Radiation Biodosimetry via Gene Expression Assay
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Solution Overview
Problem
Current methods lack the ability to quickly and accurately determine the absorbed dose of radiation in individuals or populations following a radiological event, which is critical for effective triage and treatment.
Innovation Solution
A radiation biodosimetry assay system that uses nucleic acid amplification reactions and a mathematical algorithm to estimate the absorbed dose of radiation based on the expression pattern of radiation-modulated genes in peripheral blood mRNA.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If conventional radiation dosimetry methods are used, then measurement precision may be adequate, but the speed of determination is too slow for effective triage and treatment
Solution Approach 1:
The patent replaces conventional mechanical/physical dosimetry methods with a biological assay system that measures gene expression patterns in peripheral blood cells. This substitution enables rapid biodosimetry by detecting radiation-induced changes in RNA levels of specific genes, achieving both speed and accuracy requirements for radiation emergency response
Solution Approach 2:
The patent introduces an intermediary biological system (peripheral blood cells and their gene expression patterns) that mediates between radiation exposure and dose measurement. This intermediary provides a readable biological signal that can be quickly analyzed to determine absorbed dose, bridging the gap between radiation exposure and rapid dosimetry assessment
2Productivity
If rapid radiation dose assessment is implemented, then triage speed improves, but measurement precision and reliability may be compromised
Solution Approach 1:
The patent develops a universal biodosimetry assay that can process multiple samples simultaneously and provides reliable dose estimates across different radiation exposure scenarios. The system uses a panel of radiation-modulated genes that collectively provide robust dose assessment, enabling high-throughput processing while maintaining reliability for treatment triage decisions
Solution Approach 2:
The patent measures changes in gene expression parameters (RNA levels) that occur in response to radiation exposure. By monitoring the magnitude and pattern of these parameter changes across multiple genes, the system reliably determines absorbed dose while maintaining high throughput capability for rapid triage
3Measurement precision
If a comprehensive panel of radiation-modulated genes is analyzed, then measurement precision improves, but device complexity and assay cost increase
Solution Approach 1:
The patent segments the radiation dose measurement function into multiple independent gene expression measurements. By analyzing a panel of radiation-modulated genes individually through separate nucleic acid amplification reactions, the system achieves high measurement precision while keeping each individual assay reaction relatively simple and manageable
4Measurement precision
If gene expression analysis is performed at multiple time points, then measurement precision improves, but loss of time and sample requirements increase
Solution Approach 1:
The patent identifies and characterizes gene expression patterns at multiple time points during the assay development phase. This preliminary characterization enables the selection of optimal single or combined time points for actual biodosimetry applications, reducing the need for extensive multi-time-point sampling while maintaining measurement precision
Data Source
AI summary
Disclosed herein are compositions and methods for accurately estimating the absorbed dose of radiation indicated by a subject based on the expression pattern of a panel of radiation-modulated (RM) genes at various time points following exposure of the subject to ionizing radiation.