通过DRAM1稳定VAMP8,使自细胞和溶酶体融合,并促进转移性扩散
Rui Zhang1, Vincenzo Torraca2, Chaojun Yan1
1National "111" Center for Cellular Regulation and Molecular Pharmaceutics, Key Laboratory of Fermentation Engineering (Ministry of Education), Cooperative Innovation Center of Industrial Fermentation (Ministry of Education & Hubei Province), Hubei Key Laboratory of Industrial Microbiology, Hubei University of Technology, Wuhan, China.
调节DNA损伤的自调节器1 (DRAM1) 稳定了VAMP8在溶酶体上,增强了自细胞与溶酶体的融合. 这一过程促进肝细胞癌 (HCC) 转移,表明DRAM1是治疗点.
科学领域:
- 细胞生物学
- 分子生物学
- 癌症研究
背景情况:
- 通过STX17-SNAP29-VAMP8 SNARE复合体的介导,自细胞与溶酶体的融合对自细胞的完成至关重要.
- 这种核聚变过程的关键组成部分VAMP8的精确监管机制尚未完全理解.
研究的目的:
- 在自中识别VAMP8功能的新调节剂.
- 阐明DRAM1在VAMP8稳定和自流中的作用.
- 研究DRAM1- VAMP8轴对肝细胞癌 (HCC) 转移的影响.
主要方法:
- 证实DRAM1- VAMP8相互作用的同时免疫沉测试.
- 用于评估VAMP8降解的Ubiquitination测试
- 细胞和动物模型 (体外,小鼠,斑马鱼) 用于研究转移.
- 基因枯竭实验 (ATG5,ATG7) 来确认自性依赖性.
主要成果:
- DRAM1直接与VAMP8结合,使其稳定于STUB1/CHIP介导的降解.
- DRAM1 屏蔽了 VAMP8 无处不在的部位,增强了 STX17-SNAP29-VAMP8 复合体的形成和自菌体-溶解体的融合.
- 在体外和体内,DRAM1促成的自流驱动HCC细胞扩散和转移.
- DRAM1的转移性影响取决于核心自基因 (ATG5,ATG7).
结论:
- DRAM1 作为溶酶体VAMP8稳定剂,增强自流并促进HCC转移.
- 新的DRAM1-VAMP8相互作用代表了自的一个关键调节轴.
- 对于抑制自驱动的HCC进展,DRAM1是一个潜在的治疗点.
更多相关视频
09:42Assessing Tumor Microenvironment of Metastasis Doorway-Mediated Vascular Permeability Associated with Cancer Cell Dissemination using Intravital Imaging and Fixed Tissue Analysis
Published on: June 26, 2019
06:58Evaluation of LC3-II Release via Extracellular Vesicles in Relation to the Accumulation of Intracellular LC3-positive Vesicles
Published on: October 18, 2024
相关概念视频
Cancer Cell Migration through Invadopodia
Metastasis
Epithelial-to-Mesenchymal Transition
The epithelial-to-mesenchymal transition or EMT is a developmental process commonly observed in wound healing, embryogenesis, and cancer metastasis. EMT is induced by transforming growth factor-beta (TGF-β) or receptor tyrosine kinase (RTK) ligands, which further...
Autophagy
An autophagic pathway consists of a series of signaling events activated in response to diverse stress and physiological conditions such as food deprivation,...
Delivery Pathways to the Lysosome
Endocytosis
In endocytosis, the cell membrane takes up macromolecules and particles from the surrounding medium. Clathrin-mediated...
Regulation of Angiogenesis and Blood Supply
Drugs that Stabilize Microtubules
