Microbial DHA Phospholipid Production via Carbon Starvation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for producing DHA phospholipids from marine sources face challenges such as unstable supply, uneven quality, and contamination risks, as well as lower value due to fish odor and higher costs, while microorganisms can only produce DHA as a constituent lipid of triglycerides, not phospholipids, limiting their pharmaceutical and functional food value.
Innovation Solution
A method involving culturing a microorganism capable of producing ω3 unsaturated fatty acids, such as labyrinthulean strain 12B, in a normal culture medium with a carbon source and then further culturing it in a medium without a carbon source to increase DHA phospholipid content, achieving higher DHA phospholipid production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If DHA phospholipids are supplied from marine products such as neon flying squid and fish oil, then DHA phospholipid content can be obtained, but supply stability is poor due to variable fish catches and seasonal changes
Solution Approach 1:
The patent copies the natural DHA phospholipid production capability from marine organisms to microorganisms through fermentation technology. By using microorganisms like Schizochytrium and Thraustochytrium that can be cultured in controlled environments, the invention replicates the beneficial DHA phospholipid production without relying on unstable marine sources, thereby ensuring consistent supply while maintaining high DHA phospholipid content
Solution Approach 2:
The patent replaces expensive, hard-to-obtain marine products with inexpensive, easily cultivable microorganisms. The microorganisms can be rapidly grown in fermentation tanks using simple culture media, providing a cost-effective and scalable alternative to harvesting from neon flying squid or fish oil extraction, thus improving both supply stability and economic feasibility
2Quantity of substance
If fish oil is used as a source of DHA phospholipids, then DHA content can be obtained, but product quality decreases due to fish odor and contamination risks
Solution Approach 1:
The patent extracts only the essential functional component (DHA phospholipids) from microorganisms through controlled fermentation and selective harvesting. By using microorganisms as the source and applying specific extraction methods, the invention obtains high-purity DHA phospholipids without co-extracting harmful substances like fish odor compounds or contaminants that would be present in fish oil, thus achieving both high DHA content and superior product quality
Solution Approach 2:
The patent replaces fish oil with microorganisms that can be rapidly cultured and disposed of after single-use fermentation. This disposable approach eliminates the need for complex fish processing and purification steps, automatically avoiding fish odor and contamination issues while maintaining high DHA phospholipid yields
3Ease of manufacture
If microorganisms are used to produce DHA, then production cost can be reduced, but DHA phospholipid content is low because microorganisms only produce DHA as triglyceride constituent
Solution Approach 1:
The patent changes the cultural parameters and physiological state of microorganisms to shift their lipid metabolism from producing triglycerides to producing phospholipids. By optimizing factors such as culture medium composition, aeration conditions, and growth phase timing, the invention stimulates microorganisms to accumulate DHA phospholipids instead of just DHA triglycerides, thereby achieving both cost-effectiveness and high DHA phospholipid content
Solution Approach 2:
The patent performs preliminary actions during the fermentation process by controlling culture conditions to prepare microorganisms for phospholipid accumulation before harvest. This includes pre-culturing phases, nutrient supplementation, and environmental conditioning that prime the microorganisms to produce high levels of DHA phospholipids, ensuring both economical production and high product content
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 method effectively produces a highly value-added phospholipid with increased DHA content, overcoming the limitations of traditional marine-based methods by enhancing DHA phospholipid yield and quality, suitable for pharmaceutical and functional food applications.
Implementation Method 1
a method for producing a phospholipid comprising an ω3 unsaturated fatty acid as a constituent lipid, comprising the steps of: growing a microorganism capable of producing the ω3 unsaturated fatty acid
Data Source
AI summary
Disclosed is a method for producing a DHA phospholipid comprising an ω3 unsaturated fatty acid, particularly DHA, as a constituent lipid by using a microorganism in a simpler manner. Specifically disclosed is a method for producing a phospholipid comprising an ω3 unsaturated fatty acid as a constituent lipid, which comprises the steps of: growing a microorganism capable of producing the ω3 unsaturated fatty acid in a culture medium containing a carbon source; and further culturing the grown microorganism in a culture medium without any carbon source. The method enables to produce a highly value-added phospholipid which comprises an ω3 unsaturated fatty acid as a constituent lipid by using a microorganism capable of producing the ω3 unsaturated fatty acid in a large quantity.