Stem Cell Organoid Production Using Hydrogel Encapsulation
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Solution Overview
Problem
Existing methods for producing organoids require shaping suspended cells into a specific form, are labor-intensive, and lack automation, limiting the production of large numbers of organoids.
Innovation Solution
An in vitro process involving cultivation of pluripotent stem cells in a stirred tank bioreactor without differentiation factors, forming aggregates, encapsulating them in biocompatible hydrogel, and differentiating under static conditions using a controlled medium regimen, eliminating the need for cell shaping and enabling automation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If cells are shaped by depositing and centrifuging in U-bottom vessels, then cell aggregation is achieved, but the process requires manual intervention and cannot be automated
Solution Approach 1:
The invention extracts and eliminates the cell shaping step entirely from the process. Instead of using U-bottom vessels and centrifugation to form cell aggregates, the patent directly suspends cells in hydrogel solution which naturally forms uniform aggregates during incubation, thereby enabling full automation without complex shaping equipment
Solution Approach 2:
The patent replaces the mechanical cell shaping system (centrifugation and manual deposition) with a chemical/biological system where cells self-assemble in hydrogel solution. This substitution eliminates the need for complex mechanical equipment and enables automation through simple suspension and incubation steps
2Productivity
If multiple processing steps are used to produce organoids, then cell differentiation control is achieved, but production efficiency decreases
Solution Approach 1:
The invention merges multiple separate processing steps into a single integrated step. Cell aggregation and hydrogel encapsulation are combined into one simultaneous process where cells are suspended in hydrogel solution and incubated together, eliminating sequential操作步骤 and significantly improving production efficiency
Solution Approach 2:
The patent performs preliminary preparation of hydrogel solution with suspended cells before the actual organoid formation. This pre-mixing approach allows all necessary components to be ready in advance, eliminating the need for multiple subsequent manipulation steps and reducing overall processing time
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 process allows for the efficient production of a large number of organoids with controlled differentiation, reducing processing steps and enabling automated control, while maintaining cell viability and functionality.
Implementation Method 1
cultivating pluripotent stem cells (PSC) in cell culture medium, for 2 to 3 days, with agitation of the medium, preferably providing the agitation in a stirred tank bioreactor
Implementation Method 2
encapsulating PSC aggregates separately in biocompatible hydrogel to produce separate hydrogel-encapsulated PSC aggregates
Data Source
AI summary
In vitro process for producing organoids from mammalian cells, the process comprising or the steps of cultivating pluripotent stem cells (PSC) in cell culture medium in a stirred tank bioreactor under conditions suitable for producing PSC aggregates, removing PSC aggregates suspended in cell culture medium from the bioreactor, and preferably in a flow channel, encapsulating PSC aggregates separately in biocompatible hydrogel to produce separate hydrogel-encapsulated PSC aggregates, incubating the hydro-gel-encapsulated PSC aggregates in cultivation vessels under static conditions in medium containing at least one differentiation factor.