Spatially Barcoded Oligonucleotide Arrays for Tissue Analyte Mapping
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for studying spatial heterogeneity in tissues fail to provide comprehensive data on the position of single cells within a biological sample, relying on pre-defined markers that introduce selection bias and are costly and labor-intensive.
Innovation Solution
A method involving spatially barcoded oligonucleotide arrays that utilize capture probes with spatial barcodes and capture domains to identify the location of biological analytes in a sample by determining the sequences of these barcodes and analytes, allowing for precise localization and profiling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If spatially barcoded oligonucleotide arrays are used, then measurement precision and spatial resolution are improved, but device complexity increases
Solution Approach 1:
The device segments the tissue sample into discrete spatial locations, each represented by a unique spatial barcode. Capture probes are divided into modular components: a capture domain specific to the analyte and a spatial barcode domain. This segmentation allows high spatial resolution without requiring a monolithic complex system, as each probe independently contributes to the overall spatial map.
Solution Approach 2:
The patent adds a spatial dimension to traditional oligonucleotide array analysis by incorporating spatial barcodes that encode positional information. This transforms the data from simple analyte detection to three-dimensional spatial mapping, enabling precise localization of biological analytes within tissue architecture without proportionally increasing physical device complexity.
2Loss of information
If spatially barcoded arrays are used, then information completeness is improved, but manufacturing complexity increases
Solution Approach 1:
The spatial barcodes are pre-synthesized and incorporated into capture probes during manufacturing, rather than being added during sample analysis. This preliminary encoding of spatial information allows the array to be manufactured using standard oligonucleotide synthesis techniques, avoiding the need for complex post-fabrication spatial encoding steps.
Solution Approach 2:
The patent uses oligonucleotide synthesis to create precise copies of capture probe sequences with integrated spatial barcodes. Each probe is a synthetic copy containing both the analyte-specific capture domain and the spatial barcode, allowing standardized manufacturing processes to produce complex spatially-resolved arrays without manual positioning or complex assembly.
3Measurement precision
If comprehensive spatial profiling is performed, then measurement precision is improved, but cost increases
Solution Approach 1:
The spatial barcodes serve multiple functions: they encode spatial position, enable data normalization across different tissue sections, and provide a framework for integrating multiple analyte measurements. This multi-functionality allows a single array design to support comprehensive spatial profiling of multiple analytes without proportionally increasing reagent costs, as the same spatial barcode infrastructure serves all measurements.
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 accurate spatial profiling of biological analytes with reduced bias and cost, providing detailed information on cell morphology, function, and interactions within tissues.
Implementation Method 1
a capture probe of the plurality of capture probes comprises (i) a spatial barcode and (ii) a capture domain that binds specifically to a biological analyte in the biological sample
Data Source
AI summary
This disclosure relates to methods for spatial profiling of analytes present in a biological sample. Also provided are methods for using spatially barcoded substrates to detect a biological analyte in a cell culture, an organism, and organoid. Also provided are methods for using spatially barcoded substrates to detect the temporal profile of a biological analyte.