在高流量和低流量正常带状网状细胞中的流量依赖引
Alireza Karimi1, Hasti Golchin1, Ansel Stanik2
1Department of Ophthalmology, Casey Eye Institute, Oregon Health & Science University, Portland, Oregon, United States; Department of Biomedical Engineering, Oregon Health & Science University, Portland, Oregon, United States.
Acta biomaterialia
|February 14, 2026
概括
高流动的脊柱状网状组织/直通管状组织 (TM/JCT) 细胞感知剪切流动,增加收缩和旋转力. 低流量TM/JCT细胞对剪切不敏感,这可能解释了青光眼中增加的外流阻力.
科学领域:
- 生物力学 生物力学
- 细胞生物学 细胞生物学
- 眼科医生 眼科 眼科
背景情况:
- 水性幽默流出通道的高流量 (HF) 区域是合规的,而低流量 (LF) 区域是刚硬的,不敏感于剪切.
- 玻璃眼,以增加的眼内压力为特征,与液体排水的轨道眼网状组织的硬化有关.
- 了解剪切流是如何影响细胞矩阵生物力学,在不同区域的尾状网状网络对于眼研究至关重要.
研究的目的:
- 为了研究人类脊椎状网状网络/直径管状组织 (TM/JCT) 细胞如何将剪切流转化为细胞矩阵生物力学的区域差异.
- 为了确定HF和LFTM/JCT细胞是否对剪切应激表现出不同的反应,可能揭示着青光眼病原体的发病机制.
主要方法:
- 来自单个捐赠者的人类HF和LFTM/JCT细胞在原涂层的多烯胺凝上培养.
- 用嵌入FluoSpheres的3D引力显微镜来测量细胞矩阵力.
- 一个循环系统应用控制的剪流 (无流 → 流和流 → 无流) 每个6小时,与计算流体动力学校准.
主要成果:
- HFTM/JCT细胞在剪切流下表现出增加的引力和卷曲,表明"收缩-卷曲"的特征.
- 长肌/JCT细胞显示出相对不敏感的剪切反应,通过形剪切合保持持续的张力.
- 在12小时的流量后,HF细胞表现出比LF细胞更高的引和卷曲,HF分歧仍然为负 (收缩),而LF分歧保持在接近零/正的水平.
结论:
- HFTM/JCT细胞充当可逆剪切传感器,调节剪切流的收缩性和旋转力.
- 肺结核TM/JCT细胞保持持续紧张状态,剪切反应能力降低,有助于矩阵紧缩.
- 在LF区域,这种特定区域的剪切感应损失可能会增加外流阻力,并导致青光眼的进展.
相关概念视频
Bernoulli's Equation for Flow Normal to a Streamline
1.3K
Bernoulli's equation for flow normal to a streamline explains how pressure varies across curved streamlines due to the outward centrifugal forces induced by the fluid's curvature. The pressure is higher on the inner side of the curve, near the center of curvature, and decreases outward to balance these centrifugal forces.
The pressure difference depends on the fluid's velocity and radius of curvature. The pressure variation is minimal in flows with nearly straight streamlines. However, the...
The pressure difference depends on the fluid's velocity and radius of curvature. The pressure variation is minimal in flows with nearly straight streamlines. However, the...
1.3K
Gene Flow
38.1K
Gene flow is the transfer of genes among populations, resulting from either the dispersal of gametes or from the migration of individuals.
38.1K
Flow Cytometry
16.5K
The development of flow cytometry techniques began in 1934 with initial attempts by Andrew Moldavan, a bacteriologist who counted the cells in a flowing capillary system. Moldavan pumped cells through a capillary tube focused under a microscope for visualization. The invention of photometry allowed the measurement of differentially-stained cells, and Louis Kamentsky developed the first multiparameter flow cytometer in 1965 to identify and count the cancer cells in cervical tissue specimens.
In...
In...
16.5K
Flow Sheet
2.9K
Flowsheets are valuable tools in nursing documentation. They enable healthcare professionals to efficiently record and monitor various patient assessments and measurements in a consolidated format.
Here's a closer look at the examples of flowsheets commonly used by nurses:
Graphic Sheet Documentation:
Here's a closer look at the examples of flowsheets commonly used by nurses:
Graphic Sheet Documentation:
2.9K
Flow Table Test
779
The flow table test is an established method used to assess the workability of concrete, particularly useful for evaluating highly flowable concrete mixes. This test employs an apparatus that consists of a wooden board topped with a steel plate, collectively weighing 35 pounds. The board is connected to a base via a hinge and measures 27.6 inches on each side.
Concrete is placed within a truncated cone mold that is 8 inches high with an 8-inch base diameter and a 5-inch top diameter. The...
Concrete is placed within a truncated cone mold that is 8 inches high with an 8-inch base diameter and a 5-inch top diameter. The...
779
Irrotational Flow
1.0K
Irrotational flow is characterized by fluid motion where particles do not rotate around their axes, resulting in zero vorticity. For a flow to be irrotational, the curl of the velocity field must be zero. This imposes specific conditions on velocity gradients. For instance, to maintain zero rotation about the z-axis, the gradient condition:
1.0K


