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A self-fused hydrogel for the treatment of Glottic insufficiency through outstanding durability,extracellular matrix-inducing bioactivity and function preservation

引用

Bioactive Materials 2023年第6期24卷 54-68页

作者： Chen-Yu Zou Juan-Juan Hu Dan Lu Qian-Jin Li Yan-Lin Jiang Rui Wang Hai-Yang Wang Xiong-Xin Lei Jesse Li-Ling Hui Yang Hui-Qi Xie Laboratory of Stem Cell and Tissue Engineering Orthopedic Research InstituteMed-X Center for MaterialsState Key Laboratory of BiotherapyWest China HospitalSichuan UniversityChengduSichuan610041PR China Department of Otolaryngology Head and Neck SurgeryWest China HospitalSichuan UniversityChengduSichuan610041PR China Department of Medical Genetics West China Second HospitalSichuan UniversityChengduSichuan610041PR China

Injection laryngoplasty with biomaterials is an effective technique to treat Glottic insufficiency.However,the inadequate durability,deficient pro-secretion of extracellular matrix(ECM)and poor functional preservation of current biomaterials have yielded an unsatisfactory therapeutic effect.Herein,a self-fusing bioactive hydrogel comprising modified carboxymethyl chitosan and sodium alginate is developed through a dual-crosslinking mechanism(photo-triggered and dynamic covalent bonds).Owing to its characteristic networks,the synergistic effect of the hydrogel for vocal folds(VFs)vibration and phonation is adequately demonstrated.Notably,owing to its inherent bioactivity of polysaccharides,the hydrogel could significantly enhance the secretion of major components(type I/III collagen and elastin)in the lamina propria of the VFs both in vivo and in vitro.In a rabbit model for Glottic insufficiency,the optimized hydrogel(C1A1)has demonstrated a durability far superior to that of the commercially made hyaluronic acid(HA)Gel.More importantly,owing to the ECM-inducing bioactivity,the physiological functions of the VFs treated with the C1A1 hydrogel also outperformed that of the HA Gel,and were similar to those of the normal VFs.Taken together,through a simple-yet-effective strategy,the novel hydrogel has demonstrated outstanding durability,ECM-inducing bioactivity and physiological function preservation,therefore has an appealing clinical value for treating Glottic insufficiency.

关键词： Glottic insufficiency Self-fusion Hydrogel Extracellular matrix Physiological function

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