Annelid Hemoglobin Maintains Stem Cell Undifferentiated State
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Solution Overview
Problem
Stem cells, particularly human stem cells, rapidly differentiate, making them unusable for therapeutic applications and research, as existing methods fail to effectively maintain them in an undifferentiated state for extended periods.
Innovation Solution
The use of extracellular hemoglobin or globin protomers from annelids, which are added to stem cells in a buffer solution, maintains stem cells in an undifferentiated state while preserving their viability, avoiding immunological reactions and the need for antioxidants.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If conventional methods are used to maintain stem cells, then stem cells can be preserved for a short time, but they rapidly differentiate and become unusable for therapeutic applications
Solution Approach 1:
The patent changes the chemical composition parameter of the culture medium by incorporating annelid hemoglobin, which has unique oxygen-binding properties. This parameter change in the medium composition enables extended maintenance of stem cells in the undifferentiated state while preserving their viability, directly resolving the contradiction between duration and reliability.
2Duration of action of stationary object
If stem cells are maintained for extended periods, then they remain available for research and therapy, but they lose their undifferentiated state and become differentiated
Solution Approach 1:
Annelid hemoglobin acts as an intermediary substance in the culture medium that mediates between the stem cells and the differentiation-inducing environment. It provides a protective effect that stabilizes the undifferentiated state of stem cells over extended periods, allowing long-term preservation without differentiation.
3Reliability
If mammalian hemoglobin is used to maintain stem cells, then oxygen supply is improved, but immunological reactions occur and antioxidants are required
Solution Approach 1:
The patent uses annelid hemoglobin, which is naturally free from human immunological recognition markers. This alternative hemoglobin source provides the necessary oxygen supply function without triggering immunological reactions or requiring additional antioxidants, eliminating the harmful factors associated with mammalian hemoglobin use.
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 extracellular hemoglobin from annelids effectively prevents stem cell differentiation, maintaining their viability and undifferentiated state for several days, allowing for controlled differentiation and research applications.
Implementation Method 1
The first category, with 144 to 192 components, groups together the 'functional' polypeptide chains which bear an active site of heme type, and are capable of reversibly binding oxygen
Data Source
AI summary
A method for maintaining stem cells in the undifferentiated state by mixing the stem cells with at least one extracellular hemoglobin, globin or globin protomer from annelids.