Wet environment-induced adhesion and softening of coenzyme-based polymer elastic patch for treating periodontitis  

作　　者：Ying Qi Chenyu Xu Zhuodan Zhang Qian Zhang Ziyang Xu Xinrui Zhao Yanhong Zhao Chunyan Cui Wenguang Liu 

机构地区：[1]School of Materials Science and Engineering,Tianjin Key Laboratory of Composite and Functional Materials,Tianjin University,Tianjin,300350,China [2]School and Hospital of Stomatology,Department of Orthodontics,Tianjin Medical University,Tianjin,300070,China

出　　处：《Bioactive Materials》2024年第5期259-273,共15页生物活性材料（英文）

基　　金：the support for this work from the National Natural Science Foundation of China(Grant No.52233008,52303201).

摘　　要：Periodontitis,a common chronic inflammatory disease caused by pathogenic bacteria,can be treated with diverse biomaterials by loading drugs,cytokines or proteins.However,these biomaterials often show unsatisfactory therapeutic efficiency due to their poor adhesion,short residence time in the wet and dynamic oral cavity and emerging drug resistance.Here we report a wet-responsive methacrylated gelatin(GelMA)-stabilized co-enzyme polymer poly(α-lipoic acid)(PolyLA)-based elastic patch with water-induced adhesion and softening features.In PolyLA-GelMA,the multiple covalent and hydrogen-bonding crosslinking between PolyLA and GelMA prevent PolyLA depolymerization and slow down the dissociation of PolyLA in water,allowing durable adhesion to oral periodontal tissue and continuous release of LA-based bioactive small molecule in periodontitis wound without resorting external drugs.Compared with the undifferentiated adhesion behavior of traditional adhesives,this wet-responsive patch demonstrates a favorable periodontal pocket insertion ability due to its non-adhesion and rigidity in dry environment.In vitro studies reveal that PolyLA-GelMA patch exhibits satisfactory wet tissue adhesion,antibacterial,blood compatibility and ROS scavenging abilities.In the model of rat periodontitis,the PolyLA-GelMA patch inhibits alveolar bone resorption and accelerates the periodontitis healing by regulating the inflammatory microenvironment.This biomacromolecule-stabilized coenzyme polymer patch provides a new option to promote periodontitis treatment.

关 键 词：Co-enzyme α-Lipoic acid Wet tissue adhesion Elastic patch PERIODONTITIS 

分 类 号：O63[理学—高分子化学]