Dual Variable Domain Immunoglobulin Multispecific Binding
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Solution Overview
Problem
Current methods for producing bispecific antibodies face challenges such as molecular heterogeneity, reduced production yields, and increased immunogenicity due to the need for sophisticated purification processes and mutational modifications, which affect their stability and efficacy.
Innovation Solution
The development of Dual Variable Domain (DVD) binding proteins, which comprise specific polypeptide chains with variable domains and linkers, allowing for high-affinity binding to two or more antigens, and can be engineered to have improved stability and reduced immunogenicity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If cell fusion or chemical conjugation methods are used to produce bispecific antibodies, then multispecific binding capability is achieved, but molecular heterogeneity increases and production yield decreases
Solution Approach 1:
The antibody is divided into separate domain units (variable domains and constant domains) that can be independently expressed and then assembled. The DVD-Ig format uses separate heavy and light chains with specific domain arrangements, allowing controlled pairing through genetic design rather than random fusion, thus achieving bispecificity while maintaining molecular homogeneity.
Solution Approach 2:
The patent introduces engineered constant domains and linkers as intermediaries that mediate the assembly of variable domains into functional bispecific antibodies. These intermediary elements provide controlled interaction interfaces that ensure correct pairing of heavy and light chains, preventing mispairing while maintaining the desired multispecific binding capability.
2Manufacturing precision
If sophisticated purification procedures are applied to remove mis-paired by-products, then molecular homogeneity is improved, but production complexity and cost increase
Solution Approach 1:
The patent implements preliminary action by designing the antibody structure with engineered constant domains and linkers that prevent mispairing during expression and assembly. This structural design ensures that only correctly paired bispecific antibodies are produced, eliminating the need for complex purification steps to remove mis-paired by-products.
3Stability of the object's composition
If mutational modifications are introduced to improve antibody stability, then stability is enhanced, but immunogenicity increases
Solution Approach 1:
The patent applies parameter changes by systematically modifying constant domain sequences and linker characteristics to optimize the balance between stability and immunogenicity. Specific amino acid substitutions and domain engineering approaches are used to enhance structural stability while maintaining compatibility with human immune systems through controlled parameter optimization.
Data Source
AI summary
The present invention relates to engineered multivalent and multispecific binding proteins, methods of making, and specifically to their uses in the prevention, diagnosis, and/or treatment of disease.