Pierre Nicolas

Antibiotic susceptibility and characteristics of Neisseria meningitidis isolates from the African meningitis belt, 2000 to 2006 : phenotypic and genotypic perspectives (2009)

Thulin Hedberg, Sara, Fredlund, Hans, Nicolas, Pierre, Caugant, Dominique A, Olcén, Per, Unemo, Magnus

Up-to-date information regarding the antibiotic susceptibility of Neisseria meningitidis strains from African countries is highly limited. Our aim was to comprehensively describe the antibiotic...

Aminopeptidase B, a glucagon-processing enzyme: site directed mutagenesis of the Zn2+-binding motif and molecular modelling (2007)

Pham, Viet-Laï, Cadel, Marie-Sandrine, Gouzy-Darmon, Cécile, Hanquez, Chantal, Beinfeld, Margery C, Nicolas, Pierre, ...

Abstract Background Aminopeptidase B (Ap-B; EC 3.4.11.6) catalyzes the cleavage of basic residues at the N-terminus of peptides and processes glucagon into miniglucagon. The enzyme exhibits, in vitro...

Extensive horizontal transfer of core genome genes between two Lactobacillusspecies found in the gastrointestinal tract (2007)

Nicolas, Pierre, Bessières, Philippe, Ehrlich, S Dusko, Maguin, Emmanuelle, Van De Guchte, Maarten

Abstract Background While genes that are conserved between related bacterial species are usually thought to have evolved along with the species, phylogenetic trees reconstructed for individual genes...

The Stem Cell Population of the Human Colon Crypt: Analysis via Methylation Patterns (2007)

Pierre Nicolas, Kyoung-Mee Kim, Darryl Shibata, Simon Tavaré

The analysis of methylation patterns is a promising approach to investigate the genealogy of cell populations in an organism. In a stem cell–niche scenario, sampled methylation patterns are the...

The Stem Cell Population of the Human Colon Crypt: Analysis via Methylation Patterns (2007)

Pierre Nicolas, Kyoung-Mee Kim, Darryl Shibata, Simon Tavare

The analysis of methylation patterns is a promising approach to investigate the genealogy of cell populations in an organism. In a stem cell niche scenario, sampled methylation patterns are the...

A model-based approach to selection of tag SNPs (2006)

Nicolas, Pierre, Sun, Fengzhu, Li, Lei M

Abstract Background Single Nucleotide Polymorphisms (SNPs) are the most common type of polymorphisms found in the human genome. Effective genetic association studies require the identification of...

Post-translational amino acid racemization in the frog skin peptide deltorphin I in the secretion granules of cutaneous serous glands. (2006)

Auvynet, Constance, Seddiki, Nabila, Dunia, Irene, Nicolas, Pierre, Amiche, Mohammed, Lacombe, Claire

The dermal glands of the South American hylid frog Phyllomedusa bicolor synthesize and expel huge amounts of cationic, alpha-helical, 24- to 33-residue antimicrobial peptides, the dermaseptins B....

BMC Bioinformatics Methodology article A model-based approach to selection of tag SNPs (2006)

Pierre Nicolas, Fengzhu Sun, Lei M Li, Biomed Central

© 2006 Nicolas et al; licensee BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License

Analysis and modelling of effects of leaf rust and Septoria tritici blotch on wheat growth (2004)

Robert, Corinne, Bancal, Marie-Odile, Nicolas, Pierre, Lannou, Christian, Ney, Bertrand

A model to predict Septoria tritici blotch (STB) and leaf rust effects on wheat growth was constructed and evaluated in two steps. At the leaf scale, Bastiaans’ approach that predicts the relative...

Analysis and modelling of effects of leaf rust and Septoria tritici blotch on wheat growth (2004)

Robert, Corinne, Bancal, Marie-Odile, Nicolas, Pierre, Lannou, Christian, Ney, Bertrand

A model to predict Septoria tritici blotch (STB) and leaf rust effects on wheat growth was constructed and evaluated in two steps. At the leaf scale, Bastiaans’ approach that predicts the relative...

MuGeN: simultaneous exploration of multiple genomes and computer analysis results (2003)

Hoebeke, Mark, Nicolas, Pierre, Bessières, Philippe

Motivation: The availability of increasing amounts of sequence data about completely sequenced genomes spurs the development of new methods in the fields of automated annotation, and of comparative...

Mining Bacillus subtilis chromosome heterogeneities using hidden Markov models (2002)

Nicolas, Pierre, Bize, Laurent, Muri, Florence, Hoebeke, Mark, Rodolphe, François, Ehrlich, S. Dusko, ...

We present here the use of a new statistical segmentation method on the Bacillus subtilis chromosome sequence. Maximum likelihood parameter estimation of a hidden Markov model, based on the...

Roles of Diversifying Selection and Coordinated Evolution in the Evolution of Amphibian Antimicrobial Peptides (2002)

Duda, Thomas F., Vanhoye, Damien, Nicolas, Pierre

Antimicrobial peptides are expressed in the skin of amphibians and are used to prevent infection by microorganisms. Frog species store distinct collections of antimicrobial peptides that show...

Versailles cedex Contents (2001)

Pierre Nicolas, Florence Muri-majoube

Programs to segment DNA sequences into homogeneous regions / Recherche d’HOMogénéités dans une séquence d’ADN

Fit genotypes and escape variants of subgroup III Neisseria meningitidis during three pandemics of epidemic meningitis

Zhu, Peixuan, Van Der Ende, Arie, Falush, Daniel, Brieske, Norbert, Morelli, Giovanna, Linz, Bodo, ...

The genetic variability at six polymorphic loci was examined within a global collection of 502 isolates of subgroup III, serogroup A Neisseria meningitidis. Nine “genoclouds” were identified,...

The 1998 Senegal Epidemic of Meningitis Was Due to the Clonal Expansion of A:4:P1.9, Clone III-1, Sequence Type 5 Neisseria meningitidis Strains

Nicolas, Pierre, Raphenon, Georges, Guibourdenche, Martine, Decousset, Laurent, Stor, Richard, Gaye, Abou Beckr

Between January and April 1998, a meningitis outbreak due to serogroup A meningococcus took place in Senegal. The outbreak began in Gandiaye, 165 km to the east of Dakar, and progressed towards the...

Mining Bacillus subtilis chromosome heterogeneities using hidden Markov models

Nicolas, Pierre, Bize, Laurent, Muri, Florence, Hoebeke, Mark, Rodolphe, François, Ehrlich, S. Dusko, ...

We present here the use of a new statistical segmentation method on the Bacillus subtilis chromosome sequence. Maximum likelihood parameter estimation of a hidden Markov model, based on the...

Susceptibilities of Mycoplasma fermentans and Mycoplasma hyorhinis to Membrane-Active Peptides and Enrofloxacin in Human Tissue Cell Cultures

Nir-Paz, Ran, Prévost, Marie-Christine, Nicolas, Pierre, Blanchard, Alain, Wróblewski, Henri

Mycoplasmas, which are bacteria that are devoid of a cell wall and which belong to the class Mollicutes, are pathogenic for humans and animals and are frequent contaminants of tissue cell cultures....

Interlaboratory Comparison of Agar Dilution and Etest Methods for Determining the MICs of Antibiotics Used in Management of Neisseria meningitidis Infections

Vázquez, Julio A., Arreaza, Luisa, Block, Colin, Ehrhard, Ingrid, Gray, Stephen J., Heuberger, Sigrid, ...

Previous studies have shown that there is considerable variation in the methods and media used to determine the susceptibility of Neisseria meningitidis to antimicrobial agents in different...

The Mr 80,000 common forms of neurophysin and vasopressin from bovine neurohypophysis have corticotropin- and β-endorphin-like sequences and liberate by proteolysis biologically active corticotropin

Lauber, Marc, Nicolas, Pierre, Boussetta, Hamadi, Fahy, Christine, Béguin, Pierre, Camier, Maryse, ...

We have tested the hypothesis that the high Mr forms common to both neurophysin and vasopressin detected in bovine neurohypophysis extracts (Nicolas, P., Camier, M., Lauber, M., Masse, M.-J. O.,...

Immunological identification of high molecular weight forms common to bovine neurophysin and vasopressin

Nicolas, Pierre, Camier, Maryse, Lauber, Marc, Masse, Marie-J. O., Möhring, Jan, Cohen, Paul

Extracts of bovine neurohypophysis made in acid/ethanol solution containing protease inhibitors were fractionated by two successive filtrations on Sephadex G-75 columns equilibrated in the presence...

Molecular Epidemiology of Neisseria meningitidis Isolated in the African Meningitis Belt between 1988 and 2003 Shows Dominance of Sequence Type 5 (ST-5) and ST-11 Complexes

Nicolas, Pierre, Norheim, Gunnstein, Garnotel, Eric, Djibo, Saacou, Caugant, Dominique A.

At the two World Health Organization Collaborating Centers for Reference and Research on Meningococci in Marseilles, France, and Oslo, Norway, the multilocus sequence typing technique was used for...

Fit genotypes and escape variants of subgroup III Neisseria meningitidis during three pandemics of epidemic meningitis

Zhu, Peixuan, Van Der Ende, Arie, Falush, Daniel, Brieske, Norbert, Morelli, Giovanna, Linz, Bodo, ...

The genetic variability at six polymorphic loci was examined within a global collection of 502 isolates of subgroup III, serogroup A Neisseria meningitidis. Nine “genoclouds” were identified,...

The 1998 Senegal Epidemic of Meningitis Was Due to the Clonal Expansion of A:4:P1.9, Clone III-1, Sequence Type 5 Neisseria meningitidis Strains

Nicolas, Pierre, Raphenon, Georges, Guibourdenche, Martine, Decousset, Laurent, Stor, Richard, Gaye, Abou Beckr

Between January and April 1998, a meningitis outbreak due to serogroup A meningococcus took place in Senegal. The outbreak began in Gandiaye, 165 km to the east of Dakar, and progressed towards the...

Mining Bacillus subtilis chromosome heterogeneities using hidden Markov models

Nicolas, Pierre, Bize, Laurent, Muri, Florence, Hoebeke, Mark, Rodolphe, François, Ehrlich, S. Dusko, ...

We present here the use of a new statistical segmentation method on the Bacillus subtilis chromosome sequence. Maximum likelihood parameter estimation of a hidden Markov model, based on the...

Susceptibilities of Mycoplasma fermentans and Mycoplasma hyorhinis to Membrane-Active Peptides and Enrofloxacin in Human Tissue Cell Cultures

Nir-Paz, Ran, Prévost, Marie-Christine, Nicolas, Pierre, Blanchard, Alain, Wróblewski, Henri

Mycoplasmas, which are bacteria that are devoid of a cell wall and which belong to the class Mollicutes, are pathogenic for humans and animals and are frequent contaminants of tissue cell cultures....

Interlaboratory Comparison of Agar Dilution and Etest Methods for Determining the MICs of Antibiotics Used in Management of Neisseria meningitidis Infections

Vázquez, Julio A., Arreaza, Luisa, Block, Colin, Ehrhard, Ingrid, Gray, Stephen J., Heuberger, Sigrid, ...

Previous studies have shown that there is considerable variation in the methods and media used to determine the susceptibility of Neisseria meningitidis to antimicrobial agents in different...

The Mr 80,000 common forms of neurophysin and vasopressin from bovine neurohypophysis have corticotropin- and β-endorphin-like sequences and liberate by proteolysis biologically active corticotropin

Lauber, Marc, Nicolas, Pierre, Boussetta, Hamadi, Fahy, Christine, Béguin, Pierre, Camier, Maryse, ...

We have tested the hypothesis that the high Mr forms common to both neurophysin and vasopressin detected in bovine neurohypophysis extracts (Nicolas, P., Camier, M., Lauber, M., Masse, M.-J. O.,...

Immunological identification of high molecular weight forms common to bovine neurophysin and vasopressin

Nicolas, Pierre, Camier, Maryse, Lauber, Marc, Masse, Marie-J. O., Möhring, Jan, Cohen, Paul

Extracts of bovine neurohypophysis made in acid/ethanol solution containing protease inhibitors were fractionated by two successive filtrations on Sephadex G-75 columns equilibrated in the presence...

Molecular Epidemiology of Neisseria meningitidis Isolated in the African Meningitis Belt between 1988 and 2003 Shows Dominance of Sequence Type 5 (ST-5) and ST-11 Complexes

Nicolas, Pierre, Norheim, Gunnstein, Garnotel, Eric, Djibo, Saacou, Caugant, Dominique A.

At the two World Health Organization Collaborating Centers for Reference and Research on Meningococci in Marseilles, France, and Oslo, Norway, the multilocus sequence typing technique was used for...

The Stem Cell Population of the Human Colon Crypt: Analysis via Methylation Patterns

Nicolas, Pierre, Kim, Kyoung-Mee, Shibata, Darryl, Tavaré, Simon

The analysis of methylation patterns is a promising approach to investigate the genealogy of cell populations in an organism. In a stem cell–niche scenario, sampled methylation patterns are the...

Population Structure of the Fish-Pathogenic Bacterium Flavobacterium psychrophilum▿

Nicolas, Pierre, Mondot, Stanislas, Achaz, Guillaume, Bouchenot, Catherine, Bernardet, Jean-François, Duchaud, Eric

Flavobacterium psychrophilum is currently one of the main bacterial pathogens hampering the productivity of salmonid farming worldwide, and its control mainly relies on antibiotic treatments. To...

Serogroup W135 Meningococcal Meningitis, Northern Cameroon, 2007–2008

Massenet, Denis, Inrombe, Jermias, Mevoula, Dave-Etienne, Nicolas, Pierre

We analyzed results of recent microbiologic surveillance of meningitis in northern Cameroon. During the 2007 and 2008 meningitis seasons, all 57 identified meningococcal isolates were serogroup W135....

Transcriptional landscape estimation from tiling array data using a model of signal shift and drift

Nicolas, Pierre, Leduc, Aurélie, Robin, Stéphane, Rasmussen, Simon, Jarmer, Hanne, Bessières, Philippe

Motivation: High-density oligonucleotide tiling array technology holds the promise of a better description of the complexity and the dynamics of transcriptional landscapes. In organisms such as...

Recent Increase in Meningitis Caused by Neisseria meningitidis Serogroups A and W135, Yaoundé, Cameroon

Fonkoua, Marie-Christine, Taha, Muhamed-Kheir, Nicolas, Pierre, Cunin, Patrick, Alonso, Jean-Michel, Bercion, Raymond, ...

From 1991 to 1998, Neisseria meningitidis serogroups A, B, and C represented 2%-10% of strains isolated from cases of bacterial meningitis in Yaoundé. During 1999 to 2000, the percentage of...

Antibiotic Susceptibility and Characteristics of Neisseria meningitidis Isolates from the African Meningitis Belt, 2000 to 2006: Phenotypic and Genotypic Perspectives▿

Hedberg, Sara Thulin, Fredlund, Hans, Nicolas, Pierre, Caugant, Dominique A., Olcén, Per, Unemo, Magnus

Up-to-date information regarding the antibiotic susceptibility of Neisseria meningitidis strains from African countries is highly limited. Our aim was to comprehensively describe the antibiotic...