相关实验视频
Updated: Jan 16, 2026

10:19
Analysis and Imaging of Osteocytes
Published on: November 29, 2024
1.3K
骨的机械变形会在骨细胞周围以纳米级速度产生间歇性流体流
Asier Muñoz1, Annalisa De Paolis1, Luis Cardoso1
1Department of Biomedical Engineering, The City College of New York, New York, NY, United States.
Frontiers in bioengineering and biotechnology
|September 29, 2025
概括
准确模拟骨间位液流需要仔细考虑压力梯度. 小梯度模仿生理条件,将流体速度与机械负荷联系起来,而大梯度高估了流量.
科学领域:
- 生物机械工程 生物机械工程
- 细胞机械生物学 细胞机械生物学
- 生物材料科学 生物材料科学
背景情况:
- 骨细胞对骨机械生物学至关重要,通过腔-管网络 (LCN) 中的流体流动感知机械负载.
- 直接实验测量这种流体流动是具有挑战性的,因为骨的密度矩阵.
- 计算模型对于了解骨细胞机械生物学至关重要,但现有的方法产生了截然不同的结果.
研究的目的:
- 为了研究由波弹性有限元素 (FE) 和流体结构相互作用 (FSI) 模型预测的流体速度的差异.
- 为了确定强加的压力梯度对间歇性流体流动模拟的影响.
- 提供准确的模拟指南,用于研究骨中负载诱导的对流流.
主要方法:
- 开发了矿化骨基质内单个骨细胞的流体结构相互作用 (FSI) 模型.
- 在不同强加的压力梯度下模拟间歇性流体流.
- 与机械负荷下骨基质变形的模拟结果进行比较.
主要成果:
- 当强加的压力梯度小于矩阵变形时,流体速度为~100nm/s,并且依赖应变.
- 强加的更高的压力梯度导致速度超过100微米/秒,而不依赖于机械负荷.
- FE和FSI模型之间的差异与应用压力梯度的大小有关.
结论:
- 施加的压力梯度的大小显著影响模拟的间歇性流体流速.
- 为了准确地为骨细胞机械生物学模型负载诱导的对流,需要小的强加压力梯度.
- 未来的模拟应使用生理上相关的压力梯度,以避免过度估计流体流量,并更好地捕捉机械生物反应.
关键词:
这就是Canaliculus canaliculus.电流对流是指对流的对流.树状的树状物流体结构相互作用.间歇性流体流动的间歇性流体流缺口的缺口是一个空白.机械载荷 机械载荷是指机械载荷.骨质细胞骨质细胞更多相关视频
05:03A Fluorescent Intravital Imaging Approach to Study Load-Induced Calcium Signaling Dynamics in Mouse Osteocytes
Published on: February 24, 2023
1.0K
08:28A Lab-On-A-Chip Platform for Stimulating Osteocyte Mechanotransduction and Analyzing Functional Outcomes of Bone Remodeling
Published on: May 21, 2020
7.3K
相关概念视频
Bone 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
Osteoclasts 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
The Bone Matrix
5.5K
Bone contains a relatively small number of cells entrenched in a matrix of collagen fibers that provide an adherent surface for inorganic salt crystals. Both components of the matrix, organic and inorganic, contribute to the unusual properties of bone. Without collagen, bones would be brittle and shatter easily. Without mineral crystals, bones would flex and provide little support. This can be observed by an experiment: when the minerals of a bone are dissolved by soaking the bone in...
5.5K
Fluid Movement Between Compartments
3.7K
The force applied by fluids against a surface, known as hydrostatic pressure, initiates the transfer of fluid among different compartments. Within our blood vessels, the blood's hydrostatic pressure is a result of the heart's pumping action. At the arteriolar end of capillaries, hydrostatic pressure (capillary blood pressure) exceeds the opposing colloid osmotic pressure created primarily by plasma proteins like albumin. This discrepancy in pressure propels plasma and nutrients from the...
3.7K
Fractures: Bone Repair
5.1K
Treatment for a fracture is based on the type of break, the bone affected, and the patient's age.
Minor fractures with no bone displacement are treated by immobilizing the fractured bone using a cast or splint. However, in the case of fractures with displaced bones, the broken bones are repositioned before immobilization to ensure successful healing without deformation and loss of function. The realignment of fractured bone ends is performed through a process called reduction. If the...
Minor fractures with no bone displacement are treated by immobilizing the fractured bone using a cast or splint. However, in the case of fractures with displaced bones, the broken bones are repositioned before immobilization to ensure successful healing without deformation and loss of function. The realignment of fractured bone ends is performed through a process called reduction. If the...
5.1K
Spongy Bone
7.6K
All bones comprise an outer layer of compact bone, and an interior made up of spongy bone tissue, also called cancellous or trabecular bone. In long bones, spongy bone tissue is mainly found in the interior of the epiphyses (broad ends of the bone).
Spongy bone is more porous, and less dense compared to compact bone. It is composed of concentric lamellae that are arranged irregularly to form the trabecular network. In some bones, the spaces between trabeculae contain red marrow, where...
Spongy bone is more porous, and less dense compared to compact bone. It is composed of concentric lamellae that are arranged irregularly to form the trabecular network. In some bones, the spaces between trabeculae contain red marrow, where...
7.6K