NIR triggered photocatalytic and photothermal bifunctional MOF nanozyme using for improving osteoarthritis microenvironment by repairing injured chondrocytes of mitochondria

骨关节炎 软骨细胞 化学 软骨 线粒体 细胞生物学 活性氧 自噬 细胞凋亡 生物物理学 癌症研究 医学 生物化学 病理 生物 解剖 替代医学
作者
Shibo Xu,Yiyi Lin,Xingjun Zhao,Zepeng Liang,Yanan Hu,Zhenhua Chen,Xiuli Ren,Xifan Mei
出处
期刊:Chemical Engineering Journal [Elsevier]
卷期号:468: 143826-143826 被引量:10
标识
DOI:10.1016/j.cej.2023.143826
摘要

Osteoarthritis (OA) is one of the leading causes of chronic disability in the elderly. Effective clinical interventions for OA are still lacking, and new therapeutic measures are urgently needed. The emerging near-infrared light (NIR) sensitive nanozymes are attractive for their great potential and appeal in treating OA by repairing mitochondrial function and improving impaired autophagic flux. In this study, a NIR-sensitive tea polyphenol-modified zirconium-based porphyrin metal–organic framework (TP-Au@PCN) was introduced as a multifunctional nanoplatform for the treatment of OA. TEM and EDS mapping revealed that gold nanoclusters were uniformly distributed on the surface of the spherical particles. Electron spin resonance (ESR) analysis revealed that nanozymes could alleviate different types of oxidative stress. Molecular biology indicated that TP-Au@PCN reduced chondrocyte apoptosis and increased chondrocyte metabolism by 80.7%. An increase in chondrocyte-expressed type II collagen and proteoglycan content ensues. Injection of TP-Au@PCN effectively raised the joint temperature to 46.9 °C and controlled drug delivery under NIR excitation. Section staining revealed that eight weeks of intervention decreased the OARSI score in OA rats by approximately 67.0%. Transmission electron microscopy confirmed a significant improvement in intracellular mitochondrial morphology. The present study provides evidence that modifiable multifunctional nanozymes effectively repair cartilage-damaged mitochondria and promote cartilage regeneration, representing an appealing therapeutic strategy for OA.
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