FOLLOWUS
MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310058, China
wangzk@zju.edu.cn
Published:01 August 2024,
Published Online:26 June 2024,
Received:05 March 2024,
Revised:21 April 2024,
Accepted:24 April 2024
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Feng, W. J.; Wu, Y. H.; Liu, X. Y.; Wang, Z. K. Shear-thinning catechol-modified chitosan hydrogel loaded with silver nanoparticles for endoscopic submucosal dissection. Chinese J. Polym. Sci. 2024, 42, 1147–1155
Wen-Jun Feng, Yan-He Wu, Xiao-Yang Liu, et al. Shear-thinning Catechol-modified Chitosan Hydrogel Loaded with Silver Nanoparticles for Endoscopic Submucosal Dissection. [J]. Chinese Journal of Polymer Science 42(8):1147-1155(2024)
Feng, W. J.; Wu, Y. H.; Liu, X. Y.; Wang, Z. K. Shear-thinning catechol-modified chitosan hydrogel loaded with silver nanoparticles for endoscopic submucosal dissection. Chinese J. Polym. Sci. 2024, 42, 1147–1155 DOI: 10.1007/s10118-024-3146-0.
Wen-Jun Feng, Yan-He Wu, Xiao-Yang Liu, et al. Shear-thinning Catechol-modified Chitosan Hydrogel Loaded with Silver Nanoparticles for Endoscopic Submucosal Dissection. [J]. Chinese Journal of Polymer Science 42(8):1147-1155(2024) DOI: 10.1007/s10118-024-3146-0.
A kind of injectable shear-thinning hydrogel for endoscopic submucosal dissection was developed
which has excellent shear-thinning and self-healing properties. And it can maintain more durable submucosal cushion height than normal saline. Integrated with good antibacterial activity
hemocompatibility and cytocompatibility
the hydrogel demonstrates a superiority in accelerating wound healing after operation.
Shear-thinning hydrogels have emerged for endoscopic submucosal dissection
while wound intervention after surgery has rarely been mentioned. Herein
a catechol-modified chitosan hydrogel with shear-thinning property was developed for simultaneously facilitating endoscopic submucosal dissection and postoperative wound healing. Benefiting from the shear-thinning and self-healing characteristics
the as-prepared hydrogel showed easily endoscopic injectability. It also performed very well as submucosal cushion
which could remain above 70% after injection for 120 min in
ex vivo
porcine large intestine model. In fact
the cushion height of normal saline dramatically decreased to 46% of the initial height at 30 min. Ag nanoparticles encapsulated into the network endowed the hydrogel with almost reached 100% antibacterial effect against
E. coli
and
S. aureus.
The hemolysis ratio of the hydrogel was calculated to be as low as 0.8%. Combined with good hemocompatibility and cytocompatibility
the as-prepared hyd
rogel displayed much higher
in vivo
wound closure and healing efficacy than normal saline. These results demonstrated the superiority of the shear-thinning chitosan hydrogel in facilitating clinical endoscopic submucosal dissection surgery.
Shear-thinning hydrogelEndoscopic mucosal dissectionWound healingCatechol-modified chitosanSilver nanoparticles
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