Clinical Trials Logo

Clinical Trial Summary

Altitude-related hypoxia decreases human functional capacity, especially during exercise. Even with prolonged acclimatization, the physiological adaptations are insufficient to preserve exercise capacity, especially at higher altitudes completely. Consequently, there has been an ongoing search for various interventions to mitigate the negative effects of hypoxia on human performance and functional capacity. Interestingly, early data in rodents and humans indicate that intermittent exogenous ketosis (IEK) by ketone ester intake improves hypoxic tolerance, i.e.by facilitating muscular and neuronal energy homeostasis and reducing oxidative stress. Furthermore, there is evidence to indicate that hypoxia elevates the contribution of ketone bodies to adenosine-triphosphate (ATP) generation, substituting glucose and becoming a priority fuel for the brain. Nevertheless, it is reasonable to postulate that ketone bodies might also facilitate long-term acclimation to hypoxia by upregulation of both hypoxia-inducible factor-1α and stimulation of erythropoietin production. The present project aims to comprehensively investigate the effects of intermittent exogenous ketosis on physiological, cognitive, and functional responses to acute and sub-acute exposure to altitude/hypoxia during rest, exercise, and sleep in healthy adults. Specifically, we aim to elucidate 1) the effects of acute exogenous ketosis during submaximal and maximal intensity exercise in hypoxia, 2) the effects of exogenous ketosis on sleep architecture and quality in hypoxia, and 3) the effects of exogenous ketosis on hypoxic tolerance and sub-acute high-altitude adaptation. For this purpose, a placebo-controlled clinical trial (CT) in hypobaric hypoxia (real high altitude) corresponding to 3375 m a.s.l. (Rifugio Torino, Courmayeur, Italy) will be performed with healthy individuals to investigate both the functional effects of the tested interventions and elucidate the exact physiological, cellular, and molecular mechanisms involved in acute and chronic adaptation to hypoxia. The generated output will not only provide novel insight into the role of ketone bodies under hypoxic conditions but will also be of applied value for mountaineers and athletes competing at altitude as well as for multiple clinical diseases associated with hypoxia.


Clinical Trial Description

n/a


Study Design


Related Conditions & MeSH terms


NCT number NCT06097754
Study type Interventional
Source Jozef Stefan Institute
Contact
Status Active, not recruiting
Phase N/A
Start date September 18, 2023
Completion date June 30, 2024

See also
  Status Clinical Trial Phase
Recruiting NCT04498598 - Structural Modification In Supraglottic Airway Device N/A
Completed NCT05532670 - N600X Low Saturation Accuracy Validation
Enrolling by invitation NCT04106401 - Intravascular Volumes in Hypoxia During Antarctic Confinement N/A
Recruiting NCT05883137 - High-flow Nasal Oxygenation for Apnoeic Oxygenation During Intubation of the Critically Ill
Not yet recruiting NCT05817448 - Hypoxia-induced Autophagy in the Pathogenesis of MAP
Recruiting NCT02661152 - DAHANCA 30: A Randomized Non-inferiority Trial of Hypoxia-profile Guided Hypoxic Modification of Radiotherapy of HNSCC. Phase 3
Terminated NCT02801162 - Evaluation of Accuracy and Precision of a New Arterial Blood Gas Analysis System Blood in Comparison With the Reference Standard N/A
Completed NCT02943863 - Regional Ventilation During High Flow Nasal Cannula and Conventional Nasal Cannula in Patients With Hypoxia N/A
Not yet recruiting NCT02201875 - Intrinsic Periodic Pattern of Breathing N/A
Completed NCT02105298 - Effect of Volume and Type of Fluid on Postoperative Incidence of Respiratory Complications and Outcome (CRC-Study) N/A
Completed NCT01922401 - Inverse Ratio Ventilation on Bariatric Operation N/A
Active, not recruiting NCT01681238 - Goal-directed Therapy in High-risk Surgery N/A
Completed NCT01463527 - Using Capnography to Reduce Hypoxia During Pediatric Sedation N/A
Completed NCT01507623 - Value of Capnography During Nurse Administered Propofol Sedation (NAPS) N/A
Withdrawn NCT00638040 - The Gene Expression Studies of the Role of Tumor Microenvironments in Tumor Progression N/A
Completed NCT04589923 - The VISION-Acute Study
Completed NCT05044585 - Evaluation of RDS MultiSense® in Desaturation Analysis in Healthy Volunteers N/A
Completed NCT03659513 - The Effect of ECMO on the Pharmacokinetics of the Drugs and Their Clinical Efficacy
Completed NCT03221387 - Sleep and Daytime Use of Humidified Nasal High-flow Oxygen in COPD Outpatients N/A
Not yet recruiting NCT05914324 - Outpatient Pediatric Pulse Oximeters in Africa N/A