A redox-responsive supramolecular nanocarrier was constructed from the self-assembly of spermine modified cyclodextrin and oxaliplatin prodrug. The nanocarrier could preferentially accumulate in polyamine transporter over-expressing HCT116 cells, releasing drugs under a reducing intracellular environment to maximize anticancer treatment.
Cisplatin−DNA Cross-Link Retro Models with a Chirality-Neutral Carrier Ligand: Evidence for the Importance of “Second-Sphere Communication”
作者:Sharon T. Sullivan、Antonella Ciccarese、Francesco P. Fanizzi、Luigi G. Marzilli
DOI:10.1021/ic000736x
日期:2001.1.1
forms) with both G H8 signals unusually downfield encouraged us to study additional Me2ppzPtG2 analogues in order to explain the unusual spectral features and to identify factors that influence the relative stability of HT and HH forms. Molecular modeling techniques suggest HH structures with the H8's close to the deshielding region of the z axis of the magnetically anisotropic Pt atom, explaining
Thermodynamic and Kinetic Studies on Reactions of Pt(II) Complexes with Biologically Relevant Nucleophiles
作者:Nadine Summa、Wolfgang Schiessl、Ralph Puchta、Nico van Eikema Hommes、Rudi van Eldik
DOI:10.1021/ic051955r
日期:2006.4.1
coordinated water molecules by a series of nucleophiles (viz., thiourea (tu), L-methionine (L-Met), and guanosine-5'-monophosphate (5'GMP-) was investigated under pseudo-first-order conditions as a function of concentration, temperature, and pressure using UV-vis spectrophotometric and stopped-flow techniques and was found to occur in two subsequent reaction steps. The following k1 values for Pt(dach)
Copper carbenes alkylate guanine chemoselectively through a substrate directed reaction
作者:Stefanie N. Geigle、Laura A. Wyss、Shana J. Sturla、Dennis G. Gillingham
DOI:10.1039/c6sc03502g
日期:——
Cu(I) carbenes derivedfrom α-diazocarbonyl compounds lead to selective alkylation of the O6 position in guanine (O6-G) in mono- and oligonucleotides. Only purine-type lactam oxygens are targeted – other types of amides or lactams are poorly reactive under conditions that give smooth alkylation of guanine. Mechanistic studies point to N7G as a directing group that controls selectivity. Given the importance
衍生自 α-重氮羰基化合物的 Cu() 卡宾可导致单核苷酸和寡核苷酸中鸟嘌呤 (O 6 -G) 中 O 6位的选择性烷基化。只有嘌呤型内酰胺氧是目标——其他类型的酰胺或内酰胺在鸟嘌呤顺利烷基化的条件下反应性较差。机理研究表明 N7G 作为控制选择性的指导基团。鉴于O 6 -G加合物在生物学和生物技术中的重要性,我们预计Cu()催化的O 6 -G烷基化将成为广泛使用的合成工具。虽然过渡金属增加氧化还原损伤的倾向已得到广泛认可,但我们的结果表明过渡金属也可能增加核酸对烷基化损伤的脆弱性。
New methods for functionalizing biologically important molecules using triosmium metal clusters
作者:Edward Rosenberg、Rakesh Kumar
DOI:10.1039/c1dt11173f
日期:——
recent work on the interactions of the triosmiumclusters of general formula Os3(CO)9(μ3-η2-L-H)(μ-H) (L = bicyclic benzoheterocycle) with DNA and proteins. The early work focused on how the structure of the benzoheterocycle influenced the binding of the cluster to plasmid DNA, albumin and the inhibition of telomerase. Later, selective binding of the triosmiumclusters to guanine was targeted using a range
该观点报告总结了有关 os 通式簇 OS 3(CO)9(μ 3 -η 2 -LH)(μ-H) (L =双环 苯并杂环)与DNA和蛋白质。早期的工作重点是苯并杂环影响簇与质粒DNA,白蛋白的结合以及端粒酶的抑制。后来,选择性地结合了os 集群到 鸟嘌呤使用一系列烷基化官能团作为目标。结合这些努力,将介绍一些近期未出版的作品。将讨论该领域未来方向的建议以及所遇到的问题和困难的摘要。