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https://www.selleckchem.com/products/bms-986020.html DNA (cytosine-5)-methyltransferase1 (DNMT1) is the most abundant DNA methyltransferase in somatic cells, and it plays an important role in the initiation, occurrence, and rehabilitation of tumors. Herein, we developed a novel strategy for the detection of the level of DNMT1 in human plasma using the self-assembled nucleic acid probe signal amplification technology. In this method, the DNMT1 monoclonal antibody (McAbDNMT1) was immobilized on carboxyl magnetic beads to form immunomagnetic beads and then captured DNMT1 specifically. After that, DNMT1 polyclonal antibody (PcAbDNMT1) and biotinylated sheep anti-rabbit IgG (sheep anti rabbit IgG-Biotin) were sequentially added into the system to react with DNMT1 and form biotinylated double antibody sandwich immunomagnetic beads. In the presence of the bridging medium streptavidin, the biotinylated double antibody sandwich immunomagnetic beads would form a complex with biotinylated poly-fluorescein (Biotin-poly FAM), and the fluorescence intensity of the complex was proportional to the concentration of DNMT1. Immunomagnetic beads can capture the target DNMT1 in the sample, and Biotin-poly FAM can realize signal amplification. Using these strategies, we got a linear range of the system for DNMT1 level detection was from 2 nmol/L to 200 nmol/L, and the limit of detection (LOD) was 0.05 nmol/L. The method was successfully applied for the determination of DNMT1 in human plasma with the recovery of 101.3-106.0%. Therefore, this method has the potential for the detection of DNMT1 level in clinical diagnosis.Hypochlorite (ClO-), a type of reactive oxygen species (ROS), plays an essential role in complex biological systems. Real-time detection of the content and distribution of ClO- in cells or subcellular organelle is critically essential. In this paper, a lysosomal-targeted fluorescent probe, Cou-Lyso, was constructed for real-time detection of ClO- in a ratiometric manner, a

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