Recombinant Therapeutic Cells With Logic-Gated Tumor Activation
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Solution Overview
Problem
Existing cancer treatments often have undesirable side effects due to the non-specific killing of normal tissues, necessitating the development of compositions and methods for targeted tumor treatment.
Innovation Solution
Recombinant therapeutic cells equipped with genetic logic gates that regulate the expression of therapeutic agents based on multiple triggering events in the tumor microenvironment, allowing for dynamic and reversible expression of therapeutic molecules.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional cancer treatments are used to kill tumor cells, then therapeutic effect is achieved, but normal tissues are also damaged causing side effects
Solution Approach 1:
The patent applies local quality by making the therapeutic cell population heterogeneous, with individual cells expressing different combinations of sensor proteins that detect specific microenvironmental conditions. This allows different cell subsets to be activated in different spatial locations within the tumor, enabling localized therapy that spares normal tissues while treating tumor regions with specific microenvironmental characteristics
Solution Approach 2:
The patent utilizes parameter changes by designing sensor proteins that respond to specific microenvironmental parameters (such as pH, oxygen levels, or presence of specific molecules). The therapeutic effect is activated only when these parameters reach threshold values characteristic of the tumor microenvironment, providing selective activation that avoids damaging normal tissues with different parameter profiles
2Speed
If a single triggering event activates therapeutic expression, then treatment response is rapid, but specificity is reduced leading to off-target effects
Solution Approach 1:
The patent merges multiple sensing functions into a single therapeutic cell by co-expressing multiple sensor proteins that detect different microenvironmental conditions. The therapeutic gene is activated only when multiple specific conditions are simultaneously present, creating a logical AND gate that ensures high treatment specificity while maintaining rapid response through direct sensor-to-promoter coupling
Solution Approach 2:
The patent implements dynamics by creating a reversible system where therapeutic gene expression can be dynamically turned on and off based on the presence or absence of multiple microenvironmental conditions. This allows the system to adapt rapidly to changing conditions while maintaining specificity through the requirement for multiple simultaneous triggers
3Adaptability or versatility
If genetic circuits use recombinases for control, then logical regulation is achieved, but the system becomes irreversible
Solution Approach 1:
The patent inverts the conventional approach by using reversible transcriptional regulation instead of irreversible recombinase-based systems. Rather than permanently switching genes on or off through DNA recombination, the system uses reversible promoter activation controlled by sensor protein binding, allowing dynamic adaptation to changing microenvironmental conditions while maintaining logical control
Data Source
AI summary
The present disclosure relates to recombinant therapeutic cells comprising recombinant sensor proteins, such that a therapeutic molecule is expressed after the occurrence of two separate triggering events that are sensed by the sensor proteins. Nucleic acids, kits, and methods for making and using the recombinant therapeutic cells are also disclosed herein.