Combating multi-drug resistant malaria parasite by inhibiting falcipain-2 and heme-polymerization: Artemisinin-peptidyl vinyl phosphonate hybrid molecules as new antimalarials
作者:Eswar K. Aratikatla、Md Kalamuddin、Kalpeshkumar C. Rana、Gaurav Datta、Mohd Asad、Srividhya Sundararaman、Pawan Malhotra、Asif Mohmmed、Asish K. Bhattacharya
DOI:10.1016/j.ejmech.2021.113454
日期:2021.8
able to reduce the clinical and pathological malaria cases in endemic areas around the globe. However, recent reports have shown a progressive decline in malaria parasite clearance in South-east Asia after ACT treatment, thus envisaging a need for new artemisinin (ART) derivatives and combinations. To address the emergence of drug resistance to current antimalarials, here we report the synthesis of artemisinin-peptidyl
基于青蒿素的联合疗法 (ACTs) 已经能够减少全球流行地区的临床和病理性疟疾病例。然而,最近的报告显示,在 ACT 治疗后,东南亚的疟疾寄生虫清除率逐渐下降,因此需要新的青蒿素 (ART) 衍生物和组合。为了解决对当前抗疟药产生耐药性的问题,我们在此报告了青蒿素-肽基乙烯基膦酸酯杂化分子的合成,该分子显示出比单独使用青蒿素更有效的抗氯喹抗药性和多重抗药性恶性疟原虫菌株的 EC 50在皮摩尔范围内。此外,与青蒿素相比,这些化合物有效地抑制了实验室适应的青蒿素抗性寄生虫系的环期寄生虫的存活。与单独使用青蒿素相比,使用伯氏疟原虫小鼠疟疾模型,这些杂交分子在体内显示出完全的寄生虫清除。对杂化分子作用方式的研究表明,这些青蒿素-肽基乙烯基膦酸酯杂化分子具有双重活性:抑制恶性疟原虫(FP-2) 活性、恶性疟原虫半胱氨酸蛋白酶参与血红蛋白降解,还阻断了食物液泡中血红素的形成,早先的一步表明被青蒿素阻断