Abstract:
The invention provides methods for activating transgene expression by administering histone deacetylase inhibitors, methods for identifying compounds that activate transgene expression, and cells that can be used in these screening methods.
Abstract:
The present invention provides a method to achieve radioisotopic localization at tumor sites, i.e., a method of enhancing radiolabeled ligand localization to a tumor in an individual in need of such treatment, comprising the steps of: transducing said tumor with a gene encoding a membrane expressed protein unique to said tumor; and administering to said individual a radiolabeled ligand which specifically binds to said protein. The use of gene therapy technology to induce expression of high affinity membrane molecules/receptors can enhance the specificity of radioisotope localization while the use of radioactive isotopes with the ability to deliver radiation damage across several cell diameters will compensate for less than perfect transduction efficiency.
Abstract:
The fiber protein of adenovirus has been genetically altered via attachment at the carboxyl end of a peptide linker, preferably up to 26 amino acids in length which forms a random coil, which can be used to attach a non-adenovirus ligand altering the binding specificity of the fiber protein. Examples of ligands include peptides which are selectively bound by a targeted cell so that the modified fiber protein is internalized by receptor-mediated endocytosis, and peptides which can act as an universal coupling agent, for example, biotin or streptavidin. The linker is designed to not interfere with normal trimerization of fiber protein, to avoid steric hindrance of binding of the fiber protein to a targeted cell, and to serve as a site to introduce new peptide sequence. The modified fiber protein is prepared by genetic engineering of the nucleotide sequence encoding the fiber protein, through the addtion of new sequence at the carboxyl tail-encoding region which encodes the linker and the ligand. The N-terminus of the fiber protein is not altered in the preferred embodiment, although in some embodiments it may be desirable to inhibit uptake by the nucleus of the fiber protein, by deletion of nuclear targeting signals. The modified fiber protein can be utilized as part of a recombinant adenovirus for use in gene therapy.
Abstract:
Novel compounds are provided that are effective to inhibit the activity of DHUDase or UrdPase. Such compounds have general formula (I) or (II), where X is S or Se; Y is I, F, Cl, Br, methoxy, benzyl, selenenylphenyl, or thiophenyl, and R1 is an acyclo tail having general formula (III), where R2 is H, CH2OH or CH2NH2; R3 is OH, NH2, or OCOCH2CH2CO2H; and R4 is O, S, or CH2. The compounds can be used in pharmaceutical compositions, along with various chemotherapeutic agents to increase the efficacy of the treatment. These compounds can also be used in methods of treating patients by coadministering or sequentially administering the enzyme inhibiting compounds with a chemotherapeutic agent effective to treat cancers, or viral, fungal, bacterial, or parasitic infections. The compounds have further utility in enhancing imaging. Further, they can be administered alone to prevent and/or treat disorders of pyrimidine catabolism and other physiological disorders.
Abstract:
A DNA construct for use in treating a human carcinoma is disclosed. The construct includes a cancer-therapeutic gene under the control of a promoter and a group of enhancer sequences which are conserved in 5' flanking regions of the human epithelial cell secretory leukoprotease inhibitor gene and the human epithelial cell cytokeratin gene 8. Also disclosed is a method employing the construct to selectively kill carcinoma cells which are characterized by expression of epithelial cell secretory leukoprotease inhibitor protein in a transformed state, and a method for confirming effective gene delivery to and transcriptional activity in target epithelial cells.
Abstract:
Disclosed are crystals of complement factor D and a method of making them involving diffusing water from an aqueous solution of complement factor D and PEG maintained at a pH of 5.2-7.0.
Abstract:
The invention provides a method of diagnosing interstitial cystitis comprising the steps of: obtaining primary cultures of urothelial cells from bladder biopsies; selecting urothelial cells of basal type and producing secondary cultures; measuring percentage of single cells and percentage of large colonies in the secondary cultures; determining proliferative ability by measuring percentage of large colonies incorporating bromodeoxyuridine in 1, 2, 3, 4, 5, 6 or more than 6 cells/colony; determining differentiation ability by observing percentages of cells exhibiting different specific characteristics; measuring the percentage of apoptotic cells; measuring the percentage of large colonies that contain 1, 2, 3, 4, 5, 6 or more than 6 apoptotic cells; and comparing the percentage of the colonies to baseline values of the same parameters determined in similarly cultured urothelial cells not suspected of having interstitial cystitis. The figure shows the distribution of colonies of varying size in cultures of bladder epithelial cells from interstitial cystitis patients (IC) and control subjects (control).
Abstract:
The present invention makes available diagnostic assays and reagents for facilitating accurate diagnosis and subsequent monitoring of Alzheimer's disease and its progression, as well as determination of stroke occurrence in a patient. As described herein, the percentage T-lymphocytes of a unique T-lymphocyte phenotype (IgM+ T cells) is statistically correlated with Alzheimer's disease as well as the recent occurrence of a stroke.
Abstract:
Methods and compositions for killing replicating or non-replicating, targeted mammalian cells and bystander cells, comprising: (a) transfecting or transducing mammalian cells with a nucleic acid encoding a purine analog nucleoside cleavage enzyme, or providing the targeted cells directly with the enzyme; and (b) contacting the targeted cells with a purine analog nucleoside substrate for the enzyme to produce a toxic purine base analog thereby killing the targeted cells and bystander cells. In the present method of killing cells, the enzyme can be an E. coli purine analog nucleoside phosphorylase.
Abstract:
A method for the treatment of a host, and in particular, a human, infected with HBV is provided that includes administering an HBV-treatment amount of a nucleoside of formula (I), (II) or (III), wherein R is hydrogen, fluoro, bromo, chloro, iodo, methyl or ethyl; and R is OH, Cl, NH2, or H; or a pharmaceutically acceptable salt of the compound, optionally in a pharmaceutically acceptable carrier or diluent.