Functionalized Capture Bead Quality Control via Fluorescent Probes
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Solution Overview
Problem
Current capture beads used in single cell sequencing methods, such as RNA-sequencing, face issues with batch-to-batch variability in quality and limited quality control methods, leading to potential false-positives and misinterpretation in phenotypic screening, particularly in organoids, due to inconsistent oligonucleotide strands and degradation.
Innovation Solution
Developed methods for preparing functionalized solid supports by reacting surface reactive nucleic acid molecules with other nucleic acid molecules to achieve consistent and high-quality beads, including the use of spacers and fluorescent probes for detection and quantification of functionalization, enabling more efficient oligo sequence confirmation and improved RNA sequencing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If commercially-available capture beads are used, then bead availability is ensured, but batch-to-batch variability in quality occurs leading to inconsistent oligonucleotide strands and degradation
Solution Approach 1:
The patent changes the chemical parameters of bead functionalization by using carboxyl-functionalized beads instead of amino-functionalized beads, and by optimizing the coupling reaction conditions (EDC/NHS chemistry, molar ratios, reaction time) to achieve consistent oligonucleotide attachment across batches. This parameter change resolves the quality inconsistency issue.
Solution Approach 2:
The patent implements quality control protocols that measure and monitor oligonucleotide coupling efficiency, bead quality parameters, and degradation levels. This feedback mechanism allows for detection and correction of batch-to-batch variability, ensuring consistent product quality.
2Measurement precision
If current quality control protocols are used, then some quality assessment is provided, but robust characterization and validation of synthesis batches is not achieved
Solution Approach 1:
The patent segments the quality control process into multiple independent assessment components: oligonucleotide sequence verification, coupling efficiency measurement, bead quality parameter assessment, and degradation analysis. This segmentation allows for comprehensive and robust validation of each aspect of bead quality.
Solution Approach 2:
The patent develops a multi-functional quality control protocol that can assess multiple parameters (sequence accuracy, coupling efficiency, bead integrity, degradation) using a unified approach. This universal protocol provides robust characterization across all synthesis batches.
3Adaptability or versatility
If oligonucleotide coupling to beads is performed, then capture functionality is achieved, but false-positives and misinterpretation in phenotypic screening occur due to artifacts
Solution Approach 1:
The patent converts the potential harm of assay artifacts into a benefit by implementing rigorous quality control that identifies and eliminates the sources of artifacts. The systematic validation process transforms quality concerns into assurance of accurate phenotypic screening results.
Solution Approach 2:
The patent applies preliminary anti-action by pre-validating bead quality and oligonucleotide coupling before use in phenotypic screening. This preliminary validation prevents artifacts and false-positives from occurring during the actual assay, ensuring reliable results.
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 methods enhance the quality and consistency of capture beads, increasing oligo density and capture efficiency, reducing false-positives, and providing robust quality control, thereby improving the accuracy of RNA sequencing results.
Implementation Method 1
reacting a solid support comprising a surface reactive nucleic acid molecule with another nucleic acid molecule so as to obtain a solid support comprising surface reactive nucleic acid molecules in sequence(s)
Implementation Method 2
contacting the solid support with a fluorescent probe, the fluorescent probe comprising an oligonucleotide, the oligonucleotide capable of binding moieties when present on the solid support
Data Source
AI summary
The present invention relates to functionalized solid supports and methods of making functionalized solid supports. Methods for preparing a population of high quality functionalized solid supports for use in various nucleic acid analysis methods are provided. The invention also provides methods for validation and quality control of the functionalization steps.