Spatial Barcoded Oligonucleotides for Single-Cell Analyte Mapping
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Solution Overview
Problem
Current methods for studying spatial heterogeneity in tissues fail to provide comprehensive data on analyte levels and positions of cells within a biological sample, lacking information on the specific position of single cells in relation to their microenvironment.
Innovation Solution
The development of spatial arrays using oligonucleotides with spatial barcodes and capture domains, which are used to bind analytes from biological samples, allowing for the determination of analyte locations by hybridizing and ligating oligonucleotides to form capture probes, and subsequent identification of bound analytes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If traditional techniques are used to study spatial heterogeneity, then data collection is simpler, but comprehensive spatial information and analyte level data are not obtained
Solution Approach 1:
The method segments the array preparation into distinct functional components: oligonucleotides with spatial barcodes, capture domains for specific analytes, and ligation handles. This segmentation allows each component to be optimized independently while maintaining comprehensive spatial information capture.
Solution Approach 2:
The patent applies preliminary action by pre-attaching spatial barcodes to oligonucleotides before hybridization to the tissue section. This ensures that spatial information is captured from the beginning of the process, eliminating the need for post-processing spatial mapping and reducing information loss.
2Measurement precision
If capture probes are designed to capture specific analytes, then analyte detection precision improves, but the ability to capture substantial population of analytes decreases
Solution Approach 1:
The capture probe design incorporates universality by combining specific capture domains (for target analyte binding) with universal spatial barcode sequences. This allows the same probe structure to capture specific analytes while maintaining the ability to record spatial information, thus achieving both precision and versatility.
Solution Approach 2:
The patent uses composite materials by creating capture probes that are composites of different functional elements: spatial barcode sequences, capture domain sequences, and ligation handles. This composite structure enables the probe to perform multiple functions simultaneously - spatial recording, analyte capture, and signal generation.
3Manufacturing precision
If spatial arrays are prepared with detailed capture domains, then spatial resolution improves, but the complexity of array preparation increases
Solution Approach 1:
The method applies self-service by using the tissue section itself as the substrate for array preparation. The oligonucleotides hybridize directly to the tissue section in situ, eliminating the need for separate substrate preparation and simplifying the manufacturing process while maintaining high spatial resolution.
Solution Approach 2:
The patent replaces mechanical array preparation methods with biochemical hybridization. Instead of physically assembling complex arrays, the system uses complementary base pairing to automatically position capture probes at their correct spatial locations, reducing preparation complexity while improving resolution.
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 the precise determination of analyte locations within biological samples, providing detailed spatial information on analyte distribution and cell morphology, differentiation, and behavior, thereby improving our understanding of tissue function and disease mechanisms.
Implementation Method 1
a primer of the plurality of primers is substantially complementary to a portion of the oligonucleotide
Implementation Method 2
extending the primer using the oligonucleotide as a template, thereby generating a first oligonucleotide
Implementation Method 3
ligating a second oligonucleotide to the 3′ end of the first oligonucleotide
Data Source
AI summary
The present disclosure relates to compositions and methods for generating capture probes on a substrate for identifying the location of analytes in a biological sample.