http://publicationslist.org/data/jean-michel.panoff/atom.xml Jean-Michel PANOFFhttp://publicationslist.org/jean-michel.panoff$basepathfavicon.icoRecent additions to Jean-Michel PANOFF's PublicationsList.org pagehttp://publicationslist.org/publications.png2008-07-03T14:33:35Z http://publicationslist.org/jean-michel.panoff/refid2 2008-07-03T14:29:09Z

Lactobacillus johnsonii strains NCC533 and ATCC 33200 (the type strain of this species) differed significantly in gut residence time (12 versus 5 days) after oral feeding to mice. Genes affecting the long gut residence time of the probiotic strain NCC533 were targeted for analysis. We hypothesized that genes specific for this strain, which are expressed during passage of the bacterium through the ...<br/><br/>Emmanuel Denou, Raymond David Pridmore, Bernard Berger, Jean-Michel Panoff, Fabrizio Arigoni, Harald Brüssow (2008) <i>J Bacteriol</i> <i></i> <i></i> 190: 9 3161-3168<br/>

http://publicationslist.org/jean-michel.panoff/refid1 2008-07-03T14:29:09Z

Two independent isolates of the gut commensal Lactobacillus johnsonii were sequenced. They belonged to the same clonal lineage and differed mainly by a 40.8 kb-long prophage LJ771 of the Sfi11 phage lineage. LJ771 shares close DNA sequence identity with Lactobacillus gasseri prophages. LJ771 coexists as integrated prophage and excised circular phage DNA, but phage DNA packaged into extracellular p...<br/><br/> Denou, Pridmore, Ventura, Pittet, Zwahlen, Berger, Barretto, Panoff, Brüssow (2008) <i>J Bacteriol</i> <i></i> <i></i> : <br/>

http://publicationslist.org/jean-michel.panoff/refid5 2008-07-03T14:29:09Z

This study aimed to relate the acquisition of different antibiotic resistances and the corresponding physiological responses to cold stress of Lactobacillus delbrueckii subsp. bulgaricus strain CFL1. Six resistant mutants were spontaneously obtained and studied depending on the target of the antibiotic: (i) bacitracin and vancomycin (Bac(R), Van(R), wall synthesis), (ii) novobiocin (Nov(R), DNA re...<br/><br/>Jean-Paul Rivals, Catherine Béal, Bouachanh Thammavongs, Micheline Guéguen, Jean-Michel Panoff (2007) <i>Cryobiology</i> <i></i> <i></i> 55: 1 19-26<br/>

http://publicationslist.org/jean-michel.panoff/refid4 2008-07-03T14:29:09Z

Food industry tends towards the use of controlled microorganisms in order to improve its technologies including frozen starter production. The fungus Geotrichum candidum, which is currently found in various environments, is widely used as ripening agent in some specific cheese making process. In order to optimize the cryopreservation of this microorganism, freezing experiments were carried out usi...<br/><br/>G Missous, B Thammavongs, V Dieuleveux, M Guéguen, J M Panoff (2007) <i>Cryobiology</i> <i></i> <i></i> 55: 1 66-71<br/>

http://publicationslist.org/jean-michel.panoff/refid3 2008-07-03T14:29:09Z

Work with pathogens like Vibrio cholerae has shown major differences between genes expressed in bacteria grown in vitro and in vivo. To explore this subject for commensals, we investigated the transcription of the Lactobacillus johnsonii NCC533 genome during in vitro and in vivo growth using the microarray technology. During broth growth, 537, 626, and 277 of the 1,756 tested genes were expressed ...<br/><br/>Emmanuel Denou, Bernard Berger, Caroline Barretto, Jean-Michel Panoff, Fabrizio Arigoni, Harald Brüssow (2007) <i>J Bacteriol</i> <i></i> <i></i> 189: 22 8109-8119<br/>

http://publicationslist.org/jean-michel.panoff/refid6 2008-07-03T14:29:09Z

Freezing of prokaryotic and eukaryotic microorganisms is the main interest in the study of cold stress responses of living organisms. In parallel, applications which arise from this approach are of two types: (i) optimization of the frozen starters used in food processing; and (ii) improvement of the ex situ preservation of microorganisms in collections. Currently, cryopreservation of microorganis...<br/><br/>Bouachanh Thammavongs, Jean-Marc Poncet, Nathalie Desmasures, Micheline Guéguen, Jean-Michel Panoff (2004) <i>J Microbiol Methods</i> <i></i> <i></i> 57: 2 181-186<br/>

http://publicationslist.org/jean-michel.panoff/refid9 2008-07-03T14:29:09Z

Jean-Michel Panoff, Nathalie Desmasures, Bouachanh Thammavongs, Micheline Guéguen (2002) <i>Microbiology</i> <i></i> <i></i> 148: Pt 3 <br/>

http://publicationslist.org/jean-michel.panoff/refid8 2008-07-03T14:29:09Z

Geotrichum candidum is an ascomycetous anamorph yeast-like fungus found in various habitats. It is a component of the natural flora of milk and is used as a maturing agent for both soft and hard cheeses. This microorganism displays phenotypic variability and may act as an opportunist pathogen, causing geotrichosis. Cytological analysis of G. candidum strain ATCC 204307 showed this strain to have e...<br/><br/>Stéphanie Gente, Nathalie Desmasures, Cyril Jacopin, Ghislaine Plessis, Martine Beliard, Jean-Michel Panoff, Micheline Guéguen (2002) <i>Int J Food Microbiol</i> <i></i> <i></i> 76: 1-2 127-134<br/>

http://publicationslist.org/jean-michel.panoff/refid7 2008-07-03T14:29:09Z

Geotrichum candidum is a yeast-like fungus used as ripening starter in cheese making. The present study focused on chemical stress pretreatments affecting survival of G. candidum ATCC 204307 to freeze-thaw stress. Cryotolerance of G. candidum cells was induced by pretreatment with NaCl, CaCl2, or MgCl2, indicating heterologous phenotypic adaptation to freeze-thaw stress (- 20 to 25 degrees C) by o...<br/><br/>Ségolène Dubernet, Jean-Michel Panoff, Bouachanh Thammavongs, Micheline Guéguen (2002) <i>Int J Food Microbiol</i> <i></i> <i></i> 76: 3 215-221<br/>

http://publicationslist.org/jean-michel.panoff/refid10 2008-07-03T14:29:09Z

AIMS: Assessment of genetic diversity within the species Geotrichum candidum and development of tools to trace the strains that play an important role in the agro food industry. METHODS AND RESULTS: RAM-PCR and RAPD-PCR techniques were assessed for their ability to discriminate 57 strains of various morphotypes, substrates and geographical origin. The techniques were complementary and, when combin...<br/><br/>S Gente, N Desmasures, J-M Panoff, M Guéguen (2002) <i>J Appl Microbiol</i> <i></i> <i></i> 92: 3 491-501<br/>

http://publicationslist.org/jean-michel.panoff/refid11 2008-07-03T14:29:09Z

The effect of cold stress on Geotrichum candidum was investigated at chill and freezing temperatures. Specific growth rates were determined at various temperatures and plotted according to the Ratkowsky and Arrhenius equations. The obtained profiles led to the determination of characteristics including the activation energy and notional minimum temperatures. At temperatures below the optimum singl...<br/><br/>B Thammavongs, J M Panoff, M Guéguen (2000) <i>Int J Food Microbiol</i> <i></i> <i></i> 60: 1 99-105<br/>

http://publicationslist.org/jean-michel.panoff/refid12 2008-07-03T14:29:09Z

This study was conducted to investigate the ability of cryoprotective chemicals to induce phenotypic cryoadaptation in Lactobacillus delbrueckii ssp. bulgaricus CIP 101027T. Tolerance to negative temperature stress (freezing at -20 degrees C and thawing at 37 degrees C) was induced by pretreatment with Me(2)SO, glycerol, lactose, sucrose, and trehalose. Interestingly, Me(2)SO has a significantly g...<br/><br/>J M Panoff, B Thammavongs, M Guéguen (2000) <i>Cryobiology</i> <i></i> <i></i> 40: 3 264-269<br/>

http://publicationslist.org/jean-michel.panoff/refid13 2008-07-03T14:29:09Z

Salt-induced genes in the cyanobacterium Anabaena sp. strain PCC 7120 were identified by use of a Tn5-based transposon bearing luxAB as a reporter. The genomic sequence adjacent to one site of insertion of the transposon was identical in part to the sequence of the lti2 gene, which was previously identified in a differential screen for cold-induced transcripts in Anabaena variabilis. The lti2-like...<br/><br/>S H Schwartz, T A Black, K Jäger, J M Panoff, C P Wolk (1998) <i>J Bacteriol</i> <i></i> <i></i> 180: 23 6332-6337<br/>

http://publicationslist.org/jean-michel.panoff/refid14 2008-07-03T14:29:09Z

The diversity of the prokaryotes that have been studied, combined with the many different effects of low temperature, has led to an extensive literature concerning cold stress responses in mesophilic bacteria. The aim of this review is to discuss the effects of cold on the behavior of bacteria. The following three responses will be described: (i) biochemical modifications consisting first of membr...<br/><br/>J M Panoff, B Thammavongs, M Guéguen, P Boutibonnes (1998) <i>Cryobiology</i> <i></i> <i></i> 36: 2 75-83<br/>

http://publicationslist.org/jean-michel.panoff/refid15 2008-07-03T14:29:09Z

Transfer of Enterococcus faecalis to a cold temperature (8 degrees C for 4 to 30 h) led to increased expression of 11 cold shock proteins (CSPs). Furthermore, this mesophilic prokaryote synthesized 10 cold acclimation proteins, five of them distinct from CSPs, during continuous growth (4 days) at the same temperature (8 degrees C).<br/><br/>J M Panoff, D Corroler, B Thammavongs, P Boutibonnes (1997) <i>J Bacteriol</i> <i></i> <i></i> 179: 13 4451-4454<br/>

http://publicationslist.org/jean-michel.panoff/refid16 2008-07-03T14:29:09Z

Growth at low positive temperatures and induced phenotypic resistance to extreme cold temperature (freezing/thawing cycles) of Enterococcus faecalis were investigated. The effect of low temperatures on the specific growth rates was studied; use of Arrhenius profile and Ratkovsky 'square-root' model allowed determination of the 'temperature characteristic' (mu approximately equal to 13,800 cal mol-...<br/><br/>B Thammavongs, D Corroler, J M Panoff, Y Auffray, P Boutibonnes (1996) <i>Lett Appl Microbiol</i> <i></i> <i></i> 23: 6 398-402<br/>

http://publicationslist.org/jean-michel.panoff/refid17 2008-07-03T14:29:09Z

Like in other organisms tested to date, adapted cells of Lactococcus lactis subsp. lactis IL1403 pretreated at 42 degrees C for 30 min develop a thermotolerant state, i.e. an increased ability to survive subsequent exposure to a lethal challenge temperature (52 degrees C for 15 or 30 min). In different cellular systems, chemicals as diverse as divalent metal salts, natural or synthetic compounds t...<br/><br/>P Boutibonnes, V Bisson, B Thammavongs, A Hartke, J M Panoff, A Benachour, Y Auffray (1995) <i>Int J Food Microbiol</i> <i></i> <i></i> 25: 1 83-94<br/>

http://publicationslist.org/jean-michel.panoff/refid18 2008-07-03T14:29:09Z

Mutants of Anabaena sp. strain PCC 7120 that are incapable of sustained growth with air as the sole source of nitrogen were generated by using Tn5-derived transposons. Nitrogenase was expressed only in mutants that showed obvious morphological signs of heterocyst differentiation. Even under rigorously anaerobic conditions, nitrogenase was not synthesized in filaments that were unable to develop he...<br/><br/>A Ernst, T Black, Y Cai, J M Panoff, D N Tiwari, C P Wolk (1992) <i>J Bacteriol</i> <i></i> <i></i> 174: 19 6025-6032<br/>

http://publicationslist.org/jean-michel.panoff/refid19 2008-07-03T14:29:09Z

Anabaena, a filamentous cyanobacterium, is of developmental interest because, when deprived of fixed nitrogen, it shows patterned differentiation of N2-fixing cells called heterocysts. To help elucidate its early responses to a decrease in nitrogen, we used a derivative of transposon Tn5 to generate transcriptional fusions of promoterless bacterial luciferase genes, luxAB, to the Anabaena genome. ...<br/><br/>C P Wolk, Y Cai, J M Panoff (1991) <i>Proc Natl Acad Sci U S A</i> <i></i> <i></i> 88: 12 5355-5359<br/>

http://publicationslist.org/jean-michel.panoff/refid20 2008-07-03T14:29:09Z

The degree of retention of whole cells of Synechocystis strain PCC 6803 on DEAE-cellulose columns was shown to depend on their content of exopolysaccharides, which are at least in part responsible for the external negative charge of the cells. This feature was used for the isolation of mutants modified in the apparent viscosity caused by these macromolecular constituents. When a wild-type suspensi...<br/><br/> Panoff, Joset (1989) <i>Appl Environ Microbiol</i> <i></i> <i></i> 55: 6 1452-1456<br/>