Three-Module Peptide Vehicles for Nucleic Acid Delivery
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Solution Overview
Problem
Existing nucleic acid delivery vehicles, such as lipid-based nanoparticles and polymer-based polyplexes, face challenges due to immunogenicity, cytotoxicity, and limited sequence variation, hindering their widespread application, while natural viruses are efficient but difficult to replicate effectively.
Innovation Solution
A peptide-based delivery vehicle comprising functional modules that can bind nucleic acids, self-assemble outside cells, disassemble inside cells, and protonate in endosomes, forming nano-sized assemblies for efficient intracellular delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a functional peptide is designed to deliver nucleic acids, then delivery efficiency is improved, but the peptide sequence becomes extremely complex and difficult to screen
Solution Approach 1:
The peptide is divided into three functional modules: a cationic module for nucleic acid binding, a self-assembly module for forming nano-assemblies, and a protonation module for endosomal escape. This segmentation allows each module to be independently designed and optimized, reducing the overall search space while maintaining delivery functionality.
Solution Approach 2:
The peptide design incorporates multiple functional capabilities within a single molecule: nucleic acid binding through cationic interactions, self-assembly into nano-structures, and endosomal escape through pH-dependent protonation. This multi-functionality reduces the need for separate components and simplifies the delivery system.
2Productivity
If existing delivery vehicles like lipid nanoparticles and polymer polyplexes are used, then nucleic acid delivery is achieved, but immunogenicity and cytotoxicity occur
Solution Approach 1:
The peptide-based delivery vehicle uses simple, biodegradable peptide components that can be rapidly synthesized and degraded by cellular proteases. This contrasts with persistent synthetic polymers and lipids that may accumulate and cause long-term toxicity. The peptide's temporary presence and subsequent degradation reduce immunogenicity and cytotoxicity.
Solution Approach 2:
The peptide's functional properties are dynamically adjusted in response to cellular conditions, particularly pH changes. The protonation module activates at endosomal pH to trigger release, while the self-assembly module responds to intracellular conditions. This dynamic parameter adjustment allows the peptide to function safely in multiple cellular environments without causing harm.
3Productivity
If natural viruses are used for nucleic acid delivery, then delivery efficiency is improved, but replication and manufacturing become difficult
Solution Approach 1:
The invention extracts and isolates the essential delivery functions from natural viruses (capsid assembly, nucleic acid binding, endosomal escape) and implements them through synthetic peptide modules. This removes the complex viral replication and manufacturing requirements while retaining the core delivery capabilities, enabling easier production through standard peptide synthesis methods.
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
The peptide-based vehicle enables safe and efficient delivery of nucleic acids into cells, overcoming limitations of existing technologies by providing a manageable peptide library for specific applications.
Implementation Method 1
the first functional module is able to bind to a nucleic acid
Implementation Method 2
the second functional module is able to self-assemble outside the cell and disassemble inside the cell
Implementation Method 3
the third functional module is able to be protonated in endosome
Data Source
AI summary
Provided is a peptide, wherein the peptide comprises a first functional module, a second functional module and a third functional module. Provided is a method of selecting a candidate peptide. Provided is a selecting method thereof. The peptide helps deliver nucleic acids efficiently.