Easily-injectable shear-thinning hydrogel provides long-lasting submucosal barrier for gastrointestinal endoscopic surgery  

作　　者：Yinxiang Tang Minhui Hu Fuxin Tang Rongkang Huang Hui Wang Dingcai Wu Ping Lan 

机构地区：[1]Materials Science Institute,Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education,School of Chemistry,Sun Yat-sen University,Guangzhou,510275,China [2]Department of Gastrointestinal Endoscopy,Guangdong Provincial Key Laboratory of Colorectal and Pelvic Floor Diseases,The Sixth Affiliated Hospital of Sun Yat-sen University,Guangzhou,510655,China [3]Department of Colorectal Surgery,Guangdong Provincial Key Laboratory of Colorectal and Pelvic Floor Diseases,The Sixth Affiliated Hospital of Sun Yat-sen University,Guangzhou,510655,China [4]Institute of Biomedical Innovation and Laboratory of Regenerative Medicine and Biomaterials,Biomedical Material Conversion and Evaluation Engineering Technology Research Center of Guangdong Province,Guangzhou,510655,China

出　　处：《Bioactive Materials》2022年第9期44-52,共9页生物活性材料（英文）

基　　金：supported by the project of the National Key Research and Development Program of China(2017YFC1308800);the National Natural Science Foundation of China(51925308 and 51872336);the Technical and Innovation Talents of Guangdong Special Support Program(2017TX04C248).

摘　　要：Submucosal injection material has shown protective effect against gastrointestinal injury during endoscopic surgery in clinic.However,the protective ability of existing submucosal injection material is strictly limited by their difficult injectability and short barrier time.Herein,we report a shear-thinning gellan gum hydrogel that simultaneously has easy injectability and long-lasting barrier function,together with good hemostatic property and biocompatibility.Shear-thinning property endows our gellan gum hydrogel with excellent endoscopic injection performance,and the injection pressure of our gellan gum hydrogel is much lower than that of the small molecule solution(50 wt%dextrose)when injected through the endoscopic needle.More importantly,our gellan gum hydrogel shows much stronger barrier retention ability than normal saline and sodium hyaluronate solution in the ex vivo and in vivo models.Furthermore,our epinephrine-containing gellan gum hydrogel has a satisfactory hemostatic effect in the mucosal lesion resection model of pig.These results indicate an appealing application prospect for gellan gum hydrogel utilizing as a submucosal injection material in endoscopic surgery.

关 键 词：SHEAR-THINNING Injectable hydrogel Gellan gum Long-lasting barrier Endoscopic surgery 

分 类 号：R318[医药卫生—生物医学工程] R57[医药卫生—基础医学]