通过使用内部化双光子激活分子纳米机的IV型光动力学疗法进行编程细胞死亡
Thomas S Bradford1, Dongdong Liu2, James M Tour3
1Department of Chemistry, Durham University, South Road, Durham DH1 3LE, United Kingdom.
ACS applied bio materials
|October 13, 2025
概括
直接光动力学疗法 (PDT) 使用分子纳米机器 (MNM) 来消除癌细胞. 这种新的方法避免了活性氧物种 (ROS),并提供可调节的细胞死亡机制,以更安全地治疗癌症.
科学领域:
- 生物医学工程 生物医学工程
- 纳米技术纳米技术
- 癌症治疗 癌症治疗
背景情况:
- 直接光动力疗法 (PDT) 是一种新兴的癌症治疗选择.
- 与间接的PDT不同,直接的PDT利用光敏剂 (PS) 直接损害癌细胞,避免活性氧物种 (ROS).
- 之前的研究引入了近红外光激活的分子纳米机器 (MNM) 用于通过膜破坏进行细胞特异性亡.
研究的目的:
- 扩大对癌症治疗的MNMs的先前工作.
- 研究MNM的修改,以提高细胞吸收和向线粒体定位.
- 通过光激活的MNMs来证明一种通过光激活的MNMs诱导编程细胞死亡 (PCD) 的新机制.
主要方法:
- 用聚乙烯糖醇 (PEG) 或三 (TPP+) 功能组合成了经过修改的MNMs.
- 评估了修饰的MNM的细胞吸收和线粒体局部化.
- 进行光诱导的MNM激活,以评估细胞死亡机制 (死与PCD).
主要成果:
- PEG和TPP+的修改使MNMs能够穿越脂双层并定位在线粒体膜上.
- 在不损害细胞膜完整性的情况下,MNM激活诱导了编程细胞死亡 (PCD).
- 同样的MNM技术可以通过改变激发过程来诱导死或PCD细胞死亡.
结论:
- 修改后的MNM为向癌症治疗提供了一个有前途的平台.
- 这项技术使可调节的细胞死亡诱导成为可能,提供了更清洁的治疗方法.
- 光激活的MNM代表了癌症治疗的重大进步,提供了多功能细胞消除策略.
关键词:
2PE 2PE 2PE 2PE 2PE 2PE 2PE 2PE 2PE 2PE 2PE 2PE 2PE 2PE 2PE 2PE 2PE 2PE 2PE 2PE在 MNMM 中,MNM 是 MNM.在NIR中激活NIR激活.在PDT中使用PDT.多光子多光子纳米机器是什么意思更多相关视频
11:04An In-House-Built and Light-Emitting-Diode-Based Photodynamic Therapy Device for Enhancing Verteporfin Cytotoxicity in a 2D Cell Culture Model
Published on: January 13, 2023
3.6K
09:45Photodynamic Therapy with Blended Conducting Polymer/Fullerene Nanoparticle Photosensitizers
Published on: October 28, 2015
8.8K
相关概念视频
Overview of Cell Death
9.2K
Cell death is an essential process where the body gets rid of old or damaged cells. Cell proliferation and death need to be balanced, as an imbalance between the two may lead to cancer or autoimmune diseases.
Cell death was observed in the early 19th century, but there was no experimental evidence to prove it. In 1842, Carl Vogt first discovered cell death in a metamorphic toad; however, it was not termed ‘cell death.’ Scientists discovered different cell death pathways only in the...
Cell death was observed in the early 19th century, but there was no experimental evidence to prove it. In 1842, Carl Vogt first discovered cell death in a metamorphic toad; however, it was not termed ‘cell death.’ Scientists discovered different cell death pathways only in the...
9.2K
Autophagic Cell Death
4.3K
Christian de Duve discovered “autophagy,” a process in which cellular components are engulfed by membrane-bound organelles called autophagosomes. The autophagosomes then fuse with lysosomes to digest the enclosed contents. Autophagy is generally activated in cells to prevent cell death. However, cell death is triggered when the damage is beyond repair.
Autophagy and Apoptosis
Autophagy can activate apoptosis. In normal conditions, the autophagy activating protein Beclin-1 and...
Autophagy and Apoptosis
Autophagy can activate apoptosis. In normal conditions, the autophagy activating protein Beclin-1 and...
4.3K
Apoptosis
13.8K
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...
13.8K
The Extrinsic Apoptotic Pathway
7.9K
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...
7.9K
The Intrinsic Apoptotic Pathway
8.1K
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...
8.1K
