Multivalent Antibody Modular Linker Design for Epitope Targeting
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Solution Overview
Problem
Current multivalent antibody technologies face challenges in efficiently producing high-quality antibodies with three or more binding domains, as existing formats are time-consuming, costly, and prone to stability and immunogenicity issues, with limitations in targeting a variety of antigens due to restrictive linkers and forced light chain pairing.
Innovation Solution
A modular format for multivalent antibodies using a base antibody portion with additional binding domains connected via linkers, employing a common variable region and hinge sequences to ensure stability and flexibility, allowing for simultaneous binding to multiple epitopes without extensive engineering, and utilizing transgenic animals to generate diverse cognate chains.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If existing multivalent antibody formats are used, then antibody binding capability is achieved, but production time and cost increase significantly
Solution Approach 1:
The antibody is divided into modular binding domains (Fab arms) that can be independently designed and assembled. Each Fab arm contains a variable region for antigen binding and a constant region for structural stability, allowing parallel development and rapid assembly into multivalent configurations
Solution Approach 2:
The invention creates a universal platform where the same base antibody structure can be configured with different numbers and types of binding domains (bispecific, trispecific, tetraspecific) by simply changing the linker regions, eliminating the need to redesign the entire antibody for each application
2Reliability
If traditional multivalent antibody formats are used, then binding domains are created, but stability and immunogenicity issues arise
Solution Approach 1:
The linker regions are specifically engineered with distinct properties for each binding domain configuration. The linker sequences are optimized to provide the right balance of flexibility and stability for each specific antibody format, reducing unwanted immunogenic responses while maintaining structural integrity
Solution Approach 2:
The invention systematically varies parameters such as linker length, composition, and configuration to optimize the balance between stability and immunogenicity. By adjusting these parameters across different binding domain arrangements, the antibody maintains high stability while minimizing immunogenic responses
3Adaptability or versatility
If restrictive linkers are used in multivalent antibodies, then binding domains are connected, but targeting capability is limited
Solution Approach 1:
The linker regions are designed with dynamic properties that allow them to adapt to different spatial arrangements of binding domains. The linkers can flex and rotate to accommodate various antigen configurations, enabling the antibody to target multiple antigens with different orientations and distances
Solution Approach 2:
Each linker region is locally optimized for its specific position and function within the multivalent antibody structure. Different linkers with tailored sequences and properties are used in different locations to provide the optimal balance of flexibility, stability, and targeting capability for each specific binding domain arrangement
4Adaptability or versatility
If forced light chain pairing is used, then antibody structure is simplified, but diversity in cognate chain generation is reduced
Solution Approach 1:
The antibody chains are segmented into independent variable regions that can be generated and paired in multiple combinations. This segmentation allows for the creation of diverse cognate chain pairs without forcing a single pairing configuration, enabling exploration of multiple antigen specificities
Solution Approach 2:
The invention employs partial pairing strategies where not all chains are forced into a single configuration. By allowing partial freedom in chain pairing, the system generates a broader diversity of functional antibody configurations while maintaining manageable manufacturing complexity through standardized modular components
Data Source
AI summary
The invention relates to a multivalent antibody which comprises: a base antibody portion which comprises two binding domains; and at least one additional binding domain, wherein the base antibody portion is connected by a linker to the at least one additional binding domain, wherein each binding domain of the base antibody portion and each of the at least one additional binding domains all have a common variable region, and wherein the linker comprises a hinge sequence or a sequence derived from a hinge sequence. The invention also relates to a multivalent antibody which comprises: a base antibody portion which comprises two binding domains; and at least one additional binding domain, wherein at least one additional binding domain comprises a CH1 region and is connected to the base antibody portion by said linker, linking a variable region of the base antibody portion and the CH1 region, and wherein the multivalent antibody binds to at least three different epitopes.