67 results about "Bacterial Adhesins" patented technology

The inventive subject matter relates to the methods for the induction of immunity and prevention of diarrhea resulting from Escherichia coli. The inventive subject matter also relates to the use Escherichia coli adhesins as immunogens and to the construction of conformationally stability and protease resistant Escherichia coli adhesin constructs useful for inducing immunity to Escherichia coli pathogenic bacteria. The methods provide for the induction of B-cell mediated immunity and for the induction of antibody capable of inhibiting the adherence and colonization of Escherichia coli including enterotoxigenic Escherichia coli, to human cells.

The invention provides a nucleic acid encoding the 37-kDa protein from Streptococcus pneumoniae. Also provided are isolated nucleic acids comprising a unique fragment of at least 10 nucleotides of the 37-kDa protein. The invention also provides purified polypeptides encoded by the nucleic acid encoding the 37-kDa protein from and the nucleic acids comprising a unique fragment of at least 10 nucleotides of the 37-kDa protein. Also provided are antibodies which selectively binds the polypeptides encoded by the nucleic acid encoding the 37-kDa protein and the nucleic acids comprising a unique fragment of at least 10 nucleotides of the 37-kDa protein. Also provided are vaccines comprising immunogenic polypeptides encoded by the nucleic acid encoding the 37-kDa protein and the nucleic acids comprising a unique fragment of at least 10 nucleotides of the 37-kDa protein. Further provided is a method of detecting the presence of Streptococcus pneumoniae in a sample comprising the steps of contacting a sample suspected of containing Streptococcus pneumoniae with nucleic acid primers capable of hybridizing to a nucleic acid comprising a portion of the nucleic acid encoding the 37-kDa protein, amplifying the nucleic acid and detecting the presence of an amplification product, the presence of the amplification product indicating the presence of Streptococcus pneumoniae in the sample. Further provided are methods of detecting the presence of Streptococcus pneumoniae in a sample using antibodies or antigens, methods of preventing and treating Streptococcus pneumoniae infection in a subject.

PCT No. PCT/AU92/00141 Sec. 371 Date Nov. 30, 1992 Sec. 102(e) Date Nov. 30, 1992 PCT Filed Apr. 2, 1992 PCT Pub. No. WO92/17167 PCT Pub. Date Oct. 15, 1992There are disclosed complexes and compositions for oral delivery of a substance or substances to the circulation or lymphatic drainage system of a host. The complexes of the invention comprise a microparticle coupled to at least one carrier, the carrier being capable of enabling the complex to be transported to the circulation or lymphatic drainage system via the mucosal epithelium of the host, and the microparticle entrapping or encapsulating, or being capable of entrapping or encapsulating, the substance(s). Examples of suitable carriers are mucosal binding proteins, bacterial adhesins, viral adhesins, toxin binding subunits, lectins, Vitamin B12 and analogues or derivatives of Vitamin B12 possessing binding activity to Castle's intrinsic factor.

An L-amino acid producing bacterium of the Enterobacteriaceae family is described, wherein the bacterium has been modified so as to not produce type I fimbrial adhesin protein is cultured in a medium to produce and excrete said L-amino acid in the medium, and collecting said L-amino acid from the medium.

The invention provides BASB232 polypeptides and polynucleotides encoding BASB232 polypeptides and methods for producing such polypeptides by recombinant techniques. Also provided are diagnostic, prophylactic and therapeutic uses. The invention further provides immunogenic compositions comprising a plurality of antigens selected from at least two different categories of antigen, having different functions within Bordetella. Examples of such categories of antigen are autotransporter proteins, iron acquisition proteins, lipoproteins, adhesins and toxins/invasins.

A method for treating or preventing infections from yeast of the Candida species is provided wherein an immunoglobulin composition containing high titers of antibodies to staphylococcal adhesins ClfA and SdrG is administered in an amount effective to inhibit the growth and progression of Candidial infections. The compositions and methods of the present invention are advantageous in that they can be used to treat both staphylococcal and Candidial infections at the same time, and they are particularly effective in treating or preventing late-onset sepsis in neonates.

A high molecular weight polysaccharide intracellular adhesin (SAE) antigen having the general structure of poly-1,6,β-2-amidoglucopyranoside, which is variable substituted with N-acetyl and O-succinyl substituents is described. Also, a method is given for isolating this antigen from Staphylococcus aureus. The SAE can be used in a vaccine, either alone, conjugated to an immunogenic protein, and/or with an immunogenic adjuvant.

A computational method for identifying adhesin and adhesin-like proteins, said method comprising steps of computing the sequence-based attributes of a neural network software wherein the attributes are (i) amino acid frequencies, (ii) multiplet frequency, (iii) dipeptide frequencies, (iv) charge composition, and (v) hydrophobic composition, training the artificial neural Network (ANN) for each of the computed five attributes, and identifying the adhesin and adhesin-like proteins having probability of being an adhesin (Pad) as >= 0.51; a computer system for performing the method; and genes and proteins encoding adhesin and adhesin-like proteins.

Methods and compositions for treating biofilms and diseases associated with amyloidosis such as Alzheimer's, Parkinson's and Huntington's disease, and Type 2 diabetes, by destroying amyloid fibrils in a two-step treatment are disclosed. The first step consists of binding to the amyloid fibril an intercalating molecule with a negatively charged group such as Congo red. The second step consists of adding metal ions, such as silver, gold(I), copper(I), palladium or lead ions or metal colloids of silver or gold, which destabilize the amyloid-dye complex. This process results in a disintegration of the fibril into peptide monomers and small aggregates of monomers.

The inventive subject matter relates to an immunogenic composition composed of a chimeric molecule including a conformationally stable adhesin from Escherichia coli fused to a bacterial toxin A subunit, such as cholera toxin A subunit or heat-labile Escherichia coli toxin A subunit. The invention also relates to the adhesin-toxin chimera noncovalently associated with a toxin B subunit of the same or different species as the A subunit. The invention also relates to a method of utilizing an adhesin/toxin fusion composition to elicit an immune response.

This invention relates to the PrtR-PrtK cell surface protein of Porphyromonas gingivalis and in particular a multimeric cell association protein complex comprising the PrtR and PrtK proteins. Accordingly the invention provides a substantially purified antigenic complex for use in raising an antibody response directed against Porphyromonas gingivalis. The complex comprises at least one multimeric protein complex of arginine-specific and lysine-specific thiol endopeptidases each containing at least one adhesin domain, the complex having a molecular weight of greater than about 200 kDa. The invention also relates to pharmaceutical compositions and associated agents based on said complex for the detection, prevention and treatment of Periodontal disease associated with P. gingivalis.

The present application relates to immunogenic compositions comprising a mixture of Bordetella (e.g., B. pertussis) antigens and an oil in water nanoemulsion. In particular, the invention provides immunogenic compositions comprising nanoemulsion and a combination of Bordetella (e.g., B. pertussis) antigens that have different functions, for example, combinations including B. pertussis adherence factors (adhesins), B. pertussis toxins or B. pertussis virulence factors. Vaccines, methods of treatment, uses of and processes to make a pertussis or whooping cough vaccine are also described. Compositions and methods of the present invention find use in, among other things, clinical (e.g. therapeutic and preventative medicine (e.g., vaccination)) and research applications.

The present invention relates to a multivalent Pneumococcal conjugate vaccine (PCV) composition comprising: 1) at least 12 capsular polysaccharides selected from serotypes 1, 3, 4, 5, 6B, 7F, 9N, 9V, 15B, 14, 18C, 19A, 19F, 22F, 23F and 33F of S. pneumoniae activated with CDAP and conjugated to carrier protein selected from CRM₁₉₇, pneumococcal surface protein A (PspA), pneumococcal adhesin protein (PsaA) or combination thereof and 2) a pharmaceutically acceptable carrier, wherein the composition does not contain capsular polysaccharide from serotype 6A.

This invention discloses the construction of a fused poloric spirillum adhesion gene engineered bacterial vaccine characterizing that the adhesion HpaA is used to construct an adjuvant fused engineered vaccine of poloric spirillum adhesion and colibacillus heat-labile enterotoxin B sub unit or cholear toxin B sub unit intramolecular to get large quantity of necessary vaccine proteins by high density fermentation, occlusion body extraction, renaturation and purification to be proprared to peroral, injection and spray agents.

A multi-valent immunogenic composition confers protection on an immunized host against infection caused by both Haemophilus influenzae and Moraxella catarrhalis. Such composition comprises at least four antigens comprising at least one antigen from Haemophilus influenzae, and at least one antigen from Moraxella catarrhalis. Three of the antigens are adhesins. High molecular weight (HMW) proteins and Haemophilus influenzae adhesin (Hia) proteins of non-typeable Haemophilus and a 200 kDa outer membrane protein of Moraxella catarrhalis comprise the adhesin components while the other antigen is a non-proteolytic analog of Hin47 protein. Each component does not impair the immunogenicity of the others. The multi-valent immunogenic composition may be combined with DTP component vaccines, which may also include non-virulent poliovirus and PRP-T, to provide a component vaccine without impairment of the immunogenic properties of the other antigens.

The invention relates to a carrier capable of showing and expressing helicobacter pylori protein on the surface of lactococcus lactis, and a construction method and application of the carrier. The construction method of the carrier comprises the following steps of: amplifying helicobacter pylori adhesin A (hpaA) gene by taking helicobacter pylori genomic deoxyribose nucleic acid (DNA) as a template by a polymerase chain reaction (PCR) method; performing enzyme digestion on the obtained hpaA gene and an expression carrier pNZ8110-lysM and connecting, wherein a connection product is used for transforming escherichia coli; screening and identifying positive transformation bacteria, and extracting recombinant plasmid pNZ8110-hpaA-lysM from the positive transformation bacteria; transferring the recombinant plasmid into a lactococcus lactis NZ3900 strain by an electroporation method, and screening and identifying to obtain a recombinant strain L.1actis NZ3900/pNZ8110-hpaA-lysM; and culturing the recombinant strain, and introducing the expression of the hpaA gene by using an inductive agent Nisin. Western blots analysis shows that the protein of the cell wall of the recombinant strain contains the expressed HpaA protein which has immunocompetence. The expression carrier and the recombinant strain containing the carrier can be applied to preparation of helicobacter pylori resistance vaccine and a diagnostic reagent or food processing.

The invention discloses a construction method and application of a faeG expressing gene engineering probiotic. The method comprises the following steps of: according to the gene sequence and the expression vector plasmid characteristic of a disclosed F4 escherichia coli pilus adhesin faeG, designing a primer which contains a specific endonuclease site; performing polymerase chain reaction (PCR) amplification by taking deoxyribonucleic acid (DNA) of an enterotoxigenic escherichia coli plasmid as a template to obtain a faeG gene-containing segment, linking the segment with an expression vector plasmid pNZ8148 to obtain a recombinant plasmid pNZ8148-faeG, transferring the recombinant plasmid into lactobacillus or a galactococcus cell by using an electrotransformation method to obtain gene engineering probiotic which expresses enterotoxigenic escherichia coli pilus adhesin faeG, expressing under the induction of nisin and analyzing and proving a target gene by SDS-PAGE and Western blot so as to express correctly. A recombinant strain can be used for preventing colibacillus diarrhea of suckling pigs and weanling pigs.

A method and kit for detecting Trichomonas vaginalis infection in a human subject are disclosed. In the method, a body-fluid sample such as a vaginal swab sample or urine is obtained from the subject and contacted with an antibody specific against a Trichomonas adhesin peptide, forming an antibody-adhesin peptide complex if the subject is infected with Trichomonas. The presence or absence of the complex establishes, with a reliability of at least 80%, in the case of a vaginal swab sample, and with a reliability of at least 40% in the case of a urine sample, the presence or absence, respectively, of Trichomonas infection in the subject. A preferred test kit employs a dry-strip, sandwich assay, format.

The invention discloses an acellular pertussis combined vaccine and a preparation method thereof and belongs to the technical field of production and preparation of vaccines. The acellular pertussis combined vaccine is prepared from the following raw material components: 5-40Mu g of pertussis toxin, 5-40Mu g of filamentous hemagglutinin, 2-10Mu g of pertussis adhesin, 10-25lf of diphtheria toxoid, 4-10lf of tetanus toxoid, 1.0-2.0mg/ml of aluminium hydroxide and 7.5-9.5g/L of sodium chloride. The preparation method of the acellular pertussis combined vaccine comprises the following steps: preparing monovalent vaccine original fluids, mixing and diluting. The acellular pertussis combined vaccine is clear and definite in ingredients, quality control can be easily realized, the side effect is small, and the safety is high; and the preparation method of the acellular pertussis combined vaccine is simple to operate, convenient in preparation and low in cost, so that the acellular pertussis combined vaccine is applicable to industrial mass production.