相关实验视频
Updated: Jun 11, 2025
10:15
Isolation and Culture Expansion of Tumor-specific Endothelial Cells
Published on: October 14, 2015
11.2K
针对内皮Rap1B,以克服癌症中的血管免疫抑制
Behshid Ghadrdoost Nakhchi1, Ramoji Kosuru1, Magdalena Chrzanowska1,2,3,4
1Versiti Blood Research Institute, Milwaukee, WI 53226, USA.
International journal of molecular sciences
|September 28, 2024
概括
拉普1B蛋白质是瘤血管功能障碍和免疫逃避的关键. 抑制Rap1B可以通过恢复免疫细胞透和减少瘤生长来增强癌症免疫疗法.
科学领域:
- 在瘤学瘤学.
- 免疫学 免疫学 免疫学
- 血管生物学 血管生物学
背景情况:
- 瘤微环境具有异常的血管系统,由血管内皮生长因子A (VEGF-A) 驱动,促进内皮无力和血管免疫抑制.
- 内皮无机阻碍了细胞毒性CD8+T细胞的透,限制了癌症免疫疗法的疗效.
- 目前的抗血管性疗法面临着系统性毒性和对内皮无能症的有效性有限的挑战.
研究的目的:
- 调查小GTPase Rap1B在内皮细胞 (EC) 内VEGF-A信号传递中的作用.
- 为了确定Rap1B是否调解VEGF-A诱导的血管免疫抑制和内皮无能.
- 探索Rap1B作为增强癌症免疫疗法的潜在治疗标.
主要方法:
- 利用内皮细胞特异性的Rap1B淘汰赛小鼠模型.
- 在淘汰赛和野生型小鼠中分析了瘤生长,血管形态和免疫细胞透 (CD8+ T细胞).
- 研究了Rap1B在血管内皮生长因子受体2 (VEGFR2) 信号通路中的作用.
主要成果:
- 特定于EC的Rap1B淘汰赛导致瘤生长受损并改变了瘤血管形态.
- 缺少Rap1B显著增加了CD8+T细胞透和激活在瘤中的情况.
- 这些发现表明Rap1B调解了VEGF-A对瘤血管系统的免疫抑制作用.
结论:
- 在瘤微环境中,Rap1B是VEGF-A驱动的血管免疫抑制和内皮无能化的关键调解者.
- 向Rap1B是一种有前途的策略,通过逆转内皮无能并增强抗瘤免疫力来克服免疫疗法耐药性.
- Rap1B与RAS瘤基因的结构相似性为开发新型抗Rap1疗法提供了潜在的框架.
更多相关视频
11:34A Simple and Efficient Method for Testing Immunomodulatory Agents for Generation of Tolerogenic Dendritic Cells from Human CD14+ Monocytes
Published on: April 11, 2025
191
08:19Transfer of Manipulated Tumor-associated Neutrophils into Tumor-Bearing Mice to Study their Angiogenic Potential In Vivo
Published on: July 20, 2019
5.9K
相关概念视频
01:24Regulation of Angiogenesis and Blood Supply
2.5K
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...
2.5K
02:57Targeted Cancer Therapies
7.5K
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...
7.5K
01:27Tumor Immunotherapy
489
Immunotherapy is a treatment that boosts or manipulates the immune system to fight diseases, including cancer. For instance, by stimulating an immune response through vaccinations against viruses that cause cancers, like hepatitis B virus and human papillomavirus, these diseases can be prevented. Nonetheless, some cancer cells can avoid the immune system due to their rapid mutation and division. The immune response to many cancers involves three phases: elimination, equilibrium, and escape.
489