通过振荡流体流动对骨细胞的机械负荷调节早期PC-3前列腺癌转移到骨的转移
Kimberly Seaman1, Chun-Yu Lin2, Xin Song1
1Department of Mechanical and Industrial Engineering, University of Toronto, Toronto, Ontario, M5S 3G8, Canada.
Advanced biology
|February 19, 2025
概括
骨细胞 (骨细胞) 的机械负荷影响早期前列腺癌转移. 流动刺激的骨细胞减少了癌细胞的粘附和迁移,为骨转移机制提供了洞察力.
科学领域:
- 骨转移研究研究 骨转移研究
- 癌症的机械生物学
- 前列腺癌的进展情况.
背景情况:
- 骨转移是晚期前列腺癌的严重并发症.
- 骨细胞,骨机械传感器,在前列腺癌转移中具有复杂的,有争议的作用.
- 关于机械负荷对癌症骨细胞相互作用的影响,实验室和体内数据存在冲突.
研究的目的:
- 为了研究流动刺激骨细胞在前列腺癌早期骨转移中的作用.
- 在骨细胞机械刺激下检查前列腺癌细胞与内皮细胞的相互作用.
- 调和有关骨细胞癌细胞动态的相矛盾的体外和体内发现.
主要方法:
- 使用微流体组织模型与流动刺激和静态骨细胞 (MLO-Y4和初级小鼠).
- 评估前列腺癌细胞 (PC-3) 粘附和跨内皮细胞迁移.
- 使用中和抗体研究了血管细胞粘附分子1 (VCAM-1) 的作用.
主要成果:
- 与静态对照相比,流动刺激的骨细胞显著降低了PC-3细胞粘附率 (32.3%) 和跨内皮移动率 (40%).
- 骨质细胞在机械负荷下调节了PC-3细胞扩散的距离和频率.
- VCAM-1阻塞消除了静态和流动刺激条件之间的癌细胞粘附和扩散的差异.
结论:
- 骨细胞在骨转移期间调节早期前列腺癌细胞扩散方面发挥着至关重要的作用.
- 骨细胞的机械刺激可以通过VCAM-1抑制前列腺癌细胞的粘附和迁移.
- 这项研究弥合了体外和体内发现之间的差距,澄清了骨细胞参与早期转移的原因.
相关概念视频
01:40Bone Remodeling
Bone remodeling is a continuous and balanced process of bone resorption by osteoclasts and bone formation by osteoblasts. In adults, it helps maintain bone mass and calcium homeostasis. While mechanical stress can stimulate turnover as part of the normal maintenance and reparative process, several hormones also regulate bone remodeling.
01:31Osteoclasts in Bone Remodeling
Osteoclasts are cells responsible for bone resorption and remodeling. They originate from hematopoietic progenitor cells present in the bone marrow. Numerous progenitor cells fuse to form multinucleated cells, each with 10-20 nuclei. A single osteoclast has a diameter of 150 to 200 µM. These cells have ruffled borders that break down the underlying bone tissue and release minerals such as calcium into the blood in bone resorption. Osteoclasts cling to bones with their ruffled edges during bone...
01:27Feedback Regulation of Calcium Concentration
Calcium is an essential signaling molecule required for various cellular functions. Calcium pumps and ion channels on cell and organellar membranes, such as those on the endoplasmic reticulum (ER), regulate calcium concentrations inside the cell. They remain closed, keeping the cytosolic calcium levels low at a resting state.
Various transmembrane receptors, such as G protein-coupled receptors (GPCRs), elicit a response to extracellular signals by increasing cytosolic calcium. Activated GPCRs...
Various transmembrane receptors, such as G protein-coupled receptors (GPCRs), elicit a response to extracellular signals by increasing cytosolic calcium. Activated GPCRs...
01:13Cell-matrix's Response to Mechanical Forces
In animal cells, the extracellular matrix allows cells within tissues to withstand external stresses and transmits signals from the outside of the cell to the inside. The extracellular matrix is extensive, and its composition varies between different types of tissues. For example, the reticular fibers and ground substance make up the ECM in loose connective tissue, while collagen and bone minerals make up the ECM of bone tissue.
Anchoring junctions mechanically attach a cell to the...
Anchoring junctions mechanically attach a cell to the...