Reflectin Biomolecules Tuning Cell Refractive Index
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Solution Overview
Problem
Current methods for controlling refractive index and optical properties in living biological cells are limited in their ability to achieve tunable and adaptive transparency, which is essential for applications such as camouflage and advanced biological imaging.
Innovation Solution
Incorporation of cephalopod reflectin biomolecules into living cells, allowing for the regulation of refractive index and optical properties through external stimuli, such as ionic strength, aromatic compounds, and acetylcholine, which affect the conformation and aggregation of reflectin proteins, enabling dynamic control of transparency and light scattering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If traditional tissue clearing methods are used to maximize light transmission, then transparency is improved, but the ability to dynamically control and tune optical properties is lost
Solution Approach 1:
The patent introduces dynamic control of optical properties through stimuli-responsive reflectin proteins that can reversibly change their conformation and aggregation state in response to external stimuli such as ionic strength, aromatic compounds, and acetylcholine. This enables living cells to dynamically tune their transparency and light scattering properties, transforming static tissue clearing into an adaptive optical system.
Solution Approach 2:
The patent utilizes changes in physical and chemical parameters (ionic strength, pH, temperature, presence of aromatic compounds) to modulate the optical properties of reflectin proteins. By changing these parameters, the refractive index and light scattering characteristics of cells can be tuned, enabling dynamic control over transparency while maintaining light transmission.
2Adaptability or versatility
If reflectin proteins are introduced to enable dynamic optical control, then adaptability is improved, but cellular structure and function may be compromised
Solution Approach 1:
The patent employs reflectin proteins that self-assemble and self-regulate their conformation in response to physiological stimuli. The proteins automatically adjust their aggregation state based on cellular conditions (ionic strength, pH, metabolite presence), eliminating the need for complex external control systems while maintaining cellular integrity and natural physiological responses.
Solution Approach 2:
The patent utilizes physiological parameter changes (ionic strength, pH, temperature, metabolite concentration) that naturally occur in living cells to control reflectin protein conformation. This approach leverages the cell's own physiological variations to tune optical properties without introducing foreign control mechanisms that could compromise cellular health or function.
3Adaptability or versatility
If reflectin aggregation is increased to enhance light scattering for camouflage, then optical control capability is improved, but light transmission and transparency are reduced
Solution Approach 1:
The patent creates a dynamic system where reflectin proteins can reversibly transition between dispersed and aggregated states in response to external stimuli. This enables the cell to switch between transparent (dispersed state, high light transmission) and opaque/scattering (aggregated state, enhanced camouflage) conditions, providing adaptive optical control that resolves the contradiction between light transmission and scattering capability.
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 approach allows for the creation of cells with tunable optical properties, enabling adaptive transparency and improved imaging capabilities, mimicking the natural adaptive transparency of cephalopods, and facilitating advanced biological studies and applications.
Implementation Method 1
external stimuli, such as ionic strength, aromatic compounds, and acetylcholine, which affect the conformation and aggregation of reflectin proteins
Implementation Method 2
external stimuli, such as ionic strength, aromatic compounds, and acetylcholine, which affect the conformation and aggregation of reflectin proteins
Implementation Method 3
minimizing competing optical processes, such as the absorption of light by biomolecules found in the system of interest and, most importantly, the scattering of incident light due to differences in refractive index
Implementation Method 4
the scattering of incident light due to differences in refractive index along its path
Data Source
AI summary
The description of living biological cells comprising heterologously expressed reflectin biomolecules that can be used to dynamically tune the optical properties of the host cells, as well as of the methods of fabrication thereof, are provided. Methods of regulating optical properties, including local refractive indices, of such cells with external stimuli are also provided.