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https://www.selleckchem.com/products/pf-06826647.html Extremely low-frequency electromagnetic fields (ELF-EMFs) present a kind of common non-ionizing radiation in public and occupational environments. Previous studies have suggested that ELF-EMF exposure might have a potential impact on co-carcinogenesis and the progression of tumorigenesis by inducing cell proliferation. However, the underlying mechanisms remain largely unknown. In this study, we investigated the possible role of the sphingosine-1-phosphate (S1P)-related pathway in regulating cell proliferation induced by 50-Hz, 0.4-mT magnetic-field (MF) exposure. The results showed that MF exposure significantly promoted sphingosine kinase 1 (SphK1) activity, and that inhibition of the SphK1-S1P-S1P receptor (S1PR) pathway could remarkably reverse MF-induced cell proliferation. Additionally, we could infer indirectly from an exogenous-S1P experiment that MF-induced S1P might act on S1PR1/3 in a paracrine and/or autocrine manner to mediate the proliferation effect. Notably, although the MF activated the extracellular signal-regulated kinase (ERK) and protein kinase B (Akt) pathways, the SphK1-S1P-S1PR1/3 cascade regulated MF-induced proliferation by activating the ERK rather than the Akt pathway. Taken together, the findings of this study indicated that the SphK1-S1P-S1PR1/3 cascade played an important role in MF-induced proliferation by mediating the ERK signaling pathway, which could bring new insights into understanding and preventing the adverse effects of MFs. Conversion of perfluoroalkyl acid (PFAA) precursors in the environment has been a hotspot research in recent years. This study firstly determined the spatial distribution of PFAAs and their precursors including 82 fluorotelomer unsaturated acid (82 FTUCA), perfluorooctane sulfoneamide (FOSA), and diperfluorooctane sulfonamido ethanol-based phosphate (di-SAmPAP), then investigated the conversion of the potential precursors in the seawater and sewage trea

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