Method for producing proteins suitable for treating lysosomal storage disorders
First Claim
1. A method of treating a subject suffering from a lysosomal storage disorder other than Fabry Disease caused by a deficiency of a specific protein comprising:
- (a) producing said protein in an insect cell culture such that said protein will be selectively imported into macrophages when administered to said subject, and(b) administering a therapeutically effective amount of said protein to said subject.
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Abstract
The present invention is based on the discovery that proteins produced in insect cell cultures are glycosylated in a unique manner that causes them to be selectively imported by cells that express mannose receptors on their membranes, particularly macrophages. Proteins that are selectively imported into cells containing mannose receptors are provided, as well as pharmaceutical compositions containing such proteins and methods for producing such proteins. Application of the present invention to produce proteins useful for treating lysosomal storage disorders is also disclosed. Engineering of cells to express mannose receptors so that they will selectively import proteins produced in insect cells is also taught, as well as a protein targeting system using such cells and proteins. Finally, an improved elution buffer for the purification of proteins produced in insect cells from a Concanavalin A column is provided.
9 Citations
7 Claims
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1. A method of treating a subject suffering from a lysosomal storage disorder other than Fabry Disease caused by a deficiency of a specific protein comprising:
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(a) producing said protein in an insect cell culture such that said protein will be selectively imported into macrophages when administered to said subject, and (b) administering a therapeutically effective amount of said protein to said subject. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification