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Ghione S, Michaud L, Sarter H, Armengol-Debeir L, Fumery M, Savoye G, Ley D, Spyckerelle C, Pariente B, Mouterde O, Djeddi D, Peyrin-Biroulet L, Gower C, Turck D. Augmentation de l’incidence de la maladie de Crohn et de la rectocolite hémorragique chez l’adolescent sur une période de 21ans. Arch Pediatr 2016. [DOI: 10.1016/j.arcped.2016.02.026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Cardey J, Le Gall C, Michaud L, Dabadie A, Talbotec C, Bellaiche M, Lamireau T, Mas E, Lachaux A. La vidéocapsule oesophagienne : une méthode non invasive et fiable pour le diagnostic et la surveillance des varices oesophagiennes chez l’enfant. Arch Pediatr 2016. [DOI: 10.1016/j.arcped.2016.02.037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Carette-Lherbier S, Sarter H, Spyckerelle C, Devouge E, Legrand C, Couttenier F, Coopman S, Michaud L, Guimber D, Gottrand F, Ganga-Zandzou P, Gower-Rousseau C, Turck D. Évaluation du recours aux médecines non conventionnelles par les enfants atteints de maladie inflammatoire chronique de l’intestin. Arch Pediatr 2016. [DOI: 10.1016/j.arcped.2016.02.027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Graziano M, Rizzo C, Michaud L, Porporato EMD, De Domenico E, Spanò N, Lo Giudice A. Biosurfactant production by hydrocarbon-degradingBrevibacteriumandVibrioisolates from the sea penPteroeides spinosum(Ellis, 1764). J Basic Microbiol 2016; 56:963-74. [DOI: 10.1002/jobm.201500701] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2015] [Accepted: 04/03/2016] [Indexed: 11/07/2022]
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Gugliandolo C, Michaud L, Lo Giudice A, Lentini V, Rochera C, Camacho A, Maugeri TL. Prokaryotic Community in Lacustrine Sediments of Byers Peninsula (Livingston Island, Maritime Antarctica). MICROBIAL ECOLOGY 2016; 71:387-400. [PMID: 26337826 DOI: 10.1007/s00248-015-0666-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2015] [Accepted: 08/18/2015] [Indexed: 06/05/2023]
Abstract
Byers Peninsula (Livingston Island, Antarctica), the largest seasonally ice-free region of the Maritime Antarctica, holds a large number of lakes, ponds, and streams. The prokaryotic structure and bacterial diversity in sediment samples collected during the 2008-2009 austral summer from five inland lakes, two coastal lakes, and an estuarine site were analyzed by Catalyzed Reporter Deposition Fluorescence In Situ Hybridization (CARD-FISH) and 16S rRNA 454 tag pyrosequencing techniques, respectively. Differently from inland lakes, which range around the oligotrophic status, coastal lakes are eutrophic environments, enriched by nutrient inputs from marine animals. Although the prokaryotic abundances (estimated as DAPI stained cells) in sediment samples were quite similar among inland and coastal lakes, Bacteria always far dominated over Archaea. Despite the phylogenetic analysis indicated that most of sequences were affiliated to a few taxonomic groups, mainly referred to Proteobacteria, Bacteroidetes, and Actinobacteria, their relative abundances greatly differed from each site. Differences in bacterial composition showed that lacustrine sediments were more phyla rich than the estuarine sediment. Proteobacterial classes in lacustrine samples were dominated by Betaproteobacteria (followed by Alphaproteobacteria, Deltaproteobacteria, and Gammaproteobacteria), while in the estuarine sample, they were mainly related to Gammaproteobacteria (followed by Deltaproteobacteria, Epsilonproteobacteria, Alphaproteobacteria, and Betaproteobacteria). Higher number of sequences of Alphaproteobacteria, Cyanobacteria, Verrucomicrobia, and Planctomycetes were observed in sediments of inland lakes compared to those of coastal lakes, whereas Chloroflexi were relatively more abundant in the sediments of coastal eutrophic lakes. As demonstrated by the great number of dominant bacterial genera, bacterial diversity was higher in the sediments of inland lakes than that in coastal lakes. Ilumatobacter (Actinobacteria), Gp16 (Acidobacteria), and Gemmatimonas (Gemmatimonadetes) were recovered as dominant genera in both inland and coastal lakes, but not in the estuarine sample, indicating that they may be useful markers of Antarctic lakes. The proximity to the sea, the different lake depths and the external or internal origin of the nutrient sources shape the bacterial communities composition in lacustrine sediments of Byers Peninsula.
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Poghosyan T, Catry J, Luong-Nguyen M, Bruneval P, Domet T, Arakelian L, Sfeir R, Michaud L, Vanneaux V, Gottrand F, Larghero J, Cattan P. Esophageal tissue engineering: Current status and perspectives. J Visc Surg 2015; 153:21-9. [PMID: 26711880 DOI: 10.1016/j.jviscsurg.2015.11.009] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Tissue engineering, which consists of the combination and in vivo implantation of elements required for tissue remodeling toward a specific organ phenotype, could be an alternative for classical techniques of esophageal replacement. The current hybrid approach entails creation of an esophageal substitute composed of an acellular matrix and autologous epithelial and muscle cells provides the most successful results. Current research is based on the use of mesenchymal stem cells, whose potential for differentiation and proangioogenic, immune-modulator and anti-inflammatory properties are important assets. In the near future, esophageal substitutes could be constructed from acellular "intelligent matrices" that contain the molecules necessary for tissue regeneration; this should allow circumvention of the implantation step and still obtain standardized in vivo biological responses. At present, tissue engineering applications to esophageal replacement are limited to enlargement plasties with absorbable, non-cellular matrices. Nevertheless, the application of existing clinical techniques for replacement of other organs by tissue engineering in combination with a multiplication of translational research protocols for esophageal replacement in large animals should soon pave the way for health agencies to authorize clinical trials.
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Garabedian C, Sfeir R, Langlois C, Bonnard A, Khen-Dunlop N, Gelas T, Michaud L, Auber F, Piolat C, Lemelle JL, Fouquet V, Habonima É, Becmeur F, Polimerol ML, Breton A, Petit T, Podevin G, Lavrand F, Allal H, Lopez M, Elbaz F, Merrot T, Michel JL, Buisson P, Sapin E, Delagausie P, Pelatan C, Gaudin J, Weil D, de Vries P, Jaby O, Lardy H, Aubert D, Borderon C, Fourcade L, Geiss S, Breaud J, Pouzac M, Echaieb A, Laplace C, Gottrand F, Houfflin-Debarge V. Le diagnostic anténatal modifie-t-il la prise en charge néonatale et le devenir à 1 an des enfants suivis pour atrésie de l’œsophage de type III ? ACTA ACUST UNITED AC 2015; 44:848-54. [DOI: 10.1016/j.jgyn.2014.12.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2014] [Revised: 11/09/2014] [Accepted: 12/01/2014] [Indexed: 11/30/2022]
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Rizzo C, Michaud L, Graziano M, De Domenico E, Syldatk C, Hausmann R, Lo Giudice A. Biosurfactant activity, heavy metal tolerance and characterization of Joostella strain A8 from the Mediterranean polychaete Megalomma claparedei (Gravier, 1906). ECOTOXICOLOGY (LONDON, ENGLAND) 2015; 24:1294-1304. [PMID: 26059469 DOI: 10.1007/s10646-015-1504-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 05/28/2015] [Indexed: 06/04/2023]
Abstract
The effect of heavy metals on the activity of biosurfactants produced by Joostella strain A8 from the polychaete Megalomma claparedei was investigated. Biosurfactant activity was first improved by evaluating the influence of abiotic parameters. Higher E(24) indices were achieved at 25 °C in mineral salt medium supplemented with 2 % glucose, 3 % sodium chloride (w/v) and 0.1 % ammonium chloride (w/v). Considerable surface tension reduction was never recorded. Heavy metal tolerance was preliminarily assayed by plate diffusion method resulting in the order of toxicity Cd > Cu > Zn. The activity of biosurfactants was then evaluated in the presence of heavy metals at different concentrations in liquid cultures that were incubated under optimal conditions for biosurfactant activity. The production of stable emulsions resulted generally higher in the presence of metals. These findings suggest that biosurfactant production could represent a bacterial adaptive strategy to defend cells from a stress condition derived from heavy metals in the bulk environment.
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Malavenda R, Rizzo C, Michaud L, Gerçe B, Bruni V, Syldatk C, Hausmann R, Lo Giudice A. Biosurfactant production by Arctic and Antarctic bacteria growing on hydrocarbons. Polar Biol 2015. [DOI: 10.1007/s00300-015-1717-9] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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McCann F, Michaud L, Aspirot A, Levesque D, Gottrand F, Faure C. Congenital esophageal stenosis associated with esophageal atresia. Dis Esophagus 2015; 28:211-5. [PMID: 24446921 DOI: 10.1111/dote.12176] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Congenital esophageal stenosis (CES) is a rare clinical condition but is frequently associated with esophageal atresia (EA). The aim of this study is to report the diagnosis, management, and outcome of CES associated with EA. Medical charts of CES-EA patients from Lille University Hospital, Sainte-Justine Hospital, and Montreal Children's Hospital were retrospectively reviewed. Seventeen patients (13 boys) were included. The incidence of CES in patients with EA was 3.6%. Fifteen patients had a type C EA, one had a type A EA, and one had an isolated tracheoesophageal fistula. Seven patients had associated additional malformations. The mean age at diagnosis was 11.6 months. All but two patients had non-specific symptoms such as regurgitations or dysphagia. One CES was diagnosed at the time of surgical repair of EA. In 12 patients, CES was suspected based on abnormal barium swallow. In the remaining four, the diagnostic was confirmed by esophagoscopy. Eleven patients were treated by dilation only (1-3 dilations/patient). Six patients underwent surgery (resection and anastomosis) because of failure of attempted dilations (1-7 dilations/patient). Esophageal perforation was encountered in three patients (18%). Three patients had histologically proven tracheobronchial remnants. CES associated with EA is frequent. A high index of suspicion for CES must remain in the presence of EA. Dilatation may be effective to treat some of them, but perforation is frequent. Surgery may be required, especially in CES secondary to ectopic tracheobronchial remnants.
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Talbot JN, Gligorov J, Nataf V, Montravers F, Huchet V, Michaud L, Ohnona J, Balogova S, Cussenot O, Daraï E, Lotz JP, Kerrou K. Current applications of PET imaging of sex hormone receptors with a fluorinated analogue of estradiol or of testosterone. THE QUARTERLY JOURNAL OF NUCLEAR MEDICINE AND MOLECULAR IMAGING : OFFICIAL PUBLICATION OF THE ITALIAN ASSOCIATION OF NUCLEAR MEDICINE (AIMN) [AND] THE INTERNATIONAL ASSOCIATION OF RADIOPHARMACOLOGY (IAR), [AND] SECTION OF THE SOCIETY OF... 2015; 59:4-17. [PMID: 25693420] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Currently, the most frequent approach in the oncologic applications of positron emission tomography (PET) is detecting the hypermetabolic activity of the cancer tissue. A more specific approach, which may be complementary, is detecting the overexpression of receptors. In this review article, we aim to evaluate the results that are currently available for PET imaging of the sex hormone receptors in clinical oncology. The indication of PET and now PET/CT has been more disputed in breast carcinoma than in many other primary cancers (e.g., lung, head and neck, colorectal, lymphoma). 18F-fluorodeoxyglucose (FDG), the glucose analogue for PET imaging, has a limited sensitivity to detect the primary breast tumors in case of lobular or in situ forms or small sized tumors localised on systematic mammography, and to identify minimal node invasion in the axilla. Using 16α-[¹⁸F]fluoro-17β-estradiol (FES), a fluorinated estradiol analogue, PET is able to detect the over-expression of the oestrogen receptor (ER) in lesions, at a whole-body level. FES and FDG appear complementary for a better diagnostic performance in staging locally advanced breast cancer or restaging recurrent or metastatic breast cancer. Another potential indication is predicting the response to starting or resuming hormone therapy in patients with metastatic breast cancer, in relation with the ER status of all lesions revealed by FES PET. In two retrospective studies, FDG PET was also able to predict the response to hormone therapy, on basis of a metabolic flare, observed either after 7-10 days of treatment or during an estradiol challenge. A prospective comparison of those approaches is warranted. One study reported predicting response to neoadjuvant chemotherapy thanks to a low value of FES SUV(max) or FES/FDG SUV(max) ratio. The presence of ER in uterine tumors, including the benign ones, in ovarian cancers or even in meningiomas, may have therapeutic consequences and FES PET could have a clinical utility in those settings; only initial results are available. The indication of PET and PET/CT has been even more disputed in prostate carcinoma, due to the lack of significant FDG uptake in most cases, at least before the castration-resistant stage. Using FDHT, a fluorinated testosterone analogue, PET is able to detect the over-expression of the androgen receptor (AR) in lesions, at a whole-body level. At least partly due to the rather large number of alternative tracers that are in development or even routinely available in some countries, few FDHT studies have been published until now. From absorbed dose values previously published for FES by the team of University of Washington School of Medicine at Seattle, and for FDHT by the teams of Memorial Sloan-Kettering Cancer Center at New York and of Washington University at St. Louis, we applied the coefficients of ICRP publication 103 and calculated an effective dose per unit of injected activity of 0.023 mSv/MBq for FES and 0.018 mSv/MBq for FDHT. The radiation exposure is of the same order of magnitude as with FDG.
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Mentrikoski JM, Duncan CL, Melanson A, Louden E, Allgier A, Michaud L, Rinaldi R. Factors Related to the Psychosocial Functioning of Youth With Neonatal Brachial Plexus Injuries. J Pediatr Psychol 2014; 40:285-96. [DOI: 10.1093/jpepsy/jsu086] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Schneider A, Gottrand F, Bellaiche M, Becmeur F, Lachaux A, Michel J, Dabadie A, Faure C, Philippe P, Vandenplas Y, Breton A, Dupont C, Gaudin J, Lamireau T, Muyshont L, Podevin G, Viola S, Bertrand V, Caldari D, Colinet S, Sokal E, Leteurtre E, Michaud L. SFCP CO-18 - Prévalence de l’œsophage de Barrett dans l’atrésie de l’œsophage. Arch Pediatr 2014. [DOI: 10.1016/s0929-693x(14)71656-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Rizzo C, Michaud L, Syldatk C, Hausmann R, De Domenico E, Lo Giudice A. Influence of salinity and temperature on the activity of biosurfactants by polychaete-associated isolates. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2014; 21:2988-3004. [PMID: 24170506 DOI: 10.1007/s11356-013-2259-8] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2013] [Accepted: 10/17/2013] [Indexed: 06/02/2023]
Abstract
Influence of different parameters on biosurfactant (BS) activity was carried out on strains that were isolated from the polychaetes Megalomma claparedei, Sabella spallanzanii and Branchiomma luctuosum and additional 30 strains that were previously identified as potential BS producers from crude oil enrichments of the same polychaete specimens. The selection of BS-producing strains from polychaete natural samples was carried out by using standard screening tests. The BS activity by each isolate was evaluated for the effect of salinity and temperature on emulsion production and surface tension reduction, during incubation in mineral medium supplemented with tetradecane or diesel oil. All isolates showed a similar time course of BS activity, and the latter was more influenced by salinity rather than temperature. Some of the BS producers belonged to genera that have not (i.e. Citricoccus, Cellulophaga, Tenacibaculum and Maribacter) or have poorly been (Psychrobacter, Vibrio, and Pseudoalteromonas) reported as able to produce BSs. This is remarkable as some of them have previously been detected in hydrocarbon-enriched samples. Results confirm that filter-feeding polychaetes are an efficient source for the isolation of BS producers.
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Garabedian C, Vaast P, Bigot J, Sfeir R, Michaud L, Gottrand F, Verpillat P, Coulon C, Subtil D, Houfflin Debarge V. [Esophageal atresia: prevalence, prenatal diagnosis and prognosis]. ACTA ACUST UNITED AC 2014; 43:424-30. [PMID: 24440126 DOI: 10.1016/j.jgyn.2013.11.014] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2013] [Revised: 11/10/2013] [Accepted: 11/19/2013] [Indexed: 01/29/2023]
Abstract
Esophageal atresia (EA) is a rare congenital malformation (1 in 2,500 to 3,500 births). Prenatal diagnosis (PN) is particularly interesting allowing search for associated malformations related to worse prognosis forms (reference ultrasound, MRI and amniocentesis) and planning the birth in an adapted medico-surgical center. Diagnosis of EA is usually suspected because of indirect and non-specific signs: association of polyhydramnios and absent or small stomach bubble. The visualization in ultrasound or MRI of cervical or thoracic fluid image corresponding to the expansion of the bottom of upper esophageal ("pouch sign") increases the specificity of diagnosis. However, prenatal diagnosis remains difficult and less than 50 % of EA are diagnosed prenatally. Biochemical analysis could improve these results. If EA is confirmed at birth, surgical management consists in a primary end-to-end anastomosis in first days of life, or in two-steps surgery if the defect is too large. Although current prognosis of EA is good, frequency of surgical complications and esophageal lesions secondary to gastroesophageal reflux justify a systematic and multidisciplinary extended follow-up.
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Fondi M, Orlandini V, Perrin E, Maida I, Bosi E, Papaleo MC, Michaud L, Lo Giudice A, de Pascale D, Tutino ML, Liò P, Fani R. Draft genomes of three Antarctic Psychrobacter strains producing antimicrobial compounds against Burkholderia cepacia complex, opportunistic human pathogens. Mar Genomics 2014; 13:37-8. [PMID: 24401162 DOI: 10.1016/j.margen.2013.12.009] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2013] [Revised: 12/13/2013] [Accepted: 12/23/2013] [Indexed: 10/25/2022]
Abstract
Herein we present the draft genomes of three Psychrobacter strains isolated from Antarctic sponges and able to inhibit the growth of bacteria belonging to the Burkholderia cepacia complex, responsible for infections of the respiratory system in patients affected by Cystic Fibrosis. The comparative analysis of the annotated genomes of these Psychrobacter strains highlighted their differences in terms of overall genomic content (e.g. shared gene sets) and allowed the identification of gene clusters hypothetically involved in the biosynthesis of antimicrobial compounds.
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Jacob A, Druelle D, Robert-Dehault A, Coopman S, Guimber D, Turck D, Gottrand F, Michaud L. O30 Étude prospective de la pose d’un bouton de gastrostomie en un temps par voie endoscopique chez l’enfant. NUTR CLIN METAB 2013. [DOI: 10.1016/s0985-0562(13)70302-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Maida I, Fondi M, Papaleo MC, Perrin E, Orlandini V, Emiliani G, de Pascale D, Parrilli E, Tutino ML, Michaud L, Lo Giudice A, Romoli R, Bartolucci G, Fani R. Phenotypic and genomic characterization of the Antarctic bacterium Gillisia sp. CAL575, a producer of antimicrobial compounds. Extremophiles 2013; 18:35-49. [DOI: 10.1007/s00792-013-0590-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2013] [Accepted: 09/26/2013] [Indexed: 10/26/2022]
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Orlandini V, Maida I, Fondi M, Perrin E, Papaleo MC, Bosi E, de Pascale D, Tutino ML, Michaud L, Lo Giudice A, Fani R. Genomic analysis of three sponge-associated Arthrobacter Antarctic strains, inhibiting the growth of Burkholderia cepacia complex bacteria by synthesizing volatile organic compounds. Microbiol Res 2013; 169:593-601. [PMID: 24231161 DOI: 10.1016/j.micres.2013.09.018] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2013] [Revised: 09/27/2013] [Accepted: 09/30/2013] [Indexed: 10/26/2022]
Abstract
In this work we analyzed the ability of three Arthrobacter strains (namely TB23, TB26 and CAL618), which were isolated from the Antarctic sponges Haliclonissa verrucosa and Lyssodendrix nobilis, to specifically inhibit the growth of a panel of 40 Burkholderia cepacia complex strains, representing a major cause of infections in patients that are affected by Cystic Fibrosis. The inhibitory activity was due to the synthesis of antimicrobial compounds, very likely volatile organic compounds (VOCs), and was partially dependent on the growth media that were used for Antarctic strains growth. The phylogenetic analysis revealed that two of them (i.e. CAL 618 and TB23) were very close and very likely belonged to the same Arthrobacter species, whereas the strain TB26 was placed in a distant branch. The genome of the strains TB26 and CAL618 was also sequenced and compared with that of the strain TB23. The analysis revealed that TB23 and CAL618 shared more genomic properties (GC content, genome size, number of genes) than with TB26. Since the three strains exhibited very similar inhibition pattern vs Bcc strains, it is quite possible that genes involved in the biosynthesis of antimicrobial compounds very likely belong to the core genome.
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Porporato EMD, Lo Giudice A, Michaud L, De Domenico E, Spanò N. Diversity and antibacterial activity of the bacterial communities associated with two Mediterranean sea pens, Pennatula phosphorea and Pteroeides spinosum (Anthozoa: Octocorallia). MICROBIAL ECOLOGY 2013; 66:701-714. [PMID: 23817604 DOI: 10.1007/s00248-013-0260-x] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/09/2013] [Accepted: 06/17/2013] [Indexed: 06/02/2023]
Abstract
A description of the bacterial communities associated with the Mediterranean pennatulids (sea pens) Pennatula phosphorea and Pteroeides spinosum from the Straits of Messina (Italy) is reported. The automated ribosomal intergenic spacer analysis showed a marked difference between coral (tissues and mucus) and non-coral (underlying sediment and surrounding water) habitats. The diversity of the coral-associated communities was more deeply analysed by sequencing the 16S rRNA genes of bacterial clones. P. phosphorea and P. spinosum harbour distinct bacterial communities, indicating the occurrence of species-specific coral-associated bacteria. In addition, only few phylotypes were shared between mucus and tissues of the same pennatulid species, suggesting that there might be a sort of microhabitat partitioning between the associated microbial communities. The predominance of Alphaproteobacteria was observed for the communities associated with both tissues and mucus of P. phosphorea (84 and 58.2 % of total sequences, respectively). Conversely, the bacterial community in the mucus layer of P. spinosum was dominated by Alphaproteobacteria (74.2 %) as opposed to the tissue library that was dominated by the Gammaproteobacteria and Mollicutes (40.6 and 35.4 %, respectively). The antibacterial activity of 78 bacterial isolates against indicator organisms was assayed. Active isolates (15.4 %), which predominantly affiliated to Vibrio spp., were mainly obtained from coral mucus. Results from the present study enlarge our knowledge on the composition and antibacterial activity of coral-associated bacterial communities.
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Papaleo MC, Romoli R, Bartolucci G, Maida I, Perrin E, Fondi M, Orlandini V, Mengoni A, Emiliani G, Tutino ML, Parrilli E, de Pascale D, Michaud L, Lo Giudice A, Fani R. Bioactive volatile organic compounds from Antarctic (sponges) bacteria. N Biotechnol 2013; 30:824-38. [DOI: 10.1016/j.nbt.2013.03.011] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2012] [Revised: 03/26/2013] [Accepted: 03/27/2013] [Indexed: 11/16/2022]
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Rizzo C, Michaud L, Hörmann B, Gerçe B, Syldatk C, Hausmann R, De Domenico E, Lo Giudice A. Bacteria associated with sabellids (Polychaeta: Annelida) as a novel source of surface active compounds. MARINE POLLUTION BULLETIN 2013; 70:125-133. [PMID: 23499536 DOI: 10.1016/j.marpolbul.2013.02.020] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2012] [Revised: 02/06/2013] [Accepted: 02/09/2013] [Indexed: 06/01/2023]
Abstract
A total of 69 bacteria were isolated from crude oil enrichments of the polychaetes Megalomma claparedei, Sabella spallanzanii and Branchiomma luctuosum, and screened for biosurfactant (BS) production by conventional methods. Potential BS-producers (30 isolates) were primarily selected due to the production of both interesting spots on thin layer chromatography (TLC) plates and highly stable emulsions (E₂₄ ≥ 50%). Only few strains grew on cetyltrimethylammonium bromide and blood agar plates, indicating the probable production of anionic surfactants. The 16S rRNA gene sequencing revealed that selected isolates mainly belonged to the CFB group of Bacteroidetes, followed by Gammaproteobacteria and Alphaproteobacteria. A number of BS-producers belonged to genera (i.e., Cellulophaga, Cobetia, Cohaesibacter, Idiomarina, Pseudovibrio and Thalassospira) that have been never reported as able to produce BSs, even if they have been previously detected in hydrocarbon-enriched samples. Our results suggest that filter-feeding Polychaetes could represent a novel and yet unexplored source of biosurfactant-producing bacteria.
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Delesalle D, Robert-Dehault A, Coopman S, Turck D, Gottrand F, Michaud L. Gastrostomie de décompression dans l’aérophagie pathologique chez l’enfant. Arch Pediatr 2013. [DOI: 10.1016/j.arcped.2013.02.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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49
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Michaud L, Fayoux P, Bonnevalle M, Gottrand F, Sfeir R. La place de l’aortopexie dans la trachéomalacie associée à l’atrésie de l’œsophage. Arch Pediatr 2013. [DOI: 10.1016/j.arcped.2013.02.030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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50
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Michaud L, Peneau A, Salleron J, Fumery M, Savoye G, Lerebours E, Turck D. Évolution à long terme d’une cohorte en population générale de patients atteints de maladie de Crohn à début pédiatrique. Arch Pediatr 2013. [DOI: 10.1016/j.arcped.2013.02.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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