
Technology
Our Technology Pioneering the Future of Biomaterials

Proteins, Enzymes
Nucleic acids
Cells, Tissues
Wouldn't you like to use the biological materials that support the bioindustry more efficiently? As genetic engineering and efficient AI technology advances, the biological materials that support the bioindustry have made great strides in recent years. However, while biomolecules such as enzymes, aptamers, nucleic acids, and cells have excellent functions, their instability limits the environments, applications, and durations in which they can be used. Professor Madoka Takai of the Graduate School of Engineering, University of Tokyo, Technical Advisor, CTO, and co-founder of Gel Coat Biomaterials, has spent many years researching zwitterionic polymers, a biocompatible material. This hydrophilic zwitterionic polymer and a protective layer of water form the biocompatible hydrogel Gel Coat™.
Amoeba Hydrogel Gel Coat™ protects biomolecules

Protected by free water due to zwitterionic sites
Functionality such as immobilization on hydrophobic sites
High biocompatibility
Formation of nano-sized "nanogel"
Precise size control
Characteristics can be controlled
Easy to scale up
No animal-derived ingredients

Super hydrophilic
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Hydrophilicity
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Retains water
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High biocompatibility
Hydrophobic
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Forms a hydrogel
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Functionality such as fixation
Optimal protection of biomolecules



Free mixing
Nanohydrogel complex
Immobilized on carrier
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Simply mix the enzyme with nanogel particles
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Enzymes can be made heat-resistant and activated
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Suppressing aggregation and improving storage stability
Reacting gel with enzymes, nucleic acids, etc. to form complexes
Higher stability and heat resistance
Functionalization such as decomposition resistance and stealth properties
Enzyme-gel complex supported on a carrier
Maintaining activity while improving repeatability
Enables recovery by filtration, sedimentation, etc.
Data for better understanding

Biocompatibility
No change in cell viability 72 hours after cell seeding at 5 mg/mL

Gel Coat™
Addition amount
Compliant with JIS T 0993-1 and ISO 10993 "Biological evaluation of medical devices"
Figure: Cellular activity assessment
(No additives = 100% standard)
Cell activity / %

Stabilization
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Gel Coat™ hydrogel stabilizes biomolecules, including enzymes
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Maintaining activity and promoting reaction

Figure: residual activity change vs retention time at 40°C

Reusability
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Our hydrogel enables reuse of enzymes
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Gel Coat™ technology realizes high productivity of biocatalyst reactions

Enzyme activity
Number of reactions
Figure: Enzyme activity vs repeated reaction time
Our Technology
Biomolecules such as enzymes, aptamers, nucleic acids, and cells possess exceptional functionality; however, their inherent instability limits the environments, applications, and durations in which they can be effectively utilized.
Professor Madoka Takai of the Graduate School of Engineering at the University of Tokyo, who serves as the Technical Advisor, CTO, and Co-founder of Gel Coat Biomaterials, has dedicated years of research to highly biocompatible zwitterionic polymers. These hydrophilic zwitterionic polymers form a biocompatible hydrogel along with a protective hydration layer.
This biocompatible hydrogel enables the long-term stabilization, immobilization, and thermal protection of biomolecules.
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Industrial Application: By stabilizing enzymes used in the production of chemical products, we can increase the frequency of enzyme reuse and significantly reduce production costs.
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Pharmaceutical Application: Protecting drug molecules with our hydrogel can enhance the sustained efficacy of medications within the body.
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Future Application: In the field of biofuel cells—which generate electricity using glucose and oxygen as fuel—using electrodes that combine enzymes with our hydrogel allows for the creation of power-generating devices that can operate stably and long-term in vivo.
Our Core Strengths
Our expertise lies in environmental, chemical, and medical applications built upon a foundation of:
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Polymer Synthesis: Precision polymerization of zwitterionic polymers.
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Interfacial Technology: Bonding zwitterionic polymers to various material surfaces.
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Evaluation Technology: Advanced assessment of biological materials.
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Interdisciplinary Expertise: A fusion of Life Sciences and Bioengineering.
Comparison with Conventional Stabilizers
While there are several existing methods for stabilizing biomolecules, each presents significant challenges:
1. Conventional Surfactant
Surfactants are used to stabilize and extract hydrophobic biomolecules by making them compatible with water. However, there is a constant concern regarding the structural damage or denaturation they may cause to the biomaterials.
2. Conventional Hydrophilic Material
These materials rely primarily on the size exclusion effect to achieve stabilization. Consequently, their ability to stabilize hydrophobic biomolecules is weak. Furthermore, they carry risks such as unintended adsorption with hydrophilic substances, immunogenicity (immune response), and issues related to increased viscosity.
3. Conventional Bio-derived Material
Materials derived from natural sources face hurdles in mass production and scalability. Additionally, there are inherent business risks regarding the consistent storage, transportation, and commercialization of the materials themselves.
Our Technological Superiority
Our technology features a next-generation polymer that combines artificially produced, biomimetic (cell membrane-inspired) super-hydrophilic units with hydrophobic units. By integrating the strengths of the three conventional methods mentioned above, we are able to enhance the functionality of biomolecules and ensure their activity is maintained.
Academic research has proven our super-hydrophilic units are exceptionally effective at stabilizing biomolecules because, unlike other hydrophilic materials, they do not disrupt the natural structure surrounding water molecules.
We have already secured basic patents and have numerous additional patents pending. We are currently facilitating the growth of chemical and pharmaceutical companies by providing exclusive licensing in fields such as machine learning-driven cell culture, enzyme stabilization, biopharmaceutical stabilization, and bio-manufacturing.
To ensure our polymer designs can be adapted to various applications at ultra-high speed, we incorporate the latest machine learning expertise from the University of Tokyo.
Representative Paper and Patents
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Enzyme stability in polymer hydrogel–enzyme hybrid nanocarrier containing phosphorylcholine group, Xuejin Huang, Jincai Li, Yasuyuki Araki, Takehiko Wada, Yan Xu, and Madoka Takai, RSC Advances, 14, 18807-18814, (2024)
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A Modifiable, Spontaneously Formed Polymer Gel with Zwitterionic and N-Hydroxysuccinimide Moieties for an Enzymatic Biofuel Cell, Yixuan Huang, Tsukuru Masuda, and Madoka Takai, ACS Appl. Polym. Mater., 3, 2, 631-639, (2021)
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Patent JP7359998B2, Polymer hydrogel containing zwitterionic groups
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Patent JP6407513B2, Polymers for Surface Modification of Medical Materials
