Association of Amino Acid Prevalence and Chronic Brain Injury
| Status: | Completed |
|---|---|
| Conditions: | Neurology |
| Therapuetic Areas: | Neurology |
| Healthy: | No |
| Age Range: | 35 - 70 |
| Updated: | 4/21/2016 |
| Start Date: | December 2013 |
| End Date: | December 2014 |
Years after a suffering a brain injury, individuals remain in a physically and cognitively
impaired state. The investigators believe that the concentrations of amino acids in the
blood are chronically altered and yield negative effects on the individuals health.
Preliminary data has shown significantly lower concentrations of amino acids in serum
samples from the TBI population, these diminished levels of amino acids may be due to
changes in the microbiome. Understanding these changes will help guide rehabilitative
services for this population. Individuals with a chronic brain injury will donate samples of
blood, oral tissue, and fecal matter to be compared to that of non-injured individuals.
Genetic information from the hosts will be striped and discarded; participant's genetic
information will not be retained. To better understand changes in the microbiome, any
history of antibiotics and probiotics will be assessed.
impaired state. The investigators believe that the concentrations of amino acids in the
blood are chronically altered and yield negative effects on the individuals health.
Preliminary data has shown significantly lower concentrations of amino acids in serum
samples from the TBI population, these diminished levels of amino acids may be due to
changes in the microbiome. Understanding these changes will help guide rehabilitative
services for this population. Individuals with a chronic brain injury will donate samples of
blood, oral tissue, and fecal matter to be compared to that of non-injured individuals.
Genetic information from the hosts will be striped and discarded; participant's genetic
information will not be retained. To better understand changes in the microbiome, any
history of antibiotics and probiotics will be assessed.
The purpose of this study is to evaluate the levels of Amino Acids in adult individuals with
chronic (> 2 years) traumatic brain injury (TBI) when compared to a non-brain injured cohort
population.
Preliminary data from an assay of amino acids in individuals with chronic TBI compared to an
assay of individuals without a TBI revealed significantly lower concentrations of amino
acids within the TBI group.
The composition and structure of the oral and fecal microbiome will be determined by 16S
rDNA sequencing. Taxonomic and community structure profiles will be treated as outcome
variables and modeled together with the participant's plasma amino acid concentration, years
post-injury, age, sex and other variables to determine correlations. These correlations may
improve our understanding of the diminished amino acid metabolism within the chronic TBI
population.
The endpoint will identify the microbiome structure and composition by 16S rRNA gene
sequencing within the TBI and healthy participants and to assess the participant's amino
acid concentrations and other participant demographics and phenotypic characteristics (years
post-injury, age, sex). This comparison may improve our understanding of the diminished
amino acid metabolism within the chronic TBI population.
chronic (> 2 years) traumatic brain injury (TBI) when compared to a non-brain injured cohort
population.
Preliminary data from an assay of amino acids in individuals with chronic TBI compared to an
assay of individuals without a TBI revealed significantly lower concentrations of amino
acids within the TBI group.
The composition and structure of the oral and fecal microbiome will be determined by 16S
rDNA sequencing. Taxonomic and community structure profiles will be treated as outcome
variables and modeled together with the participant's plasma amino acid concentration, years
post-injury, age, sex and other variables to determine correlations. These correlations may
improve our understanding of the diminished amino acid metabolism within the chronic TBI
population.
The endpoint will identify the microbiome structure and composition by 16S rRNA gene
sequencing within the TBI and healthy participants and to assess the participant's amino
acid concentrations and other participant demographics and phenotypic characteristics (years
post-injury, age, sex). This comparison may improve our understanding of the diminished
amino acid metabolism within the chronic TBI population.
Inclusion Criteria:
- Willing to donate 10 ml of blood
- Willing to donate oral tissue sample
- Willing to donate fecal sample
Exclusion Criteria:
- (for brain injured group) have a chronic (greater than two years) traumatic brain
injury.
- Unable to provide to give voluntary informed consent
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