Vaccine Epitope Selection via HLA Genotype Segmentation

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Solution Overview

Problem

Current epitope-based vaccine design methods fail to adequately cover genetically heterogeneous human populations, as they do not consider individual variations in MHC proteins, leading to suboptimal immune response coverage and protection.

Innovation Solution

A computer-implemented method that selects amino acid sequences for inclusion in a vaccine by identifying immune profile response values for each candidate sequence, generating representative immune profiles for a population, and optimizing the selection to minimize the likelihood of no immune response across all individuals, thereby ensuring broader population coverage.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If supertype-based methods are used to select epitopes, then the selection process is simplified, but coverage for populations with diverse HLA backgrounds deteriorates

Engineering Contradiction:
Improveepitope selection processVSAvoidpopulation coverage
Core Design Contradiction:
Ease of manufactureVSReliability

Solution Approach 1:

The patent segments the population into distinct HLA genotype groups and creates separate epitope selections for each segment. Instead of using a single supertype-based selection that treats all populations uniformly, the method divides the target population into genetically heterogeneous subgroups and optimizes epitope coverage for each segment independently, thereby resolving the contradiction between simplicity and coverage.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The patent applies local quality by tailoring the epitope selection to match the specific HLA background of each population segment. Rather than applying a uniform supertype-based approach globally, the method adjusts the epitope set locally for each HLA genotype group, ensuring that each segment receives an optimized selection matched to its genetic characteristics.

Inventive Principle:
Principle #3Local quality

2Productivity

If allele-based approaches are used to maximize average response likelihood, then computational optimization is improved, but individual citizen protection deteriorates

Engineering Contradiction:
Improvecomputational optimizationVSAvoidindividual protection
Core Design Contradiction:
ProductivityVSReliability

Solution Approach 1:

The patent segments the population into discrete HLA genotype groups and performs separate epitope optimizations for each segment. This segmentation allows the computational method to address individual genetic variations explicitly, ensuring that each citizen group receives an epitope set tailored to their specific HLA background rather than relying on average responses.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The patent changes the optimization parameter from maximizing average response likelihood to maximizing minimum response likelihood across all HLA genotype segments. This parameter transformation shifts the objective function to ensure that even the least-covered genetic group achieves adequate protection, thereby guaranteeing individual citizen protection while maintaining computational tractability.

Inventive Principle:
Principle #35Parameter changes

3Measurement precision

If experimental screening of large peptide sets is performed, then epitope identification accuracy is improved, but time and cost increase

Engineering Contradiction:
Improveepitope identification accuracyVSAvoidscreening time
Core Design Contradiction:
Measurement precisionVSLoss of time

Solution Approach 1:

The patent performs preliminary computational filtering of peptide candidates based on predicted binding affinity to multiple HLA alleles before conducting experimental screening. By pre-screening in silico and selecting only the most promising candidates for wet-lab validation, the method maintains high epitope identification accuracy while dramatically reducing the time and resources required for experimental screening of large peptide sets.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The patent uses computational models and algorithms to create virtual representations of peptide-MHC interactions, allowing in silico testing of numerous peptide candidates before physical experimentation. This copying approach enables accurate prediction of epitope binding without the need for extensive experimental screening of every candidate, thereby reducing time and cost while maintaining identification accuracy.

Inventive Principle:
Principle #26Copying

Data Source

PatentUS20240170097A1Method and system for optimal vaccine design
Publication Date: 2024.05.23 NEC CORP
  • US20240170097A1 patent drawing
  • US20240170097A1 patent drawing
  • US20240170097A1 patent drawing

AI summary

A computer-implemented method of selecting one or more amino acid sequences for inclusion in a vaccine from a set of predicted immunogenic candidate amino acid sequences includes identifying an immune profile response value for each candidate amino acid sequence with respect to each one of a plurality of sample components of an immune profile. The immune profile response value represents whether the respective candidate amino acid sequence results in an immune response for the sample components of the immune profile. A plurality of immune profiles are retrieved for a population. A plurality of representative immune profiles are generated for the population. The representative immune profiles overlap with the sample components of the immune profiles. The one or more amino acid sequences for inclusion in the vaccine that minimises a likelihood of no immune response for each representative immune profile, based on the immune profile response values, are selected.