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Non-invasive Clinical Imaging of Cerebral Metabolism Following Brain Injury Using 13C Magnetic Resonance Spectroscopy.

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. Identifier: NCT02745210
Recruitment Status : Terminated (The acquisition sequence was incompatible with MRI hardware)
First Posted : April 20, 2016
Results First Posted : December 31, 2020
Last Update Posted : December 31, 2020
Information provided by (Responsible Party):
Brenda Bartnik Olson, PhD, Loma Linda University

Brief Summary:

Despite the decline in fatal traumatic brain injury (TBI) incidence in recent years, TBI morbidity remains a public health challenge and is the leading cause of disability in the United States. Detailed knowledge of the metabolic alterations following TBI will provide a significant advancement to our understanding of the hypometabolic response to TBI, which is key information for the future development and testing of novel therapeutic interventions that by-pass or compensate for the metabolic dysfunction.

The goal of this study is to determine the clinical utility of in vivo 13C MRS to identify specific metabolic alterations following TBI. We hypothesize that following TBI, metabolic pathways are altered causing an incomplete oxidative of glucose in neurons and astrocytes resulting in a decrease in cerebral metabolism.

Condition or disease Intervention/treatment Phase
Traumatic Brain Injury Diagnostic Test: 13C magnetic resonance spectroscopy Not Applicable

Detailed Description:
Despite the decline in fatal traumatic brain injury (TBI) incidence in recent years, TBI morbidity remains a public health challenge and is the leading cause of disability in the United States To combat these effects, new research is needed to identify mechanisms of injury that will lead to potential targets for therapeutic interventions that improve neurological outcome. One promising area of research is the cerebral metabolic dysfunction following TBI. Studies of post-traumatic cerebral metabolism have shown that cerebral metabolic rate of glucose (CMRglc) decreases for a period of days, weeks or months after injury with the duration and degree of hypometabolism correlating to level of consciousness and a strong predictor of long-term neurological outcome. However, specific changes in intermediary carbohydrate metabolic pathways have not yet been identified. In addition, the role of astrocyte metabolism in the post-injury metabolism has not been studied. This study uses in vivo 13C magnetic resonance spectroscopy (MRS) at 3 Tesla, a novel method in the clinical study of TBI, to non-invasively study the metabolic fate and flux of glucose (metabolized in both neurons and astrocytes) and acetate (metabolized in astrocytes) through metabolic pathways during the hypometabolic period.

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Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 9 participants
Allocation: N/A
Intervention Model: Single Group Assignment
Masking: None (Open Label)
Primary Purpose: Basic Science
Official Title: Non-invasive Clinical Imaging of Cerebral Metabolism Following Brain Injury Using 13C Magnetic Resonance Spectroscopy
Actual Study Start Date : September 2009
Actual Primary Completion Date : February 2019
Actual Study Completion Date : February 2019

Arm Intervention/treatment
Experimental: Experimental
13C Magnetic resonance (MR) spectroscopy.
Diagnostic Test: 13C magnetic resonance spectroscopy
acquisition of 13C MR spectroscopy in the brain
Other Name: 13C MRS

Primary Outcome Measures :
  1. Detection of 13C Enriched Cerebral Metabolites [ Time Frame: 5 years ]
    Direct detection, localized in vivo 13C MRS will be used to measure the 13C enrichment of glutamate and glutamine following an infusion of 30% isotopically enriched [1-13C] glucose and [1, 2-13C2] acetate.

Information from the National Library of Medicine

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Ages Eligible for Study:   18 Years to 65 Years   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  1. Subjects will be at least 18 years of age without gender or ethnic restrictions.
  2. Severe accidental TBI defined as the lowest post-resuscitation GCS < 8 prior to administration of sedatives or paralytics.
  3. Eligibility for MRI per routine screening checklist.

Exclusion Criteria:

  1. History of neurosurgical intervention, excluding the placement of ventriculostomy shunt
  2. History of a prior known brain injury with associated loss of consciousness.
  3. History of a known neurological disorder prior to qualifying injury.
  4. History of psychiatric disorder.
  5. History of diabetes or current unstable serum glucose level.
  6. Renal insufficiency or known history of kidney disease.
  7. Known contraindication to MRI such as, pacemaker, pregnancy, and/or other non-MR compatible implanted device.
  Study Documents (Full-Text)

Documents provided by Brenda Bartnik Olson, PhD, Loma Linda University:
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Responsible Party: Brenda Bartnik Olson, PhD, Principal Investigator, Loma Linda University Identifier: NCT02745210    
Other Study ID Numbers: 59093
First Posted: April 20, 2016    Key Record Dates
Results First Posted: December 31, 2020
Last Update Posted: December 31, 2020
Last Verified: December 2020
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD: No
Additional relevant MeSH terms:
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Brain Injuries
Brain Injuries, Traumatic
Wounds and Injuries
Brain Diseases
Central Nervous System Diseases
Nervous System Diseases
Craniocerebral Trauma
Trauma, Nervous System