{"title":"Leveraging Activatable Janus Nanoprobes for NIR-II Imaging and Enzyme-Like Activity in Monitoring Liver Fibrosis","authors":"Zhouyu Yu, Lijia Zou, Ruiqi Liu, Xiaoyan Zhang, Zhen Cheng, Si Chen, Baisong Chang","doi":"10.1002/adtp.202500142","DOIUrl":null,"url":null,"abstract":"<p>Liver fibrosis presents a significant global health challenge due to its potential progression to cirrhosis, liver failure, or hepatocellular carcinoma, highlighting the necessity for precise imaging of fibrosis progression. Here, a straightforward synthesis method is proposed to design bioresponsive nanoprobes capable of achieving high-resolution bioimaging of liver fibrosis. Janus MnO<sub>2</sub>-coated Ag/Ag<sub>2</sub>S nanoparticles modified by polyethylene glycol (denoted as jMAP) can inherit both the activatable properties from Ag/Ag<sub>2</sub>S and MnO<sub>2</sub> components in the pathological microenvironment. Multiple lines of evidence supported that overexpressed levels of reactive oxygen species (ROS) in liver fibrosis efficiently transformed jMAP nanoprobes to Ag<sub>2</sub>S products, activating bright fluorescence in the second near-infrared window (NIR-II, 1000–1700 nm). In addition, the catalase-like and superoxide dismutase-like activities of jMAP probes reduce hypoxia and oxidative stress with a clearance rate of about 73.3% toward ROS, thereby downregulating hypoxia-inducible factor (HIF-1<i>α</i>) and NADPH oxidase-4 (NOX-4) by 49.5% and 47.9%, respectively. Overall, the developed jMAP probes demonstrate impressive diagnostic accuracy, offering transformative prospects for liver fibrosis diagnosis.</p>","PeriodicalId":7284,"journal":{"name":"Advanced Therapeutics","volume":"8 8","pages":""},"PeriodicalIF":2.6000,"publicationDate":"2025-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Advanced Therapeutics","FirstCategoryId":"3","ListUrlMain":"https://advanced.onlinelibrary.wiley.com/doi/10.1002/adtp.202500142","RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"PHARMACOLOGY & PHARMACY","Score":null,"Total":0}
引用次数: 0
Abstract
Liver fibrosis presents a significant global health challenge due to its potential progression to cirrhosis, liver failure, or hepatocellular carcinoma, highlighting the necessity for precise imaging of fibrosis progression. Here, a straightforward synthesis method is proposed to design bioresponsive nanoprobes capable of achieving high-resolution bioimaging of liver fibrosis. Janus MnO2-coated Ag/Ag2S nanoparticles modified by polyethylene glycol (denoted as jMAP) can inherit both the activatable properties from Ag/Ag2S and MnO2 components in the pathological microenvironment. Multiple lines of evidence supported that overexpressed levels of reactive oxygen species (ROS) in liver fibrosis efficiently transformed jMAP nanoprobes to Ag2S products, activating bright fluorescence in the second near-infrared window (NIR-II, 1000–1700 nm). In addition, the catalase-like and superoxide dismutase-like activities of jMAP probes reduce hypoxia and oxidative stress with a clearance rate of about 73.3% toward ROS, thereby downregulating hypoxia-inducible factor (HIF-1α) and NADPH oxidase-4 (NOX-4) by 49.5% and 47.9%, respectively. Overall, the developed jMAP probes demonstrate impressive diagnostic accuracy, offering transformative prospects for liver fibrosis diagnosis.