甲功能化的PLLA膜:层层涂层和电对骨质生成的影响
Flavia Gonçalves1, Roberta Molisani Letomai1, Marjory Muraro Gomes1
1Faculdade de Odontologia, Universidade Santo Amaro, Av. Prof. Eneas de Siqueira Neto, 340, São Paulo 04829-300, SP, Brazil.
Bioengineering (Basel, Switzerland)
|February 26, 2025
概括
在指导骨再生膜中的甲显示出有前途. 四层涂层通过控制药物释放改善了骨质生成,而十层提供持续释放,但对人类牙周带干细胞的初始益处较小.
科学领域:
- 生物材料科学 生物材料科学
- 组织工程是组织工程.
- 再生医学是一种再生医学.
背景情况:
- 德克萨米他通过抗炎和骨质效应增强引导性骨再生.
- 层层涂层 (LBL) 提供了从电膜中控制药物释放的方法.
- 聚-L-乳化物 (PLLA) 膜是适合骨再生的支架.
研究的目的:
- 用德甲开发PLLA膜,用于指导骨再生.
- 为了评估来自不同纳入方法的甲释放动力学.
- 评估这些膜对人类牙周带干细胞 (hPDLSC) 增殖和骨质分化的影响.
主要方法:
- PLLA膜的电,其中包含了德克萨米他.
- 使用奇托和肝素 (4层和10层) 层次沉积 (LBL) 德克萨梅他.
- 在实验室中对hPDLSC增殖 (CCK-8),性酸酶活性和矿化 (Alizarin红色染色) 的评估.
主要成果:
- 四层LBL膜的初始药物释放率较低,但在骨质基质中增强了细胞外基质矿化.
- 十层LBL膜在14天内呈现逐渐释放的德克萨米他.
- 在21天后,电和4层LBL膜支持较高的hPDLSC增殖,而不是10层LBL.
结论:
- 从4层LBL膜中控制的,较低的初始甲松释放对骨质生成产生了积极的影响.
- 10层LBL膜提供持续的药物释放,有利于长期应用.
- 两种方法都没有在克隆基媒介中显著增强骨质分化,这表明需要进一步优化.
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.
01:27Growth of Cartilage and Bone Tissue
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...
01:24Cells of the Epidermis
The epidermis is made of four or five layers of epithelial cells, depending on its location in the body. From deep to superficial, these layers are the stratum basale, stratum spinosum, stratum granulosum, stratum lucidum, and stratum corneum.
The cells in all these layers except the stratum basale are called keratinocytes, a type of cell that manufactures and stores the protein keratin. The keratinocytes in the stratum corneum are dead and regularly slough away, being replaced by cells from...
The cells in all these layers except the stratum basale are called keratinocytes, a type of cell that manufactures and stores the protein keratin. The keratinocytes in the stratum corneum are dead and regularly slough away, being replaced by cells from...
01:29Bone Disorders
Aging and its effect on bone remodeling is the most common cause of bone disorders. In young and healthy people, bone deposition and resorption happen at an equal rate to maintain optimal bone health.
Bone deposition is also affected by the levels of sex hormones like estrogen and testosterone that promote osteoblast activity and bone matrix synthesis. When the level of these hormones decreases due to aging, it causes a reduction in bone deposition. As a result, bone resorption by osteoclasts...
Bone deposition is also affected by the levels of sex hormones like estrogen and testosterone that promote osteoblast activity and bone matrix synthesis. When the level of these hormones decreases due to aging, it causes a reduction in bone deposition. As a result, bone resorption by osteoclasts...