相关实验视频
Updated: Jan 11, 2026

10:55
Purification of Ubiquitinated p53 Proteins from Mammalian Cells
Published on: March 21, 2022
2.7K
通过使用纳米体合酶系统对p53进行向酸化来调节细胞状态
Hoe Eun Lim1, Hae Yong Yoo2,3
1Department of Health Sciences and Technology, Samsung Advanced Institute for Health Sciences and Technology, Sungkyunkwan University, Seoul, Republic of Korea.
Cell death discovery
|November 10, 2025
概括
研究人员开发了一种化目标蛋白 (TPP) 系统,通过化像p53.3这样的关键蛋白质来控制细胞行为. 该系统通过抑制瘤生长和增强药物疗效,对癌症治疗具有前景.
科学领域:
- 分子生物学分子生物学
- 细胞生物学 细胞生物学
- 生物化学 生物化学
背景情况:
- 酸化对细胞信号传递至关重要,影响诸如增殖,分化和亡等过程.
- 了解酸化的调节机制是开发新治疗策略的关键.
- 不调节的酸化与各种疾病有关,这突显了需要精确的控制机制的需要.
研究的目的:
- 开发和验证一种新的化目标蛋白 (TPP) 系统,以精确控制蛋白质化.
- 调查TPP系统对酸化目标蛋白质和调节细胞特征的能力.
- 探索TPP系统在癌症模型中的治疗潜力.
主要方法:
- 开发一个TPP系统,包括一个纳米体与酶域融合.
- 使用GFP作为模型基质验证系统的酸化活性.
- 分析p53酸化位点和对细胞循环和生长的下游影响.
- 在体外与化疗药物 (5-Fluorouracil,Oxaliplatin) 的结合研究.
- 在肠直肠癌异种移植小鼠模型中使用多西环素诱导TPP系统进行体内评估.
主要成果:
- 该TPP系统成功化了GFP,并在确定的地点特别准了p53.
- 酸化p53导致蛋白质稳定,增加p21表达,细胞周期延迟和抑制细胞生长.
- 结合TPP系统和化疗显著提高了结直肠癌细胞中的细胞毒性.
- 在没有外部刺激的情况下,TPP系统诱导了DNA受损的细胞状态.
- 在体内,多西环素诱导的TPP表达明显抑制了异种移植模型中的瘤生长.
结论:
- TPP系统提供了一种针对蛋白质酸化和细胞状态调节的新方法.
- 这项技术在研究酸化依赖性途径和开发治疗酸化相关疾病方面提供了潜在的应用.
- TPP系统在癌症治疗方面具有显著的潜力,无论是作为独立疗法还是与现有的化疗药物结合使用.
相关概念视频
Interactions Between Signaling Pathways
7.2K
Signaling cascades usually lack linearity. Multiple pathways interact and regulate one another, allowing cells to integrate and respond to diverse environmental stimuli.
Convergence and divergence, and cross-talk between signaling pathways
Two distinct signaling pathways can converge on a single functional unit, which may either be a single protein or a complex of proteins. The response is either functionally distinct or synergistic between the two pathways but different from the response...
Convergence and divergence, and cross-talk between signaling pathways
Two distinct signaling pathways can converge on a single functional unit, which may either be a single protein or a complex of proteins. The response is either functionally distinct or synergistic between the two pathways but different from the response...
7.2K
Abnormal Proliferation
5.1K
Under normal conditions, most adult cells remain in a non-proliferative state unless stimulated by internal or external factors to replace lost cells. Abnormal cell proliferation is a condition in which the cell's growth exceeds and is uncoordinated with normal cells. In such situations, cell division persists in the same excessive manner even after cessation of the stimuli, leading to persistent tumors. The tumor arises from the damaged cells that replicate to pass the damage to the...
5.1K
Negative Regulator Molecules
38.2K
Positive regulators allow a cell to advance through cell cycle checkpoints. Negative regulators have an equally important role as they terminate a cell’s progression through the cell cycle—or pause it—until the cell meets specific criteria.
38.2K
Covalently Linked Protein Regulators
8.6K
Proteins can undergo many types of post-translational modifications, often in response to changes in their environment. These modifications play an important role in the function and stability of these proteins. Covalently linked molecules include functional groups, such as methyl, acetyl, and phosphate groups, and also small proteins, such as ubiquitin. There are around 200 different types of covalent regulators that have been identified.
These groups modify specific amino acids in a protein....
These groups modify specific amino acids in a protein....
8.6K
DNA 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
DNA Damage can Stall the Cell Cycle
9.9K
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...
9.9K

