PI3K Pathway Assessment via FOXO Transcription Factor Modeling
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Solution Overview
Problem
Current methods for identifying cancer, particularly breast cancer, driven by the PI3K cellular signaling pathway are limited as they primarily focus on HER2 receptor expression levels, failing to detect tumors driven by downstream signaling pathways, leading to inadequate characterization and treatment response.
Innovation Solution
A method using mathematical modeling to infer PI3K cellular signaling pathway activity based on the expression levels of target genes, specifically through determining the level of the FOXO transcription factor, allowing for improved characterization of tumors and prediction of treatment responses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If HER2 receptor expression levels are measured to identify breast cancer patients, then patients with HER2 over-expression can be identified, but tumors driven by downstream PI3K signaling pathway cannot be detected
Solution Approach 1:
The patent uses FOXO transcription factor as an intermediary biomarker to indirectly measure PI3K pathway activity. Instead of directly measuring complex pathway interactions, the FOXO level serves as a mediator that reflects the pathway's functional state, enabling detection of PI3K-driven tumors through a single measurable parameter
Solution Approach 2:
The patent replaces complex mechanical/biological measurement systems (direct pathway activity measurement) with a simplified molecular measurement system (FOXO transcription factor level assessment). This substitution allows pathway activity inference through standard gene expression analysis rather than complex pathway-specific assays
2Measurement precision
If downstream signaling pathway activity is directly measured, then accurate pathway characterization is achieved, but measurement complexity and cost increase
Solution Approach 1:
FOXO transcription factor serves as a measurable intermediary that correlates with PI3K pathway activity. By measuring FOXO levels through standard gene expression techniques, the patent indirectly captures pathway activity without requiring direct measurement of complex signaling interactions
Solution Approach 2:
The patent creates a simplified copy or proxy measurement system where FOXO expression levels replicate the information contained in full pathway activity measurements. This copy enables pathway assessment using conventional, well-established molecular biology techniques
Data Source
AI summary
The present invention relates to a method comprising inferring activity of a PI3K cellular signaling pathway in a tissue and/or cells and/or a body fluid of a medical subject based at least on expression levels of one or more target gene(s) of the PI3K cellular signaling pathway measured in an extracted sample of the tissue and/or the cells and/or the body fluid of the medical subject. The present invention further relates to an apparatus comprising a digital processor configured to perform such a method, a non-transitory storage medium storing instructions that are executable by a digital processing device to perform such a method, and a computer program comprising program code means for causing a digital processing device to perform such a method.