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Small compounds that correct protein misfolding and uses thereof

A protein and compound technology, applied in the field of synthesis, can solve problems such as damage to proteins

Inactive Publication Date: 2009-12-09
UNIV OF FLORIDA RES FOUNDATION INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The native conformation of a polypeptide is encoded in its primary amino acid sequence, and even a single mutation in an amino acid sequence can impair the protein's ability to assume its proper conformation

Method used

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  • Small compounds that correct protein misfolding and uses thereof
  • Small compounds that correct protein misfolding and uses thereof
  • Small compounds that correct protein misfolding and uses thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0134] Example 1: Analysis of protein folding using cell lines expressing P23H opsin

[0135] P23H mutant and wild-type opsins were expressed in tetracycline-induced stable HEK293 cell lines in the presence of 11-cis-retinal and various inhibitors, respectively. At 48 hours, the aforementioned folded protein was purified by immunoaffinity and quantified by UV-visible spectroscopic analysis. The total amount of opsin was analyzed at 280nm. The amount of rhodopsin in a biochemically functional conformation was analyzed at 500 nm. Immunofluorescence microscopy was also used to determine the cellular location of the protein.

Embodiment 2

[0136] Example 2: Inhibition of the proteasome improves reversion to correctly folded P23H

[0137] MG132, a reversible proteasome inhibitor, was added to the culture medium of the HEK293 cell line described in Example 1 at the time of induction. Such as Figure 1A As shown, proteasome inhibition resulted in more than 200-250% recovery of rhodopsin. In contrast, the yield of wild rhodopsin was only increased by 35-40% ( Figure 1B ).

Embodiment 3

[0138] Example 3: Inhibition of autophagy improves reversion to correctly folded P23H

[0139] By adding 3-methyladenine to the medium during induction, the autophagy of HEK293 cells in Example 1 was inhibited. This resulted in a 350-400% increase in P23H rhodopsin recovery compared to only 50-60% recovery of wild-type rhodopsin ( Figure 2A and 2B ).

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Abstract

The invention features compositions and methods comprising at least one compound selected from a proteasomal inhibitor, an autophagy inhibitor, a lysosomal inhibitor, an inhibitor of protein transport from the ER to the Golgi, an Hsp90 chaperone inhibitor, a heat shock response activator, a glycosidase inhibitor or histone deacetylase inhibitor that are useful for treating or preventing a protein conformation disease in a subject by correcting misfolded proteins in vivo. The compositions and methods can further comprise an 11-cis-retinal or 9-cis-retinal compound. Examples of protein conformation disorders and / or diseases may include retinitis pigmentosa, age-related macular degeneration, glaucoma, corneal dystrophies, retinoschises, Stargardt's disease, autosomal dominant druzen, Best's macular dystrophy, al -antitrypsin deficiency, cystic fibrosis, Huntington's disease, Parkinson's disease, Alzheimer's disease, nephrogenic diabetes insipidus, cancer and / or Jacob-Creutzfeld disease.

Description

[0001] Cross-Referenced Related Applications [0002] This application claims priority from US Provisional Application No. 60 / 703,068, filed July 27, 2005, the contents of which are incorporated herein by reference. [0003] Statement of Rights to Inventions Made by Federally Sponsored Research Institutes [0004] This work was supported by a grant from the National Eye Institute, grant number EY016070-01. The government may have certain rights in the invention. Background technique [0005] Proteins must fold into the correct three-dimensional conformation to achieve their biological function. The native conformation of a polypeptide is encoded in its primary amino acid sequence, and even a single mutation in an amino acid sequence can impair the protein's ability to assume its proper conformation. When proteins fail to fold properly, their biological and clinical roles are compromised. Aggregation and misfolding of proteins are the main causes of many human diseases, suc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61P27/06A61P25/02A61P27/02A61K33/02A61K31/395A61K31/445A61P11/00A61P13/02A61P25/16A61P25/28A61P35/00C12N5/07C12N5/071
CPCA61K33/02A61K31/223A61K31/16A61K31/11A61K31/047A61K31/19A61K31/4015A61K31/395A61K31/473A61K31/52A61K31/365A61K45/06A61P11/00A61P13/02A61P25/02A61P25/16A61P25/28A61P27/02A61P27/06A61P35/00A61P43/00A61P9/10A61K2300/00A61K31/21A61K31/225A61K38/04
Inventor S·考沙尔S·M·努尔韦兹
Owner UNIV OF FLORIDA RES FOUNDATION INC
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