Ureteric Bud Tip Cell Isolation Using VLDL-R Surface Binding
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Solution Overview
Problem
There is a lack of efficient methods for isolating ureteric bud tip cells, which are crucial for producing ureteric bud tissues and organs for potential therapeutic applications in kidney diseases and transplantation, as well as for creating renal disease models and drug evaluation systems.
Innovation Solution
A method involving the use of a very low density lipoprotein receptor (VLDL-R) binding agent to isolate ureteric bud tip cells, followed by culturing them in specific growth factor and inhibitor-containing media to produce ureteric bud tip cell colonies, organoids, and collecting duct progenitors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional methods are used to isolate ureteric bud tip cells, then the isolation process is complex and time-consuming, but the efficiency and purity of cell isolation are insufficient
Solution Approach 1:
The patent extracts and utilizes the specific surface marker VLDL-R (very low-density lipoprotein receptor) that is uniquely expressed on ureteric bud tip cells. By targeting this specific marker, the method extracts only the desired cell population from the mixed cell population, achieving high-purity isolation without complex multi-step procedures. This is accomplished through immunomagnetic sorting or flow cytometry using anti-VLDL-R antibodies.
Solution Approach 2:
The patent changes the parameter of cell surface marker expression by inducing VLDL-R expression specifically in ureteric bud tip cells through controlled differentiation conditions. By adjusting differentiation parameters (growth factors, culture conditions), the method creates a distinct surface marker profile that enables easy separation of tip cells from other cell types based on VLDL-R positivity.
2Adaptability or versatility
If multiple differentiation steps are used to produce ureteric bud tissues, then cell diversity is achieved, but the production time and process complexity increase
Solution Approach 1:
The patent performs preliminary isolation of pure ureteric bud tip cells using VLDL-R as a marker before differentiation. By starting with highly purified tip cells rather than mixed populations, the subsequent differentiation process proceeds more efficiently and predictably, reducing the time required to generate desired cell types while maintaining the ability to produce diverse cell lineages from the tip cell progenitor population.
Solution Approach 2:
The patent segments the differentiation process into distinct phases: first isolating tip cells based on VLDL-R expression, then directing their differentiation into specific lineages (collecting duct cells, lower urinary tract cells, or kidney organoids). This segmentation allows each phase to be optimized independently, reducing overall production time while achieving diverse cell type output.
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
Enables the efficient isolation and production of ureteric bud tip cells and organoids, facilitating their use in therapeutic applications and renal disease modeling.
Implementation Method 1
contacting the cells, tissue, or organoid comprising the ureteric bud tip cell with a very low density lipoprotein receptor (VLDL-R) binding agent
Data Source
AI summary
Provided is a method for isolating a ureteric bud tip cell from cells, a tissue, or an organoid comprising the ureteric bud tip cell, comprising the following steps of contacting the cells, tissue, or organoid comprising the ureteric bud tip cell with a very low density lipoprotein receptor (VLDL-R) binding agent, and isolating the ureteric bud tip cell using the binding agent as an indicator.