一个蛋白质冠状体调节矿化竞争对手矩阵囊泡的功能
Juçara Gastaldi Cominal1, Heitor Gobbi Sebinelli1, Larwsk Hayann1
1Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto 14040-901, Brazil.
围绕矩阵囊泡 (MV) 的蛋白质冠状体会影响它们的骨矿化功能. 移除这种冠状状体会增加酶活性,但会减少矿物沉积,影响ECM的定和矿物传播.
科学领域:
- 生物化学 生化学
- 细胞生物学 细胞生物学
- 生物材料科学 生物材料科学
背景情况:
- 矩阵囊泡 (MV) 对于启动骨矿化至关重要,因为它们的光线内形成矿物质种子.
- 通过MV传播矿化到原细胞外基质 (ECM) 的机制尚未完全理解.
- 蛋白冠,纳米颗粒上吸附的蛋白质的一层,可以改变它们的生物功能.
研究的目的:
- 研究蛋白冠状体在调节骨矿化过程中矩阵囊泡功能中的作用.
- 为了确定蛋白质冠状的改变如何影响MV酶活性,矿物沉积和ECM定.
主要方法:
- 从胚胎生长板中分离出原生母体囊泡 (MV).
- 通过去除蛋白质冠状体来制备"剃光"的MV和通过重新添加冠状体蛋白来"重组"的MV.
- 分析生物化学性质 (例如,组织非特异性性酸酶活性),矿物沉积,ECM anchoring,以及蛋白质组概况.
主要成果:
- 从MV中去除蛋白冠状,增加了组织非特异性酸酶 (TNAP) 活性,但减少了矿物沉积.
- 与原生MV相比,重建的MV显示TNAP活动和矿物沉积的部分恢复.
- 改变的蛋白质冠状体显著影响了MV与原ECM结的能力,影响了矿物质的传播.
结论:
- 蛋白质冠状体在调节矩阵囊泡的矿化能力方面发挥着至关重要的作用.
- 在MV蛋白冠状的变化会影响它们的酶活性,矿物沉积和ECM相互作用.
- 了解这些蛋白质冠状病毒-MV相互作用可以为骨修复和再生的治疗策略提供信息.
更多相关视频
09:22Increasing Durability of Dissociated Neural Cell Cultures Using Biologically Active Coralline Matrix
Published on: June 3, 2020
06:47Isolation of Mesenchymal Stem Cells from Human Alveolar Periosteum and Effects of Vitamin D on Osteogenic Activity of Periosteum-derived Cells
Published on: May 4, 2018
相关概念视频
Overview of Secretory Vesicles
Various proteins regulate the aggregation of molecules inside the secretory vesicles. Chromogranins...
Essential Minerals for Bone Health
Calcium and Phosphorus
Calcium is a critical component of bones, especially in the form of calcium phosphate and calcium carbonate. Since the body cannot make calcium, it must be obtained from the diet. However, calcium cannot be absorbed from the small intestine without...
Role of Vitamins in Maintaining Bone Health
Vitamin A
Vitamin A is involved in the process of bone remodeling. Retinoic acid, the active metabolite of Vitamin A, has nuclear receptors in osteoblasts and osteoclasts, which are involved in bone remodeling.
Vitamin B12
Vitamin B12 acts as a cofactor during the formation of osteoblast-related proteins, such as osteocalcin. Vitamin B12 plays a role...
COP Coated Vesicles
Matrix Proteoglycans and Glycoproteins
Calmodulin-dependent Signaling
The Ca2+-CaM complex does not have enzymatic activity by itself. Instead, the complex binds downstream target proteins, including membrane proteins or enzymes,...
