Hypothermic Stem Cell Cultivation for Viability and Pluripotency
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Solution Overview
Problem
Existing methods for cultivating stem cells in vitro face challenges in maintaining their pluripotent potential and viability, as hypothermic treatments often induce stress leading to differentiation and loss of potency.
Innovation Solution
A method involving hypothermic conditions at defined temperatures (0-15°C) and oxygen levels (up to 21% v/v) for 4 days to 4 weeks enriches stem cells, using a suitable medium, which surprisingly results in 70-100% viable stem cells or their derivatives.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If hypothermic treatment is applied to cultivate stem cells, then cell enrichment is achieved, but cell stress increases and viability decreases
Solution Approach 1:
The patent applies parameter changes by precisely controlling temperature (0-15°C) and oxygen concentration (1-10% v/v) to create optimal hypothermic conditions that enrich stem cells while minimizing stress. This resolves the contradiction by transforming the harmful hypothermic stress into a beneficial selective cultivation environment through parameter optimization.
Solution Approach 2:
The patent creates an inert-like protective environment by maintaining reduced oxygen conditions (1-10% v/v) during hypothermic treatment. This modified atmosphere protects stem cells from oxidative stress while allowing selective enrichment, thereby maintaining viability during the enrichment process.
2Quantity of substance
If hypothermic treatment is applied to cultivate stem cells, then stem cell enrichment is achieved, but differentiation occurs and pluripotent potential is lost
Solution Approach 1:
By optimizing temperature (0-15°C) and oxygen concentration (1-10% v/v) parameters, the patent creates conditions that promote stem cell proliferation while maintaining pluripotent characteristics. The specific parameter range prevents differentiation that would otherwise occur under standard hypothermic conditions.
Solution Approach 2:
The patent employs dynamic control of cultivation conditions, adjusting temperature and oxygen levels based on cultivation stage and cell response. This dynamic approach allows the system to adapt to cell needs, preventing premature differentiation while achieving enrichment over the 4-day to 4-week period.
3Quantity of substance
If hypothermic treatment duration is extended to enrich stem cells, then enrichment efficiency increases, but cell stress accumulates
Solution Approach 1:
The patent optimizes the duration parameter (4 days to 4 weeks) in combination with controlled temperature and oxygen levels. This parameter optimization allows extended cultivation periods necessary for high enrichment efficiency while the controlled hypothermic conditions prevent excessive stress accumulation that would occur with longer exposure to unoptimized conditions.
Solution Approach 2:
The patent employs periodic medium changes and condition adjustments during the extended cultivation period. This periodic intervention refreshes the cultivation environment, removing accumulated metabolic waste and stressors, thereby enabling long-duration enrichment without excessive stress accumulation.
Data Source
AI summary
The invention relates to method for cultivating stem cells in vitro, comprising the following steps: providing a sample comprising stem cells and cultivating the stem cells by subjecting the sample to a treatment for a first period of time. The treatment is carried out under hypothermic conditions having a defined temperature and a defined atmosphere, wherein the temperature does not exceed 15° C. and the atmosphere has an oxygen content not exceeding 21% (v/v). Thereby, the first period of time is 4 days to 4 weeks.