Spatially Oriented Quantum Barcodes for 3D Cell Mapping
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Solution Overview
Problem
Current methods for obtaining spatial (2D or 3D) information from tissues or cells require time-consuming microscopic examination and are limited by the number of distinguishable fluorescent labels, which is typically 3 or 4 at a time, and isotope labeling is costly.
Innovation Solution
A method for spatially labeling targets using unique nucleic acid or mass barcodes that can be assembled from subcodes, allowing for an essentially limitless number of labels, detectable by sequencing or mass-spectrometry, without the need for microscopic examination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If fluorescent labels are used for spatial localization, then the number of distinguishable labels is limited to 3 or 4 at a time, but the method is simple and widely available
Solution Approach 1:
The labeling system is segmented into multiple independent nucleic acid barcode subcodes that can be individually synthesized and sequentially assembled on targets. Each subcode represents a distinct spatial or molecular identifier, allowing numerous labels to be combined without overlapping spectral constraints, thereby enabling high-plex spatial transcriptomics and proteomics.
Solution Approach 2:
The patent transitions from spectral dimension (fluorescent wavelengths) to sequence dimension (nucleic acid base sequences) for label differentiation. By encoding spatial and molecular information in the sequence space of DNA or RNA barcodes, the system achieves essentially limitless distinguishable labels through combinatorial sequence variation rather than relying on limited fluorophore spectra.
2Quantity of substance
If iterative staining with fluorescent labels is performed to increase the number of labels, then up to 40 or 50 labels can be achieved, but the time and cost increase significantly
Solution Approach 1:
Nucleic acid barcode subcodes are pre-synthesized and prepared in advance as a library of discrete molecular components. These pre-prepared subcodes can be rapidly introduced and assembled on targets in a single or few hybridization steps, eliminating the need for repeated staining cycles and significantly reducing the time required to achieve high-plex labeling.
Solution Approach 2:
Multiple barcode subcodes are merged or assembled together on the same target through sequential hybridization and ligation reactions. This combining approach allows numerous distinct labels to be accumulated on individual targets in parallel, achieving high multiplexing in a single experimental workflow rather than through sequential iterative staining.
3Quantity of substance
If isotope labeling is used to achieve up to 40 labeling options, then the number of labels increases, but the cost becomes very high
Solution Approach 1:
The patent employs inexpensive nucleic acid barcode subcodes as disposable labeling elements. These synthetic DNA or RNA sequences can be produced at very low cost through standard oligonucleotide synthesis, replacing expensive isotopic labels while providing equivalent or superior multiplexing capability through sequence diversity.
Solution Approach 2:
The system changes the distinguishing parameter from isotopic mass (which requires expensive reagents and mass spectrometry detection) to nucleic acid sequence composition. By varying the base sequence of barcode subcodes, the system achieves numerous distinguishable labels that can be detected through affordable sequencing technologies rather than costly mass spectrometry.
4Adaptability or versatility
If conventional fluorescent labeling methods are used, then the process is simple and widely available, but the number of distinguishable labels remains very limited
Solution Approach 1:
Nucleic acid barcode subcodes serve as intermediary molecular carriers that link spatial location and molecular identity information to detectable sequencing signals. These intermediary barcodes bridge the gap between the target (protein or nucleic acid in tissue) and the detection platform (sequencing machine), enabling high-plex information encoding that far exceeds direct fluorescent labeling capability.
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 high-throughput imaging of tissues or cells with an essentially limitless number of labels, allowing for qualitative and quantitative detection of DNA, RNA, and protein targets, overcoming the limitations of existing labeling methods.
Implementation Method 1
a portion of the sample is irradiated allowing the subcode to attach to only a portion of the sample
Data Source
AI summary
The invention is a method of simultaneously detecting the presence and spatial location of a target in a tissue sample by attaching an anchor to the target and assembling unique positional barcodes on the anchor. The method enables analyzing cellular targets in 3D.