3D Printed Bioinspired Stents with Photothermal Effects for Malignant Colorectal Obstruction

Cheng Lin; Zhipeng Huang; Qinglong Wang; Wantao Wang; Wenbo Wang; Zhen Wang; Liwu Liu; Yanju Liu; Jinsong Leng

doi:10.34133/2022/9825656

3D Printed Bioinspired Stents with Photothermal Effects for Malignant Colorectal Obstruction

Research (Wash D C). 2022 Jul 1:2022:9825656. doi: 10.34133/2022/9825656. eCollection 2022.

Authors

Cheng Lin¹, Zhipeng Huang², Qinglong Wang³, Wantao Wang³, Wenbo Wang³, Zhen Wang⁴, Liwu Liu⁵, Yanju Liu⁵, Jinsong Leng¹

Affiliations

¹ Centre for Composite Materials and Structures, Harbin Institute of Technology, No. 2 Yikuang Street, Harbin 150001, China.
² Tangdu Hospital of the Air Force Military Medical University, No. 1, Xinsi Road, Xi'an 710038, China.
³ The First Affiliated Hospital of Harbin Medical University, No. 23 Youzheng Street, Nangang District, Harbin 150001, China.
⁴ The Second Affiliated Hospital of Harbin Medical University, No. 246 Xuefu Street, Nangang District, Harbin 150001, China.
⁵ Department of Astronautical Science and Mechanics, Harbin Institute of Technology, No. 92 West Dazhi Street, Harbin 150001, China.

Abstract

Stent placement is an effective palliation therapy for malignant colorectal obstruction. However, recurrent obstruction is a common severe complication caused by tumor ingrowth into the stent lumen. Conventional covered stents play a part in preventing the tumor from growing inward but at the expense of significantly increasing the risk of stent migration. Therefore, there is an urgent demand to develop stents with sustained antitumor and antimigration abilities. Herein, we propose a facile method for fabricating multifunctional bioinspired colorectal stents using 3D printing technology. Inspired by high-adhesion biological structures (gecko feet, tree frog toe pads, and octopus suckers) in nature, different types of bioinspired colorectal stents are designed to reduce migration. After functionalization with graphene oxide (GO), bioinspired colorectal stents show excellent and controllable photothermal performance, which is validated by effective ablation of colon cancer cells in vitro and tumors in vivo. Besides, the bioinspired colorectal stents demonstrate the feasibility of transanal placement and opening of the obstructed colon. More importantly, the facile manufacturing process of multifunctional bioinspired colorectal stents is appealing for mass production. Hence, the developed multifunctional bioinspired colorectal stents exhibit a highly promising potential in clinical applications.