Directed Bacteria Targeting Cancer Cells Through Heat and pH
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Solution Overview
Problem
Cancer cells exhibit altered metabolic pathways characterized by increased heat output, decreased pH, and altered membrane composition, which are not effectively targeted by current therapies.
Innovation Solution
Engineered biologic organisms, such as viruses and bacteria, are adapted to recognize and infiltrate cancer cells by exploiting these metabolic markers, including heat, pH, and membrane alterations, and deliver therapeutic agents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional cancer therapies are used, then cancer cells are treated, but they do not effectively target the unique metabolic markers of cancer cells
Solution Approach 1:
The patent modifies physical and chemical parameters of bacteria to enable them to respond to cancer cell metabolic markers. Bacteria are adapted to detect pH changes, temperature variations, and membrane potential differences that characterize cancer cells, allowing precise targeting based on these physiological parameters.
Solution Approach 2:
The engineered bacteria autonomously navigate to and identify cancer cells using their inherent sensory capabilities and metabolic responses. They self-direct toward the metabolic signatures of cancer cells without requiring external guidance systems, performing the targeting function independently once introduced into the system.
2Manufacturing precision
If bacteria are engineered to target cancer cells, then therapeutic precision is improved, but system complexity increases
Solution Approach 1:
The patent extracts and isolates specific sensory and metabolic pathways in bacteria that are responsible for detecting cancer cell markers. By focusing on and enhancing only the necessary detection and targeting mechanisms rather than engineering entire complex systems, the approach achieves precision while managing complexity.
Solution Approach 2:
The engineered bacteria perform multiple functions: they detect pH changes, sense temperature variations, respond to membrane potential, and deliver therapeutic payloads. This multi-functionality is achieved by leveraging the bacteria's inherent biological capabilities rather than adding separate mechanical or electronic systems for each function.
3Object-affected harmful factors
If bacteria exploit metabolic markers like heat and pH, then cancer cell destruction is enhanced, but selectivity challenges arise
Solution Approach 1:
The patent creates local responses in bacteria that are activated only in the specific microenvironment of cancer cells. The bacteria are engineered to trigger therapeutic mechanisms only when they simultaneously detect the characteristic combination of pH, temperature, and membrane potential markers, ensuring localized action at the cancer cell site.
Solution Approach 2:
The bacteria are pre-engineered with the necessary sensory mechanisms and therapeutic payloads before introduction. They are prepared to immediately respond to cancer cell markers upon contact, performing the destructive action only after confirming the presence of multiple cancer-specific metabolic signatures, thereby ensuring selectivity.
Data Source
AI summary
This invention teaches systems and methods for identifying, targeting and destroying cancer cells. As cells progress from a normal to a cancerous state their accelerated metabolic rates and adapted pathways generate a higher heat signature that serves as a targeting beacon for a specialized cell-killing vector. Suitable vectors include modified/adapted intracellular bacteria. Especially preferred is the bacterial vector because of its ease of production. The bacterial vector is selectively targeted to recognize cells whose temperature is slightly elevated and ambient pH suppressed due to cancer related alterations to metabolism. An additional targeting feature, such as recognition of the MCT4 transmembrane protein exaggeratively expressed on the cancer cell membrane, may provide additional targeting. Embodiments featuring facultative extracellular and intracellular growth capable bacteria have the feature that culture conditions for producing vector can be optimized solely for the one organism and need not be compromised to support or optimize host cell maintenance.