CendR Peptide Motifs for Selective Cell Internalization
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Solution Overview
Problem
Current cell-penetrating peptides lack selectivity and efficiency in targeting specific cell types and tissues, leading to non-specific internalization and poor tissue penetration, particularly in tumor environments with normalized vasculature.
Innovation Solution
Development of CendR elements and conjugates that utilize a C-terminal arginine or lysine motif for selective internalization and tissue penetration, activated by proteolytic cleavage, allowing for targeted delivery of therapeutic and diagnostic cargo compositions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional cell-penetrating peptides are used for delivery, then internalization into cells is achieved, but selectivity for specific cell types and tissues is lost
Solution Approach 1:
The delivery system is divided into two functional segments: a cell-penetrating peptide component responsible for internalization and a selectivity component (such as a ligand or targeting sequence) responsible for specific cell type recognition. This segmentation allows each component to perform its specialized function independently, resolving the contradiction between achieving reliable internalization and maintaining cell type selectivity.
Solution Approach 2:
The invention creates composite delivery vehicles that combine cell-penetrating peptides with other functional moieties such as ligands, antibodies, or targeting sequences. This composite structure integrates the internalization capability of the peptide with the selectivity of the attached component, enabling both reliable cell entry and specific targeting of desired cell types simultaneously.
2Reliability
If conventional cell-penetrating peptides are used, then delivery into cells is achieved, but tissue penetration capability is insufficient
Solution Approach 1:
The invention merges the cell-penetrating function with tissue penetration capability by combining cell-penetrating peptides with sequences or structures known to facilitate tissue traversal. This merging creates a unified delivery vehicle that can navigate through tissue barriers and subsequently enter target cells, overcoming the limitation of shallow tissue penetration while maintaining reliable cell delivery.
3Productivity
If non-selective peptides are used for delivery, then broad cell uptake is achieved, but targeting efficacy is reduced
Solution Approach 1:
The delivery system is designed with local quality differentiation: the cell-penetrating peptide portion maintains its non-selective, high-capacity uptake properties for efficient delivery, while a separately attached selectivity component provides localized targeting accuracy. This local quality assignment allows the system to achieve both high overall delivery capacity and precise targeting of specific cell populations without compromising either function.
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
Enables specific and efficient internalization and tissue penetration of cargo compositions, enhancing targeting efficacy and overcoming the limitations of non-selective delivery in existing technologies.
Implementation Method 1
activated by proteolytic cleavage
Data Source
AI summary
Disclosed are compositions and methods useful for targeting and internalizing molecules into cells of interest and for penetration by molecules of tissues of interest. The compositions and methods are based on peptide sequences that are selectively internalized by a cell, penetrate tissue, or both. The disclosed internalization and tissue penetration is useful for delivering therapeutic and detectable agents to cells and tissues of interest.