水氧-比提奥芬衍生物:合成和抗莱什曼活性
Rayanne Regina Beltrame Machado1, Deysiane Lima Salvador2, Carla Maria Beraldi Gomes2
1Laboratório de Inovação Tecnológica no Desenvolvimento de Fármacos e Cosméticos, Departamento de Ciências Básica da Saúde, Universidade Estadual de Maringá (UEM), Maringá, Brazil.
研究人员开发出新型的烯衍生物来对抗被忽视的热带疾病 - - 莱什曼病. 该化合物BT-1通过破坏其氧化还原平衡有效地向Leishmania amazonensis寄生虫.
科学领域:
- 医学化学
- 寄生虫学
- 热带疾病
背景情况:
- 莱什曼病是一种被忽视的热带疾病,需要新的治疗药物.
- 目前的治疗方法有限, 需要开发新药.
- 自然产品支架为合成药物发现提供了有前途的基础.
研究的目的:
- 合成和评估烯衍生物作为潜在的抗莱什曼药物.
- 识别针对亚马逊菌的强效和选择性化合物.
- 阐明最有效的化合物的作用机制.
主要方法:
- 基于天然产品的烯衍生物的合成.
- 在体外对Leishmania amazonensis的评估
- 对巨细胞的细胞毒性评估.
- 生物化学和超结构分析以确定作用机制.
主要成果:
- 比西奥芬衍生物BT-1显示强烈的抗莱什曼活性 (IC50=23.2μM) 和低细胞毒性 (CC50=216.5μM).
- 通过积累脂质体,增加活性氧物种和脂质过氧化,并破坏细胞结构,BT-1诱导了寄生虫死亡.
- 在接受治疗的寄生虫中观察到线粒体去极化和细胞内容的丧失.
- 这种机制涉及破坏寄生虫的氧化还原稳定.
结论:
- 由天然产品制成的烯衍生物是有效的合成抗莱什曼化合物.
- BT-1 是一种有前途的化合物,可用于进一步开发治疗莱什曼病.
- 针对寄生虫的氧化还原稳定是抗莱什曼药物发现的可行策略.
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相关概念视频
Preparation and Reactions of Sulfides
Preparation of Alkynes: Dehydrohalogenation
Alkynes can be prepared by dehydrohalogenation of vicinal or geminal dihalides in the presence of a strong base like sodium amide in liquid ammonia. The reaction proceeds with the loss of two equivalents of hydrogen halide (HX) via two successive E2 elimination reactions.
Preparation of Alkynes: Alkylation Reaction
Alkylation of terminal alkynes with primary alkyl halides in the presence of a strong base like sodium amide is one of the common methods for the synthesis of longer carbon-chain alkynes. For example, treatment of 1-propyne with sodium amide followed by reaction with ethyl bromide yields 2-pentyne.
Preparation and Reactions of Thiols
Alkynes to Aldehydes and Ketones: Hydroboration-Oxidation
One of the convenient methods for the preparation of aldehydes and ketones is via hydration of alkynes. Hydroboration-oxidation of alkynes is an indirect hydration reaction in which an alkyne is treated with borane followed by oxidation with alkaline peroxide to form an enol that rapidly converts into an aldehyde or a ketone. Terminal alkynes form aldehydes, whereas internal alkynes give ketones as the final product.
