LDL Receptor Knockout Hamster Model for Hyperlipidemia Research
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Solution Overview
Problem
Current animal models, such as LDL-R and ApoE knockout mice, have lipid metabolism and drug sensitivity differences from humans, limiting their clinical applicability in studying hypercholesterolemia and cardiovascular diseases, particularly for coronary artery and cerebral artery diseases.
Innovation Solution
Development of LDL receptor gene knockout hamsters using CRISPR/CAS9 gene editing technology to create genetically engineered models with elevated blood lipid levels, mimicking human familial hypercholesterolemia, allowing for more accurate drug screening and disease research.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If LDL-R and ApoE knockout mice are used as animal models, then atherosclerotic lesions can be studied, but the lipid metabolism and drug sensitivity differ from humans, limiting clinical applicability
Solution Approach 1:
The patent creates hamster models that copy human lipid metabolism characteristics rather than using mouse models. The hamsters are genetically engineered to have human-like lipid profiles, including high LDL cholesterol levels and similar responses to cholesterol-lowering drugs, making them a more accurate biological copy of human hypercholesterolemia patients.
Solution Approach 2:
The patent changes the species parameter from mouse to hamster, which fundamentally alters the lipid metabolism parameters. Hamsters naturally exhibit human-like lipid metabolism patterns, including higher LDL cholesterol levels and different drug responses, thereby resolving the species difference issue that limited clinical applicability in mouse models.
2Productivity
If mouse models are used for atherosclerosis research, then rapid reproduction and low cost are advantages, but atherosclerotic lesions occur mostly in aorta and outflow tract with minimal involvement of coronary and cerebral arteries
Solution Approach 1:
The hamster model copies the human pattern of atherosclerosis distribution, with lesions forming in coronary and cerebral arteries similar to human patients. This biological copying of disease distribution patterns allows the model to reliably study cardio-cerebral vascular complications while maintaining the productivity advantages of small animal models.
3Stability of the object's composition
If conventional animal models are used, then existing knowledge can be built upon, but the models cannot simulate the natural pathogenesis of human coronary heart disease and stroke
Solution Approach 1:
The patent changes fundamental biological parameters of the animal model by switching from mouse to hamster species, which have naturally human-like lipid metabolism and atherosclerosis progression patterns. This parameter change enables the model to simulate human disease pathogenesis while maintaining consistency with existing atherosclerosis research frameworks.
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 LDL receptor gene knockout hamsters exhibit significantly elevated cholesterol levels similar to human patients, enabling more relevant studies on hyperlipidemia and atherosclerosis, and show responsiveness to cholesterol-lowering drugs like ezetimibe, providing a superior animal model for cardiovascular disease research.
Implementation Method 1
the LDL receptor gene is knocked out by CRISPR/CAS9 gene editing technology
Data Source
AI summary
Provided is a method for preparing a genetically-engineered hamster comprising in vivo knocking out an LDL receptor gene in the hamster. The LDL receptor gene is knocked out by CRISPR/CAS9 gene editing technique. The genetically-engineered hamster shows significantly high levels of blood lipids, and it thus well-suited for direct use in hyperlipidemia and arteriosclerosis studies, and is a small animal model with high similarities to human familial hypercholesterolemia. Also provided is a method for screening drugs using the genetically-engineered hamster.