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The combination therapy of meglumine antimoniate and oxiranes (epoxy-α-lapachone and epoxymethyl-lawsone) enhance the leishmanicidal effect in mice infected by Leishmania (Leishmania) amazonensis.
International Journal for Parasitology: Drugs and Drug Resistance ( IF 4.1 ) Pub Date : 2019-08-12 , DOI: 10.1016/j.ijpddr.2019.08.002
Luiz Filipe Gonçalves-Oliveira 1 , Franklin Souza-Silva 2 , Luzia Monteiro de Castro Côrtes 1 , Laura Barral Veloso 1 , Bernardo Acácio Santini Pereira 1 , Lea Cysne-Finkelstein 3 , Guilherme Curty Lechuga 4 , Saulo Cabral Bourguignon 5 , Fernando Almeida-Souza 6 , Kátia da Silva Calabrese 7 , Vitor Francisco Ferreira 8 , Carlos Roberto Alves 1
Affiliation  

Current treatment of cutaneous leishmaniasis includes pentavalent antimonials as first-line drugs, but this therapy has shown severe adverse effects. An alternative to minimize this issue is based on combination therapy scheme with other drugs. In this study we analyzed the potential of the association of meglumine antimoniate (MA) with the oxiranes epoxy-α-lapachone (LAP) or epoxymethyl-lawsone (LAW). Results demonstrated that association between these drugs enhanced leishmanicidal activity on Leishmania (Leishmania) amazonensis infection. The compounds were tested in monotherapy or in combinations (3:1; 1:1 and 1:3) and reduced intracellular parasite numbers, measured by the endocytic index, in all tested conditions. The most effective combination regimens were MA/LAP or MA/LAW in 3:1 ratio, which achieved a reduction of 98.3% and 93.6% in the endocytic index, respectively. BALB/c mice challenged with L. (L.) amazonensis showed significant reduction in lesion size and parasite load in both footpad and lymph nodes, after four weeks of treatment. Although, MA, LAP or LAW monotherapy were able to control the evolution of lesions when compared to untreated animals (30%, 40% and 40% of reduction, respectively), the combination of MA/LAP and LAW in 3:1 ratio showed better results reducing 61.7 and 54.4%, respectively. The results indicate that the association of meglumine antimoniate to oxiranes lead to an increment in the antileishmanial activity and represent a promising approach for the cutaneous leishmaniasis treatment.

中文翻译:

葡甲胺锑酸盐和奥西拉内酯(环氧-α-拉帕酮和环氧甲基-异黄酮)的联合治疗可增强被亚马逊利什曼原虫(Leishmania)感染的小鼠的利什曼杀菌作用。

当前的皮肤利什曼病的治疗包括五价锑作为一线药物,但是这种疗法显示出严重的副作用。最小化此问题的替代方法是基于与其他药物的联合治疗方案。在这项研究中,我们分析了葡甲胺锑酸盐(MA)与环氧乙烷环氧-α-拉帕酮(LAP)或环氧甲基-紫罗兰酮(LAW)缔合的潜力。结果表明,这些药物之间的结合增强了对利什曼原虫(Leishmania)amazonensis感染的利什曼杀菌活性。在所有测试条件下,以单一疗法或组合疗法(3:1、1:1和1:3)对化合物进行了测试,并通过胞吞指数测量了减少的细胞内寄生虫数量。最有效的组合方案是MA / LAP或MA / LAW的3:1比例,分别降低了98.3%和93。内吞指数分别为6%。经过四周的治疗,用亚马逊L.(L.)攻击的BALB / c小鼠在脚垫和淋巴结中均显示出病变大小和寄生虫负荷的显着减少。尽管与未治疗的动物相比,MA,LAP或LAW单药疗法能够控制病变的进展(分别减少30%,40%和40%),但MA / LAP和LAW的比例为3:1更好的结果分别减少了61.7%和54.4%。结果表明,葡甲胺锑酸盐与奥西拉酮的结合导致抗疟疾活性增加,并且代表了皮肤利什曼病治疗的有前途的方法。治疗四周后,亚马逊足癣和淋巴结的病灶大小和寄生虫负荷均明显降低。尽管与未治疗的动物相比,MA,LAP或LAW单药疗法能够控制病变的进展(分别减少30%,40%和40%),但MA / LAP和LAW的比例为3:1更好的结果分别减少了61.7%和54.4%。结果表明,葡甲胺锑酸盐与奥西拉酮的结合导致抗疟疾活性增加,并且代表了皮肤利什曼病治疗的有前途的方法。治疗四周后,亚马逊足癣和淋巴结的病灶大小和寄生虫负荷均明显降低。尽管与未治疗的动物相比,MA,LAP或LAW单药疗法能够控制病变的进展(分别减少30%,40%和40%),但MA / LAP和LAW的比例为3:1更好的结果分别减少了61.7%和54.4%。结果表明,葡甲胺锑酸盐与奥西拉酮的结合导致抗疟疾活性增加,并且代表了皮肤利什曼病治疗的有前途的方法。MA / LAP和LAW的比例为3:1的组合显示出更好的结果,分别降低了61.7%和54.4%。结果表明,葡甲胺锑酸盐与奥西拉酮的结合导致抗疟疾活性增加,并且代表了皮肤利什曼病治疗的有前途的方法。MA / LAP和LAW的比例为3:1的组合显示出更好的结果,分别降低了61.7%和54.4%。结果表明,葡甲胺锑酸盐与奥西拉酮的结合导致抗疟疾活性增加,并且代表了皮肤利什曼病治疗的有前途的方法。
更新日期:2019-11-01
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