iPS Cell Differentiation Prediction via Metabolite Profiling
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Solution Overview
Problem
Current methods for predicting the differentiation efficiency of induced pluripotent stem cells (iPS cells) into chondrocytes or neural crest cells are time-consuming, requiring at least 8 days for differentiation induction into neural crest cells and subsequent measurement of CD271 expression levels.
Innovation Solution
A method involving the collection and quantification of metabolites in culture supernatants from iPS cells, followed by multivariate analysis to construct a prediction model for differentiation efficiency, allowing for the prediction of iPS cell differentiation efficiency into chondrocytes or neural crest cells without the need for extensive differentiation processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If differentiation induction into neural crest cells is performed to measure CD271 expression levels, then differentiation efficiency can be predicted, but the process requires at least 8 days which is time-consuming
Solution Approach 1:
The invention performs preliminary measurement of CD271 expression levels in undifferentiated iPS cells before differentiation induction. By measuring the marker protein expression in the undifferentiated state using flow cytometry, the method predicts future differentiation efficiency without requiring actual differentiation to occur, thus eliminating the 8-day time requirement while maintaining prediction accuracy
Solution Approach 2:
The invention replaces the biological differentiation process (mechanical/cellular transformation taking 8 days) with a direct molecular measurement approach. Instead of inducing differentiation and measuring outcomes, the method directly measures CD271 expression in undifferentiated cells, substituting a lengthy biological process with a rapid analytical measurement
2Measurement precision
If iPS cells are differentiated into chondrocytes and cartilage-related gene expression is measured, then differentiation efficiency can be determined, but the process takes a long period of time
Solution Approach 1:
The invention measures CD271 expression levels in undifferentiated iPS cells as a preliminary indicator of future differentiation capacity. This preliminary measurement correlates with subsequent chondrocyte differentiation efficiency, allowing prediction without completing the full differentiation process into chondrocytes and measuring cartilage gene expression
Solution Approach 2:
The invention extracts and measures the key predictive marker CD271 expression level from the complex differentiation process. By isolating this specific molecular indicator and measuring it in undifferentiated cells, the method extracts the essential predictive information without requiring the entire differentiation pathway to be completed
Data Source
AI summary
A plurality of metabolites contained in culture supernatants of a plurality of iPS cell clones whose differentiation efficiency into chondrocytes or neural crest cells is known is quantified, and a relationship between the measured values of the plurality of metabolites obtained by the quantification and the differentiation efficiencies is subjected to a multivariate analysis, and a model for predicting a differentiation efficiency of iPS cells is constructed. Furthermore, the plurality of metabolites contained in a culture supernatant of a test cell group including a single type of iPS cell clones is quantified, and the values, obtained by the quantification, are applied to the model, thereby predicting a differentiation efficiency of the test cell group into chondrocytes or neural crest cells. This makes it possible to predict the differentiation efficiency of iPS cells into chondrocytes or neural crest cells in a short time.