Hypoxia Reoxygenation Model
Hypoxia Reoxygenation Model - Related Videos
10:41
A Hypoxia-Reoxygenation Injury Model in Self-Assembling Human Cardioids
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2026
Self-assembling human cardiac organoids (hCOs) are an emerging system for modeling human cardiac development and disease. Here, a methodology for generating and injuring hCOs with hypoxia-reoxygenation and details of expected histological and functional outcomes after injury are provided.
06:23
Modeling Hypoxia/Reoxygenation Injury in Proximal Tubular Epithelial Cells
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2025
Here, we describe an in vitro protocol to model hypoxia/reoxygenation damage in the highly metabolic proximal tubular epithelial cells. This model is designed to induce metabolic stress-induced damage, which can be measured through the expression of proximal tubule damage markers and assessment of mitochondrial respiratory function.
12:02
Human Primary Trophoblast Cell Culture Model to Study the Protective Effects of Melatonin Against Hypoxia/reoxygenation-induced Disruption
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Cited by 35 •
2016
This manuscript presents a unique in vitro model of immunopurified human villous cytotrophoblast cells cultured under hypoxia/reoxygenation. This model is suitable to study the protective effects of promising treatments, such as melatonin, on pregnancy complications associated with increased oxidative stress and altered placental function.
08:56
Oxygen-Glucose Deprivation and Reoxygenation as an In Vitro Ischemia-Reperfusion Injury Model for Studying Blood-Brain Barrier Dysfunction
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Cited by 46 •
2015
Ischemia-Reperfusion (IR) injury is associated with a high rate of morbidity and mortality. The goal of the in vitro model of oxygen-glucose deprivation and reoxygenation (OGD-R) described here is to assess the effects of ischemia reperfusion injury on a variety of cells, particularly in blood-brain barrier (BBB) endothelial cells.
09:54
A Model to Simulate Clinically Relevant Hypoxia in Humans
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Cited by 1 •
2016
Hypoxia simulation in humans has usually been performed by inhaling hypoxic gas mixtures. For this study, apneic divers were used to simulate dynamic hypoxia in humans. Additionally, physiological changes in desaturation and re-saturation kinetics were evaluated with non-invasive tools such as Near-Infrared-Spectroscopy (NIRS) and peripheral oxygenation saturation (SpO2).
FAQs
Restoration of oxygen after a period of reduced availability can generate oxidative stress, while the full cycle also alters cellular metabolism. These changes may activate signaling pathways associated with survival, injury, and repair. Examining responses during both phases helps researchers distinguish effects linked to oxygen limitation from those associated with oxygen restoration and fluctuating oxygen conditions.
Signaling pathways connect changing oxygen conditions with cellular outcomes such as survival, injury, and repair. Their activation provides a mechanistic framework for explaining how cells or developing tissues respond after oxygen levels are restored. Studying these pathways can therefore reveal protective mechanisms as well as processes that contribute to oxygen-related tissue damage.
In developing systems, oxygen instability can influence embryonic growth, tissue formation, vascular development, and differentiation. The model enables researchers to examine these developmental processes under controlled cycles rather than treating oxygen conditions as constant. This is useful for identifying how disrupted oxygen availability may alter developmental trajectories and contribute to developmental disorders.
Cells or developing tissues are first placed under controlled hypoxia, meaning reduced oxygen availability, and are then returned to normal oxygen levels during reoxygenation. Researchers evaluate the resulting cellular or tissue responses across this sequence. The controlled order of exposure allows oxygen-related changes in metabolism, oxidative stress, signaling, survival, injury, and repair to be investigated systematically.
A hypoxia-only design cannot capture responses that occur when oxygen levels return to normal. Including reoxygenation makes it possible to investigate effects associated with oxygen restoration, including oxidative stress and signaling linked to injury or repair. This broader experimental context better represents the consequences of oxygen fluctuations and supports analysis of responses across the complete cycle.
Developmental biology researchers use the system to examine how unstable oxygen conditions affect embryonic growth, vascular development, tissue formation, and differentiation. It also provides a controlled platform for evaluating protective mechanisms and potential interventions. These applications connect cellular responses observed in the experiment with developmental disorders and tissue damage related to oxygen instability.