Lgr4 Promoter Control of Gene Expression by Electromagnetic Fields
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Solution Overview
Problem
Existing gene expression regulation methods, including electromagnetic field-responsive promoters, face challenges in achieving sensitive and efficient on-and-off control, particularly in vivo, and are limited by basal levels and responsiveness to electromagnetic fields.
Innovation Solution
The development of the Lgr4 gene promoter and fragments thereof, which exhibit superior responsiveness to electromagnetic fields, enabling precise regulation of gene expression both in vitro and in vivo, with the promoter activity regulated by nucleotides from position 1337 to position 1978 of SEQ ID NO: 1 or SEQ ID NO: 2.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional promoters (CMV, EF1α, PGK, U6) are used to overexpress target genes, then gene expression ability is improved, but in vivo regulation control and organ-specific expression are deteriorated
Solution Approach 1:
The patent employs electromagnetic field-responsive promoters that can dynamically switch between active and inactive states based on EMF exposure. This dynamic control mechanism allows the promoter to transition from constitutive expression to regulated expression, enabling on-and-off control of gene expression in vivo without requiring chemical additives or complex delivery systems.
Solution Approach 2:
The patent utilizes changes in electromagnetic field parameters (presence/absence of EMF) to regulate promoter activity. By altering the physical parameter of electromagnetic field exposure, the promoter's transcriptional activity is modulated, providing a simple and effective means of controlling gene expression levels and timing in living organisms.
2Ease of operation
If chemical-responsive promoters (e.g., doxycycline-activated) are used to regulate gene expression, then in vivo expression control is improved, but delivery difficulty and biological condition responsiveness are deteriorated
Solution Approach 1:
The patent replaces chemical signaling mechanisms with electromagnetic field-based control. Instead of requiring chemical compounds to be delivered and metabolized by the body, the system uses electromagnetic fields that can penetrate tissues and directly activate the promoter through physical interaction with electromagnetic-sensitive elements, eliminating the need for complex chemical delivery and metabolism pathways.
3Ease of operation
If light-responsive gene expression techniques are used, then optical control capability is improved, but in vivo light penetration regulation is deteriorated
Solution Approach 1:
The patent substitutes optical control with electromagnetic field control. By using electromagnetic fields (which include radiofrequency and microwave regions) instead of visible light, the system overcomes the penetration limitations of optical methods in biological tissues. Electromagnetic fields of appropriate frequencies can penetrate deeper into tissues while maintaining the ability to selectively activate the promoter through electromagnetic resonance or absorption mechanisms.
4Reliability
If previously developed electromagnetic field-responsive promoters (Egr1, Ifi44) are used, then EMF responsiveness is improved, but basal levels and responsiveness efficiency are deteriorated
Solution Approach 1:
The patent optimizes the electromagnetic field responsiveness parameters of the promoter by selecting and characterizing specific promoter sequences (including full-length and fragment sequences) that exhibit enhanced sensitivity to EMF. Through parameter optimization of the promoter structure and its electromagnetic interaction characteristics, the system achieves lower basal expression levels and higher responsiveness efficiency compared to previously developed promoters.
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 Lgr4 gene promoter provides significantly enhanced responsiveness to electromagnetic fields, allowing precise on-and-off control of gene expression, effective in various tissues and applicable to a variety of target genes, including cellular reprogramming and gene therapy.
Implementation Method 1
a promoter of Lgr4 gene regulated by electromagnetic fields... a technique for regulating target gene expression using the Egr1 gene promoter or the Ifi44 promoter, both of which are electromagnetic field-responsive promoters
Data Source
AI summary
The present invention relates to an Lgr4 gene promoter regulated by electromagnetic fields or a fragment thereof, a vector comprising the same, a composition for regulating gene expression by electromagnetic fields comprising the vector, or a method for regulating gene expression. The present invention also relates to a vector comprising an Lgr4 gene promoter regulated by electromagnetic fields or a fragment thereof, and a cellular reprogramming gene; a composition for cellular reprogramming comprising the vector; a method for cellular reprogramming; and a method for cell therapy or gene therapy using the vector.