Abstract: Methods and kits for predicting infusion reaction risk and antibody-mediated loss of response during intravenous PEGylated uricase therapy in gout patients is provided. Routine SUA monitoring can be used to identify patients receiving PEGylated uricase who may no longer benefit from treatment and who are at greater risk for infusion reactions.

Abstract: Genetically modified proteins with uricolytic activity are described. Proteins comprising truncated urate oxidases and methods for producing them, including PEGylated proteins comprising truncated urate oxidase are described.

Abstract: Genetically modified proteins with uricolytic activity are described. Proteins comprising truncated urate oxidases and methods for producing them, including PEGylated proteins comprising truncated urate oxidase are described.

Abstract: Methods and kits for predicting infusion reaction risk and antibody-mediated loss of response during intravenous PEGylated uricase therapy in gout patients is provided. Routine SUA monitoring can be used to identify patients receiving PEGylated uricase who may no longer benefit from treatment and who are at greater risk for infusion reactions.

Abstract: A naturally occurring or recombinant protein, especially a mutein of porcine urate oxidase (uricase), that is essentially free of large aggregates can be rendered substantially non-immunogenic by conjugation with a sufficiently small number of strands of polymer such that the bioactivity of the protein is essentially retained in the conjugate. Such conjugates are unusually well suited for treatment of chronic conditions because they are less likely to induce the formation of antibodies and/or accelerated clearance than are similar conjugates prepared from protein preparations containing traces of large aggregates.

Abstract: Genetically modified proteins with uricolytic activity are described. Proteins comprising truncated urate oxidases and methods for producing them, including PEGylated proteins comprising truncated urate oxidase are described.

Abstract: Genetically modified proteins with uricolytic activity are described. Proteins comprising truncated urate oxidases and methods for producing them, including PEGylated proteins comprising truncated urate oxidase are described.

Abstract: A naturally occurring or recombinant urate oxidase (uricase) covalently coupled to poly(ethylene glycol) or poly(ethylene oxide) (both referred to as PEG), wherein an average of 2 to 10 strands of PEG are conjugated to each uricase subunit and the PEG has an average molecular weight between about 5 kDa and 100 kDa. The resulting PEG-uricase conjugates are substantially non-immunogenic and retain at least 75% of the uricolytic activity of the unmodified enzyme.

Abstract: Genetically modified proteins with uricolytic activity are described. Proteins comprising truncated urate oxidases and methods for producing them, including PEGylated proteins comprising truncated urate oxidase are described.

Abstract: Genetically modified proteins with uricolytic activity are described. Proteins comprising truncated urate oxidases and methods for producing them, including PEGylated proteins comprising truncated urate oxidase are described.

Abstract: The subject invention provides a method for purifying a target protein from a mixture comprising the target protein and contaminating protein, comprising the steps of exposing the mixture to an effective amount of a cationic surfactant such that the contaminating protein is preferentially precipitated and recovering the target protein. Proteins purified according to the method of the invention are also provided.