Araújo Sandra Alves de, Lima Aldilene da Silva, Rocha Cláudia Quintino da, Previtalli-Silva Henrique, Hardoim Daiana de Jesus, Taniwaki Noemi Nosomi, Calabrese Kátia da Silva, Almeida-Souza Fernando, Abreu-Silva Ana Lucia
Rede Nordeste de Biotecnologia, Universidade Federal do Maranhão, São Luís 65080-805, MA, Brazil.
Laboratório de Química dos Produtos Naturais, Universidade Federal do Maranhão, São Luís 65080-805, MA, Brazil.
Biology (Basel). 2023 Jun 22;12(7):895. doi: 10.3390/biology12070895.
Chagas disease is a severe infectious and parasitic disease caused by the protozoan and considered a public health problem. Chemotherapeutics are still the main means of control and treatment of the disease, however with some limitations. As an alternative treatment, plants have been pointed out due to their proven pharmacological properties. Many studies carried out with have shown several biological activities, but its effect against is still unknown. The objective of this work is to evaluate the therapeutic potential of extracts and fractions obtained from on the parasite , in addition to analyzing its antioxidant activity. ethyl acetate fraction were produced and submitted the chemical characterization by Liquid Chromatography Coupled to Mass Spectrometry (LC-MS). From all extracts and fractions evaluated, the ethyl acetate and the aqueous fraction displayed the best antioxidant activity by the 2,2-diphenyl-1-picryl-hydrazyl (DPPH) radical scavenging method (IC of 7.77 ± 1.61 and 5.26 ± 1.26 µg/mL respectively), and by ferric ion reducing (FRAP) method (687.61 ± 0.26 and 1009.32 ± 0.13 µM of Trolox equivalent/mg extract, respectively). The ethyl acetate fraction showed remarkable inhibitory activity with IC of 8.86 ± 1.13, 24.91 ± 1.15 and 85.01 ± 1.21 µg/mL against epimastigotes, trypomastigotes and intracellular amastigotes, respectively, and showed no cytotoxicity for Vero cells (CC > 1000 µg/mL). The treatment of epimastigotes with the ethyl acetate fraction led to drastic ultrastructural changes such as the loss of cytoplasm organelles, cell disorganization, nucleus damage and the loss of integrity of the parasite. This effect could be due to secondary compounds present in this extract, such as luteolin, kaempferol, quercetin, ellagic acid and derivatives. The ethyl acetate fraction obtained from leaves can be an effective alternative in the treatment and control of Chagas disease, and material for further investigations.
恰加斯病是一种由原生动物引起的严重传染性寄生虫病,被视为一个公共卫生问题。化疗药物仍然是控制和治疗该疾病的主要手段,然而存在一些局限性。作为一种替代治疗方法,植物因其已被证实的药理特性而受到关注。对[植物名称]进行的许多研究显示了其多种生物活性,但其对[寄生虫名称]的作用仍不清楚。这项工作的目的是评估从[植物名称]中获得的提取物和馏分对寄生虫[寄生虫名称]的治疗潜力,此外还分析其抗氧化活性。制备了[植物名称]的乙酸乙酯馏分,并通过液相色谱-质谱联用(LC-MS)进行化学表征。在所评估的所有[植物名称]提取物和馏分中,乙酸乙酯馏分和水相馏分通过2,2-二苯基-1-苦基肼(DPPH)自由基清除法显示出最佳的抗氧化活性(IC50分别为7.77±1.61和5.26±1.26μg/mL),以及通过铁离子还原(FRAP)法(分别为687.61±0.26和1009.32±0.13μM Trolox当量/mg提取物)。乙酸乙酯馏分对前鞭毛体、锥鞭毛体和细胞内无鞭毛体显示出显著的抑制活性,IC50分别为8.86±1.13、24.91±1.15和85.01±1.21μg/mL,并且对Vero细胞无细胞毒性(CC50>1000μg/mL)。用乙酸乙酯馏分处理前鞭毛体导致了剧烈的超微结构变化,如细胞质细胞器的丧失、细胞紊乱、细胞核损伤以及寄生虫完整性的丧失。这种作用可能归因于该提取物中存在的次生化合物,如木犀草素、山柰酚、槲皮素、鞣花酸及其衍生物。从[植物名称]叶子中获得的乙酸乙酯馏分可以成为治疗和控制恰加斯病的有效替代方法,以及进一步研究的材料。