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The synthesis and characterization of the full family of 11 pyrazoles were performed by means of UV-Vis, FTIR, H-1 NMR, C-13 NMR, two-dimensional NMR experiments and DFT simulations. As pyrazoles are known for showing diverse biological actions, they were also tested in the NCI-60 cancer cell line panel, showing moderate to good activity against different cell lines. Furthermore, the anti-proinflammatory activity test of a set of pyrazoles of the form (E)-4-((4-bro mophenyl)diazenyl)-3,5-dimethyl-1-R-phenyl-1H-pyrazole was performed, this is based on the study of the blockage of the increase in intracellular [Ca2+] observed in response to platelet-activating factor (PAF) treatment of four pyrazoles (i.e. 6, 8, 9 and 10), which successfully displayed [Ca2+] channel inhibition. Therefore, the obtained intracellular [Ca2+] signal results indicate that the pyrazole family characterized in this study, in particular compounds 6 and 10, are potent blockers of the PAF-initiated Ca2+ signaling that mediates the hyperpermeability typically observed during the development of inflammation. (C) 2020 The Author(s). Published by Elsevier B.V. on behalf of King Saud University.


Burboa-Schettino, Pia;  Bustos, Carlos;  Molins, Elies;  Figueroa, Xavier F.;  Llanquinao, Jesus;  Zarate, Ximena;  Vallejos, Gabriel;  Diaz-Uribe, Carlos;  Vallejo, William;  Schott, Eduardo

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