Transgenic C. elegans Dnmt3a Overexpression for DNA Methylation Studies

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Solution Overview

Problem

Current methods lack an effective animal model for studying the regulation mechanisms and pathological roles of DNA methylation, particularly in cancer, due to the rarity of DNA methylation in invertebrate animal models like Caenorhabditis elegans.

Innovation Solution

Transgenic Caenorhabditis elegans overexpressing DNA methyltransferase 3a (Dnmt3a) is created by constructing a recombinant vector containing the Dnmt3a gene, injecting it into C. elegans, and irradiating with UV rays to establish stable transformation, allowing for the study of DNA methylation-related diseases, including cancer.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If transgenic C. elegans overexpressing Dnmt3a is constructed, then the ability to study DNA methylation mechanisms and disease roles is improved, but the complexity of the manufacturing process increases

Engineering Contradiction:

Improveability to study DNA methylation mechanismsVSAvoidcomplexity of constructing transgenic model

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The construction process is divided into distinct segments: (a) constructing recombinant vector containing Dnmt3a gene, (b) injecting vector into C. elegans, and (c) UV irradiation to establish stable transformation. This segmentation makes the complex process more manageable and systematic.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The Dnmt3a gene is pre-inserted into a recombinant vector with appropriate promoter and regulatory elements before injection into C. elegans. This preliminary preparation ensures proper expression and reduces experimental complexity during the actual transformation process.

Inventive Principle:

Principle #10Preliminary action

2Adaptability or versatility

If DNA methylation is introduced into C. elegans system, then the model's applicability to cancer research is improved, but the natural biological characteristics of C. elegans are altered

Engineering Contradiction:

Improveapplicability to cancer researchVSAvoidnatural biological characteristics

Core Design Contradiction:

Adaptability or versatilityVSStability of the object's composition

Solution Approach 1:

DNA methylation is introduced specifically through overexpression of Dnmt3a enzyme in C. elegans, creating a localized epigenetic modification rather than changing the entire biological system. This allows studying methylation effects while maintaining most natural characteristics intact.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The invention changes the epigenetic parameter (DNA methylation status) by introducing Dnmt3a, while keeping the genetic and physiological parameters of C. elegans relatively unchanged. This selective parameter modification enables cancer research applicability without completely altering the organism's natural state.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS9681648B2Method for manufacturing transgenic caenorhabditis elegans with DNA methyltransferase and use thereof

Publication Date: 2017.06.20 POSTECH ACADEMY INDUSTRY FOUNDATION

AI summary

Provided are transgenic Caenorhabditis elegans (C. elegans) overexpressing DNA methyltransferase 3a (Dnmt3a) and a method of producing the same. According to the method, a specific mechanism and related factors for DNA methylation mediated by Dnmt3a may be found, and a critical gene for regulating the life span of C. elegans may be identified, and therefore C. elegans may be used as an animal model for screening a drug for a DNA methylation-related disease.