相关实验视频
Updated: Aug 20, 2026

10:44
Sex Stratified Neuronal Cultures to Study Ischemic Cell Death Pathways
Published on: December 9, 2013
以雌激素受体为媒介的抑制人类内皮细胞亡. 雌醇作为生存因素
I Spyridopoulos1, A B Sullivan, M Kearney
1Department of Medicine, St Elizabeth's Medical Center, Boston, Mass. 02135, USA.
Circulation
|March 18, 1997
概括
雌激醇 (E2) 保护内皮细胞免受瘤坏死因子-α (TNF-α) 诱导的亡. 这种保护作用是剂量依赖的,受体介导的,并表明E2.
科学领域:
- 内分泌学 在内分泌学.
- 细胞生物学 细胞生物学
- 心血管研究研究心血管研究
背景情况:
- 内皮细胞亡与各种血管病理有关.
- 瘤亡因子-α (TNF-α) 是已知的内皮细胞死亡诱导因子.
- 雌激醇 (E2) 正在研究其在内皮细胞中的潜在保护作用.
研究的目的:
- 检查雌激醇 (E2) 对TNF-α诱导的内皮细胞亡的保护能力.
- 为了研究介素-1β转化酶 (ICE) 途径在TNF-α诱导的亡中的作用.
- 为了确定E2的保护作用是否由雌激素受体介导.
主要方法:
- 人类静脉内皮细胞 (HUVEC) 暴露于TNF-alpha和/或E2.
- 用光和电子显微镜,光激活细胞分类 (FACS) 和生命力测试来评估亡.
- 对ICE的基因和蛋白质表达进行了分析,由北方和西部 blot.
- 免疫光染色被用来定位ICE表达.
- 使用雌激素受体对抗剂来阻止E2的作用.
主要成果:
- 在HUVEC中TNF-alpha诱导的亡,其特征是形态变化和ICE表达的增加.
- E2治疗显著降低了TNF-α诱导的亡,以剂量依赖的方式.
- 雌激素受体对抗剂取消了E2的保护作用,表明受体介导作用.
- 治疗E2可减少50%的细胞亡和约45%的细胞死亡.
结论:
- E2具有剂量依赖的,以雌激素受体为媒介的TNF-α诱导的内皮细胞亡的抑制作用.
- 通过防止因有害刺激引起的细胞死亡,E2可能在维持内皮完整性方面发挥关键作用.
- ICE途径与细胞因子诱导的内皮细胞亡有关,E2的保护作用可能涉及该途径.
- 通过E2保护内皮完整性,为其动脉保护作用提供了一个潜在的机制.
相关概念视频
Mitogens 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...
The Extrinsic Apoptotic Pathway
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...
Regulation of Angiogenesis and Blood Supply
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 hydroxylase and factor...

