Immortalized Microglia Cell Lines for Neurodegeneration Research
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Solution Overview
Problem
There is a need for controlled microglia cell cultures that can be used as cell models for researchers studying neuroinflammation, neurodegenerative diseases, and brain development, as existing methods are inadequate for long-term studies.
Innovation Solution
A method for immortalizing mouse brain isolated microglia and subsequently knocking out endocannabinoid receptors to create a reliable cell model for studying neurodegenerative diseases, involving steps such as obtaining primary microglial cells, immortalizing them using viral-mediated induction of the large T-antigen, and producing endocannabinoid receptor gene knockout using the CRISPR-Cas system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If primary microglial cells are used for research, then the cells maintain physiological relevance, but the cells cannot be maintained long-term in culture
Solution Approach 1:
The patent applies preliminary action by introducing the SV40 large T-antigen transgene into microglial cells before culture expansion. This genetic modification is performed upfront to enable long-term proliferation, allowing the cells to maintain physiological relevance while overcoming the inherent limitation of primary cell culture lifespan. The transgene integration is established prior to any extensive culturing or experimentation.
Solution Approach 2:
The SV40 large T-antigen serves as an intermediary element that mediates between the conflicting requirements of physiological relevance and long-term culture maintenance. This viral protein acts as a bridge, enabling the cells to bypass senescence mechanisms without fundamentally altering their microglial identity or function, thus allowing both qualities to coexist.
2Duration of action of stationary object
If microglial cells are immortalized using viral vectors, then long-term culture is achieved, but cellular transformation and loss of physiological properties occur
Solution Approach 1:
The patent applies local quality by selectively introducing only the SV40 large T-antigen transgene without co-introducing oncogenic elements. This localized genetic modification targets specifically the proliferation control mechanism (via p53 and Rb pathway inhibition) while leaving other physiological properties intact. The modification is confined to the specific function needed for immortalization without broadly transforming cellular characteristics.
3Measurement precision
If gene knockout is performed to study endocannabinoid receptor function, then specific molecular mechanisms can be investigated, but the complexity of the experimental system increases
Solution Approach 1:
The patent applies segmentation by dividing the research system into distinct functional modules: immortalized microglial cells as the biological platform, CRISPR-Cas9 as the gene editing tool, and specific endocannabinoid receptor targets (CB1, CB2, GPR55). This modular approach allows precise investigation of individual receptor functions while maintaining a standardized cell system, reducing overall experimental complexity through systematic organization.
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
The method generates long-term microglial cell lines that can be used as a reliable model for developing strategies to treat neurodegenerative diseases, providing a controlled environment for studying microglial functions and neuroinflammatory processes.
Implementation Method 1
immortalizing them using viral-mediated induction of the large T-antigen
Implementation Method 2
producing endocannabinoid receptor gene knockout using the CRISPR-Cas system
Data Source
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AI summary
The present invention relates to a method for generation of the immortalized microglia cells with knockout of endocannabinoid receptor gene. The cells are useful model for developing strategies to treat neurodegenerative diseases.