Biomerieux, Inc.

Biomerieux Sa

Claude Mabilat

Philippe Cros

Jean-Pierre Claverys

Bernard F Mandrand

Christian Pichot

Jean-Claude Pechere

Bruno Colin

Didier Raoult

Patrick Broyer

Philippe L Cleuziat

Abdelhamid Elaissari

Marie-Helene Charles

Marc Rodrigue

Patrice A Allibert

Francedillaois Mallet

Marie-Noelle Erout

Sandra Incardona

Richard Christen

Lise Santoro

Raoult Didier

Brunehild Sallen

Raymond Ruimy

A method for aqueous phase nucleic acid isolation from a sample, comprising a step of nucleic acid adsorption on a particulate substrate, is disclosed. The method comprises an adsorption reagent preparation step (a) that includes a sol consisting of a aqueous continuous phase and a dispersed particulate substrate phase including a functionalized particulate polymer prepared by polymerizing (1) a first water-soluble acrylamide or acrylamide derivative monomer, (2) at least one cross-linking agent and (3) at least one second water-soluble, cationic and functional monomer, said polymer having a predetermined lower critical solubility temperature (LCST) of 25-45&deg; C.; a contact step (b) wherein the adsorption reagent is contacted with the sample containing the nucleic acid; an adsorption step (c) wherein, to carry out the contact step (b), at least one parameter is selected for the reaction medium, said parameters being a pH no higher than 7, an ionic strength no higher than 10 M, and a temperature lower than the polymer LCST; a separation step (d) wherein the dispersed phase is separated from the continuous phase, optionally after it has been observed that adsorption has occurred; and a desorption step (e) wherein the nucleic acid is desorbed from the particulate substrate by increasing the ionic strength until an ionic strength higher than 10 M is achieved.

Nucleic acid isolation

An apparatus including at least one sonotrode ( ) designed to generate ultrasound of variable power in at least one biological sample ( ) containing cells to be lysed, the sample ( ) being contained in at least one receptacle ( or ) such that the sonotrode ( ) is in direct contact with the receptacle(s) ( ). Also disclosed is a method for using ultrasound to lyse a biological sample ( ) contained in a receptacle ( ), which includes placing the receptacle ( ) in direct contact with the sonotrode ( ), and activating the sonotrode ( ) for long enough to lyse the cells in the sample ( ) but preserve the DNA and/or RNA molecules released for subsequent operations, e.g. amplification. The invention is particularly applicable in the discipline of molecular biology.

Method and apparatus for ultrasonic lysis of biological cells

Detection of bacteria of genus Listeria using nucleic probe

The invention relates to probes and primers derived from the 16S ribosomal RNA of pathogenic species of the genus Corynebacteria. In addition, a method of detecting and/or identifying pathogenic species of the genus Corynebacteria utilizing the probes and primers is disclosed.

Nucleotide fragment of the 16S ribosomal RNA of corynebacteria, derived

Nucleotide fragments capable of hybridizing specifically to rickettsia

Nucleotide fragment of DNA, whose nucleotide sequence is included in the gene of the species of the genus Mycobacterium, coding for the 65-kD mycobacterial antigen, containing regions which are homologous in practically all species of the genus Mycobacterium, and at least one species-specific variable region, characterized in that said fragment is chosen from fragments whose nucleotide sequences possess at least 70% homology, and preferably at least 85% homology, with a predetermined sequence or its complementary sequence, said predetermined sequence beginning at nucleotide 438 and ending at nucleotide 751 of said gene coding for said antigen of all species of mycobacteria except for the species M. tuberculosis, M. bovis BCG, M. avium, M. paratuberculosis, M. fortuitum, M. malmoense, M. leprae, M. kansaii and M. marinum.

DNA fragments of mycobacteria, amplification primers hybridization

The invention relates to a single-stranded oligonucleotide chosen from oligonucleotides having a sequence of at least 12 consecutive nucleotide units which is included in one of the sequences SEQ ID NO: 1 to SEQ ID NO: 52, and from the oligonucleotides complementary to these oligonucleotides, and to the applications of this oligonucleotide for detecting enterobacteria.

Detection of enterobacteria

The invention relates to a fragment of the genomic DNA of Streptococcus pneumoniae, a probe capable of specifically hybridizing with the genomic DNA of Screptococcus pneumoniae, a specific primer for the amplification, by polymerization, of the genomic DNA, a reagent and a method which are used with the probe and, optionally, the primer, for specifically detecting Streptococcus pneumoniae in a biological sample. The probe of the invention is a nucleotide sequence having at least 70% homology with at least a portion of a consensus sequence of the genomic DNA of Streptococcus pneumoniae, this consensus sequence being chosen from the nucleotide sequences SEQ ID NO 2, SEQ ID NO 3, SEQ ID NO 4, which are identified in the description, and their respective complementary sequences.

Genomic DNA fragment of Streptococcus pneumontiae, hybridization probe,

The invention relates to a fragment of the genomic DNA of Strepeococcus pneumoniae, a probe capable of specifically hybridizing with the genomic DNA of Streptococcus pneumoniae, a specific primer for the amplification, by polymerization, of the genomic DNA, a reagent and a method which are used with the probe and, optionally, the primer, for specifically detecting Streptococcus pneumoniae in a biological sample. The probe of the invention is a nucleotide sequence having at least 70% homology with at least a portion of a consensus sequence of the genomic DNA of Streptococcus pneumoniae, this consensus sequence being chosen from the nucleotide sequences SEQ ID NO 2, SEQ ID NO 3, SEQ ID NO 4, which are identified in the description, and their respective complementary sequences.

Genomic DNA fragment of Streptococcus pneumoniae, hybridization probe,

Device for capturing a target molecule for the purpose of detecting it and/or assaying it, including a solid support on which is immobilized a ligand, the ligand being provided in the form of a conjugate resulting from the covalent coupling of a polymer with a plurality of molecules of the ligand. The polymer is an N-vinylpyrrolidone copolymer, and the conjugate is immobilized on the solid support by adsorption. When the ligand is capable of forming a complex with the target, the device is specific for a given target. When the device comprises, in addition, a bifunctional reagent capable of forming a complex, on the one hand, with the ligand and, on the other hand, with the target, the support on which the ligand is immobilized constitutes a universal capturing system.

Device for the capture of target molecules, and capturing process using

Nucleotide fragment of the 23S ribosomal RNA of mycobacteria, derived

A procedure for detecting single-stranded nucleotide sequences in a sample is disclosed wherein a passively fixed capture probe is used in concert with a non-radioactively labelled detection probe in a sandwich hybridization technique.

Sandwich hybridization assays using very short capture probes

The invention relates to a fragment of the genomic DNA of Streptococcus pneumoniae, a probe capable of specifically hybridizing with the genomic DNA of Streptococcus pneumoniae, a specific primer for the amplification, by polymerization, of the genomic DNA, a reagent and a method which are used with the probe and, optionally, the primer, for specifically detecting Streptococcus pneumoniae in a biological sample. The probe of the invention is a nucleotide sequence having at least 70% homology with at least a portion of a consensus sequence of the genomic DNA of Streptococcus pneumoniae, this consensus sequence being chosen from the nucleotide sequences SEQ ID NO 2, SEQ ID NO 3, SEQ ID NO 4, which are identified in the description, and their respective complementary sequences.

Nucleotide fragment of DNA, whose nucleotide sequence is included in the gene of the species of the genus Mycobacterium, coding for the 65-kD mycobacterial antigen, containing regions which are homologous in practically all species of the genus Mycobacterium, and at least one species-specific variable region, characterized in that said fragment is chosen from fragments whose nucleotide sequences possess at least 70% homology, and preferably at least 85% homology, with a predetermined sequence or its complementary sequence, said predetermined sequence beginning at nucleotide 438 and ending at nucleotide 751 of said gene coding for said antigen of all species of mycobacteria except for the species M. tuberculosis, M. bovis BCG, M. avium, M. paratuberculosis, M. fortuitum, M. malmoense, M. leprae, M. kansaii and M. marinurn.

Growing community of inventors

Villeurbanne, France

Claude Mabilat