Design, Synthesis and Biological Screening of Some Pyridinylpyrazole and Pyridinylisoxazole Derivatives as Potential Anti-inflammatory, Analgesic, Antipyretic and Antimicrobial Agents
作者:Soad El-Hawash、Raafat Soliman、Amal Youssef、Hanan Ragab、Perihan Elzahhara、Ibrahim El-Ashmawey、Abeer Abdel Wahab、Iman Shaat
DOI:10.2174/15734064113096660044
日期:2014.3.31
A series of substituted pyridinylpyrazole (or isoxazole) derivatives were synthesized and evaluated for their anti-inflammatory (AI) activity using formalin-induced paw edema bioassays. Their inhibitory activities of cyclooxygenase-1 and cyclooxygenase-2 (COX-1 and COX-2) were also determined. The analgesic activity of the same compounds was evaluated using rat-tail withdrawal technique. Their antipyretic activity was also evaluated. The results revealed that compounds 4a,b, 6a, 8a, 14c and 15a exhibited significant AI and analgesic activities. Compounds 5a, 6a and 8a displayed good antipyretic activity. Compounds 14c and 15a showed good COX-2 inhibitory activity and weak inhibition of COX-1. Additionally, the most active compounds were shown to have a large safety margin (ALD50 300-400 mg / Kg) and minimal ulcerogenic potentialities when administered orally at a dose of 300 mg/Kg. Docking studies for 14c and 15a with COX-2 showed good binding profile. Antimicrobial evaluation proved that most of the compounds exhibited distinctive activity against the gram negative bacteria, P. aeruginosa and E coli.
一系列取代的吡啶基吡唑(或异噁唑)衍生物被合成并评估其抗炎(AI)活性,采用福尔马林诱导的爪部水肿生物测定法。同时,还确定了它们对环氧化酶-1和环氧化酶-2(COX-1和COX-2)的抑制活性。采用大鼠尾部撤回技术评估了相同化合物的镇痛活性。还评估了它们的退烧活性。结果显示,化合物4a、4b、6a、8a、14c和15a表现出显著的抗炎和镇痛活性。化合物5a、6a和8a显示出良好的退烧活性。化合物14c和15a表现出良好的COX-2抑制活性,而对COX-1的抑制较弱。此外,最活跃的化合物在口服300 mg/Kg剂量下显示出较大的安全边际(ALD50 300-400 mg/Kg)和最小的溃疡生成潜力。与COX-2的对接研究显示化合物14c和15a具有良好的结合特性。抗菌评估证明大多数化合物对革兰氏阴性细菌(如铜绿假单胞菌和大肠杆菌)表现出显著活性。