205 results about "Neisseria meningitidis" patented technology

Multivalent immunogenic molecules comprise a carrier molecule containing at least one functional T-cell epitope and multiple different carbohydrate fragments each linker to the carrier molecule and each containing at least one functional B-cell epitope. The carrier molecule inputs enhanced immunogenicity to the multiple carbohydrate fragments. The carbohydrate fragments may be capsular oligosaccharide fragments from Streptococcus pneumoniae, which may be serotypes 1, 4, 5, 6B, 9V, 14, 18C, 19F or 23F, or Neisseria meningitidis, which may be serotype A, B, C, W-135 or Y. Such oligosaccharide fragments may be sized from 2 to 5 kDa. Alternatively, the carbohydrate fragments may be fragments of carbohydrate-based tumor antigens, such as Globo H, LeY or STn. The multivalent molecules may be produced by random conjugation or site-directed conjugation of the carbohydrate fragments to the carrier molecule. The multivalent molecules may be employed in vaccines or in the generation of antibodies for diagnostic application.

An injectable immunogenic composition comprising capsular saccharides from at least two of serogroups A, C, W135 and Y of Neisseria meningitidis, wherein said capsular saccharides are conjugated to carrier protein(s) and / or are oligosaccharides, and wherein (i) the composition comprises <50 mug meningococcal saccharide per dose, and / or (ii) the composition further comprises an antigen from one or more of: (a) serogroup B N. meningitidis; (b) Haemophilus influenzae type B; and / or (c) Streptococcus pneumoniae. Saccharide antigens in the compositions are generally conjugated to a carrier.

Various specific meningococcal proteins are disclosed. The invention provides related polypeptides, nucleic acids, antibodies and methods. These can all be used in medicine for treating or preventing disease and / or infection caused by meningococcus, such as bacterial meningitis.

DNA-based methods employing amplification primers or probes for detecting, identifying, and quantifying in a test sample DNA from (i) any bacterium, (ii) the species Streptococcus agalactiae, Staphylococcus saprophyticus, Enterococcus faecium, Neisseria meningitidis, Listeria monocytogenes and Candida albicans, and (iii) any species of the genera Streptococcus, Staphylococcus, Enterococcus, Neisseria and Candida are disclosed. DNA-based methods employing amplification primers or probes for detecting, identifying, and quantifying in a test sample antibiotic resistance genes selected from the group consisting of blatem, blarob, blashv, blaoxa, blaZ, aadB, aacC1, aacC2, aacC3, aacA4, aac6'-lla, ermA, ermB, ermC, mecA, vanA, vanB, vanC, satA, aac(6')-aph(2''), aad(6'), vat, vga, msrA, sul and int are also disclosed. The above microbial species, genera and resistance genes are all clinically relevant and commonly encountered in a variety of clinical specimens. These DNA-based assays are rapid, accurate and can be used in clinical microbiology laboratories for routine diagnosis. These novel diagnostic tools should be useful to improve the speed and accuracy of diagnosis of microbial infections, thereby allowing more effective treatments. Diagnostic kits for (i) the universal detection and quantification of bacteria, and / or (ii) the detection, identification and quantification of the above-mentioned bacterial and fungal species and / or genera, and / or (iii) the detection, identification and quantification of the above-mentioned antibiotic resistance genes are also claimed.

The present invention generally provides methods and compositions for eliciting an immune response against Neisseria spp. bacteria in a subject, particularly against a Neisseria meningitidis serogroup B strain.check for moving around

DNA-based methods employing amplification primers or probes for detecting, identifying, and quantifying in a test sample DNA from (i) any bacterium, (ii) the species Streptococcus agalactiae, Staphylococcus saprophyticus, Enterococcus faecium, Neisseria meningitidis, Listeria monocytogenes and Candida albicans, and (iii) any species of the genera Streptococcus, Staphylococcus, Enterococcus, Neisseria and Candida are disclosed. DNA-based methods employing amplification primers or probes for detecting, identifying, and quantifying in a test sample antibiotic resistance genes selected from the group consisting of blatem, blarob, blashv, blaoxa, blaZ, aadB, aacC1, aacC2, aacC3, aacA4, aac6′-IIa, ermA, ermB, ermC, mecA, vanA, vanB, vanC, satA, aac(6′)-aph(2″), aad(6), vat, vga, msrA, sul and int are also disclosed. The above microbial species, genera and resistance genes are all clinically relevant and commonly encountered in a variety of clinical specimens. These DNA-based assays are rapid, accurate and can be used in clinical microbiology laboratories for routine diagnosis. These novel diagnostic tools should be useful to improve the speed and accuracy of diagnosis of microbial infections, thereby allowing more effective treatments. Diagnostic kits for (i) the universal detection and quantification of bacteria, and / or (ii) the detection, identification and quantification of the above-mentioned bacterial and fungal species and / or genera, and / or (iii) the detection, identification and quantification of the above-mentioned antibiotic resistance genes are also claimed.

The present invention generally provides methods and vaccines for the prevention of diseases caused by Neisseria meningitidis bacteria, particularly serogroup B strains.

Multivalent immunogenic molecules comprise a carrier molecule containing at least one functional T-cell epitope and multiple different carbonhydrate fragments each linked to the carrier molecule and each containing at least one functional B-cell epitope. The carrier molecule inparts enhanced immunogenicity to the multiple carbohydrate fragments. The carbohydrate fragments may be capsular oligosaccharide fragments from Streptococcus pneumoniae which may be serotypes (1, 4, 5, 6B, 9V, 14, 18C, 19F or 23F), or Neisseria meningitidis, which may be serotype (A, B, C) W-135 or Y. Such oligosaccharide fragments may be sized from about 2 to about 5 kDa. Alternatively, the carbohydrate fragments may be fragments of carbohydrate-based tumor antigens, such as Globo H, Le<Y >or STn. The multivalent molecules may be produced by random conjugation or site-directed conjugation of the carbohydrate fragments to the carrier molecule. The multivalent molecules may be employed in vaccines or in the generation of antibodies for diagnostic applications.

NMB1870 is a protein in Neisseria meningitidis. Three families of NMB1870 are known. To increase the ability of a NMB1870 protein to elicit antibodies that are cross-reactive between the families, NMB1870 is engineered. Sequences can be substituted from one NMB1870 family into the corresponding position in another family. Proteins of NMB1870 sequences from different families can be joined to each other.

The present invention describes derivatized polysaccharide-protein conjugates, a composition comprising one or more of such derivatized polysaccharide-protein conjugates and methods of immunizing human patients with the same. The derivatized polysaccharide-protein conjugates are purified capsular polysaccharides from Neisseria meningitidis serogroups A, C, W-135, and Y, derivatized chemically activated and selectively attached to a carrier protein by means of a covalent chemical bond, forming polysaccharide-protein conjugates capable of eliciting long-lasting immunity to a variety of N. meningitidis strains.

The present invention is directed to novel Neisseria meningitidis lipo-oligosaccharide inner core molecules, conjugates thereof and immunogenic compositions thereof. In particular embodiments, the invention relates to multivalent immunogenic compositions comprising five distinct Neisseria meningitidis inner core lipo-oligosaccharide epitope groups, wherein the multivalent compositions induce cross-reactive immune responses against Neisseria meningitidis lipo-oligosaccharide immunotypes.

In one aspect, the invention relates to an isolated polypeptide comprising an amino acid sequence that is at least 95% identical to SEQ ID NO: 71. In another aspect, the invention relates to an immunogenic composition including an isolated non-lipidated, non-pyruvylated ORF2086 polypeptide from Neisseria meningitidis serogroup B, and at least one conjugated capsular saccharide from a meningococcal serogroup.

Provided herein are mutant strains of Neisseria meningitidis which produce Kdo-free lipid A as well as the Kdo-free lipid A molecules and immunogenic compositions containing such Kdo-free lipid A molecules from a Neisseria strain containing a genetically stable mutation which inactivates a gene selected from the group consisting of genes encoding arabinose-5-phosphate isomerase, CMP-Kdo synthetase and CMP-Kdo transferase. N. meningitidis NMB206 is a specifically exemplified strain which harbors a stable insertion mutation in the gene (ApsF) encoding A5P isomerase; strain NMB-249 is a specifically exemplified strain with a stable insertion mutation in the gene (kdtA) encoding CMP-Kdo synthetase, and strain NMB259 is specifically exemplified strain with a stable insertion mutation in the gene (kdsB) encoding CMP-Kdo transferase. Also provided by the present invention are methods for the production of Lipid A flee of 3-keto-3-deoxyoctanoic acid using these genetically stable N. meningitidis mutants. Also describes is pYT250, a plasmid functional in neisseriae and in enterics such as Escherichia coli.

Various improvements to vaccines that include a serogroup C meningococcal conjugate antigen, including: (a) co-administration with acellular B. pertussis antigen; (b) co-administration with an inactivated poliovirus antigen; (c) supply in a kit together with a separate pneumococcal conjugate component, which may be in a liquid form; and (d) use in combination with a pneumococcal conjugate antigen but without an aluminum phosphate adjuvant. A kit may have: (a) a first immunogenic component that comprises an aqueous formulation of a conjugated capsular saccharide from Streptococcus pneumoniae; (b) a second immunogenic component that comprises a conjugated capsular saccharide from Neisseria meningitidis serogroup C.

The present invention generally provides compositions comprising a polysaccharide derivative, and methods of their preparation and use for the prevention or treatment of diseases caused by Neisseria meningitidis bacteria, particularly group B (NmB) strains, and by E. coli K1. The invention provides a de-N-acetylated PS derivative in which one or more residues of the PS has been modified by de-N-acetylation. The invention also includes derivatives in which one or more of the N-acetyl groups of PS containing de-N-acetylated PS are replaced with other N-acyl groups, usually a lower acyl group of C2-C3. Further, the invention includes de-N-acetylated PS derivatives containing long chain hydrocarbons, as well as conjugates in which the de-N-acetylated PS derivative is linked to a carrier, e.g., a carrier protein.

In one aspect, the invention relates to an isolated polypeptide including the amino acid sequence of a carrier polypeptide and the amino acid sequence of an ORF2086 polypeptide. In another aspect, the invention relates to an immunogenic conjugate including ORF2086 polypeptide and a carrier polypeptide. The invention further includes immunogenic compositions and methods for inducing an immune response against Neisseria meningitidis in a mammal.