The development of boronic probes enabled reliable detection and quantitative analysis of hydrogen peroxide , other nucleophilic hydroperoxides, hypochlorite , and peroxynitrite . The major product, in which boronate moiety of the probe is replaced by the hydroxyl group, is, however, common for all those oxidants. Here, we describe how ortho-isomer of mitochondria-targeted phenylboronic acid can be used to detect and differentiate peroxynitrite-dependent and independent probe oxidation. This method highlights detection and quantification of both the major, phenolic product and the minor, peroxynitrite-specific cyclic and nitrated products of probe oxidation.
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http://dx.doi.org/10.1007/978-1-0716-1262-0_20 | DOI Listing |
Anal Chem
January 2025
School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510632, China.
Luminol is a well-known electrochemiluminescence (ECL) fluorophore that is applied in various sensing fields as an ECL reporter. Regulating the signal off/on transition of an ECL fluorophore offers great opportunities for sensors' design; however, such attempts on luminol are extremely scarce as it was regarded to lack promising modification sites. In this study, we developed four luminol derivatives with modification at the amine site and the enol site and systematically explored possible caging strategies to regulate ECL emission.
View Article and Find Full Text PDFAnal Chem
January 2025
New Cornerstone Science Laboratory, MOE Key Laboratory for Analytical Science of Food Safety and Biology, College of Chemistry, Fuzhou University, Fuzhou 350108, P. R. China.
Evaluating tumor radiosensitivity is beneficial for the prediction of treatment efficacy, customization of treatment plans, and minimization of side effects. Tracking the mitochondrial DNA (mtDNA) repair process helps to assess tumor radiosensitivity as mtDNA repair determines the fate of the cell under radiation-induced mtDNA damage. However, current probes developed to monitor levels of DNA repair enzymes suffered from complex synthesis, uncontrollable preparation, limited tumor selectivity, and poor organelle-targeting ability.
View Article and Find Full Text PDFTalanta
December 2024
Key Laboratory of Medicinal Chemistry and Molecular Diagnosis (Hebei University), Ministry of Education, Key Laboratory of Analytical Science and Technology of Hebei Province, College of Chemistry and Materials Science, Hebei University, Baoding, 071002, Hebei, PR China. Electronic address:
Organophosphorus (OPs) pesticide residues pose significant threats to human health and the environment. To tackle this issue, we synthesized water-soluble fluorescent conjugated polymer nanoparticles (WSCPNs), which offer high fluorescence intensity, simple preparation methods, and ease of functionalization, making them ideal candidates for fluorescent sensing applications. These WSCPNs were subsequently used to prepare a WSCPNs@MnO probe via in situ synthesis, resulting in efficient fluorescence resonance energy transfer between WSCPNs and MnO₂.
View Article and Find Full Text PDFEur J Med Chem
December 2024
Department of Medicinal Chemistry, College of Pharmacy, University of Michigan, Ann Arbor, MI, 48109, USA; Life Sciences Institute, University of Michigan, Ann Arbor, MI, 48109, USA. Electronic address:
PDHK1 is a non-canonical Ser/Thr kinase that negatively regulates the pyruvate dehydrogenase complex (PDC), restricting entry of acetyl-CoA into the tricarboxylic acid (TCA) cycle and downregulating oxidative phosphorylation. In many glycolytic tumors, PDHK1 is overexpressed to suppress activity of the PDC and cause a shift in metabolism toward an increased reliance on glycolysis (the Warburg effect). Genetic studies have shown that knockdown or knockout of PDHK1 reverts this phenotype and inhibits tumor growth in vitro and in vivo, but chemical tools to pharmacologically validate and build upon these data are lacking.
View Article and Find Full Text PDFEnviron Sci Technol
January 2025
Department of Environmental Science, Zhejiang University, Hangzhou 310058, China.
Hydrogen peroxide (HO)-based advanced oxidation technology has emerged as a cost-effective and green solution for tackling soil pollution. Given the highly heterogeneous nature of soil, the effectiveness of HO remediation is significantly influenced by its diffusion distance in soils. However, the dynamics of HO diffusion and its effective range remain largely unexplored, primarily due to the lack of analytical methods for mapping HO in soils.
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