Microfluidic T Cell Clonal Population Isolation
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Solution Overview
Problem
Current methods for modifying T cells for immunotherapy are unpredictable and unstable, leading to potential significant side effects and inefficiencies in targeting specific antigens, necessitating more precise approaches for genome editing and identification of genetically modified T cells.
Innovation Solution
A method using a microfluidic device with sequestration pens to maintain and expand T cells, allowing for the detection of specific genome edits through the absence of cell surface markers or the presence of nucleic acid sequences, enabling the generation of clonal populations of genetically modified T cells with enhanced specificity and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional methods are used to modify T cells for immunotherapy, then T cell modification can be achieved, but the modification is unpredictable and unstable leading to significant side effects
Solution Approach 1:
The invention segments the T cell modification process into distinct stages: (1) introduction of CRISPR-Cas9 components, (2) genome editing at specific target sites, (3) selection of successfully edited cells using fluorescent markers, and (4) expansion of selected clones. This segmentation allows precise control and verification at each step, improving reliability and reducing harmful off-target effects.
Solution Approach 2:
The invention implements feedback mechanisms through fluorescent reporter genes that provide real-time indication of successful genome editing. Cells that have undergone correct modification emit fluorescent signals, allowing immediate selection and exclusion of improperly modified cells, thereby ensuring stable and safe T cell therapeutics.
2Measurement precision
If conventional methods are used to modify T cells, then T cell modification can be achieved, but the antigen specificity is reduced leading to inefficiencies in targeting
Solution Approach 1:
The invention performs preliminary action by pre-designing specific guide RNA sequences that target exact genomic loci for T cell receptor or chimeric antigen receptor insertion. This pre-planned, precise targeting ensures high antigen specificity before the actual modification occurs, enabling efficient targeting of tumor antigens without off-target binding.
3Manufacturing precision
If genome editing is performed on T cells, then genetically modified T cells can be generated, but precise identification and selection of successfully edited cells is difficult
Solution Approach 1:
The invention employs color changes through fluorescent reporter genes that are co-introduced with the genome editing components. Successfully edited cells exhibit specific fluorescent colors or intensities, providing a simple visual and measurable indicator of editing success. This eliminates the need for complex sequencing or PCR-based detection methods.
Data Source
AI summary
Methods are described herein for isolating clonal populations of T cells having a defined genetic modification. The methods are performed, at least in part, in a microfluidic device comprising one or more sequestration pens. The methods include the steps of: maintaining individual T cells (or precursors thereof) that have undergone a genomic editing process in corresponding sequestration pens of a microfluidic device; expanding the T cells into respective clonal populations of T cells; detecting, in one or more T cells of each clonal population, the absence of a cell surface marker that was present in the individual T cells (or precursors thereof); and detecting, in one or more T cells of each clonal population, the presence of a first nucleic acid sequence that is indicative of the presence of an on-target genome edit in the clonal population of T cells. Also described are compositions comprising one or more clonal populations of T cells isolated according to the methods disclosed herein.