Supramaximal Intensity Hypoxic Exercise and Vascular Function Assessment in Mice
March 15th, 2019
High-intensity training in hypoxia is a protocol that has been proven to induce vascular adaptations potentially beneficial in some patients and to improve athletes' repeated sprint ability. Here, we test the feasibility of training mice using that protocol and identify those vascular adaptations using ex vivo vascular function assessment.
Our protocol is significant because it describes for the first time how to perform the Supramaximal Intensity Training in mice, especially in hypoxia, and if in induces specific vascular endothelium adaptations.The main advantage of using this technique with mice is that it draws further investigation of vascular mechanism.Exercise training is an important strategy for maintaining health and preventing many chronic disease.Combining exercise with hypoxia leads to specific cellular and molecular adaptations, with potential therapeutic application.For example, in patients with peripheral artery disease, or hypertension.Demonstrating this procedure will be Jessica Lavier, a PhD student from the Laboratory of the Angiology Division, Steeve Men
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Overview
This study investigates high-intensity training in hypoxia and its effects on vascular adaptations in mice. The research aims to assess the feasibility of this training protocol and identify the resulting vascular changes through ex vivo vascular function assessment.
Key Study Components
Area of Science
- Neuroscience
- Physiology
- Exercise Science
Background
- High-intensity training in hypoxia can induce vascular adaptations.
- These adaptations may be beneficial for certain patients.
- The protocol is known to enhance athletes' repeated sprint ability.
- Understanding these adaptations in a model organism like mice can provide insights into human applications.
Purpose of Study
- To test the feasibility of high-intensity training in hypoxia in mice.
- To identify vascular adaptations resulting from this training.
- To assess the implications of these adaptations for both health and athletic performance.
Methods Used
- High-intensity training protocol applied to mice.
- Ex vivo vascular function assessment to evaluate adaptations.
- Comparison of vascular responses pre- and post-training.
- Analysis of physiological changes related to training.
Main Results
- Successful implementation of high-intensity training in hypoxia in mice.
- Identification of significant vascular adaptations.
- Evidence of improved vascular function post-training.
- Potential implications for enhancing athletic performance and patient care.
Conclusions
- High-intensity training in hypoxia is feasible in mice.
- This training induces beneficial vascular adaptations.
- Findings may inform future research on exercise protocols for health and performance.
Frequently Asked Questions
Executive Industry Relevance
This protocol enables preclinical evaluation of exercise-induced vascular adaptations under hypoxic conditions, offering a mechanistic model for assessing therapeutic strategies targeting endothelial function in cardiovascular diseases. By combining supramaximal intensity training with hypoxia, the approach supports target validation and mechanistic de-risking for interventions aimed at improving vascular health in conditions such as peripheral artery disease and hypertension. The ex vivo vascular function assessment provides quantitative, reproducible readouts that enhance predictive confidence in early discovery stages.
Strategic Applications in Biopharma R&D
Early Discovery & Target Validation
- Scientific Value: Enables interrogation of vascular endothelium adaptations in response to combined exercise and hypoxia stimuli.
- Operational Value: Provides a disease-relevant system for probing mechanisms underlying vascular dysfunction in cardiovascular pathologies.
- Scientific Value: Supports hypothesis testing for targets involved in exercise-mediated vascular remodeling and endothelial function.
Screening & Assay Development
- Scientific Value: Generates standardized vascular tissue preparations for consistent ex vivo functional assessment.
- Operational Value: Establishes reproducible isometric tension protocols to quantify vascular reactivity and endothelial-dependent responses.
- Scientific Value: Delivers quantitative dependent variable measurements (e.g., tension, relaxation) that enable comparative analysis across experimental conditions.
Translational & Preclinical Research
- Scientific Value: Utilizes murine models of pulmonary artery, abdominal aorta, and iliac artery to assess vascular adaptations with translational relevance to human pathophysiology.
- Operational Value: Facilitates continuity from discovery through preclinical validation by linking exercise-hypoxia stimuli to functional vascular outcomes.
- Scientific Value: Supports risk-adjusted advancement decisions by providing mechanistic insights into vascular adaptations that may inform therapeutic efficacy.
Pipeline & Workflow Integration
The method integrates into the discovery continuum by enabling hypothesis-driven evaluation of vascular targets following exercise-hypoxia intervention, supporting lead identification through functional validation, and informing preclinical work via mechanistic de-risking of vascular pathways.
- Discovery Biology: Supports hypothesis testing and pathway clarification by linking supramaximal hypoxic exercise to vascular endothelium adaptations.
- Screening: Delivers assay readiness through standardized dissection and ex vivo vascular function assessment protocols.
- Analytics: Provides quantitative measurements of vascular tension and relaxation that enable comparison of functional responses across conditions.
- Translational Research: Connects exercise-induced vascular adaptations to preclinical continuity through analysis of disease-relevant arterial beds.
- Enterprise Reuse: Establishes a reusable platform for evaluating vascular effects of exercise-mimetic or hypoxia-targeting compounds.
Operational & Enterprise Impact
- Scientific Value: Enhances predictive confidence in target validation by revealing exercise-hypoxia-induced vascular adaptations.
- Operational Value: Ensures standardization and reproducibility through defined exercise intensity (150% maximal speed), hypoxia exposure, and vascular dissection protocols.
- Strategic Value: Improves go/no-go decisions by reducing mechanistic ambiguity in vascular pathways relevant to cardiovascular disease.
- Portfolio Impact: Enables risk-adjusted prioritization of compounds targeting exercise-mediated vascular health benefits.
Implementation Considerations
- Requires expertise in rodent exercise physiology, hypoxic exposure systems, and vascular tissue dissection.
- Dependent on motorized treadmill, hypoxic chamber, and myograph equipment for isometric tension studies.
- Necessitates cross-team standardization between in vivo training execution and ex vivo functional assessment teams.
- Involves adaptation considerations when translating protocols across different vascular beds or disease models.
- Limited by the need for specialized equipment and technical proficiency in vascular isolation and mounting techniques.
Biopharma FAQs
Chapters in this video
0:04
Title
1:09
Determination of the Maximal Speed and Standard Assessment of Performance Improvement by Treadmill Incremental Test
2:02
Hypoxic Environment
3:07
Supramaximal Intensity Training
4:04
Organ Extraction
6:02
Ex Vivo Vascular Function Assessment
8:05
Results: The Effect of Supramaximal Intensity Training in Normoxia and Hypoxia
9:22
Conclusion
