Polymer Metal Tags for Multiplexed Mass Cytometry
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Solution Overview
Problem
Current mass cytometry technologies are limited by the availability of reagents for comprehensive analyses, particularly in live-cell barcoding, due to sensitivity issues with certain metal isotopes and limited polymer-metal tag combinations.
Innovation Solution
The development of compositions comprising populations of metal tags, where each metal tag consists of a polymer with metal-chelating groups and specific isotopes, such as 103Rh, cadmium, palladium, and others, to expand the capabilities of mass cytometry for elemental analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional metal isotopes are used for barcoding, then sensitivity is limited, but expanding the number of available barcoding reagents is needed
Solution Approach 1:
The patent changes the physical-chemical parameters of the barcoding reagents by using polymer-metal tag conjugates with high metal loading capacities instead of traditional small molecule chelators. This allows the same polymer backbone to be used with multiple different metal isotopes, thereby expanding the number of available barcoding reagents while maintaining high sensitivity through optimized metal-to-polymer ratios
Solution Approach 2:
The patent employs composite materials by conjugating metal isotopes to polymer chelators, creating hybrid reagents that combine the high binding capacity of polymers with the detectability of metal isotopes. This composite approach enables both high sensitivity and expanded reagent diversity by pairing a limited set of polymers with a broader range of metal isotopes
2Adaptability or versatility
If more metal isotopes are used to expand analyte measurement, then reagent availability increases, but sensitivity limitations persist with certain isotopes
Solution Approach 1:
The patent introduces polymer chelators as intermediary molecules that mediate between the metal isotopes and the detection system. These polymers act as signal amplifiers by concentrating multiple metal tags per molecule, thereby enhancing the sensitivity of detection for metal isotopes that would otherwise provide weak signals, while still allowing measurement of multiple different analytes
3Productivity
If polymer-metal tag combinations are expanded to increase sample multiplexing, then more samples can be analyzed simultaneously, but reagent development complexity increases
Solution Approach 1:
The patent applies universality by designing polymer chelators with standardized structures that can conjugate to multiple different metal isotopes. A single polymer scaffold serves multiple functions by being compatible with various metal tags, thereby enabling sample multiplexing without proportionally increasing reagent development complexity. The universal polymer platform reduces the total number of unique reagents needed compared to traditional one-to-one matching approaches
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
These compositions enhance the ability to analyze multiple samples simultaneously using live-cell barcoding schemes, improving sample-to-sample consistency and expanding the number of analytes that can be measured.
Implementation Method 1
The polymer comprises at least one metal-chelating group
Data Source
AI summary
Provided are novel metal tags, metal-tagged probes and methods of making and using them for barcoding and mass cytometry. Also provided are kits comprising metal-tagged probes.