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靶向疟原虫血液期的新型喹啉哌嗪基芳基四唑类化合物 。 需注意,你提供的原文似乎不完整,最后缺少关键信息,以上译文是根据现有内容尽量完整通顺地翻译出来的。

Novel quinolinepiperazinyl-aryltetrazoles targeting the blood stage of .

作者信息

Barmade Mahesh A, Agrawal Prakhar, Rajput Sweta R, Murumkar Prashant R, Rana Bhavika, Sahal Dinkar, Yadav Mange Ram

机构信息

Faculty of Pharmacy, Kalabhavan Campus, The Maharaja Sayajirao University of Baroda Vadodara-390001 Gujarat India

Malaria Drug Discovery Laboratory, ICGEB Aruna Asaf Ali Marg New Delhi-110067 India

出版信息

RSC Med Chem. 2023 Dec 8;15(2):572-594. doi: 10.1039/d3md00417a. eCollection 2024 Feb 21.

Abstract

The emergence of drug resistance against the frontline antimalarials is a major challenge in the treatment of malaria. In view of emerging reports on drug-resistant strains of against artemisinin combination therapy, a dire need is felt for the discovery of novel compounds acting against novel targets in the parasite. In this study, we identified a novel series of quinolinepiperazinyl-aryltetrazoles (QPTs) targeting the blood stage of . anti-plasmodial activity screening revealed that most of the compounds showed IC < 10 μM against chloroquine-resistant INDO strain, with the most promising lead compounds 66 and 75 showing IC values of 2.25 and 1.79 μM, respectively. Further, compounds 64-66, 68, 75-77 and 84 were found to be selective (selectivity index >50) in their action against over a mammalian cell line, with compounds 66 and 75 offering the highest selectivity indexes of 178 and 223, respectively. Explorations into the action of lead compounds 66 and 75 revealed their selective cidal activity towards trophozoites and schizonts. In a ring-stage survival assay, 75 showed cidal activity against the early rings of artemisinin-resistant Cam3.1. Further, 66 and 75 in combination with artemisinin and pyrimethamine showed additive to weak synergistic interactions. Of these two lead molecules, only 66 restricted rise in the percentage of parasitemia to about 10% in -infected mice with a median survival time of 28 days as compared to the untreated control, which showed the percentage of parasitemia >30%, and a median survival of 20 days. Promising antimalarial activity, high selectivity, and additive interaction with artemisinin and pyrimethamine indicate the potential of these compounds to be further optimized chemically as future drug candidates against malaria.

摘要

对一线抗疟药物产生耐药性是疟疾治疗中的一项重大挑战。鉴于有关青蒿素联合疗法耐药菌株的新报道,人们迫切需要发现针对疟原虫新靶点的新型化合物。在本研究中,我们鉴定了一系列针对疟原虫血液阶段的新型喹啉哌嗪基芳基四唑(QPTs)。抗疟活性筛选显示,大多数化合物对氯喹耐药的INDO菌株的IC<10μM,最有前景的先导化合物66和75的IC值分别为2.25和1.79μM。此外,发现化合物64 - 66、68、75 - 77和84对疟原虫的作用比对哺乳动物细胞系具有选择性(选择性指数>50),化合物66和75的选择性指数最高,分别为178和223。对先导化合物66和75作用的探索揭示了它们对滋养体和裂殖体的选择性杀伤活性。在环状体存活试验中,75对青蒿素耐药的Cam3.1早期环状体显示出杀伤活性。此外,66和75与青蒿素和乙胺嘧啶联合使用显示出相加至弱协同相互作用。在这两个先导分子中,与未治疗的对照组相比,在感染疟原虫的小鼠中,只有66将寄生虫血症百分比的上升限制在约10%,中位生存时间为28天,而未治疗对照组的寄生虫血症百分比>30%,中位生存期为20天。有前景的抗疟活性、高选择性以及与青蒿素和乙胺嘧啶的相加相互作用表明,这些化合物有潜力作为未来抗疟药物候选物进行进一步的化学优化。

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