy, University of Monastir, 5000. Tunisia
| | - Abdelkarim Mahdhi
- Laboratory of Analysis, Treatment and Valorization of Pollutants of the Environment and Products, Faculty of Pharmacy, University of Monastir, 5000. Tunisia
| | - Ridha Mzoughi
- Laboratory of Analysis, Treatment and Valorization of Pollutants of the Environment and Products, Faculty of Pharmacy, University of Monastir, 5000. Tunisia
| | - Dalila Saidane
- Laboratory of Analysis, Treatment and Valorization of Pollutants of the Environment and Products, Faculty of Pharmacy, University of Monastir, 5000. Tunisia
| | - Ma Ángeles Esteban
- Department of Cell Biology and Histology, Faculty of Biology, Campus Regional de Excelencia Internacional "Campus Mare Nostrum", University of Murcia, 30100. Murcia, Spain
| | - Amina Bakhrouf
- Laboratory of Analysis, Treatment and Valorization of Pollutants of the Environment and Products, Faculty of Pharmacy, University of Monastir, 5000. Tunisia
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Mahdhi A, Chakroun I, Espinosa-Ruiz C, Messina CM, Arena R, Majdoub H, Santulli A, Mzoughi R, Esteban MA. Dietary administration effects of exopolysaccharide from potential probiotic strains on immune and antioxidant status and nutritional value of European sea bass (Dicentrarchus labrax L.). Res Vet Sci 2020; 131:51-58. [PMID: 32302865 DOI: 10.1016/j.rvsc.2020.04.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [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: 01/03/2020] [Revised: 03/14/2020] [Accepted: 04/04/2020] [Indexed: 10/24/2022]
Abstract
The use of biological immunostimulants is considered a valuable practice to improve culture conditions in aquaculture sector that may help to increase production and maintain healthy environment. We undertook this study in order to evaluate the potential effect of the administration of two exopolysaccharides (EPS) "EPLB" and "EPB" derived from potential probiotic strains on immune and antioxidant status of European sea bass (Dicentrarchus labrax L.) larvae. In order to find out if the EPSs have an effect on the biochemical composition during the trial period, the nutritional value has been evaluated. The results revealed that expression levels of immune-relevant genes (infg, Il1b, Il8, Il6 and tcr-β) in the gut and head kidney and the scavenging enzymes (cat, sod, gr) genes in the liver were modulated. In fact, the dietary supplementation with the tested EPSs, significantly enhances the expression of immune-associated genes in the head-kidney, particularly infg and tcrβ, as well as catalase gene in liver. During the period of study, EPSs administration did not affect the fatty acid profiles of larvae, which is balanced. This is confirmed by the Docosahexaenoic acid / Eicosapentaenoic acid ratio and demonstrates that EPLB and EPB can be administrated without any negative effect on biochemical composition of European sea bass. The present findings provided evidence that the tested EPSs with antibacterial and antioxidant activities can enhance immune response without negative effect on the biochemical composition. The used EPSs can be considered as a good source of natural functional aquafeed ingredients for European sea bass.
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Affiliation(s)
- Abdelkarim Mahdhi
- Laboratory of Analysis, Treatment and Valorization of Pollutants of the envirOnment and Products. Faculty of Pharmacy, University of Monastir, Tunisia.
| | - Ibtissem Chakroun
- Laboratory of Analysis, Treatment and Valorization of Pollutants of the envirOnment and Products. Faculty of Pharmacy, University of Monastir, Tunisia
| | - Cristóbal Espinosa-Ruiz
- Immunobiology for aquaculture Group, Department of Cell Biology and Histology, Faculty of Biology, Campus Regional de Excelencia Internacional "Campus Mare Nostrum", University of Murcia, 30100 Murcia, Spain; University of Palermo, Department of Earth and Sea Science, Marine Biochemistry and Ecotoxicology Laboratory, (Trapani), via Barlotta 4, 91100, Italy
| | - Concetta Maria Messina
- University of Palermo, Department of Earth and Sea Science, Marine Biochemistry and Ecotoxicology Laboratory, (Trapani), via Barlotta 4, 91100, Italy
| | - Rosaria Arena
- University of Palermo, Department of Earth and Sea Science, Marine Biochemistry and Ecotoxicology Laboratory, (Trapani), via Barlotta 4, 91100, Italy
| | - Hatem Majdoub
- Laboratory of Analysis, Treatment and Valorization of the Polluants of the Environment and Products, Faculty of Pharmacy, University of Monastir, Tunisia
| | - Andrea Santulli
- University of Palermo, Department of Earth and Sea Science, Marine Biochemistry and Ecotoxicology Laboratory, (Trapani), via Barlotta 4, 91100, Italy
| | - Ridha Mzoughi
- Laboratory of Analysis, Treatment and Valorization of Pollutants of the envirOnment and Products. Faculty of Pharmacy, University of Monastir, Tunisia
| | - Maria Angeles Esteban
- Immunobiology for aquaculture Group, Department of Cell Biology and Histology, Faculty of Biology, Campus Regional de Excelencia Internacional "Campus Mare Nostrum", University of Murcia, 30100 Murcia, Spain
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Mahdhi A, Leban N, Chakroun I, Bayar S, Mahdouani K, Majdoub H, Kouidhi B. Use of extracellular polysaccharides, secreted by Lactobacillus plantarum and Bacillus spp., as reducing indole production agents to control biofilm formation and efflux pumps inhibitor in Escherichia coli. Microb Pathog 2018; 125:448-453. [DOI: 10.1016/j.micpath.2018.10.010] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2018] [Revised: 10/02/2018] [Accepted: 10/09/2018] [Indexed: 12/19/2022]
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Dammak MI, Mzoughi Z, Chakroun I, Mansour HB, Le Cerf D, Majdoub H. Optimization of polysaccharides extraction from quince peels: partial characterization, antioxidant and antiproliferative properties. Nat Prod Res 2018; 34:1470-1474. [PMID: 30445860 DOI: 10.1080/14786419.2018.1514403] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
In this study, Box-Behnken Design was used to optimize the ultrasonic extraction of polysaccharides from quince peels (QPPs) by ascorbic acid and the effect of extraction temperature, extraction time and pH was evaluated. Under optimized conditions of temperature 90 °C, 60 min sonication time and pH = 3.26, the extraction yield, the galacturonic acid yield and the concentration of sample required to scavenge 50% of 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulphonic) acid (ABTS) values of QPPs were respectively 10.25%, 3.86% and 1.35 mg/mL. The QPPs extracted under optimum conditions was characterized by Fourier transform infrared spectroscopy (FTIR), Nuclear magnetic resonance (1 H NMR) and Size exclusion chromatography (SEC/MALS/VD/DRI). The monosaccharide analysis revealed that arabinose was the most abundant, followed by galactose, glucose, mannose and xylose. Moreover, QPPs showed significant antioxidant activities (2,2-diphenyl-1-picrylhydrazyl (DPPH) and Ferric- reducing antioxidant power (FRAP)) and reduced viability of human Caco-2 and murine B-16 cell lines in a dose-dependent manner. Hence QPPs could be used as antitumor agent in functional foods andpharmaceutical industries.
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Affiliation(s)
- Mariem Itaimi Dammak
- Laboratoire des Interfaces et des Matériaux Avancés (LIMA), Faculté des Science de Monastir, Université de Monastir, Monastir, Tunisia
| | - Zeineb Mzoughi
- Laboratoire des Interfaces et des Matériaux Avancés (LIMA), Faculté des Science de Monastir, Université de Monastir, Monastir, Tunisia
| | - Ibtissem Chakroun
- Unité de Recherche Analyses et Procédés Appliqués à l'Environnement UR17ES32-Institut Supérieur des Sciences Appliquées et de Technologie de Mahdia, Université de Monastir, Monastir, Tunisia
| | - Hedi Ben Mansour
- Unité de Recherche Analyses et Procédés Appliqués à l'Environnement UR17ES32-Institut Supérieur des Sciences Appliquées et de Technologie de Mahdia, Université de Monastir, Monastir, Tunisia
| | - Didier Le Cerf
- Normendie Université, Laboratoire de Polymères Biopolymères Surfaces (PBS), UMR 6270 & FR3038CNRS, Université de Rouen, Mont Saint Aignan, France
| | - Hatem Majdoub
- Laboratoire des Interfaces et des Matériaux Avancés (LIMA), Faculté des Science de Monastir, Université de Monastir, Monastir, Tunisia
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Dammak MI, Chakroun I, Mzoughi Z, Amamou S, Mansour HB, Le Cerf D, Majdoub H. Characterization of polysaccharides from Prunus amygdalus peels: Antioxidant and antiproliferative activities. Int J Biol Macromol 2018; 119:198-206. [DOI: 10.1016/j.ijbiomac.2018.07.125] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2017] [Revised: 07/17/2018] [Accepted: 07/20/2018] [Indexed: 11/30/2022]
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Chakroun I, Mahdhi A, Morcillo P, Cordero H, Cuesta A, Bakhrouf A, Mahdouani K, Esteban MÁ. Motility, biofilm formation, apoptotic effect and virulence gene expression of atypical Salmonella Typhimurium outside and inside Caco-2 cells. Microb Pathog 2018; 114:153-162. [DOI: 10.1016/j.micpath.2017.11.010] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2017] [Revised: 11/04/2017] [Accepted: 11/09/2017] [Indexed: 12/15/2022]
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Mzoughi Z, Chakroun I, Hamida SB, Rihouey C, Mansour HB, Le Cerf D, Majdoub H. Ozone treatment of polysaccharides from Arthrocnemum indicum : Physico-chemical characterization and antiproliferative activity. Int J Biol Macromol 2017; 105:1315-1323. [DOI: 10.1016/j.ijbiomac.2017.07.151] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2017] [Revised: 07/05/2017] [Accepted: 07/25/2017] [Indexed: 12/21/2022]
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Mahdhi A, Leban N, Chakroun I, Chaouch MA, Hafsa J, Fdhila K, Mahdouani K, Majdoub H. Extracellular polysaccharide derived from potential probiotic strain with antioxidant and antibacterial activities as a prebiotic agent to control pathogenic bacterial biofilm formation. Microb Pathog 2017; 109:214-220. [DOI: 10.1016/j.micpath.2017.05.046] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2016] [Revised: 05/01/2017] [Accepted: 05/30/2017] [Indexed: 12/30/2022]
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Fdhila K, Haddaji N, Chakroun I, Dhiaf A, Macherki MEE, Khouildi B, Lamari F, Chaieb K, Abid N, Marzougui H, Khouadja S, Missaoui H. Culture conditions improvement of Crassostrea gigas using a potential probiotic Bacillus sp strain. Microb Pathog 2017; 110:654-658. [PMID: 28710014 DOI: 10.1016/j.micpath.2017.07.017] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [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: 12/18/2016] [Revised: 07/10/2017] [Accepted: 07/10/2017] [Indexed: 10/19/2022]
Abstract
It is well demonstrated that some probiotics improve rearing water quality and thereby have beneficial effects on reared organisms. We conducted this study to determine the effect of Bacillus consortium on Crassostrea gigas reared in contemned seawater with indigo dye priory treated with Bacillus or no treated. This effect was studied by assessing hemocytes death using flow cytometry analysis. We found that the percentage of decolorization of indigo dye in polluted seawater in presence of C. gigas increased from 41% to 90% when using Bacillus consortium. In these conditions, the hemocytes mortality of reared C. gigas decreased from 87% to 56%. We have demonstrated also that seawater contemned with priory treated indigo with Bacillus consortium is less toxic than seawater contemned with the no treated indigo. The percentage of hemocytes death is 81% for the contemned seawater with indigo and 56% for no contemned seawater. This consortium shows a protector effect of C. gigas against Vibrio harveyi contemning reared seawater.
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Affiliation(s)
- Kais Fdhila
- Laboratory of Analysis, Treatment and Valorization of Pollutants Faculty of Pharmacy of Monastir, Tunisia
| | - Najla Haddaji
- Laboratory of Analysis, Treatment and Valorization of Pollutants Faculty of Pharmacy of Monastir, Tunisia.
| | - Ibtissem Chakroun
- Laboratory of Analysis, Treatment and Valorization of Pollutants Faculty of Pharmacy of Monastir, Tunisia
| | - Amel Dhiaf
- Laboratory of Analysis, Treatment and Valorization of Pollutants Faculty of Pharmacy of Monastir, Tunisia
| | | | - Bochra Khouildi
- Fisheries Laboratory, Higher Institute of Agriculture Tunis, Tunisia
| | - Faouzi Lamari
- Laboratory of Analysis, Treatment and Valorization of Pollutants Faculty of Pharmacy of Monastir, Tunisia
| | - Kamel Chaieb
- Laboratory of Analysis, Treatment and Valorization of Pollutants Faculty of Pharmacy of Monastir, Tunisia
| | - Nabil Abid
- Laboratory of Analysis, Treatment and Valorization of Pollutants Faculty of Pharmacy of Monastir, Tunisia
| | - Hajer Marzougui
- Fisheries Laboratory, Higher Institute of Agriculture Tunis, Tunisia
| | - Sadok Khouadja
- Laboratory of Analysis, Treatment and Valorization of Pollutants Faculty of Pharmacy of Monastir, Tunisia
| | - Hechmi Missaoui
- Fisheries Laboratory, Higher Institute of Agriculture Tunis, Tunisia
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Lamari F, Chakroun I, Rtimi S. Assessment of the correlation among antibiotic resistance, adherence to abiotic and biotic surfaces, invasion and cytotoxicity of Pseudomonas aeruginosa isolated from diseased gilthead sea bream. Colloids Surf B Biointerfaces 2017; 158:229-236. [PMID: 28697438 DOI: 10.1016/j.colsurfb.2017.06.044] [Citation(s) in RCA: 11] [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: 01/24/2017] [Revised: 05/28/2017] [Accepted: 06/26/2017] [Indexed: 11/27/2022]
Abstract
Improper uses of antibiotics to treat fish disease pose an increase of multidrug resistance in Pseudomonas aeruginosa. In order to escape host antimicrobial agents and induce cytotoxicity, different virulence properties are needed by these bacteria such as, biofilm formation, adhesion and invasion ability. This study was conducted to isolate Pseudomonas aeruginosa from diseased cultured gilthead sea bream. Seventeen isolates of Pseudomonas aeruginosa were identified by PCR. All of the isolates tested were susceptible to Gentamicin and Ciprofloxacin. Highest level of resistance was observed against Erythromycin, Ampicillin and Tetracycline. Among the 17 isolates, 11 showed multi-drug resistance. The isolates were screened for biofilm formation in abiotic surfaces, adherence, invasion and cytotoxicity against Hep-2 cells. We found that some strains were able to adhere to abiotic and biotic surface and to enter inside Hep-2 cells. Using cytochalasin D inhibitor, we observed a significant decrease in invasion of epithelial cells. The 17 washed bacterial cells induce variable degree of cytotoxicity. However, no cytotoxic effects on Hep-2 cells were obtained among the totality of cell free filtrate of Pseudomonas strains. By studying the relationship between different virulence properties, a significant positive correlation was obtained between both biofilm formation and adherence, and between adherence and invasion to epithelial cells. Subsequently, we found that the mean values of adhesion and invasion in the MDR group were significantly higher than those observed in the non-MDR group. Likewise, a significant positive correlation was found among adhesive and invasive capacities of Pseudomonas strains and their antibiotic resistance phenotypes.
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Affiliation(s)
- Faouzi Lamari
- Laboratory of Analysis, Treatment and Valorization of Environment Polluants and Products, Faculty of Pharmacy, Monastir University, Monastir, 5000, Tunisia.
| | - Ibtissem Chakroun
- Laboratory of Analysis, Treatment and Valorization of Environment Polluants and Products, Faculty of Pharmacy, Monastir University, Monastir, 5000, Tunisia
| | - Sami Rtimi
- Ecole Polytechnique Fédérale de Lausanne (EPFL), STI-IMX-LTP, Station 12, 1015, Lausanne, Switzerland.
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Chakroun I, Cordero H, Mahdhi A, Morcillo P, Fedhila K, Cuesta A, Bakhrouf A, Mahdouani K, Esteban MÁ. Adhesion, invasion, cytotoxic effect and cytokine production in response to atypical Salmonella Typhimurium infection. Microb Pathog 2017; 106:40-49. [DOI: 10.1016/j.micpath.2016.11.004] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2016] [Revised: 11/03/2016] [Accepted: 11/08/2016] [Indexed: 12/26/2022]
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Lamari F, Mahdhi A, Chakroun I, Esteban MA, Mazurais D, Amina B, Gatesoupe FJ. Interactions between candidate probiotics and the immune and antioxidative responses of European sea bass (Dicentrarchus labrax) larvae. J Fish Dis 2016; 39:1421-1432. [PMID: 27133829 DOI: 10.1111/jfd.12479] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [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: 11/24/2015] [Revised: 02/16/2016] [Accepted: 02/18/2016] [Indexed: 06/05/2023]
Abstract
The use of lactic acid bacteria (LAB) as probiotics in aquaculture may improve the quality of seed production and limit the use of antibiotics in fish hatcheries. This study attempted to further characterize the candidate probiotic Lactobacillus casei X2, and the immune and physiological responses of the sea bass larvae. L. casei X2 was confirmed as a good candidate, due to its wide antibacterial spectrum against both Gram-positive and Gram-negative bacteria, and its free radical scavenging activity. In addition, if the strain did not seem able to form biofilm on abiotic surfaces, it adhered strongly to Hep-2 cells. However, these characteristics did not seem efficient in vivo. At 20 days post-hatch (dph), the expression level of CAT gene was significantly different between group fed without probiotic and the two groups treated with either Pediococcus acidilactici or L. casei. This gene was upregulated in the group treated with strain X2 and downregulated in the group with a commercial probiotic strain P. acidilactici, suggesting a better antioxidant activity with the later strain. At the same sampling date, the IL-1β gene was upregulated in the group treated with P. acidilactici, and the HSP70 gene was overexpressed at 41 dph. As the stimulation of these two last genes, such transcriptomic indicators must be cautiously interpreted.
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Affiliation(s)
- F Lamari
- Ifremer, UMR 6539 LEMAR, Laboratoire 'Adaptation, Reproduction, Nutrition' (ARN), Centre de Bretagne, Plouzané, France.
- Laboratory of Analysis, Treatment and Valorization of Environment Pollutants and Products, Faculty of Pharmacy, Monastir University, Monastir, Tunisia.
| | - A Mahdhi
- Laboratory of Analysis, Treatment and Valorization of Environment Pollutants and Products, Faculty of Pharmacy, Monastir University, Monastir, Tunisia
| | - I Chakroun
- Laboratory of Analysis, Treatment and Valorization of Environment Pollutants and Products, Faculty of Pharmacy, Monastir University, Monastir, Tunisia
| | - M A Esteban
- Fish Innate Immune System Group, Department of Cell Biology and Histology, Faculty of Biology, Campus Regional de Excelencia Internacional 'Campus Mare Nostrum', University of Murcia, Murcia, Spain
| | - D Mazurais
- Ifremer, UMR 6539 LEMAR, Laboratoire 'Adaptation, Reproduction, Nutrition' (ARN), Centre de Bretagne, Plouzané, France
| | - B Amina
- Laboratory of Analysis, Treatment and Valorization of Environment Pollutants and Products, Faculty of Pharmacy, Monastir University, Monastir, Tunisia
| | - F-J Gatesoupe
- Ifremer, UMR 6539 LEMAR, Laboratoire 'Adaptation, Reproduction, Nutrition' (ARN), Centre de Bretagne, Plouzané, France
- NUMEA, INRA, Université de Pau et des Pays de l'Adour, Saint Pée sur Nivelle, France
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Fdhila K, Haddaji N, Chakroun I, Macherki MEE, Nefzi F, Bakhrouf A. Glucomannan's protective effect on the virulence of Vibrio splendidus in pacific oyster. Fish Shellfish Immunol 2016; 56:410-416. [PMID: 27492122 DOI: 10.1016/j.fsi.2016.07.040] [Citation(s) in RCA: 2] [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: 03/29/2016] [Revised: 07/15/2016] [Accepted: 07/31/2016] [Indexed: 06/06/2023]
Abstract
We examine the effect of Glucomannan, extracted from Candida utilis yeast, on immune parameters and resistance to Vibrio splendidus of Crassostreagigas. Our results showed that Glucomannan was a successful anti-adhesive molecule; it exhibited a stronger inhibitory effect on adhesion of Vibrio splendidus in infected Crassostreagigas. Vibrio splendidus viable cells number declined after incubation with Glucomannan. Furthermore, the Glucomannan diet showed higher activity to trigger the immune response against bacteria. Glucomannan applications, in biological control of seafood associated pathogens can be an alternative solution, providing consumer with a product of good quality owing to the use of 40 non-toxic compounds. Based on our results, Glucomannan could be used as a bio-protective culture in oyster's depuration to prevent Vibrio splendidus growth.
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Affiliation(s)
- Kais Fdhila
- Laboratory of Analysis, Treatment and Valorization of Pollutants of the Environment and Products (LATVPEP), Faculty of Pharmacy, University of Monastir, Monastir 5000, Tunisia
| | - Najla Haddaji
- Laboratory of Analysis, Treatment and Valorization of Pollutants of the Environment and Products (LATVPEP), Faculty of Pharmacy, University of Monastir, Monastir 5000, Tunisia.
| | - Ibtissem Chakroun
- Laboratory of Analysis, Treatment and Valorization of Pollutants of the Environment and Products (LATVPEP), Faculty of Pharmacy, University of Monastir, Monastir 5000, Tunisia
| | - Mohammed Ezz Eddine Macherki
- Laboratory of Analysis, Treatment and Valorization of Pollutants of the Environment and Products (LATVPEP), Faculty of Pharmacy, University of Monastir, Monastir 5000, Tunisia
| | - Faten Nefzi
- Laboratory of Transmissible Diseases and Biologically Active Substances, Tunisia
| | - Amina Bakhrouf
- Laboratory of Analysis, Treatment and Valorization of Pollutants of the Environment and Products (LATVPEP), Faculty of Pharmacy, University of Monastir, Monastir 5000, Tunisia
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Cheour M, Mazlout H, Agrebi S, Falfoul Y, Chakroun I, Lajmi H, Kraiem A. [Compressive optic neuropathy secondary to a pituitary macroadenoma]. J Fr Ophtalmol 2013; 36:e101-4. [PMID: 23623769 DOI: 10.1016/j.jfo.2012.08.014] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2012] [Revised: 07/22/2012] [Accepted: 08/17/2012] [Indexed: 11/15/2022]
Abstract
INTRODUCTION Pituitary adenoma is a common benign tumor representing 8 to 10% of intracranial mass lesions. The compressive optic neuropathy associated with a pituitary adenoma can be clinically indistinguishable from glaucomatous optic neuropathy. CASE REPORT A 56-year-old man with no significant past medical history had noticed a rapid decrease in visual acuity for 6 months. Funduscopic examination revealed glaucoma-like bilateral, asymmetric optic cupping. Brain MRI examination revealed a pituitary tumor compressing the optic chiasm. CONCLUSION The diagnosis of a compressive optic neuropathy associated with a pituitary adenoma can be difficult, since it often simulates chronic glaucoma. However, several features should alert the clinician to the possibility of a compressive optic neuropathy and prompt neuroimaging, in order to obtain earlier diagnosis and treatment.
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Affiliation(s)
- M Cheour
- Service d'ophtalmologie, faculté de médecine de Tunis, université de Tunis El Manar, CHU Habib Thameur, 8, rue Ali Ben Ayed Montfleury, 1008 Tunis, Tunisie.
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Elabed H, Maatallah M, Hamza R, Chakroun I, Bakhrouf A, Gaddour K. Effect of long-term starvation in salty microcosm on biofilm formation and motility in Pseudomonas aeruginosa. World J Microbiol Biotechnol 2012. [PMID: 23208601 DOI: 10.1007/s11274-012-1221-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
The development of antibiotic resistance in the opportunistic pathogen Pseudomonas aeruginosa is a major cause of the pathogen's morbidity and is strongly correlated with the biofilm formation. Motility and adherence capacity in long-term stressed cells have not been extensively analyzed even though P. aeruginosa considered a model organism for the study of biofilm formation. In this investigation, P. aeruginosa ATCC 27853 strain has been stored for 12 months in LB broth with 0.5 M NaCl. Several experiments demonstrated that the strain recovery from the salty microcosm had the ability to increase the biofilm formation and to reduce motility comparing with that of the original strain. To identify genes involved in the regulation of biofilm and/or in stress response by the recovered P. aeruginosa, differential display "DDRT-PCR" technique was used. The genes speD and ccoN2, coding, respectively, for an S-adenosylmethionine decarboxylase and Cbb3-type cytochrome oxidase, were identified in recovered strain of P. aeruginosa ATCC 27853 as two differentially expressed gene fragments. A comparison of the biofilm produced by the wild-type strain PA14 and the transposon insertion mutant for speD gene suggested that spermidine has a potential role in the adaptive response in P. aeruginosa incubated in long-term stress conditions.
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Affiliation(s)
- Hamouda Elabed
- Laboratory of Analysis, Treatment and Valorization of Environment Polluants and Products, Faculty of Pharmacy, University of Monastir, 5000 Monastir, Tunisia.
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Abstract
Interleukin-1 (IL-1) is an inflammatory mediator that increases Cl- secretion in intestinal epithelial cells. To identify the signal transduction pathway(s) involved in IL-1's action, cells were treated with IL-1 and the levels of cyclooxygenase (COX) enzymes, prostaglandin E2 (PGE2) and phospholipase A2-activating protein (PLAP), and the activity of phospholipase A2 (PLA2) were measured. IL-1 caused concentration- and time-dependent increases in the levels of PLA2 activity, and/or in the levels of PLAP, COX-2 and PGE2. The IL-induced increase in PGE2 levels was biphasic, with the first peak due to the increase in PLAP levels, and the second peak due to the increase in COX-2 levels. This increase in PGE2 levels may provide a mechanism for acute and chronic inflammation in the intestine.
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Affiliation(s)
- F R Homaidan
- Department of Physiology, Faculty of Medicine, American University of Beirut, Lebanon.
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