相关实验视频
Updated: Jan 6, 2026
08:07
Three-Dimensional Bone Extracellular Matrix Model for Osteosarcoma
Published on: April 12, 2019
7.6K
单细胞几何学通过WDR5依赖色素甲基化调节骨髓瘤细胞中的自我更新因子
Ran Yan1,2, Shengnan Gong1, Lu Yang1
1Sichuan Provincial Key Laboratory for Human Disease Gene Study, Center for Medical Genetics, Sichuan Provincial People's Hospital, School of Life Science and Technology, University of Electronic Science and Technology of China, Chengdu, Sichuan, P. R. China.
概括
细胞形状影响骨髓瘤的行为. 圆形和矩形形状通过增加细胞骨收缩性和促进自我更新标记物来增强癌症干,为机械医学提供新的途径.
科学领域:
- 生物医学工程 生物医学工程
- 癌症生物学 癌症生物学
- 机械生物学 机械生物学
背景情况:
- 骨髓瘤 (OS) 是年轻人患的一种普遍的骨癌.
- OS细胞动态地响应瘤微环境中的机械线索.
- 细胞形态变化是OS细胞对机械信号反应的早期指标,但潜在的机制尚不清楚.
研究的目的:
- 研究单细胞几何形态如何影响人类骨髓瘤U-2 OS细胞行为.
- 阐明将细胞几何连接到OS细胞表型和自我更新能力的生物力学途径.
主要方法:
- 微型图案印刷被用来创建具有相同面积的定义的方形,圆形和矩形单细胞几何形状.
- 分析了MLCK,WDR5和自我更新标记物的表达水平 (Nanog,Oct4,Sox2).
- 评估了细胞骨收缩性和WDR5的核转移.
主要成果:
- 与方形细胞相比,圆形和矩形形状的U-2 OS细胞通过肌酸二酸化表现出增加的MLCK表达和增强的细胞骨收缩性.
- 增加的收缩性导致了WDR5核转位,H3K4三甲基化和自我更新标记物Nanog,Oct4和Sox2.2的上调.
- 单细胞几何学操纵显著提高了U-2 OS细胞的自我更新能力和干性.
结论:
- 空间限制和诱导的细胞几何重塑增强了骨髓瘤细胞的自我更新和干性.
- 取决于WDR5的染色体甲基化途径介导细胞几何学对OS干度的影响.
- 这些发现为骨髓瘤核机制传导提供了新的见解,并建议了机械医学干预的潜在策略.
相关概念视频
01:14Maintenance of the ES Cell State
2.6K
The cells of the blastocyst inner cell mass only remain pluripotent for a short time. This state of pluripotency and self-renewal can be maintained in embryonic stem (ES) cell culture by adding specific chemicals or growth factors to ensure the cells can continue dividing and later differentiate into different cell types. In some cases, the cells are grown on a feeder layer of differentiated cells, which provides the growth factors and extracellular matrix components necessary for stem cell...
2.6K
01:37Epigenetic Regulation
3.7K
Epigenetic changes alter the physical structure of the DNA without changing the genetic sequence and often regulate whether genes are turned on or off. This regulation ensures that each cell produces only proteins necessary for its function. For example, proteins that promote bone growth are not produced in muscle cells. Epigenetic mechanisms play an essential role in healthy development. Conversely, precisely regulated epigenetic mechanisms are disrupted in diseases like cancer.
X-chromosome...
X-chromosome...
3.7K
01:46Epigenetic Regulation
33.4K
Epigenetic mechanisms play an essential role in healthy development. Conversely, precisely regulated epigenetic mechanisms are disrupted in diseases like cancer.
33.4K
02:36Cells Coordinate Growth and Proliferation
5.0K
Cell size is a significant factor impacting cellular design, function, and fitness. There exists some internal coordination by which cells double their masses before division, thus, achieving homeostasis. Coordination between cell growth and proliferation depends on the checkpoints in between cell cycle phases. Loss of coordination or failure in the checkpoint mechanism can drive the cell to uncontrolled growth and loss of cellular function. Like dividing cells that coordinate cellular growth,...
5.0K
01:29Somatic to iPS Cell Reprogramming
2.5K
Reprogramming alters the gene expression in somatic cells, transforming them into induced pluripotent stem (iPS) cells over several generations. Scientists can reprogram cells by introducing genes for four transcription factors—Oct4, Sox2, Klf4, and c-Myc (OSKM) by viral or non-viral methods. These factors are also known as Yamanaka factors after Shinya Yamanaka, who first generated iPS cells using mouse skin cells. Yamanaka was awarded the Nobel Prize in Physiology or Medicine in 2012...
2.5K
02:40Cancer Stem Cells and Tumor Maintenance
5.8K
Early diagnosis and treatment can often cure cancer. However, even with treatment, residual cells called cancer stem cells (CSC) might remain, often causing tumor recurrence. These cancer stem cells possess the potential for self-renewal and multi-lineage differentiation and are often responsible for the therapeutic resistance displayed in most cancers.
Cancer stem cells are thought to originate from tissue-specific normal stem cells or progenitor cells. The normal stem cells usually reside in...
Cancer stem cells are thought to originate from tissue-specific normal stem cells or progenitor cells. The normal stem cells usually reside in...
5.8K