Ciliary Marginal Zone Stem Cell Production via Floating Culture
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
There is a need for an efficient method to produce tissue stem cells with differentiation potency into retinal cells and self-replication ability, particularly for cell transplantation, drug discovery, and tissue regeneration, as existing methods lack high purity and efficiency.
Innovation Solution
A method involving the differentiation of pluripotent stem cells into ciliary marginal zone stem cells, which includes floating culture and the collection of SSEA-1 positive cells, using specific media conditions and growth factors to form retinospheres and retinal layer-specific neurons, enhancing the purity and self-replication capacity of these cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional methods are used to produce retinal stem cells, then cell production can be achieved, but the purity and efficiency are insufficient
Solution Approach 1:
The patent segments the production process into distinct phases: initial differentiation of pluripotent stem cells into retinal tissue, formation of cell aggregates with ciliary marginal zone-like structures, and subsequent floating culture to generate retinospheres. This segmentation allows each phase to be optimized independently, improving both purity and efficiency
Solution Approach 2:
The patent performs preliminary differentiation of pluripotent stem cells into retinal tissue and formation of cell aggregates with ciliary marginal zone-like structures before initiating floating culture. This preliminary action ensures that only cells with the appropriate lineage commitment are subjected to the expansion phase, thereby improving purity while maintaining efficiency
2Reliability
If floating culture is performed to obtain retinospheres, then self-replication ability is enhanced, but differentiation potency may be compromised
Solution Approach 1:
The patent performs preliminary differentiation of pluripotent stem cells into retinal tissue and formation of cell aggregates with ciliary marginal zone-like structures before initiating floating culture. This preliminary action ensures that cells are pre-committed to the retinal lineage, so subsequent expansion maintains differentiation potency while enhancing self-replication
Solution Approach 2:
The patent changes culture parameters by transitioning from adherent culture to floating culture, and from differentiated state to undifferentiated retinosphere state. These parameter changes are controlled to maintain differentiation potential while enhancing self-replication capacity
Data Source
AI summary
The invention provides a method for producing a ciliary marginal zone stem cell induced to differentiate from a pluripotent stem cell, including either the following step (1) or step (2), or both of these steps: (1) a step of floating culturing cells obtained from a cell aggregate containing a ciliary marginal zone-like structure induced to differentiate from pluripotent stem cells, thereby obtaining a retinosphere; and (2) a step of collecting stage specific embryonic antigen-1 positive cells from cells obtained from a cell aggregate containing a ciliary marginal zone-like structure induced to differentiate from pluripotent stem cells.