Changes in Cognition During a 24-h Simulated Military Operation
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|ClinicalTrials.gov Identifier: NCT04250480|
Recruitment Status : Completed
First Posted : January 31, 2020
Last Update Posted : January 31, 2020
Sustained military operations (SUSOPs) result in psychological stress and cognitive dysfunction, which may be related to the recruitment of classical monocytes into the brain.
- To investigate the effect of sustained-release beta-alanine on changes in cognition and markers of immune cell recruitment during a 24-hour simulated military operation.
- To examine associations between changes cognition and changes in markers mediating immune cell recruitment.
|Condition or disease||Intervention/treatment||Phase|
|Cognitive Impairment||Dietary Supplement: beta-alanine Dietary Supplement: placebo||Not Applicable|
Sustained military operations (SUSOPs) expose soldiers to a multitude of stressors, including sustained physical activity, caloric deficit, and sleep deprivation. Several studies have shown that the combination of these factors result in psychological stress, which often leads to significant cognitive impairment.
Psychological stress has been shown to result in activation of neuroendocrine pathways that signal into the periphery and relay information from the brain to the immune system. This process is generally characterized by elevations of several key pro-inflammatory cytokines, chemokines, secondary messengers and reactive oxygen species. Notably, peripheral classical monocytes are reported to undergo recruitment to the brain during periods of psychological stress following priming by cytokines secreted from activated microglia.
Carnosine, an endogenous dipeptide consisting of beta-alanine and L-histidine, has been shown to inhibit the synthesis of inflammatory and oxidative mediators in microglia in vitro. Beta-alanine, which is the rate limiting amino acid in carnosine formation has been shown to increase carnosine concentrations in various regions of the brain in rodents which been associated with biochemical changes that resulted in favorable improvements in resilience to stress exposure. However, data on the effects of beta-alanine supplementation on cognition in humans is less clear. Further, the effect of beta-alanine supplementation on systemic and cellular mediators of monocyte recruitment has not been examined.
- To investigate the effect of sustained-release beta-alanine on changes in psychological stress and cognition using Automated Neuropsychological Assessment Metric (ANAM) cognitive assessments during a 24-hour simulated military operation.
- To examine the effect of sustained-release beta-alanine on monocyte chemoattractant protein-1 (MCP-1), interleukin-8, Lymphocyte function-associated antigen-1 (CD11a), macrophage-1-antigen (CD11b) expression and C-C chemokine receptor 2 (CCR2) expression on neutrophils and classical monocytes during a 24-hour simulated military operation.
- To examine associations between MCP-1, interleukin-8, CD11a, CD11b, CCR2 and a composite measure of cognition derived from ANAM assessment scores during a 24-hour simulated military operation.
Double-blind placebo controlled trial compared the effect of supplementation with sustained release beta-alanine (12 grams per day) versus placebo (equivalent amount of rice powder) on cognition and monocyte responses during a 24-hour simulated military operation consisting of sleep-restriction, caloric restriction, and acute and sustained periods military specific physical activity.
Supplementation occurred over a period of 14 days prior to completion of the simulated military operation. ANAM tests were assessed and blood samples taken upon arrival to the lab for the 24 hour simulated operation (0 hours) and at 12, 18 and 24 hours during the SUSOP.
|Study Type :||Interventional (Clinical Trial)|
|Actual Enrollment :||40 participants|
|Intervention Model:||Parallel Assignment|
|Masking:||Double (Participant, Investigator)|
|Official Title:||Changes in Cognition During a 24-h Simulated Military Operation (SUSOP). Influence of β-alanine Supplementation and Markers of Classical Monocyte Recruitment|
|Actual Study Start Date :||October 2, 2017|
|Actual Primary Completion Date :||April 15, 2018|
|Actual Study Completion Date :||April 15, 2018|
4 g by mouth, 3 times per day with regular meals for 14 days.
Dietary Supplement: beta-alanine
Placebo Comparator: Placebo
4 g by mouth, 3 times per day with regular meals for 14 days.
Dietary Supplement: placebo
rice powder tablet
- Symptoms checklist [ Time Frame: Change from 0 at 12, 18 and 24 hours ]monitor frequency and severity of subjective symptoms related to a broad spectrum of conditions. The participant is presented with 21 symptoms. The participant is required to rate each symptom (e.g. fatigue, headache, Nausea, numbness/tingling etc. on a scale from 0 (Not Present) to 6 (Severe)
- COGcomp (composite measure of cognition) [ Time Frame: Change from 0 at 12, 18 and 24 hours ]
Throughput (TP) scores from each of seven cognitive assessments administered as part of a battery of tests via Automated Neuropsychological Assessment Metrics (ANAM) computer software. Tests include:
- Simple reaction time
- Code Substitution
- Procedural Reaction Time
- Mathematical processing
- Matching to sample
- Code substitution Delayed
- Simple reaction time repeat
- Monocyte chemoattractant protein-1 (MCP-1) [ Time Frame: Change from 0 at 12, 18 and 24 hours ]Serum concentrations of MCP-1
- Macrophage-1-antigen (CD11b) [ Time Frame: Change from 0 at 12, 18 and 24 hours ]Surface expression of CD11b on classical monocytes and neutrophils
- C-C chemokine receptor 2 (CCR2) [ Time Frame: Change from 0 at 12, 18 and 24 hours ]Surface expression of CCR2 on classical monocytes
- Interleukin-8 [ Time Frame: Change from 0 at 12, 18 and 24 hours ]Serum concentrations of interleukin-8
- Lymphocyte function-associated antigen-1 (CD11a) [ Time Frame: Change from 0 at 12, 18 and 24 hours ]Surface expression of CD11a on classical monocytes and neutrophils
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): NCT04250480
|United States, Florida|
|Kinesiology Research Labs|
|Orlando, Florida, United States, 32816|
|Principal Investigator:||Adam J Wells, PhD||University of Central Florida|