空間時的アポトーシス誘導のための分子接着剤によるカスパース-3の細胞内光活性化
PubMedで要約を見る
まとめ
この要約は機械生成です。新しい分子接着剤であるPC-Glueは,アポトーシス誘発酵素Casp-3 (Casp-3) を細胞に放出する. 発光するとCasp-3が放出され 標的細胞のプログラム細胞死亡を 精密に制御できます
科学分野
- 生物化学
- 細胞生物学
- 分子工学
背景
- カスパース3 (Casp-3) は,プログラムされた細胞死亡の重要なプロセスであるアポトーシスを開始する重要な酵素です.
- 細胞研究および治療において,Casp- 3の標的型投与と制御された活性化が,正確なアポトーシス誘導に不可欠である.
研究 の 目的
- 細胞内カスパース-3 (Casp-3) の新しい配送システムを開発する.
- アポトーシスの時空誘導のためのCasp-3の光制御活性化を達成するために.
主な方法
- グアニジニウム (Gu+) のペンダントと光分解性結合を持つデンドリート分子接着剤 (PC-Glue) を合成した.
- PC- Glueは,直接プラズマ膜に浸透し,Casp- 3を細胞質に結合させました.
- アポトーシスは,紫外線または2フォトンの近赤外線 (NIR) 曝露によって誘発され,PC-Glueが割れ,Casp-3が解放されました.
主要な成果
- PC-Glueは,Casp-3を細胞質に投与し,その酵素活性を隠しました.
- UVまたはNIR光による光活性化により,有効なCasp-3が効率的に放出されます.
- Casp-3媒介によるアポトーシスに対する空間時間的制御は,照射された細胞で達成された.
結論
- PC-Glueは,細胞内伝達と光制御されたカスパース-3の活性化のための効果的なプラットフォームとして機能します.
- このアプローチは,アポトーシスの精密な時空誘導を可能にし,先進的な細胞研究と治療の可能性を秘めています.
関連する概念動画
Caspase, a family of cysteine proteases, serve as effectors in apoptosis. The ced3 gene in C.elegans was first identified to be involved in apoptosis. This gene encodes the ced-3 caspase that is similar to the interleukin-1-beta converting enzyme or ICE in mammals. In addition to apoptosis, caspases also function in the inflammatory response. Inflammatory caspases are essential in activating pro-inflammatory cytokines that recruit immune cells and block the replication of pathogens inside...
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...
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...
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...
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...

