15-デオキシ-Δ12,14-プロスタグランジンJ2は,ヒトのマイクロ血管内皮細胞 (HMEC-1) でアポトーシスを誘導する
Hwa-Young Lee1,2, Young Il Kim3, Misong Kim4
1Department of Biomedical Science and Technology, Graduate School, Kyung Hee University, Seoul, 02447 Republic of Korea.
Toxicological research
|August 28, 2025
まとめ
15- デオキシ- Δ J2 (15d- PGJ2) は,ヒトの微小血管内皮細胞の成長とコロニー形成を阻害する. この化合物はまたアポトーシスを誘導し,NF-κBとPI3K/AKT/mTOR経路を抑制することによって細胞サイクル遺伝子発現を調節する.
科学分野:
- 分子生物学
- 細胞生物学
- 生物化学
背景:
- 15-デオキシ-Δ12,14-プロスタグランジンJ2 (15d-PGJ2) は,細胞増殖とアポトーシスの調節における役割として認識されています.
- 内皮細胞の機能は,マイクロ血管の健康と疾患において極めて重要です.
研究 の 目的:
- 15d-PGJ2がヒト微血管内皮細胞1系 (HMEC-1) の増殖とアポトーシスに及ぼす影響を調査する.
- 15d-PGJ2が核因子-カッパB (NF-κB) 活性とPI3K/AKT/mTORシグナル伝達経路を抑制するかどうかを決定する.
主な方法:
- 細胞増殖はMTS/PMSとコロニー形成アッセイで評価される.
- フローサイトメトリーを用いた細胞サイクル分析.
- 定量ポリメラーゼ連鎖反応 (qPCR) による遺伝子発現と,免疫ブロック分析によるタンパク質発現を定量化した.
主要な成果:
- 15d- PGJ2はHMEC-1細胞の成長とコロニー形成を有意に抑制した.
- 15d-PGJ2による治療は,細胞サイクルを調節する遺伝子発現を変化させ,p21を増加させながらCDK4/ 6とサイクリンD1を減少させた.
- 15d-PGJ2誘発のアポトーシスで,Bcl- 2が減少し,バックス,カスパース- 3およびカスパース- 9の発現が増加した.
- NF- kBとPI3K/ AKT/ mTOR経路のリン酸化抑制が観察されました.
結論:
- 15d- PGJ2は,HMEC-1細胞に対する抗増殖およびプロアポプトティックな効果を発揮する.
- この化合物は細胞サイクルとアポトーシスに関連する遺伝子発現を調節する.
- これらの効果は,NF- kBとPI3K/ AKT/ mTORのシグナル伝達経路の抑制によって媒介されます.
関連する概念動画
Apoptosis
11.9K
Apoptosis is a combination of two Greek words, 'apo' and 'ptosis,' meaning separation and falling off, respectively. Hippocrates used this word to describe gangrene, which was caused due to bandaging of fractured bones. Apoptosis was distinguished from necrosis in 1970 when John Kerr reported observations of morphological changes occurring during apoptosis. During one experiment, he observed that the disruption of blood supply to the liver tissue resulted in a size...
11.9K
The Extrinsic Apoptotic Pathway
6.6K
The extrinsic apoptotic pathway is initiated when extracellular death-inducing signals, such as specific cytokines, activate the death receptors expressed on the cell surface. The immune cells involved in this pathway are natural killer cells (NK cells) and cytotoxic T-lymphocytes. NK cells are critical in innate immune response, while cytotoxic T-lymphocytes are associated with adaptive immune response. These cells recognize specific receptors expressed on the altered cells and activate...
6.6K
Regulation of Angiogenesis and Blood Supply
2.7K
Rapidly dividing tumors, embryos, and wounded tissues require more oxygen than usual, lowering the oxygen concentration in the blood. At low oxygen or hypoxic conditions, an oxygen-sensitive transcription factor called the hypoxia-inducible factor 1 or HIF1 is activated. HIF1 is a dimeric protein of alpha (ɑ) and beta (β) subunits. Under optimal oxygen conditions, HIF1β is present in the nucleus while HIF1ɑ remains in the cytosol. HIF1ɑ is hydroxylated by prolyl...
2.7K
The Intrinsic Apoptotic Pathway
6.8K
Internal cellular stress, such as cellular injury or hypoxia, triggers intrinsic apoptosis. The B-cell lymphoma 2 (Bcl-2) family of proteins are the primary regulators of the intrinsic apoptotic pathway. For example, during DNA damage, checkpoint proteins, such as Ataxia Telangiectasia Mutated (ATM protein) and Checkpoints Factor-2 (Chk2) proteins, are activated. These proteins phosphorylate p53 which further activates pro-apoptotic proteins, such as Bax, Bak, PUMA, and Noxa, and inhibits...
6.8K
Antiplatelet Drugs: Prostaglandin Synthesis, P2Y12 and Glycoprotein IIb/IIIa Inhibitors
644
Antiplatelet drugs emerge as frontline defenders against the insidious threat of thromboembolic diseases, where abnormal clots obstruct vital blood vessels. These drugs stand as bulwarks, inhibiting platelet aggregation and clot formation, thereby mitigating the risk of life-threatening conditions like myocardial infarction, coronary artery disease, and thrombotic strokes.
Prostaglandin synthesis inhibitors, exemplified by the widely known aspirin, wield their power by irreversibly acetylating...
Prostaglandin synthesis inhibitors, exemplified by the widely known aspirin, wield their power by irreversibly acetylating...
644
Phagocytosis of Apoptotic Cells
4.0K
Cells undergoing apoptosis form apoptotic bodies that must be removed immediately to prevent inflammation, autoimmune diseases, and necrosis. Phagocytosis is carried out by professional phagocytes such as macrophages or immature dendritic cells. Non-professional phagocytes such as epithelial cells and fibroblasts also take part in this process; however, they are not as effective as professional phagocytes.
Normal cells contain receptors that prevent them from being recognized...
Normal cells contain receptors that prevent them from being recognized...
4.0K


