オキシリプラチンおよびデリバティブによる核ストレス誘導
Journal of the American Chemical Society
|November 1, 2019
まとめ
特定のプラチナ (II) 化合物は,DNA損傷ではなく,核ストレスによって癌細胞死を誘発する. このプロセスの鍵となるのは,リガンド特性,特にダイアミノサイクロヘキサン環の方向性である.
科学分野:
- 薬剤化学
- 癌 生物学
- 分子薬理学
背景:
- プラチナ (II) 化合物は重要な化学療法薬である.
- オクサリプラチンなどのプラチナ (II) 剤は,シスプラチンなどのDNA損傷反応とは異なり,核ストレスによる癌細胞死を引き起こす.
研究 の 目的:
- 核ストレスを引き起こすプラチナ (II) 化合物の特性を調査する.
- ニュクレオフォスミン (NPM1) 再分配をバイオマーカーとして使用してプラチナ (II) 誘発の核分子の構造的決定因子を特定する.
主な方法:
- プラチナ (II) 化合物に対する反応として,ヌクレオフォスミン (NPM1) の再分布を測定する試験.
- NPM1の再配分と,測定された化合物特性,サイズと水害性との相関.
- NPM1の再分配への影響を評価するために,プラチナ (II) 化合物のリガンドを体系的に改変する.
主要な成果:
- オキシリプラチンのオキシラート離脱グループは,NPM1の再分配を誘導するために不可欠ではありません.
- ダイアミノサイクロヘキサン (DACH) リガンドのリングサイズと芳香性は,NPM1の再配分を廃止することなく変更できます.
- DACHリガンドリングの方向性は,核ストレス誘発に極めて重要です.
結論:
- プラチナ (II) 化合物による核ストレス誘導は,プラチナ核だけでなく,特定のリガンド構造特性に依存する.
- ダイアミノサイクロヘキサン (DACH) リガンドの方向性は,核ストレス経路の活性化に決定的な決定因子です.
- これらのリガンド特異的要件を理解すると,特定のプラチナ (II) 化学療法薬の選択性細胞毒性に関する洞察が得られます.
関連する概念動画
02:55The Nucleolus
10.2K
The nucleolus is the most prominent substructure of the nucleus. When it was first discovered, it was considered to be an isolated organelle that forms fibrils and granules. In 1931, the relationship between the nucleolus and chromosomes was first described by Heitz. He observed that the appearance and size of nucleolus varies depending on the stage of the cell cycle. He also noticed constricted regions on different chromosomes clustered together at definite cell cycle stages. These regions,...
10.2K
01:15Drugs that Stabilize Microtubules
2.6K
Microtubules are dynamic structures that undergo cycles of catastrophe and rescue. The microtubules play a central role in cell division by forming the spindle apparatus for segregating the chromosomes. This makes them ideal targets for regulating dividing cells in tumors and malignant cancer cells. Microtubule stabilizing drugs help stabilize the microtubule formation and promote its polymerization. Paclitaxel was the first microtubule stabilizing agent used as anticancer drug in chemotherapy...
2.6K
01:10Drugs that Destabilize Microtubules
3.6K
Microtubules are dynamic structures and can be regulated by microtubule targeting agents (MTAs). Microtubule destabilizing drugs are a class of MTAs that destabilize and prevent microtubules' polymerization. Both natural and synthetic chemicals can be found under this class of drugs. Vincristine and vinblastine, two vinca alkaloids, and colchicine were among the first to be discovered. These drugs can affect cells in various ways, either by inducing a change in cell morphology, preventing...
3.6K
02:36DNA Damage Can Stall the Cell Cycle
3.0K
In response to DNA damage, cells can pause the cell cycle to assess and repair the breaks. However, the cell must check the DNA at certain critical stages during the cell cycle. If the cell cycle pauses before DNA replication, the cells will contain twice the amount of DNA. On the other hand, if cells arrest after DNA replication but before mitosis, they will contain four times the normal amount of DNA. With a host of specialized proteins at their disposal,cells must use the right protein at...
3.0K
01:38Nucleotide Excision Repair
4.9K
DNA Distortion and Damage
Cells are regularly exposed to mutagens—factors in the environment that can damage DNA and generate mutations. UV radiation is one of the most common mutagens and is estimated to introduce a significant number of changes in DNA. These include bends or kinks in the structure, which can block DNA replication or transcription. If these errors are not fixed, the damage can cause mutations, which in turn can result in cancer or disease depending on which sequences are...
Cells are regularly exposed to mutagens—factors in the environment that can damage DNA and generate mutations. UV radiation is one of the most common mutagens and is estimated to introduce a significant number of changes in DNA. These include bends or kinks in the structure, which can block DNA replication or transcription. If these errors are not fixed, the damage can cause mutations, which in turn can result in cancer or disease depending on which sequences are...
4.9K