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Strain-promoted oxidation-controlled cyclo-octyne-1,2-quinone cycloaddition (SPOCQ) is a fast and activatable cross-linking strategy for hydrogel formation. Gelation is induced by oxidation, which is performed both chemically using sodium periodate and enzymatically using mushroom tyrosinase. Due to the fast reaction kinetics, SPOCQ-formed hydrogels can be functionalized in one-pot with an azido-containing moiety using SPAAC cross-linking.
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http://dx.doi.org/10.1002/adma.201404448 | DOI Listing |
Anal Methods
August 2025
Key Laboratory for Molecular Genetic Mechanisms and Intervention Research on High Altitude Disease of Tibet Autonomous Region, and Engineering Research Center of Tibetan Medicine Detection Technology, Ministry of Education, Xianyang, Shaanxi, 712082, China.
Hydrogen sulfide (HS) is a toxic gaseous signaling molecule that plays multiple physiological regulatory roles in both physiological and pathological processes. A novel fluorescent probe, T1, was designed and synthesized for detecting HS in biological systems. Based on the ICT mechanism, thiolysis of the 2,4-dinitrophenyl ether group, used as the fluorescence quenching group, occurred after the addition of HS, releasing the original fluorescent group, and was accompanied by the recovery of the fluorescence signal (emission peak at 615 nm) with a detection limit of 0.
View Article and Find Full Text PDFChem Biomed Imaging
June 2025
State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China.
Drug-induced hepatotoxicity is a long-standing concern of modern medicine. The production of peroxynitrite (ONOO) is proposed as an early sign of the progression of drug-induced hepatotoxicity. However, conventional blood tests fail to offer a real-time unambiguous visualization of such hepatotoxicity .
View Article and Find Full Text PDFAdv Sci (Weinh)
May 2025
Strait Laboratory of Flexible Electronics (SLoFE), Fujian Key Laboratory of Flexible Electronics, Strait Institute of Flexible Electronics (Future Technologies), Fujian Normal University, Fuzhou, 350117, China.
Semiconducting open-shell radicals (SORs) have promising potential for the development of phototheranostic agents, enabling tumor bioimaging and boosting tumorous reactive oxygen species (ROS). Herein, a new class of semiconducting perylene diimide (PDI), designated as PDI(Br) with various numbers of bromine (Br) atoms modified on PDI's bay/ortho positions is reported. PDI(Br) is demonstrated to transform into a radical anion, [PDI(Br)], in a reducing solution, with a typical g-value of 2.
View Article and Find Full Text PDFInt J Biol Macromol
May 2025
Charité - Universitätsmedizin Berlin, Freie Universität Berlin and Humboldt-Universität zu Berlin, Department of Radiology, Charitéplatz 1, 10117 Berlin, Germany. Electronic address:
The virus protein CAV-Apoptin and its homologue HGV-Apoptin selectively kill cancer cells but are not suitable for systemic treatment. The aim was to develop Apoptin-based fusion proteins for intravenous application in cancer therapy, which also contain the hydrophilic polypeptide XTEN, a cleavage site for MMP-2/9, and a TAT peptide for cell penetration. Expression of XTEN864-HGV-Apoptin in E.
View Article and Find Full Text PDFAnal Chem
March 2025
College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China.
Alzheimer's disease (AD), a progressive neurodegenerative disorder, is associated with the complete loss of cognition, and its pathogenesis has been suggested to be closely linked to oxidative stress in the early stage. However, there is currently a lack of effective methods to provide direct evidence for dynamic development of the oxidative stress status during AD progression. Herein, through manipulating the multiple energy transfer between 4f electronic levels of lanthanide ions (Ln), we proposed an energy interception strategy to construct activatable NIR-IIb nanoprobe for visualizing oxidative stress level.
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