Fluorescent Tracers for Real-Time Thiol Detection in Stem Cell Organelles
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Solution Overview
Problem
Current methods for measuring antioxidant activity in stem cells are inefficient, and there is a need for a sensitive and real-time method to detect thiols in cell organelles like mitochondria and Golgi apparatus to screen high-quality stem cells without disrupting the cells.
Innovation Solution
Development of MitoFreSH-tracer and GolgiFreSH-tracer compounds that reversibly and ratiometrically change fluorescence intensity in response to thiol levels, allowing for real-time detection and measurement of thiols in mitochondria and Golgi apparatus, respectively, using coumarin derivatives as fluorescent substances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional methods are used to measure antioxidant activity in stem cells, then measurement can be performed, but the measurement efficiency is low and real-time detection is not achieved
Solution Approach 1:
The patent replaces conventional mechanical/chemical measurement methods with a fluorescence-based optical detection system. The sensor compound emits fluorescence signals that can be detected in real-time, substituting traditional slow and disruptive measurement techniques with a rapid, non-invasive optical method that enables continuous monitoring of antioxidant activity in living stem cells.
Solution Approach 2:
The sensor compound utilizes fluorescence emission (a form of light/color change) to indicate antioxidant activity levels. The fluorescence intensity or wavelength changes in response to thiol-containing compounds, providing a visual and measurable signal that enables real-time detection without disrupting cell function, thereby improving measurement efficiency and enabling continuous monitoring.
2Measurement precision
If conventional thiol detection methods are used, then detection can be performed, but the detection sensitivity is insufficient and cells are disrupted
Solution Approach 1:
The patent introduces a sensor compound as an intermediary substance that mediates between the thiol-containing compounds in stem cells and the detection system. This sensor selectively binds to thiol groups and transduces the binding event into a fluorescence signal, enabling sensitive detection without direct disruption of cell structures. The sensor acts as a bridge that allows indirect observation of intracellular thiols while maintaining cell integrity.
Solution Approach 2:
The patent replaces disruptive mechanical or chemical extraction methods with a fluorescence-based optical detection system. The sensor compound enables detection of thiols within intact living cells through non-invasive fluorescence measurement, eliminating the need to disrupt cell membranes or extract cellular components, thereby maintaining cell viability while achieving high detection sensitivity.
3Quantity of substance
If stem cells are cultured to obtain sufficient quantity, then therapeutically effective amount is achieved, but pluripotency and tissue regeneration ability are lost
Solution Approach 1:
The patent implements a feedback mechanism by enabling real-time monitoring of antioxidant activity (via thiol detection) in cultured stem cells. This continuous feedback on cellular health and metabolic state allows researchers to identify and select high-quality stem cells that maintain pluripotency during culture expansion. By monitoring antioxidant levels, the system provides information to guide culture conditions and cell selection, ensuring that expanded cell populations retain therapeutic quality and regenerative capacity.
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 tracers enable highly sensitive and quantitative detection of thiols in living cells, accurately measuring antioxidant activity and screening for highly active stem cells, thereby improving the efficiency of cell therapeutic agents.
Implementation Method 1
fluorescence methods of effectively detecting thiols in living cells without disrupting the cells have been developed
Data Source
AI summary
The present invention relates to a real-time fluorescence imaging sensor for measuring glutathione in cell organelles and a method for fabricating the same. More specifically, the present invention relates to a novel compound for measuring glutathione in cell organelles, a method for preparing the novel compound, a real-time fluorescence imaging sensor for measuring glutathione in cell organelles, which comprises the novel compound, a method for fabricating the imaging sensor, and a method of measuring glutathione in cell organelles by use of the imaging sensor.When the composition comprising the compound according to the present invention is used, it can measure the antioxidant activity of the organelle mitochondria or Golgi apparatus in living cells, particularly stem cells, and can screen highly active stem cells based on the results obtained by measuring the antioxidant activity of the cell organelle.