Metabolite Extraction from FFPE Samples
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Solution Overview
Problem
Metabolic profiling of formalin-fixed paraffin-embedded (FFPE) samples is challenging due to chemically reactive conditions, which complicates the reliable detection of metabolites and hinders comprehensive metabolic data analysis.
Innovation Solution
Developed methods for detecting and measuring metabolites in FFPE samples, including the use of mild extraction techniques and a cassette design to minimize extraction volume and maximize metabolite yield, allowing for the determination of tumor status by comparing metabolite expression levels between samples.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If FFPE samples are used for metabolic profiling, then sample preservation and storage are improved, but metabolite detection reliability deteriorates due to chemically reactive conditions
Solution Approach 1:
The patent extracts metabolites from FFPE samples using specific extraction protocols that overcome the chemically reactive conditions. The extraction process isolates metabolites from the fixed tissue matrix, enabling reliable detection despite the formalin fixation that preserves tissue structure.
Solution Approach 2:
The patent employs parameter changes in the extraction process, including optimizing solvent composition, extraction temperature, and incubation time, to maximize metabolite recovery from FFPE samples while accounting for the chemical modifications introduced by formalin fixation.
2Ease of manufacture
If conventional extraction methods are used on FFPE samples, then procedure simplicity is maintained, but metabolite yield and detection accuracy deteriorate
Solution Approach 1:
The extraction process is segmented into multiple sequential steps including deparaffinization, hydration, and metabolite extraction, with each step optimized to address specific challenges of FFPE samples while maintaining overall procedural simplicity.
Solution Approach 2:
Preliminary deparaffinization and hydration steps are performed before metabolite extraction to prepare the FFPE samples, removing paraffin interference and restoring tissue permeability, which improves subsequent metabolite recovery without significantly complicating the overall workflow.
3Quantity of substance
If large extraction volumes are used, then metabolite recovery is improved, but resource consumption and processing time deteriorate
Solution Approach 1:
The patent enhances extraction efficiency by combining moderate-volume extractions with repeated cycling and concentration steps, effectively increasing the dimensional complexity of the extraction process to achieve high metabolite recovery without proportionally increasing resource consumption.
Solution Approach 2:
Multiple extraction cycles are performed on the same sample, with each cycle targeting different metabolite fractions, effectively creating multiple 'copies' of the extraction process to maximize metabolite recovery from a single sample while minimizing total resource use.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables reliable metabolic data extraction and analysis from FFPE samples, facilitating the identification of differentially expressed metabolites for tumor status determination, thereby supporting personalized medicine and cancer diagnosis.
Implementation Method 1
extracting the one or more metabolites from the FFPE biological sample
Data Source
AI summary
The invention provides methods and compositions to evaluate biological samples. The methods comprise obtaining a formalin fixed paraffin embedded (FFPE) preparation of the biological sample, and detecting the presence of one or more metabolites in the FFPE preparation.