Chronic Intermittent Hypoxia
Chronic Intermittent Hypoxia - Related Videos
05:45
Delivery of In Vivo Acute Intermittent Hypoxia in Neonatal Rodents to Prime Subventricular Zone-derived Neural Progenitor Cell Cultures
0 Views •
Cited by 1 •
2015
This article describes the methodology for administering short periods of intermittent hypoxia to postnatal day 1-8 mouse or rat pups. This approach effectively elicits a robust tissue level “priming effect” on cultured neural progenitor cells that are harvested within 30 min of hypoxia exposure.
09:54
A Model to Simulate Clinically Relevant Hypoxia in Humans
0 Views •
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).
07:01
Induction and Testing of Hypoxia in Cell Culture
0 Views •
Cited by 247 •
2011
Here we propose simple methods to induce hypoxia in cell cultures and simple tests to evaluate the hypoxic status of the cultures.
07:48
Glutamate and Hypoxia as a Stress Model for the Isolated Perfused Vertebrate Retina
0 Views •
Cited by 16 •
2015
With this study, we introduce a standardized stress model for the isolated superfused bovine retina for future preclinical therapeutic testing. The effect of either hypoxia (pure N2) or glutamate stress (250 µM glutamate) on retinal function represented by a- and b-wave amplitudes was evaluated.
08:01
Induction of Hypoxia in Living Frog and Zebrafish Embryos
0 Views •
Cited by 5 •
2017
We introduce a novel hypoxic chamber system for use with aquatic organisms such as frog and zebrafish embryos. Our system is simple, robust, cost-effective and allows the induction and sustainment of hypoxia in vivo and for up to 48 h. We present 2 reproducible methods to monitor the effectiveness of hypoxia.
FAQs
Repeated oxygen fluctuations activate hypoxia-inducible factors, which are cellular regulators that respond to reduced oxygen availability. Their activation forms part of the biological signaling response to each cycle and helps connect oxygen changes with downstream vascular, cardiovascular, and metabolic effects. This makes them important targets when studying how sleep-disordered breathing may influence disease processes.
Chronic Intermittent Hypoxia activates the sympathetic nervous system, which links oxygen fluctuations to cardiovascular regulation. This response is relevant to investigations of hypertension and cardiovascular risk because altered autonomic signaling can accompany the broader physiological effects associated with sleep-disordered breathing. Researchers therefore consider sympathetic activation alongside hypoxia-inducible factors, inflammation, oxidative stress, and vascular responses.
Reoxygenation is not simply a return to baseline oxygen availability. Alternating oxygen deprivation with restoration contributes to signaling involving oxidative stress, inflammation, and vascular responses. These processes help explain why repeated cycles may produce effects that differ from a single isolated reduction in oxygen, making the full oxygen-deprivation and restoration pattern important in medical research.
Medical studies use this model to examine hypertension, endothelial dysfunction, cardiovascular risk, and metabolic disturbances associated with sleep-disordered breathing. The outcomes reflect several interacting pathways rather than one isolated mechanism, including sympathetic activation, oxidative stress, inflammation, hypoxia-inducible signaling, and vascular responses. This broad scope allows researchers to connect oxygen fluctuations with clinically relevant systemic effects.
Controlled exposure protocols provide research models in which repeated oxygen changes can be examined under defined experimental conditions. The overview supports their use for investigating disease mechanisms and for evaluating potential preconditioning strategies. Their value lies in relating a controlled pattern of oxygen deprivation and reoxygenation to cardiovascular, vascular, and metabolic responses without treating the exposure as an isolated event.
Obstructive sleep apnea commonly accompanies this physiological pattern, so the model helps researchers investigate how sleep-disordered breathing may affect cardiovascular and metabolic function. Studies can focus on hypertension, endothelial dysfunction, cardiovascular risk, and metabolic disturbances while also examining the signaling pathways activated by recurring oxygen fluctuations. This connects an experimental mechanism with clinically relevant consequences.
Disease-oriented studies use the model to understand harmful cardiovascular, vascular, and metabolic consequences associated with sleep-disordered breathing. In contrast, controlled exposure is also being studied as a potential preconditioning strategy, meaning researchers are examining whether a defined prior stimulus could alter later physiological responses. These represent distinct research aims, even when they use related exposure protocols.