相关实验视频
Updated: Jul 22, 2025

00:07
In Vivo Inhibition of MicroRNA to Decrease Tumor Growth in Mice
Published on: August 23, 2019
7.4K
STAG2 失活会重新编程 BRAF 突变甲状腺癌细胞的谷氨酸代谢
Xinru Li1,2, Yan Liu1, Juan Liu1
1Key Laboratory for Tumor Precision Medicine of Shaanxi Province and Department of Endocrinology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, 710061, PR China.
Cell death & disease
|July 21, 2023
概括
甲状腺癌中的STAG2下调不会影响BRAF突变细胞的增殖,但会增强对谷氨酸缺乏的敏感性. 这通过降低c-Myc的稳定性,损害谷氨酸代谢,并提供新的治疗策略来实现.
科学领域:
- 在瘤学瘤学.
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
背景情况:
- STAG2是凝聚复合体的一个关键子单元,对染色体分离至关重要.
- 突变性失活STAG2有助于在黑色素瘤中产生BRAF/MEK抑制剂耐药性.
- 在甲状腺癌中,STAG2的下调经常发生.
研究的目的:
- 研究STAG2在BRAF突变甲状腺癌中的作用.
- 探索STAG2对甲状腺癌细胞表型和药物敏感性的影响.
- 阐明STAG2在甲状腺癌代谢中的作用的基本机制.
主要方法:
- 在体外和体内研究,包括STAG2敲击实验.
- 评估细胞增殖,殖民地形成和瘤生成能力.
- 对MEK抑制剂,谷氨酸缺乏和谷氨酸酶抑制剂 (BPTES) 的敏感性分析.
- 通过ERK/AKT/GSK3β通路对c-Myc蛋白稳定性和下游代谢标 (SCL1A5,GLS,GLS2) 的研究.
主要成果:
- STAG2敲除并没有显著影响BRAF突变甲状腺癌细胞的增殖,殖民地形成或瘤性.
- STAG2倒置并没有改变这些细胞对MEK抑制剂的敏感性.
- STAG2敲击细胞对谷氨酸缺乏和谷氨酸酶抑制剂BPTES的敏感性增加.
- 通过降低SCL1A5,GLS和GLS2的调节,降低了c-Myc蛋白的稳定性,损害了谷氨酸代谢.
结论:
- 在BRAF突变甲状腺癌细胞中,STAG2的失活会重编程谷氨酸代谢.
- 这种重编程增强了细胞对谷氨胺酶抑制剂的反应.
- 向谷氨胺代谢是BRAF突变甲状腺癌的潜在治疗策略.
相关概念视频
mTOR Signaling and Cancer Progression
3.8K
The mammalian target of rapamycin or mTOR protein was discovered in 1994 due to its direct interaction with rapamycin. The protein gets its name from a yeast homolog called TOR. The mTOR protein complex in mammalian cells plays a major role in balancing anabolic processes such as the synthesis of proteins, lipids, and nucleotides and catabolic processes, such as autophagy in response to environmental cues, such as availability of nutrients and growth factors.
The mTOR pathway or the...
The mTOR pathway or the...
3.8K
Targeted Cancer Therapies
7.7K
The targeted cancer therapies, also known as “molecular targeted therapies,” take advantage of the molecular and genetic differences between the cancer cells and the normal cells. It needs a thorough understanding of the cancer cells to develop drugs that can target specific molecular aspects that drive the growth, progression, and spread of cancer cells without affecting the growth and survival of other normal cells in the body.
There are several types of targeted therapies against...
There are several types of targeted therapies against...
7.7K
The Retinoblastoma Gene
4.1K
Tumor suppressor genes are normal genes that can slow down cell division, repair DNA mistakes, or program the cells for apoptosis in case of irreparable damage. Hence, they play an essential role in preventing the proliferation of damaged cells.
The first-ever tumor suppressor gene called Rb was identified in retinoblastoma - a rare eye tumor in children. In inherited forms of the disease, a child inherits one defective copy of the Rb gene, which predisposes them to retinoblastoma. However,...
The first-ever tumor suppressor gene called Rb was identified in retinoblastoma - a rare eye tumor in children. In inherited forms of the disease, a child inherits one defective copy of the Rb gene, which predisposes them to retinoblastoma. However,...
4.1K
Cancer-Critical Genes II: Tumor Suppressor Genes
7.5K
Genes usually encode proteins necessary for the proper functioning of a healthy cell. Mutations can often cause changes to the gene expression pattern, thereby altering the phenotype.
When the function of certain critical genes, especially those involved in cell cycle regulation and cell growth signaling cascades, gets disrupted, it upsets the cell cycle progression. Such cells with unchecked cell cycles start proliferating uncontrollably and eventually develop into tumors.
Such genes that act...
When the function of certain critical genes, especially those involved in cell cycle regulation and cell growth signaling cascades, gets disrupted, it upsets the cell cycle progression. Such cells with unchecked cell cycles start proliferating uncontrollably and eventually develop into tumors.
Such genes that act...
7.5K
Abnormal Proliferation
4.6K
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...
4.6K
Loss of Tumor Suppressor Gene Functions
4.9K
Tumor suppressor genes are normal genes that can slow down cell division, repair DNA mistakes, or program the cells for apoptosis in case of irreparable damage. Hence, they play an essential role in preventing the proliferation of damaged cells.
When the tumor suppressor genes develop mutations or are lost, cells start growing out of control, leading to cancer. However, a single functional copy of the tumor suppressor gene is enough for the cells to maintain their normal functions and cell...
When the tumor suppressor genes develop mutations or are lost, cells start growing out of control, leading to cancer. However, a single functional copy of the tumor suppressor gene is enough for the cells to maintain their normal functions and cell...
4.9K

