Cyclic Peptide-Antibody Conjugates for Stable Intracellular Targeting
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Solution Overview
Problem
There is a need for cyclized peptides that can perform various therapeutic and diagnostic functions with high selectivity and binding affinity, while also resisting degradation by proteases and facilitating intracellular targeting.
Innovation Solution
Synthetic cyclic peptides operably linked to antibodies or fragments thereof, comprising an amino acid sequence of X-Cys-Y-Cys-Z, where X, Y, and Z are variable lengths, forming a disulfide bridge to enhance binding and stability, and can be used in conjunction with imaging agents for targeted delivery and diagnosis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If cyclic peptides are used to improve binding affinity and selectivity, then the binding performance is improved, but the structural complexity increases
Solution Approach 1:
The peptide is divided into distinct functional segments: the cyclic peptide core providing binding affinity, and separate antibody fragments (scFv) providing targeting specificity. This segmentation allows each component to be optimized independently while achieving high overall binding performance.
Solution Approach 2:
The invention creates a composite molecule combining cyclic peptide chemistry with antibody fragment biology. The cyclic peptide provides structural constraints and binding affinity, while the scFv provides immunological targeting, creating a hybrid system with enhanced overall performance.
2Reliability
If cyclic peptides are used to resist protease degradation, then serum stability is improved, but the manufacturing complexity increases
Solution Approach 1:
The cyclic peptide structure is pre-formed during synthesis to inherently resist protease degradation before administration. The cyclization is established during manufacturing, providing long-term serum stability without requiring additional protective measures during circulation.
Solution Approach 2:
The cyclic peptide acts as an intermediary element that bridges the cyclic peptide core and the antibody fragment. It provides both structural stability and functional connectivity, facilitating the combination of two complex molecules while maintaining manufacturing feasibility.
3Ease of operation
If cyclic peptides are used to facilitate intracellular targeting, then the delivery capability is improved, but the device complexity increases
Solution Approach 1:
The system is segmented into a cyclic peptide delivery component and an antibody fragment targeting component. The cyclic peptide facilitates intracellular delivery through its structural properties, while the scFv provides specific targeting, allowing each function to be optimized separately.
Solution Approach 2:
The cyclic peptide structure serves multiple functions simultaneously: it provides binding affinity, resists protease degradation, facilitates intracellular targeting, and acts as a linker between molecular components. This multi-functionality reduces the need for separate specialized elements.
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 cyclic peptides improve the binding of antibodies to antigens, enhance serum stability, and enable intracellular targeting, facilitating therapeutic intervention and diagnostic imaging with high specificity and efficiency.
Implementation Method 1
at least two Cys form a disulfide bridge
Data Source
AI summary
The present disclosure relates to methods and compositions regarding cyclic peptides for use with antibodies or fragments thereof.