控制的机械负荷会影响猪椎骨中的骨质细胞转录组 in situ
Meghana Machireddy1, Alyssa G Oberman1, Lucas DeBiase2
1Tissue Mechanics Laboratory, Bioengineering Graduate Program, University of Notre Dame, IN 46556, USA.
Bone
|February 3, 2024
概括
骨质细胞是骨质细胞的组成部分.
科学领域:
- 骨生物学 骨生物学
- 机械生物学 机械生物学
- 文字转录学 (Transcriptomics) 是一个学科.
背景情况:
- 骨细胞嵌入骨,通过细胞通信调节适应机械应力.
- 在机械负荷下了解骨质细胞基因表达可以揭示骨质疏松症和癌症治疗的目标.
研究的目的:
- 在现场研究骨细胞对机械负荷的转录反应.
- 为了比较经过一天和三天的受控机械负荷后的基因表达变化.
主要方法:
- 猪脊椎骨扩展物被培养并承受机械负荷.
- 用RNA测序和生物信息分析 (Tuxedo套件,IPA) 来识别差异表达的基因和途径.
主要成果:
- 在in situ培养后,大约有4000个基因被差异性表达.
- 负载诱导了106个差异表达的基因1天后和913个3天后,只有45个重叠.
- 分析显示,在3天后,负载和非负载组之间存在不同的转录特征.
结论:
- 持续的机械负荷显著增加骨细胞基因表达,表明顺序通路激活.
- 不同表达的基因与骨关节炎,骨细胞和软骨细胞信号传递有关.
- 早期加载会影响NFkB和TNF信号传递,可能会影响机械生物学反应和代谢过程.
更多相关视频
05:03A Fluorescent Intravital Imaging Approach to Study Load-Induced Calcium Signaling Dynamics in Mouse Osteocytes
Published on: February 24, 2023
648
05:55Author Spotlight: Developing a Rat Model for Weight-Bearing Intervention to Investigate Osteonecrosis of the Femoral Head
Published on: September 27, 2024
544
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...