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Related Concept Videos

Shearing Stress01:18

Shearing Stress

Shearing stress, denoted by the Greek letter tau (τ), is stress caused by forces acting transversely on an object. These forces create internal ones within the entity in the plane where the external forces are applied. The resultant of these internal forces is the shear in the section.
The average shearing stress can be calculated by dividing the shear by the area of the cross-section.
Redox Equilibria: Overview01:23

Redox Equilibria: Overview

A reduction-oxidation reaction is commonly called a redox reaction. In a redox reaction, electrons are transferred from one species to another rather than being shared between or among atoms. The reducing agent or reductant is the species that loses electrons and gets oxidized in the process. The species that gains electrons and gets reduced in the process is the oxidizing agent or oxidant. Redox reactions are represented as two separate equations called half-reactions, where one equation...
Redox Reactions01:24

Redox Reactions

Oxidation-reduction or redox reactions involve the transfer of electrons from one molecule or atom to another. When an atom gains an electron, another atom must lose an electron, meaning oxidation and reduction must occur together. Since the redox occurs in pairs, the atom that gets oxidized is also called the reducing agent or reductant, and the atom that is reduced is also called the oxidizing agent or oxidant. A straightforward way to remember the definitions of oxidation and reduction is...
Redox Reactions01:27

Redox Reactions

Redox reactions are vital biochemical processes that underpin energy metabolism in cells. These reactions involve the transfer of electrons between molecules, occurring in tandem as oxidation and reduction. Oxidation refers to the loss of electrons, while reduction denotes their gain. This coupling ensures the seamless flow of electrons through metabolic pathways. For example, in bacterial metabolism, glucose undergoes oxidation to carbon dioxide, while oxygen is simultaneously reduced to...
Redox Titration: Other Oxidizing and Reducing Agents01:26

Redox Titration: Other Oxidizing and Reducing Agents

Besides iodine, other oxidizing or reducing agents can serve as titrants in redox titrations. Common oxidizing titrants include KMnO4, cerium(IV), and K2Cr2O7. The choice of oxidizing titrants depends on factors like stability, cost, analyte strength, and reaction rate between the analyte and titrant. KMnO4 is a strong oxidizing titrant that reduces from Mn(VII) to Mn(II) in a highly acidic solution, simultaneously oxidizing the analyte to a higher oxidation state. In this case, KMnO4 acts as a...
Vascular Resistance01:20

Vascular Resistance

Vascular resistance is a critical concept in understanding blood flow dynamics in the circulatory system. It refers to the resistance that blood encounters as it flows through the blood vessels. This resistance is a key factor in determining blood pressure and cardiac workload.
The primary determinants of vascular resistance are vessel diameter, blood viscosity, and vessel length. Among these, vessel diameter plays the most significant role due to the fourth power relationship described by...

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Related Experiment Video

Updated: Jun 3, 2026

Designing Microfluidic Devices for Studying Cellular Responses Under Single or Coexisting Chemical/Electrical/Shear Stress Stimuli
10:35

Designing Microfluidic Devices for Studying Cellular Responses Under Single or Coexisting Chemical/Electrical/Shear Stress Stimuli

Published on: August 13, 2016

Redox going with vascular shear stress.

Noriko Noguchi, Hanjoong Jo

    Antioxidants & Redox Signaling
    |April 5, 2011
    PubMed
    Summary

    This article reviews how vascular shear stress influences redox signaling in endothelial cells. It explores how disturbed flow can lead to oxidative stress and promote atherogenic responses. The study synthesizes findings from in vitro, ex vivo, and in vivo models to identify key molecular pathways. Experts highlight the role of redox-sensitive transcription factors in these responses. The authors also evaluate the strengths and limitations of current experimental systems. They suggest that redox balance is central to vascular health and disease progression. The review emphasizes the need for standardized models and further research into redox mechanisms. These findings provide a foundation for future investigations into vascular biology and disease.

    Keywords:
    Redox signalingVascular biologyShear stressEndothelial cells

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    Electrophysiological Recordings of Single-cell Ion Currents Under Well-defined Shear Stress
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    The Assembly and Application of 'Shear Rings': A Novel Endothelial Model for Orbital, Unidirectional and Periodic Fluid Flow and Shear Stress

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    Designing Microfluidic Devices for Studying Cellular Responses Under Single or Coexisting Chemical/Electrical/Shear Stress Stimuli
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    09:20

    The Assembly and Application of 'Shear Rings': A Novel Endothelial Model for Orbital, Unidirectional and Periodic Fluid Flow and Shear Stress

    Published on: October 31, 2016

    Area of Science:

    • Vascular biology
    • Redox signaling
    • Endothelial cell function

    Background:

    Vascular shear stress influences endothelial cell behavior and contributes to disease progression. While the connection between shear stress and vascular health is well established, the precise redox mechanisms remain unclear. Prior research has shown that altered flow patterns can lead to localized disease, such as atherosclerosis. However, the specific molecular pathways linking shear stress to redox regulation are not fully understood. This gap motivated a deeper investigation into how redox signaling mediates pro- and antiatherogenic responses. No prior work had resolved the full scope of redox-dependent mechanisms in shear stress studies. The field requires clarification on how different flow conditions affect redox balance in endothelial cells. This uncertainty drives the need for comprehensive reviews of current experimental models and findings.

    Purpose Of The Study:

    This study aims to synthesize current knowledge on redox-dependent mechanisms influenced by vascular shear stress. The focus is on understanding how shear stress modulates endothelial cell responses. Experts reviewed both in vitro and in vivo findings to identify key molecular pathways. The goal is to clarify how redox signaling contributes to atherogenesis. The study also seeks to evaluate the tools and models used in shear stress research. By compiling recent findings, the authors aim to highlight gaps in current understanding. The specific problem addressed is the lack of a unified framework for redox mechanisms in vascular disease. This work provides a foundation for future investigations into redox signaling and vascular function.

    Main Methods:

    The study uses a review approach to compile findings from in vitro, ex vivo, and in vivo models. Experts analyzed how different flow conditions affect endothelial cell signaling. They examined redox-dependent pathways and their role in pro- and antiatherogenic responses. The review includes data from experimental systems such as flow chambers and animal models. The authors synthesized evidence from multiple studies to identify common themes. They also evaluated the strengths and limitations of current experimental approaches. The focus was on molecular mechanisms rather than individual studies. The review approach allowed for a broader understanding of redox signaling in vascular biology.

    Main Results:

    The review highlights that disturbed flow increases oxidative stress in endothelial cells. This imbalance may promote atherogenic responses through redox signaling. Normal flow conditions are associated with anti-inflammatory effects and reduced oxidative stress. The study found that redox-sensitive transcription factors are key players in these responses. In vitro models show that shear stress activates antioxidant pathways in endothelial cells. In vivo studies support these findings, linking redox balance to vascular health. The review also identifies limitations in current models, such as variability in flow conditions. These findings suggest that redox signaling is a central mechanism in vascular disease progression.

    Conclusions:

    The authors propose that redox signaling is a critical mediator of vascular responses to shear stress. They suggest that disturbed flow leads to pro-atherogenic changes through redox imbalance. Normal flow conditions may protect against disease by maintaining redox homeostasis. The review indicates that current models have limitations in capturing full biological complexity. The authors highlight the need for standardized experimental systems in future studies. They also suggest that redox-sensitive pathways are promising targets for further research. The synthesis of findings supports the idea that redox mechanisms are central to vascular disease. These conclusions emphasize the importance of integrating redox signaling into vascular biology research.

    The authors propose that disturbed flow increases oxidative stress in endothelial cells, which may promote atherogenic responses.

    The study reviewed in vitro, ex vivo, and in vivo systems used to study shear stress effects on endothelial cells.

    The authors suggest that redox imbalance may contribute to pro-atherogenic changes, while redox homeostasis supports vascular health.

    The study indicates that redox-sensitive transcription factors are key in mediating responses to shear stress in endothelial cells.

    The authors found that in vitro models show antioxidant activation under normal flow, which is supported by in vivo studies linking redox balance to vascular health.

    The review highlights variability in flow conditions and limitations in capturing full biological complexity in current experimental systems.