Non-Peptidic Cell-Penetrating Motifs for Mitochondrial Cargo Delivery
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Solution Overview
Problem
Existing therapeutic agents face challenges in penetrating the mitochondrial membrane due to their lack of membrane-permeability, particularly peptides and nucleic acids, complicating the treatment of mitochondrial diseases.
Innovation Solution
Development of non-peptidic cell-penetrating motifs (CPMs) with specific structures, such as Formula I and Formula II, which include multivalent moieties and guanidine or guanidinium groups, allowing for the delivery of cargo, including therapeutic agents, directly to mitochondria.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If therapeutic agents (peptides and nucleic acids) are used to treat mitochondrial diseases, then therapeutic efficacy is improved, but membrane permeability deteriorates (they cannot penetrate mitochondrial membranes)
Solution Approach 1:
The patent uses cell-penetrating motifs (CPMs) as intermediary molecules that facilitate the transport of therapeutic agents across mitochondrial membranes. The CPMs contain guanidine or guanidinium groups that interact with the mitochondrial membrane to enable passage, while the therapeutic cargo remains separate but is delivered to the target destination through this mediating mechanism.
Solution Approach 2:
The invention creates composite structures combining cell-penetrating motifs with therapeutic cargo molecules. The CPMs act as delivery vehicles that composite with the therapeutic agents, forming a unified system that possesses both the membrane-penetrating capability of the CPM and the therapeutic function of the cargo, thereby resolving the permeability- efficacy contradiction.
2Object-affected harmful factors
If compounds are designed to penetrate mitochondrial membranes, then membrane permeability is improved, but delivery specificity to mitochondria may deteriorate
Solution Approach 1:
The cell-penetrating motifs are designed with specific local chemical properties (guanidine/guanidinium groups at particular positions) that confer mitochondrial targeting capability. This localized functional design ensures that the compound interacts specifically with mitochondrial membranes rather than other cellular membranes, maintaining delivery specificity while achieving permeability.
Solution Approach 2:
The invention optimizes specific parameters of the CPM structure, such as the number and positioning of guanidine groups, the length and composition of linkers, and the hydrophobicity of aromatic residues. By carefully adjusting these parameters, the compounds achieve optimal balance between membrane penetration efficiency and mitochondrial targeting specificity, preventing off-target effects.
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 CPMs effectively penetrate mitochondrial membranes, enabling targeted delivery of therapeutic agents, as demonstrated by co-localization studies and functional assays, thereby addressing the challenge of mitochondrial drug delivery.
Implementation Method 1
a drug molecule must traverse the plasma as well as the two mitochondrial membranes before reaching the mitochondrial matrix
Implementation Method 2
each R1 is independently a moiety comprising a hydrophobic residue
Data Source
AI summary
Disclosed are compounds that can penetrate the mitochondrial membrane and that are able to deliver cargo (e.g., therapeutic agents) specifically to the mitochondria.