Cell Lineage Identification Using SNP Profiles in Recombinant Cell Culture
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Solution Overview
Problem
Traditional isoenzyme analysis methods for identifying cell lineages and cell bank characterization in recombinant therapeutic production are cumbersome, require scarce reagents, and lack sufficient sensitivity to meet current standards.
Innovation Solution
A method using PCR and sequencing to analyze SNPs in five highly preserved genes (Ago1, Cytb, Hdac1, Srsf1, and Top2b) to create a species-specific genetic profile for accurate cell lineage and bank characterization, eliminating the need for reagents and enhancing sensitivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional isoenzyme analysis is used for cell lineage identification, then species-specific mobility patterns can be obtained, but the method becomes cumbersome and requires scarce reagents
Solution Approach 1:
The patent replaces the mechanical/enzymatic isoenzyme analysis system with a molecular biology-based PCR and sequencing system. Instead of relying on electrophoretic mobility of enzymes, the invention uses DNA amplification and sequence analysis to identify species-specific genetic markers, thereby eliminating the need for scarce enzymatic reagents and simplifying the operational procedure.
Solution Approach 2:
The patent uses PCR amplification to create multiple copies of specific DNA regions containing species-specific polymorphisms. By amplifying these genetic markers in vitro, the method generates sufficient material for analysis without requiring scarce natural reagents, thus resolving the contradiction between measurement precision and ease of operation.
2Reliability
If traditional isoenzyme analysis is used for cell lineage identification, then species distinction can be made, but the sensitivity is insufficient to meet current standards
Solution Approach 1:
The patent changes the detection parameter from enzymatic activity (isoenzyme mobility) to genetic sequence information (DNA polymorphisms). By targeting specific DNA regions with species-specific variations and using sensitive PCR amplification followed by sequencing, the method achieves significantly higher detection sensitivity and reliability compared to traditional isoenzyme analysis.
3Measurement precision
If isoenzyme analysis reagents are used, then species-specific patterns can be detected, but the reagents become scarce and costly
Solution Approach 1:
The patent uses PCR amplification to synthesize multiple copies of target DNA sequences from minimal starting material. This in vitro copying process generates abundant amplification products from trace amounts of genomic DNA, eliminating dependence on scarce natural reagents and enabling routine application of the species identification method.
Solution Approach 2:
The patent employs DNA polymerase and primers that can be readily synthesized and stored, which then autonomously amplify the target sequences without requiring additional scarce reagents. The system is self-sufficient, using only common laboratory reagents (nucleotides, buffer, polymerase) that are readily available, thus resolving the reagent scarcity issue.
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
This method provides a robust, cost-effective, and sensitive approach to identify cell lineages and detect cross-contamination, achieving high accuracy and efficiency in identifying species of origin and detecting contamination as low as 5%.
Implementation Method 1
A method using PCR and sequencing to analyze SNPs in five highly preserved genes
Implementation Method 2
determining from the nucleic acid molecules isolated from said recombinant cells in culture the presence of polymorphisms or SNPs at at least 5 different positions
Data Source
AI summary
Provides herein is a method for identifying the specific cell lineage of cells in culture comprising the steps of determining from the nucleic acid molecules isolated from said recombinant cells in culture the presence of polymorphisms or SNPs at at least 5 different positions within at least five genes contained in said nucleic acid molecules, obtaining a genetic profile from the determination of the previous step, and identifying the cell lineage of said cells in culture from said genetic profile, and wherein the recombinant cells produce a recombinant protein.