Abstract:
This invention relates to a purified Helicobacter pylori vacuolating toxin and methods to use this toxin to produce protective antibodies against H. pylori infection. Antiserum to this antigen can be used to detect the toxin. Methods to detect anti-toxin antibodies determine the susceptibility of a patient to develop peptic ulcer disease, gastric carcinoma, or other clinical consequences of H. pylori infection.
Abstract:
A vector and methods of inhibiting replication of an RNA virus which replicates in the cytoplasm of a cell in a subject, comprising administering to the cell of the subject a composition comprising a vector comprising a promoter functionally linked to a nucleic acid comprising a viral gene, wherein the nucleic acid is in antisense orientation relative to the promoter and wherein the cell is capable of promoting expression from the promoter, thereby transcribing the nucleic acid and inhibiting replication of the RNA virus in the subject. In particular, provided are vectors and methods for treating a respiratory syncytial virus infection.
Abstract:
Genetic analysis of familial breast and ovarian cancer indicates that BRCA1 is a tumor suppressor gene. The BRCA1 gene encodes a 190 kDa protein with sequence homology and biochemical analogy to the granin family of proteins. Granins are secreted from endocrine cells via the regulated secretory pathway and are proteolytically cleaved to yield biologically active peptides. BRCA1 protein localises to secretory vesicles, and was demonstrated to be secreted. Gene transfer of BRCA1 inhibits growth and tumorigenesis of breast and ovarian cancer cells, but not colon or lung cancer cells or fibroplasts, suggesting that BRCA1 encodes a tissue-specific growth inhibitor. Thus, BRCA1 is a secreted growth inhibitor and functions by a mechanism not previously described for tumor suppressor genes. The BRCA2 breast and ovarian cancer gene encodes a protein that also includes a granin region, indicating that the BRCA2 protein is also a secreted tumor suppressor. Therapeutic methods using the BRCA1 and BRCA proteins and genes are also described. A method of screening for the receptors of the BRCA1 protein and BRCA2 proteins is also described.
Abstract:
A solid state chemical sensing device (10) is described in which a chemically sensitive electrode (30), an intrinsic (undoped) diamond layer (25), and a doped diamond layer (20) are deposited on a conductive or insulating substrate (15). At least one of the chemically sensitive electrode (30) or doped diamond layer (20) must make ohmic contact to the intrinsic diamond layer (25). The device (10) forms a sensing structure in which conduction of current through the device (10) in the presence of a target chemical is dominated by space charged limited current, thereby providing enhanced sensitivity and selectivity.
Abstract:
A method is disclosed of reducing viral replication of a virus of the Paramyxoviridae family in a host, comprising administering to the host an antigen of the virus in combination whith an effective adjuvant amount of interleukin-12 (IL-12). Human viruses of the Paramyxoviridae family include paramyxoviruses (e.g., parainfluenza virus 1, parainfluenza virus 2, parainfluenza virus 3 and parainfluenza virus 4), morbilliviruses (e.g., measles virus) and pneumoviruses (e.g., respiratory syncytial virus); other non-human viruses of the Paramyxoviridae family include canine distemper virus, bovine respiratory syncytial virus, Newcastle disease virus and rhinderpest virus. A composition is also disclosed comprising a mixture of an antigen of a virus of the Paramyxoviridae family and an effective adjuvant amount of interleukin-12 (IL-12).
Abstract:
The invention provides an isolated nucleic acid encoding the rat P450 2C11 arachidonic acid epoxygenase, or a human homologue thereof, having a mutation associated with salt induced hypertension. Also provided is an isolated cell line expressing the epoxygenase encoded by the emutated nucleic acid, and a non-human transgenic animal having a germ line insertion of the mutated nucleic acid. Also provided is a method of screening a compound for efficacy in treating salt induced hypertension comprising administering the compound to such a non-human transgenic animal, and detecting an improvement in the animal's hypertension. The invention also provides a method of screening a human subject for a genetic predisposition to salt induced hypertension comprising detecting a mutation in a human homologue of a rat P450 2C11 arachidonic acid epoxygenase gene which affects normal epoxygenase activity. Also provided is a method of treating salt induced hypertension in a human subject associated with a genetic mutation in a human homologue of the rat P450 2C11 arachidonic acid epoxygenase gene, comprising administering to the subject a functional metabolite, or analogue thereof, produced by the human homologue of the rat P450 2C11 arachidonic acid epoxygenase. Also provided is an isolated mutated rat P450 2C11 arachidonic acid epoxygenase, or a human homologue thereof, having a mutation associated with salt induced hypertension.
Abstract:
The present invention provides a method of detecting and diagnosing pre-invasive breast cancer by identifying differentially expressed genes in early, pre-invasive breast cancer tissue. Differentially expressed genes can be used as genetic markers to indicate the presence of pre-invasive cancerous tissues. Microscopically directed tissue sampling techniques combined with differential display or differential screening of cDNA libraries are used to determine differential expression of genes in the early stages of breast cancer. Differential expression of genes in pre-invasive breast cancer tissue is confirmed by RT-PCR, nuclease protection assays and in-situ hybridization of ductal carcinoma in situ tissue RNA and control tissue RNA. The present invention also provides a method of screening for compounds that induce expression of the BRCA1 gene, whose product negatively regulates cell growth in both normal and malignant mammary epithlial cells. The present invention also relates to gene therapy method using this gene.
Abstract:
A novel prostaglandin receptor has been identified and DNA encoding the receptor has been isolated, purified, sequenced and expressed in host cells. This DNA encoding the novel prostaglandin receptor and host cells expressing the receptor are used to identify modulators of the prostaglandin receptor.
Abstract:
The invention provides purified antibodies specifically reactive with an 8-(cycloalkyl or aromatic) substituted-1,3-dipropylxanthine such as 1,3-dipropyl-8-cyclohexylxanthine and 1,3-dipropyl-8-cyclopentylxanthine. Also provided is a method of conjugating an immunogenic water soluble protein to an 8-(cycloalkyl or aromatic) substituted-1,3-dipropylxanthine, comprising combining: (a) an aqueous solution comprising a conjugate-forming amount of an immunogenic water-soluble protein dissolved therein; and (b) an organic solution comprising a non-reactive, water-miscible organic solvent and a conjugate-forming amount of an 8-(cycloalkyl or aromatic) substituted-1,3-dipropylxanthine dissolved therein, wherein the ratio of the amount of aqueous solution to the amount of organic solution does not precipitate either the water soluble protein or the 8-(cycloalkyl or aromatic) substituted-1,3-dipropylxanthine, to form a protein 8-(cycloalkyl or aromatic) substituted-1,3-dipropylxanthine conjugate. In addition, the invention provides a method of detecting an 8-(cycloalkyl or aromatic) substituted-1,3-dipropylxanthine in a sample comprising contacting the antibodies of claim 1 with the 8-(cycloalkyl or aromatic) substituted-1,3-dipropylxanthine and detecting the presence of binding between the antibody and the 8-(cycloalkyl or aromatic) substituted-1,3-dipropylxanthine.
Abstract:
The surface of internal structure of diamagnetic and paramagnetic materials is imaged by measuring, preferably with a superconducting quantum interference device (SQUID) magnetometer (7), perturbations to an applied magnetic field resulting from variations in magnetic susceptibility at an array of locations across the object (3). The array of perturbation measurements is processed to generate a map of local susceptibilities. For implementation of susceptibility tomography, multiple arrays of perturbation signals for a plurality of relative orientations between the object, the field, and the measurement locations are processed to generate values for local susceptibility at selected sites within the object, such as along a selected sectional plane.