调整cis-platinum的DNA反应性:与特定不匹配的金属间接器结合
Anne Petitjean1, Jacqueline K Barton
1Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA 91125, USA.
Journal of the American Chemical Society
|November 13, 2004
概括
一种新的-化合物针对DNA不匹配. 这种双功能复合体引导白金与DNA错误附近结合,形成潜在的治疗应用的独特交叉链接.
科学领域:
- 药用化学 医学化学
- 分子生物学分子生物学
- 纳米技术纳米技术
背景情况:
- 西斯相似物是有效的化疗药物,但缺乏DNA序列选择性.
- 由于它们在基因组不稳定性中的作用,DNA不匹配是癌症治疗的关键目标.
- 开发针对DNA结合剂的向药物递送系统仍然是一个重大挑战.
研究的目的:
- 合成和描述一种新型的双金属合物,将一个间调和一个Cis-类似物连接在一起.
- 为了研究这种结合物的DNA结合位选择性,使用不匹配和匹配的寡核酸.
- 探索这种双功能复合物的潜力,以首选准DNA不匹配.
主要方法:
- 制备一种新型双金属合物,其中包括一个介声器和一个Cis-类型.
- 使用不同序列的不匹配和匹配的DNA寡核酸的位置选择性研究.
- 对协调 adduct 形成进行分析,以确定的结合点.
主要成果:
- 双金属复合体证明了在DNA不匹配部位附近的中心的有针对性的结合.
- 两者内链和内链交叉连接的 adducts 都是与不匹配的 DNA 形成的.
- 间隔器对DNA不匹配的识别指导了白金单元的反应,调整了其协调偏好.
结论:
- 这种新型的-联体成功地准了DNA不匹配,比传统的剂提供了更好的位点选择性.
- 双功能设计使得间调器能够引导白金部分到特定的DNA病变.
- 这种方法代表了开发更有效,更有针对性的DNA损伤癌症治疗方法的有希望的策略.
相关概念视频
Mismatch Repair
Overview
Translesion DNA Polymerases
Translesion (TLS) polymerases rescue stalled DNA polymerases at sites of damaged bases by replacing the replicative polymerase and installing a nucleotide across the damaged site. Doing so, TLS allows additional time for the cell to repair the damage before resuming regular DNA replication.
TLS polymerases are found in all three domains of life - archaea, bacteria, and eukaryotes. Of the different classes of TLS polymerases, members of the Y family are fitted with specialized structures that...
TLS polymerases are found in all three domains of life - archaea, bacteria, and eukaryotes. Of the different classes of TLS polymerases, members of the Y family are fitted with specialized structures that...
Mismatch Repair
Organisms are capable of detecting and fixing nucleotide mismatches that occur during DNA replication. This sophisticated process requires identifying the new strand and replacing the erroneous bases with correct nucleotides. Mismatch repair is coordinated by many proteins in both prokaryotes and eukaryotes.
The Mutator Protein Family Plays a Key Role in DNA Mismatch Repair
The human genome has more than 3 billion base pairs of DNA per cell. Prior to cell division, that vast amount of genetic...
The Mutator Protein Family Plays a Key Role in DNA Mismatch Repair
The human genome has more than 3 billion base pairs of DNA per cell. Prior to cell division, that vast amount of genetic...


