Academic Journal
NIR-enhanced Pt single atom/g-C3N4 nanozymes as SOD/CAT mimics to rescue ATP energy crisis by regulating oxidative phosphorylation pathway for delaying osteoarthritis progression
| Title: | NIR-enhanced Pt single atom/g-C3N4 nanozymes as SOD/CAT mimics to rescue ATP energy crisis by regulating oxidative phosphorylation pathway for delaying osteoarthritis progression |
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| Authors: | Jianhui Xiang, Xin Yang, Manli Tan, Jianfeng Guo, Yuting Ye, Jiejia Deng, Zhangrui Huang, Hanjie Wang, Wei Su, Jianwen Cheng, Li Zheng, Sijia Liu, Jingping Zhong, Jinmin Zhao |
| Source: | Bioactive Materials, Vol 36, Iss , Pp 1-13 (2024) |
| Publisher Information: | KeAi Communications Co., Ltd., 2024. |
| Publication Year: | 2024 |
| Collection: | LCC:Materials of engineering and construction. Mechanics of materials LCC:Biology (General) |
| Subject Terms: | ATP energy crisis, Osteoarthritis progression, Oxidative phosphorylation pathway, Nanozymes, Materials of engineering and construction. Mechanics of materials, TA401-492, Biology (General), QH301-705.5 |
| More Details: | Osteoarthritis (OA) progresses due to the excessive generation of reactive oxygen and nitrogen species (ROS/RNS) and abnormal ATP energy metabolism related to the oxidative phosphorylation pathway in the mitochondria. Highly active single-atom nanozymes (SAzymes) can help regulate the redox balance and have shown their potential in the treatment of inflammatory diseases. In this study, we innovatively utilised ligand-mediated strategies to chelate Pt4+ with modified g-C3N4 by π–π interaction to prepare g–C3N4–loaded Pt single-atom (Pt SA/C3N4) nanozymes that serve as superoxide dismutase (SOD)/catalase (CAT) mimics to scavenge ROS/RNS and regulate mitochondrial ATP production, ultimately delaying the progression of OA. Pt SA/C3N4 exhibited a high loading of Pt single atoms (2.45 wt%), with an excellent photothermal conversion efficiency (54.71%), resulting in tunable catalytic activities under near-infrared light (NIR) irradiation. Interestingly, the Pt–N6 active centres in Pt SA/C3N4 formed electron capture sites for electron holes, in which g-C3N4 regulated the d-band centre of Pt, and the N-rich sites transferred electrons to Pt, leading to the enhanced adsorption of free radicals and thus higher SOD- and CAT-like activities compared with pure g-C3N4 and g–C3N4–loaded Pt nanoparticles (Pt NPs/C3N4). Based on the use of H2O2-induced chondrocytes to simulate ROS-injured cartilage in vitro and an OA joint model in vivo, the results showed that Pt SA/C3N4 could reduce oxidative stress-induced damage, protect mitochondrial function, inhibit inflammation progression, and rebuild the OA microenvironment, thereby delaying the progression of OA. In particular, under NIR light irradiation, Pt SA/C3N4 could help reverse the oxidative stress-induced joint cartilage damage, bringing it closer to the state of the normal cartilage. Mechanistically, Pt SA/C3N4 regulated the expression of mitochondrial respiratory chain complexes, mainly NDUFV2 of complex 1 and MT-ATP6 of ATP synthase, to reduce ROS/RNS and promote ATP production. This study provides novel insights into the design of artificial nanozymes for treating oxidative stress-induced inflammatory diseases. |
| Document Type: | article |
| File Description: | electronic resource |
| Language: | English |
| ISSN: | 2452-199X |
| Relation: | http://www.sciencedirect.com/science/article/pii/S2452199X2400063X; https://doaj.org/toc/2452-199X |
| DOI: | 10.1016/j.bioactmat.2024.02.018 |
| Access URL: | https://doaj.org/article/857dc020bda448f9b038c92956d508ce |
| Accession Number: | edsdoj.857dc020bda448f9b038c92956d508ce |
| Database: | Directory of Open Access Journals |
| ISSN: | 2452199X |
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| DOI: | 10.1016/j.bioactmat.2024.02.018 |
| Published in: | Bioactive Materials |
| Language: | English |