GILA Assay for High-Throughput Cellular Transformation Screening
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Solution Overview
Problem
Current methods for assessing cellular transformation and drug sensitivity, such as the soft-agar assay, are slow, labor-intensive, imprecise, and not suitable for high-throughput screens, and do not effectively mimic the three-dimensional environment necessary for cancer cell growth, limiting their ability to identify personalized treatment options for cancer patients.
Innovation Solution
The development of a Growth In Low Attachment (GILA) assay that measures cell viability and growth in low attachment conditions, allowing for high-throughput drug and genetic screens that correlate strongly with the soft-agar assay, enabling the identification of drugs that inhibit oncogenic growth and the detection of transformed cells, including patient-derived cancer cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the soft-agar assay is used to assess cellular transformation, then the assay accurately reflects tumorigenicity and three-dimensional growth conditions, but the assay is slow, labor-intensive, and not suitable for high-throughput screens
Solution Approach 1:
The invention changes the physical state parameter of the assay system by replacing soft-agar with a liquid suspension system. This parameter change maintains the ability to assess anchorage-independent growth (reliability) while enabling automated liquid handling and high-throughput screening (productivity). The liquid medium allows for standardized incubation and automated reading protocols.
Solution Approach 2:
The invention replaces the manual, labor-intensive colony counting process with automated optical detection systems. Plate readers and image analysis software automatically quantify cell growth and colony formation, substituting mechanical manual counting with automated optical/electronic detection, thereby dramatically increasing throughput while maintaining accuracy.
2Reliability
If the soft-agar assay is used to assess cellular transformation, then the assay provides three-dimensional growth conditions that mimic cancer cell environment, but the assay is imprecise and inconsistent due to subjective definitions of colonies
Solution Approach 1:
The invention replaces subjective visual colony assessment with automated optical detection systems. Plate readers and image analysis software provide objective, quantitative measurements of cell growth and colony formation, eliminating inter-observer variability and subjective judgment criteria while maintaining three-dimensional growth conditions.
Solution Approach 2:
The invention implements automated feedback loops where growth data is continuously monitored and quantified by automated systems. The objective measurement systems provide consistent, reproducible data that can be automatically analyzed and compared across experiments, eliminating the inconsistency associated with subjective colony definitions.
3Productivity
If standard plates that permit efficient attachment are used for drug and genetic screens, then the screens are routine and efficient, but the screens do not accurately reflect the natural environment of cancer cells which require anchorage-independent growth
Solution Approach 1:
The invention changes the surface attachment parameter from high-attachment standard plates to low-attachment plates or liquid suspension conditions. This parameter change creates anchorage-independent growth conditions that biologically resemble the cancer microenvironment while still allowing for standardized, high-throughput screening formats.
Data Source
AI summary
A method for detecting oncogenic growth and viability, and/or degree of cellular transformation and/or identifying an agent that inhibits cellular transformation is disclosed. The method including: providing a cellular sample, such as a sample of cells obtained from a subject or a cell line; culturing the cellular sample in low attachment conditions; and detecting growth and7or cell viability of the sample, wherein increased growth relative and/or viability relative to a control or control level indicative of basal growth and/or viability indicates cellular transformation. In some embodiments, the method includes introducing a n expression vector into cells of the cellular sample, wherein the expression vector comprises a gene product expression sequence being tested for transformation ability. In some embodiments the cellular sample is contacted with a test agent and growth and/or cell viability of the sample is determined to determine if the agent inhibits transformation.