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Leveraging the Medicines for Malaria Venture malaria and pathogen boxes to discover chemical inhibitors of East Coast fever.
International Journal for Parasitology: Drugs and Drug Resistance ( IF 4.1 ) Pub Date : 2019-02-17 , DOI: 10.1016/j.ijpddr.2019.01.002
James Nyagwange 1 , Elias Awino 2 , Edwin Tijhaar 3 , Nicholas Svitek 2 , Roger Pelle 4 , Vishvanath Nene 2
Affiliation  

Chemotherapy of East Coast fever, a lymphoproliferative cancer-like disease of cattle causing significant economic losses in Africa, is largely dependent on the use of buparvaquone, a drug that was developed in the late 1980's. The disease is caused by the tick-borne protozoan pathogen Theileria parva. Buparvaquone can be used prophylactically and it is also active against tropical theileriosis, caused by the related parasite Theileria annulata. Recently, drug resistance was reported in T. annulata, and could occur in T. parva. Using a 3H-thymidine incorporation assay we screened 796 open source compounds from the Medicines for Malaria Venture (MMV) to discover novel chemicals with potential inhibitory activity to T. parva. We identified nine malaria box compounds and eight pathogen box compounds that inhibited the proliferation of F100TpM, a T. parva infected lymphocyte cell line. However, only two compounds, MMV008212 and MMV688372 represent promising leads with IC50 values of 0.78 and 0.61 μM, respectively, and CC50 values > 5 μM. The remaining compounds exhibited a high degree of toxicity (CC50 values < 1.09 μM) on the proliferation of bovine peripheral blood mononuclear cells stimulated with concanavalin A. We also tested the anti-cancer drug, dasatinib, used in the chemotherapy of some leukemias. Dasatinib was as active and safe as buparvaquone in vitro, with an IC50 of 5 and 4.2 nM, respectively, and CC50 > 10 μM. Our preliminary data suggest that it may be possible to repurpose compounds from the cancer field as well as MMV as novel anti-T. parva molecules.

中文翻译:

利用疟疾药物开拓疟疾和病原体箱,发现东海岸热的化学抑制剂。

东海岸热的化学疗法是牛的一种淋巴增生性癌样疾病,在非洲造成了巨大的经济损失,其化学疗法在很大程度上取决于使用buparvaquone(一种在1980年代后期开发的药物)。该疾病是由the传播的原生动物病原体Theileria parva引起的。丁苯哌丁酮可预防性使用,并且还对由相关寄生虫环线虫泰勒虫引起的热带泰勒虫病具有活性。最近,有报道称在环线虫中有耐药性,并且可能在细线虫中发生。我们使用3H-胸腺嘧啶核苷掺入法从疟疾药物协会(MMV)筛选了796种开源化合物,以发现对T. parva有潜在抑制活性的新型化学物质。我们鉴定了9种抑制F100TpM增殖的疟疾框化合物和8种病原体框化合物,T. parva感染的淋巴细胞细胞系。但是,只有两种化合物MMV008212和MMV688372代表有希望的潜在客户,其IC50值分别为0.78和0.61μM,CC50值> 5μM。其余化合物对伴刀豆球蛋白A刺激的牛外周血单核细胞的增殖表现出高度毒性(CC50值<1.09μM)。我们还测试了用于某些白血病化学疗法的抗癌药物达沙替尼。达沙替尼在体外与buparvaquone一样活跃和安全,IC50分别为5和4.2 nM,CC50> 10μM。我们的初步数据表明,可能有可能将来自癌症领域的化合物以及MMV用作新型抗T药物。parva分子。MMV008212和MMV688372代表有希望的潜在客户,其IC50值分别为0.78和0.61μM,CC50值> 5μM。其余化合物对伴刀豆球蛋白A刺激的牛外周血单核细胞的增殖表现出高度毒性(CC50值<1.09μM)。我们还测试了用于某些白血病化学疗法的抗癌药物达沙替尼。达沙替尼在体外与buparvaquone一样活跃和安全,IC50分别为5和4.2 nM,CC50> 10μM。我们的初步数据表明,可能有可能将来自癌症领域的化合物以及MMV用作新型抗T药物。parva分子。MMV008212和MMV688372代表有希望的潜在客户,其IC50值分别为0.78和0.61μM,CC50值> 5μM。其余化合物对伴刀豆球蛋白A刺激的牛外周血单核细胞的增殖表现出高度毒性(CC50值<1.09μM)。我们还测试了用于某些白血病化学疗法的抗癌药物达沙替尼。达沙替尼在体外与buparvaquone一样活跃和安全,IC50分别为5和4.2 nM,CC50> 10μM。我们的初步数据表明,可能有可能将来自癌症领域的化合物以及MMV用作新型抗T药物。parva分子。09μM)对伴刀豆球蛋白A刺激的牛外周血单核细胞增殖的影响。我们还测试了用于某些白血病化疗的抗癌药物达沙替尼。达沙替尼在体外与buparvaquone一样活跃和安全,IC50分别为5和4.2 nM,CC50> 10μM。我们的初步数据表明,可能有可能将来自癌症领域的化合物以及MMV用作新型抗T药物。parva分子。09μM)对伴刀豆球蛋白A刺激的牛外周血单核细胞增殖的影响。我们还测试了用于某些白血病化疗的抗癌药物达沙替尼。达沙替尼在体外与buparvaquone一样活跃和安全,IC50分别为5和4.2 nM,CC50> 10μM。我们的初步数据表明,可能有可能将来自癌症领域的化合物以及MMV用作新型抗T药物。parva分子。我们的初步数据表明,可能有可能将来自癌症领域的化合物以及MMV用作新型抗T药物。parva分子。我们的初步数据表明,可能有可能将来自癌症领域的化合物以及MMV用作新型抗T药物。parva分子。
更新日期:2019-11-01
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