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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Heterologous immunoprecipitates also have potential for therapeutic use.

Potential therapeutic usefulness of administered enzymes is limited by toxicity and allergenicity. To overcome these problems we are using scurvy to test various enzyme modifications that may be suitable for therapy. L-Gulonolactone oxidase, which catalyzes the final step in ascorbic acid biosynthesis, is immunoprecipitated with specific antisera from rabbits and then cross-linked with glutaraldehyde. The modified enzyme retains activity sufficient to elicit ascorbic acid synthesis in scorbutic guinea pigs. Intraperitoneal injection of this altered enzyme to animals supplemented with L-gulonolactone increases plasma concentrations of the vitamin. Importantly, multiple doses of the complex are tolerated. Therefore, it is possible to prolong survival time of animals fed an ascorbic acid-deficient diet by this enzyme replacement therapy. This procedure can also be applied to other enzymes that have potential therapeutic use. Serum cholinesterase and asparaginase both retain activity after this modification and are tolerated in single or in weekly repeated injections. Following three or four weekly injections, an anaphylactic reaction to serum but not to enzyme can be elicited if they are injected intravascularly. We conclude that the stability of the immobilized foreign enzyme is a critical factor in lessening the toxicity to multiple injections of these foreign proteins.[1]


  1. Heterologous immunoprecipitates also have potential for therapeutic use. Hadley, K.B., Lindemann, D.A., Sato, P.H. Biotechnol. Appl. Biochem. (1987) [Pubmed]
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