相关实验视频
Updated: Jun 25, 2026
09:04
A Simple Bioassay for the Evaluation of Vascular Endothelial Growth Factors
Published on: March 15, 2016
瘤中v-erbA瘤基因的功能与其抑制视网膜酸受体作用的能力相关
1Department of Microbiology, University of California, Davis 95616.
Cell
|September 6, 1991
概括
鸟类红细胞母细胞瘤病毒的v-erbA蛋白干扰甲状腺激素和视网膜酸受体. 这种干扰不仅涉及甲状腺激素受体,还与甲状腺激素在瘤和阻断细胞分化中的作用相关.
科学领域:
- 分子生物学分子生物学
- 在瘤学瘤学.
- 病毒学 病毒学
背景情况:
- 源自鸟类红细胞母细胞瘤病毒的v-erbA瘤蛋白是一种经过修改的甲状腺激素受体.
- 它通过抑制红细胞分化和改变纤维细胞生长,与瘤有关.
- 假设v-erbA可以作为一种主导负性瘤基因,破坏正常的甲状腺激素受体活性.
研究的目的:
- 调查受v-erbA.影响的核受体范围.
- 为了确定与v-erbA的致癌功能相关的特定受体相互作用.
- 阐明v-erbA导致瘤的机制.
主要方法:
- 这项研究可能涉及体外测试,以评估v-erbA与各种核受体的相互作用.
- 功能性测试可能用于评估v-erbA对细胞分化和生长的影响.
- 进行了相关性分析,以将v-erbA的致癌潜力与其受体干扰能力联系起来.
主要成果:
- v-erbA对类固醇/视网类受体超级家族的多个成员产生干扰,而不仅仅是甲状腺激素受体.
- v-erbA的瘤活性与其干扰视网膜酸受体信号的干扰更强烈相关,而不是抑制c-erbA (甲状腺激素受体) 作用.
- v-erbA破坏正常细胞过程的能力与其与视网膜酸通路的相互作用有关.
结论:
- v-erbA的致癌机制涉及到对核受体信号通路的杂乱干扰.
- 与视网膜酸受体介导的分化干扰是v-erbA在瘤中扮演的关键因素.
- 这些发现表明,瘤发生的更广泛的机制包括视网体信号的破坏.
更多相关视频
相关概念视频
02:38Mitogens and the Cell Cycle
Mitogens and their receptors play a crucial role in controlling the progression of the cell cycle. However, the loss of mitogenic control over cell division leads to tumor formation. Therefore, mitogens and mitogen receptors play an important role in cancer research. For instance, the epidermal growth factor (EGF) - a type of mitogen and its transmembrane receptor (EGFR), decides the fate of the cell's proliferation. When EGF binds to EGFR, a member of the ErbB family of tyrosine kinase...
02:23Abnormal Proliferation
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 daughter...
01:12Loss of Tumor Suppressor Gene Functions
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...
01:20The Retinoblastoma Gene
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,...
01:15Receptor Downregulation in MVBs
Multivesicular bodies (MVBs) are mature endosomes that sort ubiquitinated proteins and then fuse with lysosomes to degrade the sorted proteins. Epidermal growth factor (EGF) and its receptor (EGFR) form a complex that can be internalized through endocytosis, sorted into an MVB, and later degraded.
The EGFR can initiate signaling pathways that lead to cell proliferation, migration, and differentiation. Overexpression of EGFR stimulates cells to proliferate. Excessive EGFR activation may...
The EGFR can initiate signaling pathways that lead to cell proliferation, migration, and differentiation. Overexpression of EGFR stimulates cells to proliferate. Excessive EGFR activation may...
01:20The Retinoblastoma Gene
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,...