Multimeric T-Cell Modulatory Polypeptides for Epitope-Specific Immune Response
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Solution Overview
Problem
Current technologies lack effective methods for modulating T-cell activity and immune responses with specificity, as existing immunomodulatory strategies often fail to selectively target T cells expressing specific epitopes and co-immunomodulatory proteins.
Innovation Solution
Development of T-cell modulatory multimeric polypeptides (TMMPs) comprising class I HLA polypeptides, β2 microglobulin, and epitope-presenting peptides, which bind to T-cell receptors with enhanced specificity and affinity, allowing for selective modulation of T-cell activity and immune responses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional immunomodulatory strategies are used, then T-cell activity can be modulated, but specificity for targeting T cells expressing particular epitopes and co-immunomodulatory proteins is insufficient
Solution Approach 1:
The TMMP is segmented into distinct functional domains: an MHC class I heavy chain domain for epitope presentation, a β2-microglobulin domain for MHC complex stability, and one or more co-immunomodulatory protein domains. This segmentation allows each domain to independently contribute to specific T-cell recognition, thereby achieving high specificity for T cells expressing particular epitopes and co-immunomodulatory proteins
Solution Approach 2:
The invention creates a composite polypeptide structure by fusing multiple immunologically relevant domains into a single TMMP molecule. This composite structure combines MHC class I heavy chain, β2-microglobulin, and co-immunomodulatory protein domains, enabling simultaneous engagement of multiple T-cell receptors and co-immunomodulatory proteins, thus enhancing both specificity and selective targeting capability
2Adaptability or versatility
If T-cell modulation is achieved through conventional methods, then immune response can be influenced, but the ability to induce both epitope-specific and non-specific T-cell responses is limited
Solution Approach 1:
The TMMP is designed with multi-functionality to simultaneously induce epitope-specific T-cell responses through MHC class I epitope presentation and non-specific T-cell responses through co-immunomodulatory protein engagement. This universal design allows a single polypeptide to perform multiple immunomodulatory functions, enhancing both the versatility of immune response modulation and the reliability of therapeutic outcomes
3Strength
If existing immunomodulatory approaches are employed, then some T-cell activity modulation occurs, but enhanced affinity and specificity for T-cell receptor binding is not achieved
Solution Approach 1:
The invention merges multiple immunologically active domains (MHC class I heavy chain, β2-microglobulin, and co-immunomodulatory protein domains) into a single integrated TMMP structure. This merging creates a unified polypeptide that binds to T-cell receptors with enhanced affinity and specificity, while the modular nature of the fusion allows for controlled complexity through standardized domain architectures
Data Source
AI summary
The present disclosure provides T-cell modulatory multimeric polypeptides that comprise an immunomodulatory polypeptide, an epitope-presenting peptide, and class I MHC polypeptides. A T-cell modulatory multimeric polypeptide is useful for modulating the activity of a T cell, and for modulating an immune response in an individual.