溶液结构,氧化性DNA损伤,生物活性和三元铜的分子对接 (II) L-酸复合物
Agnieszka Wojciechowska1, Romualda Bregier Jarzębowska2, Urszula K Komarnicka3
1Faculty of Chemistry, Wrocław University of Science and Technology, Wyb. Wyspiańskiego 27, 50-370, Wrocław, Poland.
Biochimie
|November 19, 2024
概括
新的铜复合物含有2.2'-双氨酸 (bpy) 和L-氨酸,对癌细胞具有选择性毒性. 这些金属药物表明DNA损伤和抗增殖作用,为向癌症治疗提供了潜在的潜力.
科学领域:
- 无机化学 无机化学 有机化学
- 药用化学 医学化学
- 生物化学 生物化学
背景情况:
- 目前正在寻找具有针对癌细胞而不是正常细胞的选择性毒性金属制药.
- 含有特定辅配体的铜 (II) 化合物正在研究其潜在的抗癌特性.
研究的目的:
- 为了评估新型铜 (II) 化合物的DNA相互作用,细胞毒性和抗增殖活性,该化合物具有2,2-双氨酸 (bpy) 作为辅配体.
- 为了比较这些含有bpy的铜复合物的疗效,与含有1,10-phenanthroline (phen) 和 thiocyanate (SCN-) 辅配体的类似化合物进行比较.
- 阐明合成的铜复合物的DNA损伤和结合相互作用的机制.
主要方法:
- 使用电位计,X波段EPR和UV-Vis光谱学进行结构性表征.
- 在过氧化的存在下通过凝电泳评估DNA损伤.
- 在体外对A549和HepG2癌细胞系和正常细胞的细胞毒性和抗增殖活性的评估.
- 循环电压测量以确认氧化还原活性和分子对接以预测复杂受体相互作用.
主要成果:
- 铜 (II) 复合物[Cu-μ-O,O-NO3) L-Arg (bpy) ]NO3}n (1) 和[CuCl (L-Arg) ]Cl·3H2O (2) 的合成和特征.
- 与正常细胞相比,化合物1和2诱导了DNA损伤,并表现出针对癌细胞的选择性细胞毒性和抗增殖作用.
- 含有bpy的复合物与以前研究的含有和SCN的铜化合物相比,显示出类似或增强的活性.
结论:
- 含有2,2-双和L-氨酸的铜 (II) 复合物由于其选择性毒性和DNA损伤能力,显示出作为抗癌剂的巨大潜力.
- 这些发现支持开发针对癌细胞的基于金属的新型治疗方法.
- 对结构-活性关系和体内疗效的进一步研究是有必要的.
相关概念视频
02:51Metal-Ligand Bonds
20.6K
The hemoglobin in the blood, the chlorophyll in green plants, vitamin B-12, and the catalyst used in the manufacture of polyethylene all contain coordination compounds. Ions of the metals, especially the transition metals, are likely to form complexes.
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
20.6K
01:22EDTA: Chemistry and Properties
1.8K
Polydentate ligands are most widely used in complexometric titrations because they form more stable complexes with the metal ions than mono- or bidentate ligands due to the chelate effect. Examples of polydentate ligands are ethylenediaminetetraacetic acid (EDTA), crown ethers, and cryptands. The most important feature of optimal polydentate ligands is the ability to form 1:1 complexes in a single-step process. Amino carboxylic acid derivatives are frequently used as complexing agents. EDTA is...
1.8K
01:19Complexation Equilibria: The Chelate Effect
463
In complexation reactions, metal atoms or cations interact with ligands to form donor-acceptor adducts called metal complexes. Ligands that bind through one donor site are monodentate, ligands with two donor sites are bidentate, and those with more than two donor sites are polydentate ligands. For example, ethylene diamine is a bidentate ligand that binds through two nitrogen donor atoms, forming a five-membered ring. EDTA is a polydentate ligand that binds through four oxygen and two nitrogen...
463
01:26EDTA: Auxiliary Complexing Reagents
555
EDTA titrations are usually carried out in highly basic conditions, where the fully deprotonated form of EDTA, Y4−, actively complexes with the free metal ions in the solution. Several metal ions precipitate as hydrous oxide (hydroxides, oxides, or oxyhydroxides) under these conditions, lowering the concentration of free metal ions in the solution. For this reason, auxiliary complexing agents or ligands such as ammonia, tartrate, citrate, or triethanolamine are used in EDTA titrations to...
555
01:09Complexation Equilibria: Factors Influencing Stability of Complexes
343
In complexation reactions, metal cations are the electron pair acceptors, and the ligands are the electron pair donors. The stability of the metal complexes depends primarily on the complexing ability of the central metal ion and the nature of the ligands. Generally, the complexing ability of the metal ion depends on the size and charge of the ion. As the metal ion size increases, the stability of the metal complexes decreases, provided that the valency of the metal ion and the ligands remain...
343
00:43Complexometric Titration: Ligands
916
Different monodentate and polydentate ligands are used as complexing agents in complexometric titration reactions. The formation of complexes by mono- and bidentate ligands involves two or more intermediate steps, limiting their use as complexing agents. In comparison, polydentate ligands can form complexes with metal ions in a single-step process, facilitating sharper end points. This means polydentate ligands, such as amino carboxylic acid derivatives, are most commonly employed in...
916