Sickle Cell Trait and Exercise, Effect of Hot Environment (TDex)
|The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details.|
|ClinicalTrials.gov Identifier: NCT04028791|
Recruitment Status : Completed
First Posted : July 23, 2019
Last Update Posted : July 23, 2019
The heterozygous form of sickle cell disease is clinically asymptomatic. Nevertheless, it was observed that, the sickle cell trait is associated with serious medical complications especially during intense physical efforts. Moreover, the exposure to a hot environment (tropical climate) is suspected to be a determining factor in the occurrence of these medical complications.
However, the relationship between sickle cell trait and death during effort is not well established. Furthermore, the cascade of events that usually cause sickle cell crisis such as red blood cells sickling and rhabdomyolysis and which affect microcirculation are not known.
Our main objective in this study is to verify whether young healthy active men with sickle cell trait have reactive hyperemia to their hemoglobinemic condition during exercise; to identify the contribution of hot environment on these possible disturbances; and to determine underlying mechanisms.
In addition, disturbances in the regulation of glucose metabolism in healthy subjects under hot environment have been reported, marked by a significant increase in postprandial blood glucose. Therefore, this project is also intended to assess the contribution of the disturbance of glycoregulation during exercise under hot environment in active sickle cell trait carriers. The imbalance of pro and anti oxidant agents, the adhesion and inflammation markers will also be evaluated.
Results of this study will allow a better understanding of physio-pathological mechanisms leading to vascular accidents during exercise under tropical climate in young healthy sickle cell trait carriers; and to identify physical activity programs and nutritional interventions adapted to patients with sickle cell disease under hot environment.
|Condition or disease||Intervention/treatment||Phase|
|Sickle Cell Trait Environmental Exposure Adverse Effect||Other: Exercise on ergocycle||Not Applicable|
|Study Type :||Interventional (Clinical Trial)|
|Actual Enrollment :||21 participants|
|Intervention Model:||Single Group Assignment|
|Intervention Model Description:||
All participants in each group (AA, AS) will carry out the following 3 sessions:
|Masking:||None (Open Label)|
|Official Title:||Metabolic and Vascular Response to Exercise in Sickle Cell Trait Carriers: Effect of Hot Environment|
|Actual Study Start Date :||September 25, 2017|
|Actual Primary Completion Date :||July 1, 2019|
|Actual Study Completion Date :||July 1, 2019|
Experimental: AS and AA
Participants will be submitted to 45 minutes of exercise on ergocycle.
Other: Exercise on ergocycle
The exercise includes 15 minutes of warm up, then participants will be asked to pedal as fast as possible for 6 seconds. The test of 6 seconds will be repeated twice or more with recovery each time
- Microvascular function [ Time Frame: 2 hours ]Reactive hyperemia index (arbitrary units) will be assessed at rest, during exercise and during recovery in hot and thermoneutral environment
- Oxidative stress [ Time Frame: 3 months ]Glutathione ratio GSSH/GSSG
- Inflammation [ Time Frame: 3 months ]Myeloperoxidase (MPO)
- Adhesion molecules [ Time Frame: 3 mois ]VCAM-1
- Hemorheology [ Time Frame: 24 hours ]hematocrit
- Rhamdomyolysis [ Time Frame: 3 months ]Creatine kinase
- Oxydative stress marker [ Time Frame: 3 months ]superoxide dismutase (SOD)
- Glucose metabolism [ Time Frame: 3 months ]glucose
To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT04028791
|Pointe-à-Pitre, Guadeloupe, 97157|
|Principal Investigator:||Stéphane Henri, Dr||Laboratoire ACTES, EA 3596 UFR STAPS, University of the French West Indies and French Guiana|
|Study Director:||Olivier Hue, PhD||Laboratoire ACTES, EA 3596 UFR STAPS, University of the French West Indies and French Guiana|
|Principal Investigator:||Mona Hedreville, Dr||Unités Urgences cardiologiques CHU, Pointe-à-Pitre/Abymes 97159|