相关实验视频
Updated: Jun 30, 2025

08:01
The Soft Agar Colony Formation Assay
Published on: October 27, 2014
111.7K
在EGFRL858R诱导的肺癌进展过程中,PTEN降低NR2F1的表达,以抑制纤维生成
Thi Thanh Truc Tran1, Jan-Jong Hung2
1Department of Biotechnology and Bioindustry Sciences, National Cheng Kung University, Tainan, Taiwan.
Cell death & disease
|March 19, 2024
概括
瘤抑制剂PTEN通过差异调节EGFR驱动的肺癌. 失去PTEN通过NR2F1通过升高调节纤维生成基因促进支气管增生,而PTEN在KRAS突变肺癌中起着瘤基因的作用.
科学领域:
- 在瘤学瘤学.
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
背景情况:
- 肺癌是全球主要的死亡原因之一.
- 像PTEN这样的瘤抑制剂对于预防癌症形成至关重要.
- 在EGFR突变肺癌中PTEN的作用需要进一步阐明.
研究的目的:
- 研究PTEN在表皮生长因子受体 (EGFR) L858R诱导的肺癌中的功能.
- 探索PTEN对肺癌进展影响的分子机制.
- 确定PTEN在各种肺癌基因组背景中的差异性作用.
主要方法:
- 在体内小鼠模型中,EGFRL858R诱导的肺癌具有或没有PTEN.
- 用于基因表达分析的RNA测序 (RNA-seq).
- 在不同肺癌细胞系中分析AKT酸化.
主要成果:
- 失去PTEN导致支气管细胞增多和上调生基因 (例如,Mucin5A,DNAI2,DNAI3) 在EGFRL858R肺癌.
- PTEN对转录因子NR2F1进行负面调节,该转录因子控制着纤毛发育的基因表达.
- PTEN表现出双重作用:EGFRL858R-突变细胞中的瘤抑制剂和KRAS-突变细胞中的潜在瘤基因,不同的影响AKT酸化.
结论:
- 在EGFRL858R诱导的肺癌中,PTEN充当双刃剑,其功能取决于基因组背景.
- PTEN通过NR2F1调节纤维生成是支气管增生的一个关键机制.
- 了解PTEN的上下文依赖作用对于开发向性肺癌疗法至关重要.
相关概念视频
Mitogens and the Cell Cycle
6.5K
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...
6.5K
Regulation of Angiogenesis and Blood Supply
2.6K
Rapidly dividing tumors, embryos, and wounded tissues require more oxygen than usual, lowering the oxygen concentration in the blood. At low oxygen or hypoxic conditions, an oxygen-sensitive transcription factor called the hypoxia-inducible factor 1 or HIF1 is activated. HIF1 is a dimeric protein of alpha (ɑ) and beta (β) subunits. Under optimal oxygen conditions, HIF1β is present in the nucleus while HIF1ɑ remains in the cytosol. HIF1ɑ is hydroxylated by prolyl...
2.6K
PI3K/mTOR/AKT Signaling Pathway
3.5K
The mammalian target of rapamycin (mTOR) is a serine/threonine kinase that regulates growth, proliferation, and cell survival in response to hormones, growth factors, or nutrient availability. This kinase exists in two structurally and functionally distinct forms: mTOR complex 1 (mTORC1) and mTOR complex 2 (mTORC2). The first form (mTORC1) is composed of a rapamycin-sensitive Raptor and proline-rich Akt substrate, PRAS40. In contrast, mTORC2 consists of a...
3.5K
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
Role of Ephrin-Eph Signalling in Intestinal Stem Cell Renewal
2.2K
Erythropoietin-producing hepatocellular carcinoma receptor (Eph) and its ligand, Eph receptor-interacting protein (Ephrin) were first discovered in the human carcinoma cell line, hence the name. Ephrin-Eph interaction guides cells to reach their appropriate location in adult tissues. They also play an essential role in the immune system by helping in immune cell migration, adhesion, and activation. Based on their structure and function, Eph is divided into two classes — EphA and EphB.
2.2K
Catenins
2.3K
Catenins are characterized by multiple binding domains and dynamic structures that allow them to function as linker proteins in cell junction complexes. All catenins, except α-catenin, contain a characteristic protein sequence called the armadillo repeat and are therefore also called armadillo proteins.
Catenins in Cell Junctions
Catenins bind to cell adhesion molecules such as cadherins and link them to different cytoskeletal proteins depending on the type of cell junction. At the...
Catenins in Cell Junctions
Catenins bind to cell adhesion molecules such as cadherins and link them to different cytoskeletal proteins depending on the type of cell junction. At the...
2.3K

