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Zhang J, Su L, Liu Z, Tang J, Zhang L, Li Z, Zhou D, Sun Z, Xi K, Lu P, Deng G. A responsive hydrogel modulates innate immune cascade fibrosis to promote ocular surface reconstruction after chemical injury. J Control Release 2024; 365:1124-1138. [PMID: 38123070 DOI: 10.1016/j.jconrel.2023.12.025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2023] [Revised: 11/27/2023] [Accepted: 12/16/2023] [Indexed: 12/23/2023]
Abstract
Following an ocular chemical injury, the release of neutrophil extracellular traps (NETs) triggers an innate immune cascade fibrotic effect involving macrophages (Mø), which limits corneal repair. However, the interplay and mechanisms between NETs and macrophages, as well as the coordination between the innate immunity and corneal repair, remain challenging issues. Using a co-culture system, we report that chemical stimulation exacerbates the accumulation of reactive oxygen species (ROS) within the polymorphonuclear neutrophils, leading to NET formation and the activation of M2 macrophages, ultimately inducing pathological fibrosis of the ocular surface through the IL-10/STAT3/TGF-β1/Smad2 axis. Inspired by the locally formed acidic microenvironment mediated by innate acute inflammatory stimulation, we further integrate sericin with oxidized chitosan nanoparticles loaded with black phosphorus quantum dots (BPQDs) using Schiff base chemistry to construct a functional pH-responsive hydrogel. Following corneal injury, the hydrogel selectively releases BPQDs in response to the acidic environment, inhibiting the innate immune cascade fibrosis triggered by the PMN-ROS-NETs. Thus, corneal pathological fibrosis is alleviated and reshaping of the ocular surface takes place. These results represent a refinement of the mechanism of inherent immune effector cell interactions, and provide new research ideas for the construction of nano biomaterials that regulate pathological fibrosis.
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Affiliation(s)
- Jun Zhang
- Changzhou Third People's Hospital, Changzhou Medical Center, Nanjing Medical University, 300 Lanlin North Road, Changzhou, Jiangsu 213000, China; Department of Ophthalmology, The First Affiliated Hospital of Soochow University, 708 Renmin Road, SuZhou, Jiangsu 215000, China.
| | - Lei Su
- Department of Gynaecology and Obstetrics, The Affiliated Suzhou Hospital of Nanjing Medical University, 26 Daoqian Street, SuZhou, Jiangsu 215000, China
| | - Zhinan Liu
- Changzhou Third People's Hospital, Changzhou Medical Center, Nanjing Medical University, 300 Lanlin North Road, Changzhou, Jiangsu 213000, China
| | - Jincheng Tang
- Department of Orthopedic Surgery, Orthopedic Institute, The First Affiliated Hospital of Soochow University, 708 Renmin Road, SuZhou, Jiangsu 215000, China
| | - Lichen Zhang
- Department of Orthopedic Surgery, Orthopedic Institute, The First Affiliated Hospital of Soochow University, 708 Renmin Road, SuZhou, Jiangsu 215000, China
| | - Ziang Li
- Department of Orthopedic Surgery, Orthopedic Institute, The First Affiliated Hospital of Soochow University, 708 Renmin Road, SuZhou, Jiangsu 215000, China
| | - Dong Zhou
- Changzhou Third People's Hospital, Changzhou Medical Center, Nanjing Medical University, 300 Lanlin North Road, Changzhou, Jiangsu 213000, China
| | - Zhuo Sun
- Changzhou Third People's Hospital, Changzhou Medical Center, Nanjing Medical University, 300 Lanlin North Road, Changzhou, Jiangsu 213000, China
| | - Kun Xi
- Department of Orthopedic Surgery, Orthopedic Institute, The First Affiliated Hospital of Soochow University, 708 Renmin Road, SuZhou, Jiangsu 215000, China.
| | - Peirong Lu
- Department of Ophthalmology, The First Affiliated Hospital of Soochow University, 708 Renmin Road, SuZhou, Jiangsu 215000, China.
| | - Guohua Deng
- Changzhou Third People's Hospital, Changzhou Medical Center, Nanjing Medical University, 300 Lanlin North Road, Changzhou, Jiangsu 213000, China.
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