背景:十二指肠贾第鞭毛虫在人类中引起贾第鞭毛虫病,特别是在发展中国家。尽管有治疗方法,已经报道了对一些商业抗贾第鞭毛虫药物的抗性以及它们的有害副作用。因此,贾第鞭毛虫病需要新的治疗方法。在这项研究中,我们的目的是评估Ageratumconyzoides的粗提物对十二指肠G.滋养体的体外活性。
方法:根据花色将植物分为三组:白色(W),紫色(P),和白色紫色(W-P)。将植物分别切成叶(L)和花(F)部分。使用透射电子显微镜(TEM)评估了暴露于粗提取物后滋养体内部细胞器形态的变化。在随后的实验中,测试了粗提物中最具活性的精油对十二指肠滋养体的功效[最大抑制浓度的一半(IC50)≤100μg/mL]。以与使用粗提物进行的那些相同的方式进行使用精油的体外抗贾第虫测定。
结果:LW-P和FP提取物对十二指肠G滋养体显示出高活性(IC50≤100μg/mL),IC50±SD值为45.67±0.51和96.00±0.46μg/mL,分别。在随后的实验中,LW-P和FP精油的IC50±SD值分别为35.00±0.50和89.33±0.41μg/mL,分别。TEM显示暴露于粗提物后,十二指肠G.滋养体的鞭毛和腹盘变性。
结论:合子的LW-P和FP粗提物对十二指肠G的活性最高。暴露于粗提物引起的鞭毛和十二指肠滋养体的腹盘的变化,在附着于粘膜细胞表面中起重要作用。我们的结果表明,所测试的提取物需要进一步研究其作为贾第鞭毛虫病治疗的功效和安全性。
BACKGROUND: Giardia duodenalis causes giardiasis in humans, particularly in developing countries. Despite the availability of treatments, resistance to some of the commercial anti-Giardia drugs has been reported in addition to their harmful side effects. Therefore, novel treatments for giardiasis are required. In this
study, we aimed to assess the in vitro activity of crude extracts of Ageratum conyzoides against G. duodenalis
trophozoites.
METHODS: Plants were classified into three groups based on their flower colors: white (W), purple (P), and white-purple (W-P). Plants were separately cut into leaf (L) and flower (F) parts. Changes in internal organelle morphology of
trophozoites following exposure to crude extracts were assessed using transmission electron microscopy (TEM). In subsequent experiments, efficacy of the most active essential oils from crude extracts [half maximal inhibitory concentrations (IC50) ≤ 100 μg/mL] against G. duodenalis trophozoites was tested. In vitro anti-Giardia assays using essential oils were performed in the same way as those performed using crude extracts.
RESULTS: LW-P and FP extracts showed high activity (IC50 ≤ 100 μg/mL) against G. duodenalis trophozoites, with IC50 ± SD values of 45.67 ± 0.51 and 96.00 ± 0.46 μg/mL, respectively. In subsequent experiments, IC50 ± SD values of LW-P and FP essential oils were 35.00 ± 0.50 and 89.33 ± 0.41 μg/mL, respectively. TEM revealed the degeneration of flagella and ventral discs of G. duodenalis
trophozoites following exposure to crude extracts.
CONCLUSIONS: Crude LW-P and FP extracts of A. conyzoides showed the highest activity against G. duodenalis. Exposure to crude extract induced changes in the flagella and ventral discs of G. duodenalis
trophozoites, which play important roles in attachment to the surface of mucosal cells. Our results suggest that the tested extracts warrant further research in terms of their efficacy and safety as giardiasis treatment.