Self-Assembling Soybean Protein Microparticles for Probiotic Gut Protection
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Solution Overview
Problem
Existing encapsulation methods for probiotic bacteria, such as spray-drying and alginate-based microencapsulation, fail to effectively protect bacteria from the harsh conditions of the gastrointestinal tract, leading to high mortality rates and inadequate survival of probiotics.
Innovation Solution
Microparticles composed of a self-assembling solid matrix of soybean protein and a divalent metal cation, which spontaneously form around probiotic bacteria, providing protection during processing, storage, and transit through the gastrointestinal tract.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If spray-drying is used for probiotic preservation, then the process is easy to implement and low cost, but the bacterial mortality rate is high due to simultaneous dehydration and thermal inactivation
Solution Approach 1:
The probiotic bacteria are pre-encapsulated in a protective matrix before exposure to harsh conditions. This preliminary encapsulation action creates a protective barrier that shields the bacteria from thermal and mechanical stress during subsequent processing and from gastric acid in the gastrointestinal tract, thereby reducing mortality while maintaining process simplicity
Solution Approach 2:
The invention uses a composite encapsulation matrix comprising soybean protein and a divalent metal cation (such as calcium). This composite material provides enhanced protective properties compared to single materials, creating a robust shell that protects bacteria during spray-drying and throughout gastrointestinal transit, thus improving bacterial survival without complicating the manufacturing process
2Reliability
If alginate-based microencapsulation is used, then bacteria are protected from acidic environment and bile fluid, but the encapsulation is not always successful and protection is inadequate
Solution Approach 1:
The invention changes the chemical and physical parameters of the encapsulation matrix by using soybean protein combined with divalent metal cations instead of alginate. This parameter change results in a matrix with superior protective properties that more effectively withstands gastric acid and bile fluid, achieving more reliable protection and higher encapsulation success rates
Solution Approach 2:
The divalent metal cation acts as an intermediary that cross-links with soybean protein to form a stable, protective network. This intermediary component enhances the structural integrity and protective capability of the encapsulation matrix, ensuring successful entrapment and protection of probiotic bacteria under harsh gastrointestinal conditions
3Object-affected harmful factors
If carbohydrate-based materials are used for encapsulation, then the materials are safe and biodegradable, but they are not effective in protecting probiotic bacteria from very low pH conditions
Solution Approach 1:
The invention combines soybean protein with divalent metal cations to create a composite encapsulation material that maintains the safety and biodegradability characteristics while dramatically improving protection against low pH conditions. This composite approach overcomes the limitations of carbohydrate-based materials alone
4Reliability
If casein is used for encapsulating probiotics, then good encapsulation efficiency is obtained, but the product is not suitable for individuals with milk protein allergies
Solution Approach 1:
The invention replaces casein (a milk-derived protein) with soybean protein, which is suitable for individuals with milk protein allergies. This substitution maintains encapsulation efficiency while expanding the product's adaptability to include allergic populations, effectively replacing an unsuitable material with a safe alternative that performs equally well
Solution Approach 2:
Soybean protein serves as a universal encapsulation material that functions effectively for probiotic encapsulation while being safe for both allergic and non-allergic individuals. This multi-functional material replaces casein and broadens the applicability of the probiotic product to a wider population
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
Enhances the survival and viability of probiotic bacteria, allowing them to reach the intestine intact, while being suitable for industrial-scale production and safe for individuals with milk protein allergies.
Implementation Method 1
Microparticles composed of a self-assembling solid matrix of soybean protein and a divalent metal cation, which spontaneously form around probiotic bacteria
Implementation Method 2
Microparticles composed of a self-assembling solid matrix of soybean protein and a divalent metal cation, which spontaneously form around probiotic bacteria, providing protection during processing, storage, and transit through the gastrointestinal tract
Data Source
Figure 1
Figure 2(a)~2(b)
Figure 3
AI summary
The invention relates to self-assembling microparticles comprising a solid matrix and probiotic bacteria, wherein the solid matrix comprises soybean protein and a divalent or trivalent metal, and wherein the probiotic bacteria are distributed throughout the solid matrix; said matrix protects said probiotic bacteria during processing, storage, as well as during transit through the gastrointestinal tract, thus prolonging their lifetime and facilitating release into the intestine and improving their probiotic effect. The present invention also relates to the method for obtaining the self-assembling microparticles and to the products and compositions incorporating them.