关节软骨的潜伏TGF-β含量随着发育和年龄的变化而变化
Sedat Dogru1, Nicholas Simone2, Halide Z Haciguzeller2
1Department of Mechanical Engineering, Boston University, Boston, USA.
Connective tissue research
|August 11, 2025
概括
关节软骨中的潜伏转化生长因子-β (LTGF-β) 水平不会随着年龄的增长而显著变化. 这表明,在软骨的整个发育和老化过程中,LTGF-β的可用性得到保护.
科学领域:
- 生物化学 生物化学
- 细胞生物学 细胞生物学
- 整形外科 整形外科 整形外科
背景情况:
- 转化生长因子-β (TGF-β) 对于软骨平衡至关重要,被封存为非活性潜伏复合体 (LTGF-β).
- LTGF-β需要特定的刺激来激活,使其能够在细胞外基质 (ECM) 内进行局部调节.
- TGF-β信号失调与软骨发育,衰老和病理有关,但LTGF-β水平仍然不够表征.
研究的目的:
- 为了研究关节软骨内潜伏TGF-β (LTGF-β) 含量的变化.
- 描述组织发育和衰老过程中LTGF-β水平的变化.
主要方法:
- 来自胎儿,不成熟和成熟动物的牛软骨外置被分析为LTGF-β含量.
- 来自13至80岁的捐赠者的人类软骨外置被评估为LTGF-β1水平.
- 进行了每单位组织体积和每细胞数量的LTGF-β量化.
主要成果:
- 在牛软骨中,每体积单位的LTGF-β随着发育而下降,但每粒细胞的LTGF-β保持不变.
- 人类软骨显示了LTGF-β1含量的广泛范围 (数量顺序的变化).
- 捐赠者的年龄并不是人类关节软骨中LTGF-β1含量的重要预测因素.
结论:
- 牛软骨的发育变化不会改变每粒细胞可用的LTGF-β.
- 人类软骨的衰老不会影响LTGF-β1的可用性.
- 这些发现表明,无论是发育还是衰老,都不是LTGF-β在软骨中的可用性限制因素.
相关概念视频
Growth of Cartilage and Bone Tissue
3.5K
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...
3.5K
The Effect of Aging on Tissues
2.4K
Several body functions deteriorate with age. The external signs of aging are easily identifiable. For example, the skin becomes dry, less elastic, and thins out, forming wrinkles. The skin of the face begins to appear looser due to a decrease in the levels of elastic and collagen fibers in the connective tissue. Additionally, melanin production in the hair follicle decreases with age, resulting in gray hair. Moreover, the senses of sight and hearing decline, so glasses and hearing aids may...
2.4K
TGF - β Signaling Pathway
7.6K
The TGF-β signaling pathway regulates cell growth, differentiation, adhesion, motility, and development. TGF-β ligands that induce TGF-β signaling are synthesized in their latent form. Several proteases or cell surface receptors such as integrins act upon the latent form, releasing the active ligand. There are three types of mammalian TGF-βs: (TGF-β1, TGF-β2, and TGF-β3) that bind as homodimers or heterodimers to TGF-β receptors. The TGF-β receptors...
7.6K


