总合成和评价的异-二甲素SA和异-亚泰克素SA
Karen S MacMillan1, Trinh Nguyen, Trihn Nguyen
1Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, USA.
Journal of the American Chemical Society
|January 22, 2009
概括
研究人员合成了新的二甲胺类同类物,即异二甲胺SA和异亚甲胺,具有改变的化子单元. 这些化合物显示出强大的DNA化和细胞毒性,为天然产品药物设计提供了洞察力.
科学领域:
- 药用化学 医学化学
- 有机合成 有机合成
- 分子生物学分子生物学
背景情况:
- 天然产品如二甲素SA和雅塔基素是强大的DNA化剂.
- 它们的细胞毒性活动与DNA结合和化效率有关.
- 了解结构-活动关系对于开发新疗法至关重要.
研究的目的:
- 合成和评估异构二甲素SA和异构亚甲素,与异构化子单元的类似物.
- 研究结构修改对DNA化选择性,稳定性和细胞毒性活动的影响.
- 探索独特的螺旋循环化途径及其对药物设计的影响.
主要方法:
- 总合成的iso-duocarmycin SA和iso-yatakemycin类似物.
- 对DNA化区域选择性和稳定性的评估.
- 使用L1210细胞系进行细胞毒性测定.
- 一种新型的正轨螺旋环化衍生物的表征和评估 (34).
主要成果:
- 异构性化子单元增强了反应区域选择性,但稳定性降低了两倍.
- 类似物体表现出强烈的DNA化和显著的,虽然略有降低的细胞毒性活性 (IC50值在皮科莫拉范围).
- 一种独特的 орто-spirocyclized衍生物 (34) 显示了可比的DNA化效率,但降低了稳定性和功效.
结论:
- 结构修改可以微调二甲胺类同类的反应性和稳定性.
- 尽管化子单元发生变化,但DNA化选择性在很大程度上保持不变.
- 这些发现为这种类自然产品的DNA化和催化机制提供了宝贵的见解,指导了未来的药物开发.
相关概念视频
Combined Effects of Drugs: Synergism
Synergism is a useful mechanism where combining two or more drugs is more effective than each constituent used alone. Such combinations are also called supra-additive interactions. The drugs collectively enhance the final therapeutic effect by acting on different targets. Another advantage is that the low dose of each constituent drug is sufficient to achieve the desired effect. This helps reduce the duration of therapy and lower the adverse effects of these drugs.
Such synergistic combinations...
Such synergistic combinations...
Inhibitors of Bacterial Protein Synthesis
Aminoglycosides constitute a highly potent class of bactericidal antibiotics that exert their antimicrobial effects by targeting the bacterial ribosome, specifically disrupting protein synthesis. These polycationic molecules consist of amino-modified sugars linked via glycosidic bonds to an aminocyclitol core such as 2-deoxystreptamine or streptamine. Their strong positive charges facilitate tight binding to the negatively charged phosphate backbone of ribosomal RNA (rRNA), primarily at the 16S...
Inhibitors of Gram-positive Cell Wall Synthesis
Bacterial cell walls are typically rigid structures composed mainly of peptidoglycan, a mesh-like polymer that provides mechanical strength and maintains cell shape. The synthesis of peptidoglycan is a crucial process in bacterial growth and serves as a primary target for many antibiotics.Mechanism of Action of Beta-Lactam AntibioticsBeta-lactam antibiotics, such as penicillin, inhibit peptidoglycan synthesis in actively growing cells. These antibiotics share a characteristic four-membered...
Alkylation of β-Diester Enolates: Malonic Ester Synthesis
Malonic ester synthesis is a method to obtain α substituted carboxylic acids from ꞵ-diesters such as diethyl malonate and alkyl halides.
Antimicrobial Effectiveness
The effectiveness of antimicrobial agents depends on various factors influencing their ability to eliminate microbial populations. Larger microbial populations require more time for complete eradication, emphasizing the importance of population size analysis when evaluating antimicrobial efficacy.Microbial resistance to antimicrobial agents varies significantly. Highly resilient microorganisms include endospores, gram-negative bacteria, and non-enveloped viruses, while prions are exceptionally...
Production of Antibiotics
Penicillin, one of the earliest and most widely used antibiotics, is produced industrially by the filamentous fungus Penicillium chrysogenum. Large stirred-tank bioreactors ranging from tens to hundreds of thousands of liters maintain tightly controlled temperature, pH, and dissolved oxygen conditions to support fungal metabolism and maximize antibiotic yield. Penicillin is a secondary metabolite, synthesized primarily during the stationary growth phase, which requires a carefully managed...

