SmartFlare Probe Lipofection Platelet RNA Tagging
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Solution Overview
Problem
Current methods for RNA tagging and analysis, such as the SmartFlare™ method, are inefficient for platelets and cells with short half-lives due to low transfection efficiency and morphological alterations, making it difficult to maintain these cells in culture for extended periods required for RNA detection.
Innovation Solution
A method involving incubation of platelets with a lipofection reagent and SmartFlare™ probes for 10 minutes to 3 hours at 20 °C to 37 °C, followed by fixation, which uses specific lipofection reagents like TransIT-LT1, GeneJuice, NanoJuice, and Turbofect to efficiently introduce SmartFlare™ probes for mRNA or miRNA detection without causing significant morphological changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the SmartFlare™ method is used for RNA tagging in platelets, then RNA detection is enabled, but transfection efficiency is very low (about 9%) and morphological alterations occur
Solution Approach 1:
The patent changes the incubation time parameter from the conventional 16 hours to a reduced timeframe of 30 minutes to 2 hours, and adjusts the temperature parameter to 20-37°C. These parameter modifications enable efficient RNA tagging in platelets while preserving cell integrity and avoiding morphological alterations that occur with traditional methods
Solution Approach 2:
The patent introduces a lipofection reagent as an intermediary substance to facilitate the delivery of SmartFlare™ probes into platelets. This intermediary enables efficient transfection by mediating the interaction between the probe and the platelet membrane, overcoming the low transfection efficiency of direct probe addition
2Duration of action of stationary object
If platelets are maintained in culture for extended periods to allow RNA detection, then RNA tagging can be performed, but platelets cannot be maintained due to their short half-life
Solution Approach 1:
The patent performs preliminary action by pre-complexing the SmartFlare™ probe with the lipofection reagent before adding it to the platelets. This pre-preparation enables rapid and efficient probe delivery during the brief window when platelets remain viable, eliminating the need for extended culture maintenance
Solution Approach 2:
The patent rushes through the transfection process by reducing the incubation time to 30 minutes to 2 hours, completing the RNA tagging operation within the short half-life window of platelets. This accelerated approach skips the extended culture period required by traditional methods, enabling successful tagging before cell degradation occurs
3Ease of manufacture
If conventional transfection methods are used to introduce RNA probes into platelets, then RNA tagging is attempted, but the transfection efficiency remains very low (about 9%)
Solution Approach 1:
The patent modifies the transfection parameters by using lipofection reagents and adjusting incubation conditions (30 minutes to 2 hours at 20-37°C), which dramatically improves transfection efficiency from 9% to significantly higher levels, making RNA tagging in platelets practically feasible
Solution Approach 2:
The lipofection reagent serves as an intermediary that facilitates efficient probe entry into platelets by interacting with the cell membrane and enabling probe delivery. This intermediary mechanism overcomes the inefficiency of conventional direct transfection methods
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
This method achieves high transfection efficiency and maintains platelet integrity, allowing for effective RNA tagging and analysis of mRNA and miRNA species, particularly for platelets and cells with short half-lives, overcoming previous limitations.
Implementation Method 1
Incubating said platelets for a time of 10 minutes to 3 hours, or 30 minutes to 2 hours, at a temperature from about 20 °C to about 37 °C, in a culture medium supplemented with a lipofection reagent and a SmartFlareTM probe of interest
Implementation Method 2
The SmartFlareTM probe is added to the culture and allowed to incubate for a period of about 16 hours, so as to allow it to enter the cells via endocytosis
Implementation Method 3
Once inside the cell, the probe, recognizing a specific target, binds thereto and a subsequent fluorescence analysis reveals the presence thereof
Implementation Method 4
Fixing with a fixative
Implementation Method 5
a subsequent fluorescence analysis reveals the presence thereof
Data Source
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AI summary
The present invention relates to a method for RNA tagging and analysis on single cell, suitable for platelets and cells with a short half-life, comprising the following steps: a) Providing a population of cells of interest; b) Incubating said cells for a time of 10 minutes to 3 hours, or 30 minutes to 2 hours, at a temperature from about 20 °C to about 37 °C, in a culture medium supplemented with a lipofection reagent and a SmartFlare™ probe of interest; c) Fixing with a fixative; d) Visualising and analysing the RNA of interest.