Neural Stem Cell Proliferation via Notch and c-MET Signaling

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Human adult neural stem cells are difficult to culture in large quantities in an undifferentiated state due to their limited ability to proliferate, hindering their use in treating incurable diseases and regenerating organs.

Innovation Solution

Introducing genes that activate the Notch signaling pathway, such as the NICD gene, or the c-MET/HGF signaling pathway into stem cells to enhance their proliferative capacity, allowing for large-scale culture and potential therapeutic applications.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If conventional culture methods are used for human adult neural stem cells, then the culture process is simple, but the cells have limited ability to proliferate and cannot be expanded in large quantities

Engineering Contradiction:

Improveproliferative ability of stem cellsVSAvoidcomplexity of culture method

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent changes the biochemical parameters of the culture system by introducing specific signaling pathway components. Transfection with NICD gene activates Notch signaling pathway, and treatment with HGF ligand activates c-MET/HGF signaling pathway. These parameter changes in cellular signaling directly enhance the proliferative ability of neural stem cells without fundamentally altering the culture methodology.

Inventive Principle:

Principle #35Parameter changes

2Productivity

If genes that activate signaling pathways are introduced into stem cells, then the proliferative ability is significantly increased, but the complexity of the culture method increases

Engineering Contradiction:

Improveproliferative ability of stem cellsVSAvoidease of cell culture

Core Design Contradiction:

ProductivityVSEase of manufacture

Solution Approach 1:

The patent applies preliminary action by transfecting the NICD gene into neural stem cells before culture, which pre-activates the Notch signaling pathway. This preliminary genetic modification enables sustained high-level proliferation throughout the culture process. Alternatively, HGF ligand treatment is applied at the beginning of culture to activate c-MET/HGF signaling, establishing a favorable environment for extensive cell expansion.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent uses signaling pathway components as intermediaries to mediate between the culture system and the stem cells. The NICD protein acts as an intermediary that activates Notch signaling intracellularly, while HGF ligand serves as an intermediary that binds to and activates c-MET receptors on the cell surface. These intermediaries translate external cultural conditions into internal cellular responses that drive proliferation.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Stability of the object's composition

If large-scale culture of neural stem cells is attempted without signaling pathway activation, then the culture process remains simple, but the cells differentiate instead of proliferating

Engineering Contradiction:

Improveundifferentiated state of stem cellsVSAvoidcell expansion capacity

Core Design Contradiction:

Stability of the object's compositionVSProductivity

Solution Approach 1:

The patent applies preliminary anti-action by activating Notch and c-MET/HGF signaling pathways before differentiation can occur. The NICD transfection or HGF treatment establishes a proliferative signaling environment that counteracts the natural tendency of neural stem cells to differentiate during culture. This preemptive activation of pro-proliferation pathways prevents the onset of differentiation programs.

Inventive Principle:

Principle #9Preliminary anti-action

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

Significantly increases the ability of neural stem cells to proliferate, enabling their use as effective cell therapeutic agents for treating cranial nerve diseases and other neurological conditions.

Implementation Method 1

transfecting stem cells with the Notch intracellular domain (NICD) to activate the Notch signaling pathway

Methodology Applied

Scientific EffectNotch signaling pathway activation:

Implementation Method 2

transfecting stem cells with the c-MET gene and treating the transfected stem cells with the HGF ligand protein to activate the c-MET/HGF signaling pathway

Methodology Applied

Scientific Effectc-MET/HGF signaling pathway activation:

Data Source

PatentUS8815581B2Method for proliferating stem cells by activating c-MET/HGF signaling and notch signaling

Publication Date: 2014.08.26 SAMSUNG LIFE PUBLIC WELFARE FOUND

AI summary

The present invention relates to stem cells in which a gene that activates signaling is introduced and to a method for proliferating the stem cells. More specifically, the invention relates to a method of significantly increasing the ability of stem cells to proliferate, either by transfecting stem cells with the Notch intracellular domain (NICD) to activate the Notch signaling pathway, or by transfecting stem cells with the c-MET gene and treating the transfected stem cells with the HGF ligand protein to activate the c-MET/HGF signaling pathway. According to the present invention, as a result of activating the Notch signaling pathway or the c-MET/HGF signaling pathway, stem cells having an excellent ability to proliferate can be produced in large amounts. Particularly, since neural stem cells which have been difficult to culture in vitro can be proliferated in large amounts, thus the neural stem cells will be more useful for the preparation of cell therapeutic agents for treating cranial nerve diseases.