PLAGL1-IGF2轴调节产后状细胞发育的骨质生成
Jinrui Sun1,2,3, Jingyi Xu1,2,3, Yue Xu1,2,3
1Department of Prosthodontics, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.
International journal of oral science
|September 25, 2025
概括
PLAGL1-IGF2轴对下尾发育至关重要. 缺少PLAGL1会通过破坏IGF2通路,损害骨质细胞分化和状细胞生长.
科学领域:
- 头骨面部的发展
- 骨生物学 骨生物学 骨生物学
- 基因规则 基因规则
背景情况:
- 下骨对面骨生长至关重要,在产后发育过程中需要协调信号.
- 骨质生成依赖于复杂的基因调节网络和生长因子通路.
- 发育过程中涉及的基因是Plagl1,这是一种父性表达的编码转录因子的基因.
研究的目的:
- 为了研究PLAGL1在产后下尾膜发育中的作用.
- 阐明PLAGL1调节骨质生成的分子机制.
- 为了确定PLAGL1在状细胞形态发生中的关键作用因子.
主要方法:
- 使用神经细胞 (CNCC) 衍生的血统特定的Plagl1淘汰赛小鼠模型.
- 评估了Plagl1缺乏对骨质母细胞分化和状细胞发育的影响.
- 研究了胰岛素样生长因子2 (IGF2) /IGF结合蛋白 (IGFBP) 途径的参与.
主要成果:
- 在小鼠体内,PLAGL1在CNCC衍生细胞中高度表达.
- 缺少Plagl1显著损害骨质母细胞分化和下肌的发育.
- PLAGL1-IGF2/IGFBP轴调节骨质生成,而Plagl1缺陷会降低这种途径的调节.
- 缺少Plagl1的小鼠的骨质生成受损包括葡萄糖代谢失调和细胞外矩阵组织缺陷.
- 外源性IGF2的使用挽救了骨质母细胞分化受损.
结论:
- PLAGL1-IGF2轴是产后下骨发展过程中骨质生成的关键调节者.
- 通过IGF2信号传递,PLAGL1在维持正确的下生长方面发挥着重要作用.
- 了解这一轴可以了解面骨发育和潜在的治疗点.
相关概念视频
01:24Bone Formation by Endochondral Ossification
8.4K
Bone formation, or ossification, begins around the sixth to seventh week of embryonic development. Most bones develop from a cartilaginous template through the process of endochondral ossification. Cartilage formation begins when clusters of mesenchymal cells differentiate into chondrocytes. These chondrocytes proliferate rapidly and secrete an extracellular matrix that becomes encased in a membrane called the perichondrium. The resulting cartilage model provides a template that resembles the...
8.4K
01:29Bone Formation by Intramembranous Ossification
10.2K
Intramembranous ossification is one of the two processes involved in the development of bones within an embryo. The flat bones of the face, most of the cranial bones, and the clavicles are formed via this process. During intramembranous ossification, the bones develop directly from sheets of undifferentiated mesenchymal connective tissue.
The process begins when mesenchymal cells in the embryonic skeleton gather together and differentiate into osteogenic cells, which then develop into ...
The process begins when mesenchymal cells in the embryonic skeleton gather together and differentiate into osteogenic cells, which then develop into ...
10.2K
01:27Growth of Cartilage and Bone Tissue
4.0K
Chondrocytes form a temporary cartilaginous model by dividing and secreting a thick gel-like extracellular matrix. Once the chondrocytes undergo programmed cell death, osteoblasts enter the site of the cartilaginous model. The process of replacing the temporary cartilaginous model with bone in an ordered manner is called endochondral ossification. In endochondral ossification, not all of the cartilage is replaced by bone tissue. Some cartilage that performs a protective and supportive function...
4.0K
01:40Bone Remodeling
40.3K
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.
40.3K
01:17Hormones and Bone Tissue
3.7K
The endocrine system produces and secretes hormones, which interact with the skeletal system. These hormones control bone growth, maintain bone once it is formed, and remodel it.
Hormones That Influence Osteoblasts and/or Maintain the Matrix
Several hormones are necessary for controlling bone growth and maintaining the bone matrix. The pituitary gland secretes growth hormone (GH), which, as its name implies, controls bone growth. This happens in several ways: first, it triggers chondrocyte...
Hormones That Influence Osteoblasts and/or Maintain the Matrix
Several hormones are necessary for controlling bone growth and maintaining the bone matrix. The pituitary gland secretes growth hormone (GH), which, as its name implies, controls bone growth. This happens in several ways: first, it triggers chondrocyte...
3.7K
01:31Osteoclasts in Bone Remodeling
3.9K
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...
3.9K