N-Acyl-X-Glutamine Dipeptides Stabilize Glutamine in Cell Culture Media
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Solution Overview
Problem
Biotechnological cell culture media face challenges in maintaining stability and efficiency, particularly with glutamine, which degrades under heat sterilization, leading to nutritional deficiencies and suboptimal product formation in animal cell cultures.
Innovation Solution
A cell culture medium comprising a defined molar ratio of N-acylated dipeptides and free or dipeptide forms of L-glutamine, where the ratio of N-acylated dipeptides to other glutamine sources is between 0.03 and 20, stabilizing glutamine delivery and enhancing productivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If glutamine is added to cell culture media to provide essential nutrients, then cell growth and productivity are improved, but glutamine degrades under heat sterilization forming pyroglutamate and ammonia
Solution Approach 1:
The patent uses N-acyl-X-glutamine dipeptides as intermediary compounds that protect glutamine from degradation during heat sterilization. These dipeptides serve as stable carriers of glutamine, delivering it to cells without forming harmful degradation products like pyroglutamate and ammonia that result from direct glutamine heat exposure
Solution Approach 2:
The patent modifies the chemical structure of glutamine by N-acylation to create dipeptide derivatives (Acyl-X-Q) that are resistant to heat-induced degradation. This structural parameter change transforms glutamine from a heat-labile compound into a heat-stable form that can withstand sterilization conditions while maintaining nutritional functionality
2Productivity
If serum is used to supplement culture media with complex nutrients, then cell growth requirements are met, but regulatory and safety concerns arise along with heterogeneity problems
Solution Approach 1:
The patent transitions from complex, variable serum-based media to a defined, synthetic media composition with precise control over nutrient parameters. The specific molar ratio of N-acyl-X-glutamine dipeptides to other glutamine sources (0.03 to 20) creates a reproducible, consistent formulation that eliminates serum-related heterogeneity while meeting all cellular nutritional requirements
3Productivity
If glutamine is used instead of glutamate to provide essential amino acids, then cell nutritional needs are better met, but heat sterilization causes decomposition forming unwanted substances
Solution Approach 1:
The patent introduces N-acyl-X-glutamine dipeptides as intermediary compounds that prevent the direct thermal decomposition of glutamine. These dipeptides act as protected carriers, delivering glutamine nitrogen to cells without exposing free glutamine to heat conditions that would generate pyroglutamate and ammonia
Solution Approach 2:
The patent converts the inherent heat-instability of glutamine into a beneficial feature by using this property to drive the development of acylated dipeptide derivatives. The very susceptibility of glutamine to heat degradation that causes problems is transformed into the motivation for creating heat-stable dipeptide forms that eliminate harmful degradation products
Data Source
AI summary
Disclosed herein is a cell culture media containing L-glutamine from a set of N-acylated dipeptides Acyl-X-Q, and L-glutamine from a set of other glutamine-sources Qsource in a defined molar ratio R=n(Acyl-X-Q)/n(Qsource), wherein the variables X, Q, Acyl, R, n(Acyl-X-Q) and n(Qsource) are defined in the general disclosure. Processes of using the cell culture media are also described herein.