Plant Membrane-Bound Polypeptide Antigenicity via Selective Lipid Extraction
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Solution Overview
Problem
Membrane-bound proteins are challenging to express effectively in transgenic systems due to difficulties in proper processing and folding, which hinders their recognition as antigens and induction of protective immune responses, especially when used as vaccines.
Innovation Solution
The process involves reducing the fat content of plant material expressing membrane-bound polypeptides to increase the exposure of antigenic sites and retaining phospholipids, either by supercritical fluid extraction or other methods that leave more phospholipids associated with the polypeptide, enhancing antigenicity and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If membrane-bound proteins are expressed in transgenic plants, then vaccine production capability is improved, but proper processing and folding difficulties reduce antigen recognition
Solution Approach 1:
The patent changes the chemical composition parameters of the plant material by selectively removing neutral lipids while preserving phospholipids. This parameter change alters the physical environment surrounding the membrane-bound antigen, enabling proper protein folding and processing without compromising vaccine production capability
Solution Approach 2:
The patent extracts and removes specific components (neutral lipids) from the plant material containing membrane-bound antigens. This extraction process eliminates interfering substances that prevent proper protein folding, while retaining the essential phospholipid components needed for antigen stability and immunogenicity
2Manufacturing precision
If fat content is reduced in plant material, then antigenic site exposure is improved, but phospholipid retention must be maintained for stability
Solution Approach 1:
The patent applies local quality differentiation by selectively removing neutral lipids from specific regions of the plant material while preserving phospholipids in other regions. This creates zones with different lipid compositions: areas with reduced fat content for improved antigenic site exposure, and areas with retained phospholipids for protein stability
Solution Approach 2:
The patent precisely controls the lipid composition parameters by adjusting the selectivity of the removal process. The process parameters are tuned to achieve partial fat reduction (improving antigenic exposure) while maintaining phospholipid content (preserving protein stability), creating an optimized intermediate state
3Reliability
If extraction methods are used to reduce fat content, then antigenicity is increased, but phospholipid loss may occur reducing stability
Solution Approach 1:
The patent introduces a selective intermediary process that differentiates between neutral lipids and phospholipids during extraction. This intermediary mechanism allows the removal of neutral lipids (enhancing antigenicity) while protecting phospholipids from loss (maintaining stability), resolving the trade-off between these two competing requirements
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach increases the antigenic response and protective immunity in animals by improving the recognition of membrane-bound polypeptides as antigens, leading to enhanced immune responses and stability of the proteins.
Implementation Method 1
retaining phospholipids, either by supercritical fluid extraction or other methods that leave more phospholipids associated with the polypeptide
Data Source
AI summary
Increased antigenicity of a membrane-bound polypeptide produced from a plant is provided in a process in which extraction of the polypeptide or other compounds from the plant is such that phospholipids are associated with the polypeptide. Reducing fat by supercritical fluid extraction increases antigenicity of such plant-produced membrane-bound polypeptides. Methods and means of producing such membrane-bound polypeptides are provided. Methods to produce a protective response in animals are provided by administering to the animal the membrane-bound polypeptide. Binding of antibody specific to the membrane-bound polypeptide is increased. The process provides for increased preferred formation of the membrane-bound polypeptide. Stability of the membrane-bound polypeptide is increased when the plant material is defatted.