Conditional Knock-Out Mouse Model for Obesity Research
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Solution Overview
Problem
Current gene-targeting strategies for obesity research, such as constitutive knock-out mice, face limitations including early embryonic lethality and undesirable effects that complicate the study of obesity and its comorbidities like diabetes and fatty liver, as they affect all cells and tissues uniformly.
Innovation Solution
A conditional knock-out mouse model is developed where specific cells or tissues can selectively disrupt the MO-1 gene expression using a Cre/loxP system, allowing for tissue-specific and time-controlled gene inactivation, enabling targeted studies of obesity and related disorders without the confounding effects of universal gene knock-out.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If constitutive knock-out mice are used to study obesity, then the molecular basis of obesity can be investigated, but early embryonic lethality and undesirable effects occur that complicate the study
Solution Approach 1:
The invention divides the gene knock-out effect into tissue-specific segments using the Cre/loxP system. The MO-1 gene is disrupted only in specific tissues (adipose tissue, liver, muscle) rather than systemically, allowing researchers to study obesity mechanisms in specific metabolic tissues without causing embryonic lethality or confounding systemic effects.
Solution Approach 2:
The invention applies local quality by creating conditional knock-out mice where the MO-1 gene is selectively disrupted in specific tissues with different metabolic functions. This allows the study of tissue-specific roles of MO-1 in energy homeostasis, lipid metabolism, and glucose regulation without the harmful effects of universal gene disruption.
2Loss of information
If universal gene knock-out is performed, then comprehensive insights into obesity can be obtained, but confounding effects from affecting all cells and tissues uniformly occur
Solution Approach 1:
The invention segments the gene disruption to affect only specific metabolic tissues (adipose tissue, liver, muscle) through tissue-specific Cre recombinase expression. This segmentation allows comprehensive study of obesity mechanisms in relevant tissues while avoiding confounding effects from disruption in non-relevant tissues or developmental stages.
Solution Approach 2:
The invention uses the Cre/loxP system as an intermediary mechanism to control gene disruption. The loxP sites are inserted into the MO-1 gene, and tissue-specific Cre recombinase acts as the mediator to excise the gene sequence only in specific tissues, thereby preventing confounding effects while preserving the ability to study obesity mechanisms.
3Measurement precision
If MO-1 gene is disrupted in all cells, then the role of MO-1 in energy homeostasis can be studied, but early embryonic lethality occurs
Solution Approach 1:
The invention performs preliminary action by inserting loxP sites into the MO-1 gene in advance, creating a conditional knock-out mouse that survives normal development. The actual gene disruption is then activated later in specific tissues using Cre recombinase, allowing the animal to reach adulthood and be studied for its role in energy homeostasis without embryonic lethality.
Solution Approach 2:
The invention applies dynamics by making the gene disruption reversible and controllable in time and space. The MO-1 gene remains intact during development and can be selectively disrupted in specific tissues at specific times using Cre recombinase, allowing the study of MO-1's dynamic role in energy homeostasis throughout the animal's life.
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 mice with obesity and related phenotypes that can be used to study the molecular basis of obesity and metabolic syndrome in a controlled manner, providing insights into energy homeostasis and fatty liver development, and facilitating the screening of therapeutic agents for obesity and related disorders.
Implementation Method 1
A conditional knock-out mouse model is developed where specific cells or tissues can selectively disrupt the MO-1 gene expression using a Cre/loxP system
Data Source
AI summary
A conditional knock-out non-human animal is disclosed. Wherein some cells of the non-human animal but not all the cells comprise a disrupted MO-1 nucleic acid sequence, wherein the disruption results in an inability of the non-human animal to produce detectable levels of the MO-1 protein, as assayed by Southern blot analysis.