Abstract: Methods for preparing highly purified AAV vector formulations are provided. The highly pure AAV formulations described herein are superior for clinical use.

Abstract: In accordance with the present invention, a method for increasing the yield of rLV vector particles comprising a trans gene encoding a therapeutic protein or fragment thereof is disclosed. In one approach, cells are transfected with plasmids encoding the necessary components for rLV production using a calcium chloride transfection mix at pH 7.1 wherein the calcium chloride and plasmids form a complex which is added to the cells at a constant speed. The cells are then incubated for a suitable time period wherein virus particle media is collected at least twice during the incubation period and stored in a cold storage unit, thereby reducing virus inactivation.

Abstract: In accordance with the invention, provided herein are methods for purifying recombinant adeno-associated (rAAV) vector particles.

Abstract: The present invention provides methods of generating a recombinant AAV vector with reduced immunogenicity, comprising: providing eukaryotic cells with a nucleic acid comprising a sequence of interest that is flanked by AAV inverted terminal repeats, wherein the nucleic acid comprises CpG dinucleotide sites, wherein at least a portion of the CpG dinucleotide sites are methylated, wherein the eukaryotic cell expresses one or more other components necessary to achieve recombinant AAV biosynthesis, whereby the recombinant AAV vector is generated by the eukaryotic cell, wherein the generated recombinant AAV vector comprises nucleic acid wherein at least a portion of the CpG dinucleotide sites are methylated.

Abstract: Methods for separating AAV empty capsids from mixtures of AAV vector particles and AAV empty capsids are described. The methods use column chromatography techniques and provide for commercially viable levels of recombinant AAV virions.

Abstract: Methods for separating AAV empty capsids from mixtures of AAV vector particles and AAV empty capsids are described. The methods use column chromatography techniques and provide for commercially viable levels of recombinant AAV virions.

Abstract: Methods for preparing highly purified rLV vector formulations at the scale needed to meet anticipated demand for human gene therapy are provided.

Abstract: Methods for preparing highly purified AAV vector formulations are provided. The highly pure AAV formulations described herein are superior for clinical use.

Abstract: The present invention provides humanized viral vectors and methods of use thereof for delivery of transgenes or therapeutic nucleic acids to human subjects. Humanized viral vectors are modified from known viral vectors such as those based on AAV by coating their surface with a human protein such as human serum albumin and optionally a lipid coating or formulation, so that the foreign or non-human nature of the vector is masked. The coating is performed in a manner that reduces or prevents binding of antibodies to the vector surface, thereby reducing or preventing antibody-mediated clearance of vector, but still allowing the vector to transduce target cells and achieve therapeutic gene transfer. Such humanized vectors therefore evade pre-existing immune surveillance, reduce immune responses, and achieve therapeutic gene transfer in the presence of pre-existing antibodies to the viral vector.

Abstract: In accordance with the invention, provided herein are methods for purifying recombinant adeno-associated (rAAV) vector particles.

Abstract: Provided are compositions and methods of transducing/transfecting cells with a molecule, such as a nucleic acid (e.g., plasmid), at high efficiency. High efficiency transduced/transfected cells can, when transduced with a nucleic acid that encodes a protein or comprises a sequence that is transcribed into a transcript of interest, produce high amounts of protein and/or transcript. High efficiency transduced/transfected cells can, when transduced with plasmids comprising (i) nucleic acids encoding AAV packaging proteins and/or nucleic acids encoding helper proteins; and (ii) a transgene that encodes a protein or is transcribed into a transcript of interest; produce high amounts of recombinant rAAV vector.

Abstract: Provided are methods of treating a subject in need of treatment for a disease caused by a loss of function or activity of a protein. Also provided are methods of treating a subject in need of treatment for a disease caused by a gain of function, activity or expression, of a protein.

Abstract: Methods for separating AAV empty capsids from mixtures of AAV vector particles and AAV empty capsids are described. The methods use column chromatography techniques and provide for commercially viable levels of recombinant AAV virions.

Abstract: Methods for measuring REP-1 and REP-2 activity are provided. In certain embodiments, a method includes: (a) contacting cells that do not express endogenous functional REP-1 or REP-2 protein with an adeno-associated viral (AAV) vector comprising a CHM gene encoding a REP-1 protein or CHM like gene encoding a REP-2 protein under conditions allowing cell transduction; (b) incubating transduced cells under conditions allowing expression of the encoded REP-1 or REP-2 protein; (c) lysing the transduced cells to produce an extract comprising the encoded REP-1 or REP-2 protein and Rab small GTPase (Rabs); (d) incubating said extract with a Rab substrate for a period of time and under conditions allowing prenylation of the Rab thereby forming prenylated Rab; and (e) detecting and/or quantifying the prenylated Rab, wherein the amount of prenylated Rab reflects REP-1 or REP-2 activity thereby measuring REP-1 or REP-2 activity.

Abstract: Methods for preparing highly purified AAV vector formulations are provided. The highly pure AAV formulations described herein are superior for clinical use.

Abstract: Methods and compositions for transfecting cells with plasmids are disclosed. In certain embodiments, methods and compositions are disclosed in which transfection efficiency is significantly increased by contacting the cells being transduced with polyethyleneimine (PEI) that is free of nucleic acid during the transfection process. Therapeutically useful adeno-associated viral vectors generated according to the disclosed methods and compositions are also disclosed.

Abstract: Provided are methods for producing recombinant adeno-associated virus (rAAV) vector particles at high recovery or high titer. Also provided are methods that concentrate rAAV vectors to a high concentration, for example, up to 5E+13 (5×1013) vector genomes per milliliter (Vg/ml) with little if any rAAV aggregates.

Abstract: This application relates to the fields of gene therapy and molecular biology. In accordance with the present invention, an adeno-associated virus (AAV) vector comprising an altered capsid protein is provided. More specifically, this invention provides adeno-associated viral vectors comprising protein capsid variants which accelerate vector breakdown and clearance, thereby reducing undesirable immune responses.

Abstract: Methods for preparing highly purified AAV vector formulations are provided. The highly pure AAV formulations described herein are superior for clinical use.

Abstract: In accordance with the present invention, a method for increasing the yield of rLV vector particles comprising a trans gene encoding a therapeutic protein or fragment thereof is disclosed. In one approach, cells are transfected with plasmids encoding the necessary components for rLV production using a calcium chloride transfection mix at pH 7.1 wherein the calcium chloride and plasmids form a complex which is added to the cells at a constant speed. The cells are then incubated for a suitable time period wherein virus particle media is collected at least twice during the incubation period and stored in a cold storage unit, thereby reducing virus inactivation.