Integration of MyD88 inhibitor into mesoporous cerium oxide nanozymes-based targeted delivery platform for enhancing treatment of ulcerative colitis.

Abstract

Excessive reactive oxygen species (ROS) and stressed inflammatory response are major characteristics of ulcerative colitis, which cause disease progression and aggravation. Herein, a novel mesoporous cerium oxide nanozymes (MCN) was designed and then loaded with Myeloid differentiation factor-88 (MyD88) inhibitor for synergistic treatment of colitis by scavenging ROS and regulating inflammation. This innovative MCN with average particle size of 200.7 nm, specific surface area of 119.78 m2/g and mesopores of 4.47 nm not only exhibited excellent SOD-like and CAT-like activities to scavenge ROS but also could act as a carrier to load MyD88 inhibitor, TJ-M2010-5, (abbreviated as TJ-5) into their mesopores, achieving the effect of 'two birds with one stone'. Besides, the modification of dextran sulfate sodium (TJ-5/MCN/DSS) increased the internalization of nanozymes into activated macrophages and enhanced in vitro anti-inflammatory ability. To enhance colon targeting, we coated TJ-5/MCN/DSS with the enteric material Eudragit S100, preventing premature release or absorption of the drug in the gastrointestinal tract after oral administration. The results demonstrated that TJ-5/MCN/DSS/Eudragit not only achieved delayed drug release and improved colon targeting but also exhibited optimal therapeutic efficacy in colitis mice. Mechanistically, the MCN-mediated ROS scavenging and TJ-5-mediated MyD88 blockade synergistically inhibited the NF-κB signaling pathway, thereby reducing the inflammatory response. Importantly, TJ-5/MCN/DSS/Eudragit did not induce systemic toxicity. In conclusion, our work not only presents a novel carrier capable of scavenging ROS but also provides proof of concept for the synergistic treatment of colitis using this carrier in combination with MyD88 inhibitors. This study proposes a safe and efficient strategy for targeting ROS-associated inflammation.

• Authors: Hongbing Liu, Muse Ji, Yuti Bi, Peifu Xiao, Jiansong Zhao, Jingxin Gou, Tian Yin, Haibing He, Huaiwei Ding, Xing Tang, Yu Zhang
• Journal: Journal of controlled release : official journal of the Controlled Release Society (J Control Release) Vol. 361 Pg. 493-509 (09 2023) ISSN: 1873-4995 [Electronic] Netherlands
• PMID: 37572964 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
• Copyright: Copyright © 2023. Published by Elsevier B.V.

Chemical References

• ceric oxide
• Dextran Sulfate
• methylmethacrylate-methacrylic acid copolymer
• Myeloid Differentiation Factor 88
• NF-kappa B
• Reactive Oxygen Species

Topics

• Animals
• Mice
• Colitis, Ulcerative (drug therapy)
• Colon
• Dextran Sulfate (pharmacology, therapeutic use)
• Disease Models, Animal
• Inflammation
• Myeloid Differentiation Factor 88 (metabolism, pharmacology)
• NF-kappa B (metabolism)
• Reactive Oxygen Species (metabolism)