HLA-Engineered K562 Cell Lines for Diverse Peptide Presentation
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Solution Overview
Problem
Existing AI models for cellular immunology studies face limited generalization due to insufficient diversity and representativeness of training data, particularly in cell lines lacking HLA expression, which hampers the performance of predictive models.
Innovation Solution
Transduce HLA genes into cell lines using lentivirus and introduce AIRE gene expression to induce tissue-specific proteins, altering the gene and protein profiles, thereby changing the peptides presented by HLA molecules.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If cell lines lacking HLA expression are used for immunology studies, then the cell lines are easier to manipulate and lack autoimmune reactivity, but the HLA-related cellular immunology studies are limited due to insufficient HLA presentation diversity
Solution Approach 1:
The patent changes the gene expression profile parameter by introducing the AIRE gene, which fundamentally alters the protein expression landscape of the cell line. This enables the cell line to present a diverse array of tissue-specific peptides through HLA molecules, transforming it from a non-presenting cell line into one with rich HLA presentation capabilities while maintaining the original cell line's ease of manipulation.
Solution Approach 2:
The AIRE gene acts as an intermediary that bridges the gap between the cell line's original simplicity and the need for HLA presentation diversity. By expressing AIRE, the cell line can transcribe and translate tissue-specific proteins that are then presented by HLA molecules, effectively mediating between the conflicting requirements of ease of manipulation and presentation diversity.
2Device complexity
If training data for AI models is limited to conventional cell lines, then the model development process is simpler, but the generalization ability of the model is limited due to insufficient diversity and representativeness
Solution Approach 1:
The patent changes the biological parameter of the cell line by introducing AIRE expression, which fundamentally alters the peptide presentation profile. This generates new training data with enhanced diversity and representativeness, enabling AI models to learn from a broader range of HLA-peptide interactions and thereby improving generalization ability without significantly increasing development complexity.
Solution Approach 2:
The patent performs preliminary action by pre-establishing cell lines with AIRE expression and characterized HLA presentation profiles before they are used for AI model training. This preliminary preparation ensures that the training data is already optimized for diversity and representativeness, reducing the need for complex data generation processes during model development.
3Adaptability or versatility
If the cell line expresses tissue-specific proteins through AIRE, then the diversity of HLA-presented peptides is increased, but the cell line's original protein profile is altered
Solution Approach 1:
The patent introduces dynamic control of the cell line's protein profile through the AIRE gene. The AIRE expression can be regulated to dynamically adjust the presentation of tissue-specific peptides while maintaining the core identity of the cell line. This dynamic capability allows the cell line to adapt its protein profile for specific experimental needs while preserving stability for others.
Solution Approach 2:
The patent applies local quality by selectively expressing tissue-specific proteins through AIRE in a controlled manner. Rather than fundamentally altering the entire cell line's identity, the AIRE system enables localized expression of specific tissue proteins that are then presented by HLA molecules, maintaining the overall stability of the cell line while adding specific functional characteristics.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enhances the diversity of peptide sequences presented by HLA, improving the performance of AI models by increasing the variety of peptides available for training, thus enhancing predictive capabilities.
Implementation Method 1
HLA genes are lentiviral-transduced into cell lines, so that the cell lines express HLA molecules
Implementation Method 2
AIRE is a transcription factor that can induce the expression of tissue-specific proteins that were originally only expressed in specific cells
Implementation Method 3
The T cell receptor (TCR) on the surface of each T cell recognizes a specific antigen presented by the HLA (Human Leukocyte Antigen) complex on an antigen-presenting cell
Data Source
AI summary
The invention provides a method for changing an HLA presentation of peptides in a cell line, a cell line with a changed HLA presentation of peptides and a use thereof. The method for changing the HLA presentation includes following steps. HLA genes are lentiviral-transduced into K562 cell lines, so that the cell lines express HLA molecules. Afterwards, the cell lines expressing the HLA molecule are transduced with a lentiviral vector carrying an AIRE gene. Through the overexpression of AIRE, a gene transcription profile and a protein profile expressed by the cell line are changed, resulting in a change in a type of peptide presented by the HLA molecule.