Synthesis and biological evaluation of new pyrazolone–pyridazine conjugates as anti-inflammatory and analgesic agents
作者:Nadia Abdalla Khalil、Eman Mohamed Ahmed、Khaled Omar Mohamed、Yassin Mohammed Nissan、Sawsan Abo-Bakr Zaitone
DOI:10.1016/j.bmc.2014.02.042
日期:2014.4
A new series of pyrazolone-pyridazine conjugates 3 and 4a-1 were synthesized and characterized by spectroscopic means and elemental analyses. All compounds were tested in vivo for their anti-inflammatory and analgesic properties against diclofenac, as reference compound. The synthesized compounds were also evaluated for their ability to inhibit the production of certain inflammatory cytokines such as TNF-alpha and IL-6 in serum samples. The ulcerogenic potential of the synthesized compounds was also determined. IC50 values for inhibition of COX-1 and COX-2 enzymes were investigated in vitro for the most active candidates. Molecular docking was performed on the active site of COX-2 to predict their mode of binding to the amino acids. Among the synthesized derivatives, compounds 4c and 4e showed good analgesic and anti-inflammatory activities with lower ulcer index than the reference drug. (C) 2014 Elsevier Ltd. All rights reserved.