Integrated Antibody Evolution and Expression in Mammalian Hosts
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Solution Overview
Problem
Current methods lack an integrated system for the generation, evolution, and production of antibodies and proteins in mammalian cells, making it difficult to optimize and express these molecules efficiently for therapeutic applications.
Innovation Solution
The Comprehensive Integrated Antibody Optimization (CIAO) method allows for the simultaneous evolution and expression of therapeutic proteins, including antibodies, in a single eukaryotic host system, utilizing techniques like comprehensive positional evolution and cell surface display to optimize properties such as expression and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate systems are used for antibody evolution and mammalian expression, then each system can be optimized independently, but the integration of evolution and production in a single system is impossible
Solution Approach 1:
The patent merges the antibody evolution system and mammalian expression system into a single integrated platform. The mammalian host cell simultaneously performs antibody library generation, evolution through selection processes, and high-level protein production, eliminating the need for separate bacterial/phage display and mammalian expression systems.
Solution Approach 2:
The mammalian host cell is designed to perform multiple functions: serving as both the evolution platform (through surface display and selection) and the production platform (through high-level secretory expression). This multi-functional system replaces the traditional multi-system approach.
2Measurement precision
If traditional screening methods are used for large numbers of variants, then comprehensive screening is possible, but the process is time-consuming and inefficient
Solution Approach 1:
The patent replaces traditional mechanical/manual screening methods with fluorescence-activated cell sorting (FACS). This optical-based sorting system rapidly identifies and isolates cells displaying antibodies with desired properties, achieving both high throughput and accurate selection based on fluorescent signals from antigen binding.
3Productivity
If mammalian expression systems are optimized for high-level expression, then production efficiency is improved, but the system is not suitable for cloning and screening large numbers of variants
Solution Approach 1:
The patent performs preliminary evolution and selection of antibody variants within the mammalian expression system itself, before committing to high-level production. The FACS-based screening identifies promising variants that are then produced at high levels, ensuring that only well-validated sequences undergo resource-intensive production.
Solution Approach 2:
The patent introduces surface display as an intermediary mechanism that enables both cloning/evolution and high-level expression in the same system. By displaying antibody fragments on the cell surface, the system facilitates easy screening while maintaining the capacity for full-length antibody production.
Data Source
AI summary
The present disclosure provides methods of integrating therapeutic protein and antibody generation and/or selection, evolution and expression in a eukaryotic host for manufacturing in a single system. Therapeutic proteins, including antibodies, are generated, optimized and manufactured in the same eukaryotic host system. The disclosed system of Comprehensive Integrated Antibody Optimization (CIAO!™) allows for simultaneous evolution of protein performance and expression optimization.