Biologically active proteins having increased In Vivo and/or In Vitro stability

a technology of biological active proteins and stability, which is applied in the direction of peptide/protein ingredients, depsipeptides, dna preparations, etc., can solve the problems of reduced or no therapeutic activity, significant product loss, and difficult manufacturing and characterization of mixtures

Inactive Publication Date: 2010-07-29
AMUNIX OPERATING INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The conjugation step can result in the formation of product mixtures that need to be separated leading to significant product loss.
Such mixtures are difficult to manufacture and characterize and they contain isomers with reduced or no therapeutic activity.
All these methods have significant limitations.
The selective PEGylation of the N-terminus requires careful process control and side reactions are difficult to eliminate.
The introduction of cysteines for PEGylation can interfere with protein production and / or purification.
A further limitation of PEGylation is that PEG is typically manufactured as a mixture of polymers with similar but not uniform length.
The same limitations are inherent in many other chemical polymers.
It has also been demonstrated that oligomeric sequences that are based on such pathogen-derived repetitive sequences can be fused to other proteins resulting in increased serum halflife.
However, these pathogen-derived oligomers have a number of deficiencies.
However, no attempts have been reported to remove T cell epitopes from the sequences contributing to the formation of immune reactions.
Furthermore, the pathogen-derived sequences have not been optimized for pharmacological applications which require sequences with good solubility and a very low affinity for other target proteins.

Method used

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  • Biologically active proteins having increased In Vivo and/or In Vitro stability
  • Biologically active proteins having increased In Vivo and/or In Vitro stability
  • Biologically active proteins having increased In Vivo and/or In Vitro stability

Examples

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examples

Example

Design of a Glycine-Serine Oligomer Based on Human Sequences

[0264]The human genome data base was searched for sequences that are rich in glycine. Three sequences were identified as suitable donor sequences as shown in Table X.

TABLE XDonor sequences for GRS design A.AminoAccessionSequencesacidProteinNP_009060GGGSGGGSGSGGGG486-499zinc finger proteinQ9Y2X9GSGSGGGGSGG19-31zinc finger proteinCAG38801SGGGGSGGGSGSG 7-19MAP2K4

[0265]Based on the sequences in Table X we designed a glycine rich sequence that contains multiple repeats of the peptide A with sequence GGGSGSGGGGS. Peptide A can be oligomerized to form structures with the formula (GGGSGSGGGGS)n where n is between 2 and 40. FIG. 5 shows that all possible 9mer subsequences in oligomers of peptide A are contained in at least one of the proteins listed in table 3. Thus oligomers of peptide A do not contain human T cell epitopes. Inspection of FIG. 5 reveals that GRS based on oligomers of peptide A can begin and end at any of the...

example

Serum Binding Activity of MURPs

[0344]One can coat MURPs of interest into microtiter plates and control proteins in other wells of the plate. Subsequently, one can add serum samples of interest to the wells for 1 hour. Subsequently, the wells can be washed with a plate washer. Bound serum proteins can be detected by adding antibodies against serum proteins that have been conjugated with enzymes like horse radish peroxidase or alkaline phosphatase for detection. Another way to detec serum binding to MURPs to add the MURP of interest to serum for about 1 hour to allow binding. Subsequently, one can immunoprecipitate the MURP using an antibody against an epitope in the MURP sequence. The precipitated samples can be analyzed by PAGE and optionally by Western to detect any proteins that co-precipitated with the MURP. One can identify the serum proteins that show co-precipitation by mass spectrometry.

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Abstract

The present invention provides unstructured recombinant polymers (URPs) and proteins containing one or more of the URPs. The present invention also provides microproteins, toxins and other related proteinaceous entities, as well as genetic packages displaying these entities. The present invention also provides recombinant polypeptides including vectors encoding the subject proteinaceous entities, as well as host cells comprising the vectors. The subject compositions have a variety of utilities including a range of pharmaceutical applications.

Description

CROSS-REFERENCE[0001]This application claims the benefit of U.S. Provisional Application No. 60 / 743,410 filed Mar. 6, 2006, which application is incorporated herein by reference. This application is a continuation-in-part application of Ser. Nos. 11 / 528,927 and 11 / 528,950, filed on Sep. 27, 2006, which in turn claim priority to provisional applications Ser. Nos. 60 / 721,270, 60 / 721,188, filed on Sep. 27, 2005 and 60 / 743,622 filed on Mar. 21, 2006, all of which are herein incorporated by reference in their entirety.BACKGROUND OF THE INVENTION[0002]It has been well documented that properties of proteins, in particular plasma clearance and immunogenicity, can be improved by attaching hydrophilic polymers to these proteins (Kochendoerfer, G. (2003) Expert Opin Biol Ther, 3: 1253-61), (Greenwald, R. B., et al. (2003) Adv Drug Deliv Rev, 55: 217-50), (Harris, J. M., et al. (2003) Nat Rev Drug Discov, 2: 214-21). Examples of polymer-modified proteins that have been approved by the FDA for t...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): A61K38/20C07K14/00A61K38/16C07K16/00A61K39/395C07K14/52C07K14/475C07H21/04A61P37/00A61P35/00A61P3/10A61P9/10A61P13/12A61P7/02A61P29/00A61K38/21C12N9/00C12N15/63C12N5/10C12P21/02
CPCC07K7/06C07K7/08C07K14/001C07K14/415C12N15/1044C07K2319/35C07K14/47C07K14/53C07K14/56C07K14/61G01N33/6845A61K38/00A61P13/12A61P29/00A61P31/00A61P35/00A61P37/00A61P37/06A61P5/00A61P7/02A61P7/06A61P9/00A61P9/10A61P3/10C07K14/535C07K2319/31
Inventor SCHELLENBERGER, VOLKERSTEMMER, WILLEM P.WANG, CHIA-WEISCHOLLE, MICHAEL D.POPKOV, MIKHAILGORDON, NATHANIEL C.CRAMERI, ANDREAS
Owner AMUNIX OPERATING INC
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