Reproducible FFPE Quality Control Material for Molecular Assays
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Solution Overview
Problem
Current methods for molecular assays using formalin-fixed, paraffin-embedded (FFPE) tissues lack reliable quality control materials that can mimic patient specimens and ensure consistent performance over time, leading to inconsistencies in assay validation and verification.
Innovation Solution
Development of reproducible FFPE quality control materials with defined concentrations of test cells and background cells, mixed with a gelling polymer, formalin-fixed, and embedded in paraffin, allowing for controlled detection of specific markers and providing a homogeneous, sustainable control for molecular assays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional FFPE tissue samples are used for quality control, then the material can be stored indefinitely and nucleic acids can be recovered decades after fixation, but the samples lack consistency and reliability for assay validation
Solution Approach 1:
The patent creates artificial quality control materials that are copies of real patient tissue samples but with controlled and defined characteristics. These synthetic samples replicate the FFPE processing and nucleic acid degradation patterns of genuine tissues while providing consistent, reproducible compositions for reliable assay validation and quality control.
2Manufacturing precision
If real patient specimens are used for quality control, then they provide authentic tissue characteristics, but they cannot be reproduced consistently and are limited in availability
Solution Approach 1:
The patent systematically controls and defines key parameters of the quality control materials, including cell type composition, nucleic acid content, and degradation levels. By adjusting these parameters, the artificial samples can be tailored to match various patient tissue types and assay requirements, achieving both reproducibility and versatility for different validation scenarios.
3Reliability
If defined concentrations of test cells and background cells are mixed with gelling polymer, then homogeneous and reproducible FFPE materials are created, but the manufacturing process becomes more complex
Solution Approach 1:
The manufacturing process is divided into distinct sequential steps: preparing test cell suspensions with defined concentrations, mixing with background cells, incorporating gelling polymer, molding, FFPE processing, and sectioning. This segmentation allows each step to be optimized and controlled independently, ensuring reproducibility while making the overall complex process manageable and standardized.
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
The solution provides highly reproducible FFPE materials that enable consistent detection of markers, ensuring accurate validation and verification of molecular assays, and can be used indefinitely, addressing the limitations of existing quality control materials.
Implementation Method 1
mixing the cellular material with a gelling polymer, creating a gel/cellular material; adding the gel/cellular material to a mold with a defined shape until the gelling polymer solidifies
Implementation Method 2
formalin fixing the sliced solidified material
Implementation Method 3
embedding the material in paraffin
Data Source
AI summary
This specification relates to Formalin-fixed embedded quality control material for use for validation, verification, and to run controls for molecular assays. The quality control material can be used for a variety of tissues and for a variety of molecular assays. The quality control material can be used in commercial labs for validation and limit-of-detection analyses.