Abstract:
A purified IceA protein of Helicobacter pylori is provided. The protein is expressed as either an IceA 1 or an IceA 2 variant. A purified polypeptide fragment of the IceA protein is also provided. An antigenic fragment of IceA is provided. An isolated nucleic acid that encodes an IceA protein of H. pylori is provided. A nucleic acid that encodes an IceA 1 variant and a nucleic acid that encodes an IceA 2 variant is also provided. Fragments of the IceA gene are provided. A method of detecting the presence of an antibody against H. pylori in a sample is provided. The method comprises the following steps: a) contacting the sample with a purified IceA protein of H. pylori or a H. pylori-specific fragment thereof; and b) detecting the binding of the antibody in the sample to the protein or fragment, the detection of biding indicating the presence in the sample of antibodies against H. pylori. A method of detecting the presence of an antibody against an ulcerative Helicobacter pylori strain in a sample is also provided.
Abstract:
Inclusions such as encysted parasites (21) and spoilage in food products such as fish fillets (1) are detected by immersing the food products in a bath of an electrolyte (5), such as a saline solution, having substantially the same electrical conductivity as the uncontaminated food product. An electrical current (I) passed through the electrolyte (5) also passes through the food product (1). Perturbations in the resulting magnetic field produced by the discontinuities in conductivity at the boundaries of the inclusions or of the spoiled article which have substantially different conductivities from that of the electrolyte and unspoiled food products, provide an indication of the presence of the contamination. Perturbations in the magnetic field at the edges of the container (43) are cancelled by directing the current (I) in a first direction and back over the container (43) in the opposite direction through a cancelling conductor (25).
Abstract:
The invention provides a method of inducing a mucosal immune response in a subject, comprising administering to the mucosa of the subject an amount of antigen-encoding DNA effective to induce a mucosal immune response complexed to a transfection-facilitating lipospermine or a lipospermidine. In the method of inducing a mucosal immune response, the antigen-encoding DNA can encode an antigen that is expressed on the surface of infected cells during the course of infection. DNA encoding the envelope glycoproteins of viral pathogens is used in the present method. Lipospermines and lipospermidines are bifunctional molecules consisting of one or more hydrophobic chains covalently linked to a cationic grouping in which there is coordination of three or more amide hydrogens with a phosphate oxygen of the DNA chain forming an ionic charge complex. One preferred example of a lipospermine is DOGS (droctadecylamidoglycylspermine). The invention also provides a composition, comprising an amount of DNA encoding an envelope antigen or envelope-associated antigen of a pathogen complexed to a lipospermine. More specifically, the invention provides a composition, comprising an amount of DNA encoding an envelope antigen of HIV complexed to a lipospermine.
Abstract:
This invention is a system and implant designed for use in short segment anterior fusion of patient's spine after the removal of a diseased or injured anterior vertebral body. The system includes the placement of the cylinder (20) of the implant in an intra-osseous location for added safety, and for the placement of the cylinder (20) of the implant in the middle column area of the adjacent healthy vertebral bodies for increased biomechanical strength. The system further includes transverse fixation of the cylinder of the implant, thus adding medial-lateral and rotational support to the system. Finally, the system utilizes the concept of modularity, wherein intraoperative exchangeable parts are available to better fit the patient.
Abstract:
The invention relates to methods of crystallizing a peptide or polypeptide comprising linking a peptide or polypeptide to a terminus of a crystallizable carrier protein to form a chimeric protein and crystallizing the chimeric protein. The invention also includes methods for determining the three-dimensional structure of a peptide or polypeptide, the crystallized chimeric proteins themselves, and methods for designing a peptide or polypeptide for screening for improved binding to a molecule by using the three dimensional structural information.
Abstract:
The present invention relates to the delivery of biologically active molecules, such as peptides, nucleic acids and therapeutic agents, into the interior of cells by administering to the cells a complex comprising the molecule linked to an importation competent signal peptide. Such delivery can be utilized for purposes such as peptide therapy, gene transfer, and antisense therapy.
Abstract:
A crash impact attenuator (10) including one or more cylinders (12), each bolted or otherwise connected to the adjacent cylinder (12) and such cylinders (12) being connected to the platform (14) of a service vehicle (16) or to an abutment adjacent a highway wherein the cylinders (12) are constructed from a high molecular weight/high density polyethylene material (18).
Abstract:
This invention relates to a method to determine the metastatic potential of tumor cells. In particular, this invention relates to the detection of the expression of metalloproteinase pump protein. The expression of this protein can be determined by molecular diagnostic means such as a Northern Blot analysis or polymerase chain reaction amplification. Additionally, immunological methods can be employed to detect metalloproteinase pump protein.
Abstract:
A method is disclosed for inducing thromboxane suppression in a mammalian subject by percutaneously administering a pharmaceutical composition containing aspirin. Articles useful for practicing the therapeutic methods of the invention are also disclosed.
Abstract:
Flaws in an electrically conductive sample object (1) are detected by cancelling the magnetic field generated by a detection current passed through the sample object by passing the current back through an unflawed field cancelling object (39) placed next to the sample object, and measuring the uncancelled field produced by any flaw, preferably with a superconducting quantum interference device (SQUID) magnetometer (101). Elongated objects such as tubes (85) and rods (93) are fed through a sleeve (87, 95) which forms the field cancelling object, with the current applied to the elongated member and passed to the field cancelling sleeve through sliding contacts (89, 96).