材料合成生物学新突破！柏垠生物创始人钟超团队打造“可编程”生物纤维素平台

Core Viewpoint - The article discusses a novel "bio-orthogonal functionalization" platform developed by a research team from the Shenzhen Institute of Advanced Technology, which allows for the modular integration of various bioactive functions into bacterial cellulose (BC), transforming it from a static material into a programmable platform for diverse applications in regenerative medicine, biosensing, and environmental remediation [2][5][14]. Group 1: Platform Development - The research team has successfully constructed a universal platform that combines metabolic glycoengineering and click chemistry, enabling the transformation of BC into a programmable "active base" for multi-functional integration [2][5]. - This platform allows researchers to covalently "install" functional molecules of different scales, from small drug molecules to large protein enzymes, into the cellulose network, thus customizing the material's bioactivity [5][11]. Group 2: Functionalization Strategy - The team proposed a two-step biomimetic strategy: first, "material encoding" during the synthesis phase by incorporating non-natural sugar molecules with chemical handles into the cellulose framework, and second, "click assembly" during the application phase to modularly attach various functional molecules [6][10]. - The core advantage of this strategy is its "bio-orthogonality," which ensures that the introduced azide groups remain stable during fermentation and do not interfere with biological systems, while the subsequent click reactions are mild enough to preserve the activity of functional molecules [10][11]. Group 3: Functional Validation - The platform has been validated by integrating various functional materials, including: - Small molecule antibacterial agents that provide light-responsive antibacterial capabilities [11]. - Cell adhesion peptides that significantly enhance fibroblast adhesion, spreading, and proliferation, transforming the material into a "cell-friendly base" for tissue repair [11]. - Large protein integration, achieving stable functional output and biocatalytic ability through innovative light-catalyzed alkyne modification strategies [11][12]. Group 4: Application Scenarios - The platform's capability to address complex biomedical issues is exemplified by its application in diabetic chronic wounds, where therapeutic enzymes were co-assembled on a single BC dressing to create a "micro metabolic regulator" [12][13]. - The dual-enzyme functionalized dressing demonstrated superior wound closure rates and tissue regeneration compared to traditional materials in diabetic mouse models, showcasing the platform's potential for modular integration and synergistic output [13]. Group 5: Future Prospects - The research establishes a highly versatile and modular BC-based biomaterial functionalization platform, merging programmable design with precise synthesis, allowing for both the empowerment of key functions and the expansion of multi-functional modules [14]. - Future applications may extend beyond biomedical materials to include diverse functional modules such as sensing molecules, catalytic enzymes, and conductive polymers, potentially leading to new technological pathways in biosensing, green catalysis, flexible electronics, and environmental remediation [14].