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Anti-amoebic Activity of Leaf Extracts and Aporphine Alkaloids Obtained from Annona purpurea
Planta Medica ( IF 2.7 ) Pub Date : 2020-02-27 , DOI: 10.1055/a-1111-9566
César Díaz-Godínez 1 , Julio C. Ontiveros-Rodríguez 2 , Diana G. Ríos-Valencia 3 , José Enrique Herbert-Pucheta 4 , L. Gerardo Zepeda-Vallejo 5 , Julio César Carrero 1
Affiliation  

Annona purpurea has been traditionally used by indigenous and socioeconomically disadvantaged people to treat infectious and parasitic diseases, including amoebiasis. The goal of this study was to assess the effect of a crude methanolic extract, an alkaloid extract, and aporphine alkaloids from leaves of A. purpurea on the viability of Entamoeba histolytica trophozoite cultures and to identify the mechanism of action. Different concentrations of the extracts and alkaloids purpureine (1: ), 3-hydroxyglaucine (2: ), norpurpureine (3: ) glaziovine (4: ), and oxopurpureine (5: ) were added to the cultures, and dead parasites were counted after 24 h using a tetrazolium dye reduction assay and analyzed by flow cytometry. The crude extract did not affect the viability of amoebae, but the alkaloid extract and the derived alkaloid glaziovine (4: ) had important anti-amoebic activity with an IC50 of 33.5 µM compared to that shown by metronidazole (6.8 µM). The treatments induced significant morphological changes in the trophozoites, and most parasites killed by the alkaloid extract were positive for Annexin V, suggesting that apoptosis was the main mechanism of action. In contrast, glaziovine (4: ) induced less apoptosis with more amoebic lysis. This study supports the idea that aporphine alkaloids from A. purpurea, mainly (+)-(R)-glaziovine (4: ), could contribute to the development of new formulations for the treatment of amoebiasis. In addition, X-ray diffraction structural analysis and complete 1H and 13C NMR assignments of (+)-(R)-glaziovine (4: ) were performed and reported for the first time.

中文翻译:

从番荔枝中提取的叶提取物和阿朴啡生物碱的抗阿米巴活性

传统上,原住民和社会经济上处于不利地位的人使用番荔枝来治疗包括阿米巴病在内的传染病和寄生虫病。本研究的目的是评估来自 A. purpurea 叶子的粗甲醇提取物、生物碱提取物和阿朴啡生物碱对溶组织内阿米巴滋养体培养物的活力的影响,并确定其作用机制。将不同浓度的提取物和生物碱紫嘌呤 (1: )、3-羟基青霉素 (2: )、去甲紫杉碱 (3: ) 甘草碱 (4: ) 和氧代紫杉碱 (5: ) 添加到培养物中,然后计数死寄生虫24 小时使用四唑染料还原测定并通过流式细胞术分析。粗提物不影响变形虫的生存能力,但生物碱提取物和衍生的生物碱 Glaziovine (4: ) 具有重要的抗阿米巴活性,与甲硝唑 (6.8 µM) 相比,IC50 为 33.5 µM。处理诱导滋养体的显着形态变化,并且大多数被生物碱提取物杀死的寄生虫对膜联蛋白V呈阳性,表明细胞凋亡是主要作用机制。相比之下,glaziovine (4: ) 诱导更少的细胞凋亡,更多的阿米巴裂解。该研究支持这样的观点,即来自 A. purpurea 的阿朴啡生物碱,主要是 (+)-(R)-glaziovine (4: ),可以有助于开发治疗阿米巴病的新制剂。此外,首次进行并报告了 (+)-(R)-glaziovine (4: ) 的 X 射线衍射结构分析和完整的 1H 和 13C NMR 分配。5 µM 与甲硝唑 (6.8 µM) 显示的相比。处理诱导滋养体的显着形态变化,生物碱提取物杀死的大多数寄生虫对膜联蛋白 V 呈阳性,表明细胞凋亡是主要作用机制。相比之下,glaziovine (4: ) 诱导更少的细胞凋亡,更多的阿米巴裂解。该研究支持这样的观点,即来自 A. purpurea 的阿朴啡生物碱,主要是 (+)-(R)-glaziovine (4: ),可以有助于开发治疗阿米巴病的新制剂。此外,首次进行并报告了 (+)-(R)-glaziovine (4: ) 的 X 射线衍射结构分析和完整的 1H 和 13C NMR 分配。5 µM 与甲硝唑 (6.8 µM) 显示的相比。处理诱导滋养体的显着形态变化,生物碱提取物杀死的大多数寄生虫对膜联蛋白 V 呈阳性,表明细胞凋亡是主要作用机制。相比之下,glaziovine (4: ) 诱导更少的细胞凋亡,更多的阿米巴裂解。该研究支持这样的观点,即来自 A. purpurea 的阿朴啡生物碱,主要是 (+)-(R)-glaziovine (4: ),可以有助于开发治疗阿米巴病的新制剂。此外,首次进行并报告了 (+)-(R)-glaziovine (4: ) 的 X 射线衍射结构分析和完整的 1H 和 13C NMR 分配。大多数被生物碱提取物杀死的寄生虫呈Annexin V阳性,表明细胞凋亡是主要作用机制。相比之下,glaziovine (4: ) 诱导更少的细胞凋亡,更多的阿米巴裂解。该研究支持这样的观点,即来自 A. purpurea 的阿朴啡生物碱,主要是 (+)-(R)-glaziovine (4: ),可以有助于开发治疗阿米巴病的新制剂。此外,首次进行并报告了 (+)-(R)-glaziovine (4: ) 的 X 射线衍射结构分析和完整的 1H 和 13C NMR 分配。大多数被生物碱提取物杀死的寄生虫呈Annexin V阳性,表明细胞凋亡是主要作用机制。相比之下,glaziovine (4: ) 诱导更少的细胞凋亡,更多的阿米巴裂解。该研究支持这样的观点,即来自 A. purpurea 的阿朴啡生物碱,主要是 (+)-(R)-glaziovine (4: ),可以有助于开发治疗阿米巴病的新制剂。此外,首次进行并报告了 (+)-(R)-glaziovine (4: ) 的 X 射线衍射结构分析和完整的 1H 和 13C NMR 分配。可能有助于开发治疗阿米巴病的新制剂。此外,首次进行并报告了 (+)-(R)-glaziovine (4: ) 的 X 射线衍射结构分析和完整的 1H 和 13C NMR 分配。可能有助于开发治疗阿米巴病的新制剂。此外,首次进行并报告了 (+)-(R)-glaziovine (4: ) 的 X 射线衍射结构分析和完整的 1H 和 13C NMR 分配。
更新日期:2020-02-27
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