Abstract: A potent short hairpin RNA (shRNA734) directed to human Hypoxanthine Guanine Phosphoribosyltransferase (HPRT) improves the rate of gene-modified stem cell engraftment by a conditioning and in vivo selection strategy to confer resistance to a clinically available guanine analog antimetabolite, 6TG, for efficient positive selection of gene-modified stem cells. Uses for polynucleotides comprising the shRNA734 include methods for knocking down HPRT in a cell, for conferring resistance to a guanine analog antimetabolite in a cell, for producing selectable genetically modified cells, for selecting cells genetically modified with a gene of interest from a plurality of cells, for removing cells genetically modified with a gene of interest from a plurality of cells, and for treating a subject infected with HIV.

Abstract: Provided are compositions and methods for treating, ameliorating and preventing various infections, disorders and conditions in mammals, including genetically-predisposed and chronic disorders, where a microbial or bacterial flora is at least one causative or symptom-producing factor, where exemplary compositions are products of manufacture, a food, a drink, a nutraceutical, a dietary supplement, a formulation, a pharmaceutical or a pharmaceutical preparation comprising at least one or several of a plurality of isolated, or substantially purified bacteriophages or prophages, or bacteriophage subunits, a milk, a milk product, milk lipid, milk fat globule (MFG) macromolecule, a milk mucin, a milk glycolipid, a milk free glycan, a milk mucin-like glycoprotein, a milk protein, a milk sugar or lactose, a milk fat or butterfat, a milk vitamin.