Acid-Sensitive Alginoketal Particles for Solvent-Free Cation Delivery
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Solution Overview
Problem
Current methods for delivering cations like Cu (II) into cells are inefficient and require organic solvents, making them unsuitable for clinical translation, and there is a need for effective delivery vehicles to modulate cytosolic signaling pathways without disrupting mineral homeostasis.
Innovation Solution
Development of endosome-disrupting alginoketals that are crosslinked with acetal linkages and coupled with cations, allowing for the sustained release of cations into the cytosol, thereby modulating intracellular signaling pathways.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cations are delivered using conventional methods, then cation delivery to cells is achieved, but organic solvents are required making the formulation unsuitable for clinical translation
Solution Approach 1:
The patent uses endosome-disrupting peptides as intermediary carriers that facilitate cation delivery into cells without requiring organic solvents. The peptides act as mediators between the cations and the cell membrane, enabling solvent-free delivery while maintaining clinical suitability.
Solution Approach 2:
The invention changes the delivery mechanism from solvent-based to peptide-mediated endosomal disruption. By altering the delivery parameter from chemical solvent to biological peptide carrier, the formulation becomes suitable for clinical translation while effectively delivering cations to cells.
2Adaptability or versatility
If cation levels are increased in cells, then cytosolic signaling pathways are modulated, but mineral homeostasis is disrupted
Solution Approach 1:
The endosome-disrupting peptides enable localized delivery of cations specifically to the cytosol, creating a local concentration gradient that modulates signaling pathways without globally disrupting mineral homeostasis. The delivery is spatially targeted rather than systemic.
Solution Approach 2:
The invention applies partial action by delivering cations to only the specific cellular compartment (cytosol) where signaling pathways are located, rather than affecting the entire cell or organism. This localized partial delivery achieves signaling modulation while preserving overall mineral homeostasis.
3Reliability
If endosome disrupting peptides are used, then cation delivery to cytosol is achieved, but peptide stability and design complexity increase
Solution Approach 1:
The endosome-disrupting peptides are designed as segmented structures with distinct functional domains: an N-terminal cell-penetrating segment, a central endosome-disrupting segment with specific amino acid sequences, and a C-terminal cation-binding segment. This segmentation allows each domain to be optimized independently while maintaining overall functionality.
Solution Approach 2:
The peptides function as composite materials combining multiple functional motifs within a single polypeptide chain. The composite structure integrates cell penetration capability, endosomal membrane disruption capability, and cation chelation capability, achieving multiple functions simultaneously while managing design complexity through modular architecture.
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
Alginoketal particles effectively deliver cations like Cu (II) to cancer cells, inducing cell death by accumulating hydrogen peroxide while sparing non-cancerous cells, providing a targeted and solvent-free delivery method.
Implementation Method 1
stapled acid-sensitive endosome disrupting alginates
Data Source
AI summary
An agent comprising:an algin crosslinked with acetal linkages; andat least one cation coupled to the crosslinked algin.