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Mild TBI Results in a Long-Term Decrease in Circulating Phospholipids in a Mouse Model of Injury

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An Author Correction to this article was published on 20 February 2020

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Abstract

Neurophysiological and neurological dysfunction is usually experienced for a short period of time in patients with mild traumatic brain injury (mTBI). However, around 15 % of patients exhibit symptoms months after TBI. Phospholipid (PL) changes have been observed in plasma from mTBI patients at chronic stages, suggesting a role in TBI pathology. We examined long-term plasma phospholipid profiles in a mouse model of mTBI to determine their translational value in reproducing PL changes observed in mTBI patients. Plasma samples were collected at an acute timepoint (24 h post-injury) and at several chronic stages (3, 6, 12 and 24 months post-injury) from injured mice and sham controls. Phospholipids were identified and quantified using liquid chromatography/mass spectrometry analysis. In accordance with human data, we observed significantly lower levels of several major PL classes in mTBI mice compared to controls at chronic timepoints. Saturated, monounsaturated and polyunsaturated fatty acids (PUFAs) were differently regulated over time. As PUFA levels were decreased at 3 months, we measured levels of malondialdehyde to assess lipid peroxidation, which we found to be elevated at this timepoint. Ether-containing PE species were elevated at 24 h post-injury and decreased relative to controls at chronic stages. Arachidonic acid and docosahexaenoic acid-containing species were significantly decreased within all PL classes at the chronic stages. Our findings are similar to changes in PL levels observed in human mTBI subjects. Chronic TBI biomarkers have received little attention, even though disabilities at this stage can be of major importance. Our study provides information on biochemical abnormalities that persist long after the initial injury; these abnormalities may provide useful insight into the continuing pathogenesis and serve as diagnostic biomarkers.

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Change history

  • 20 February 2020

    The original version of this article unfortunately contained a mistake. Gary S. Laco should not be listed as an author in the author group.

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Acknowledgments

This research was funded by Department of Defense Awards (W81XWH-10-1-0759 and W81XWH-13-1-0253) and VA Research Award (RX-16-007) to VA Research Career scientist Dr. Fiona Crawford and by the Roskamp Foundation. The contents do not represent the views of the Department of Veterans Affairs, or the US Government.

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Authors and Affiliations

  1. The Roskamp Institute, 2040 Whitfield Avenue, Sarasota, FL, 34243, USA

    Tanja Emmerich, Laila Abdullah, Joseph Ojo, Benoit Mouzon, Thinh Nguyen, Gary S. Laco, Gogce Crynen, James E. Evans, Jon Reed, Michael Mullan & Fiona Crawford

  2. The Open University, Walton Hall, Milton Keynes, Buckinghamshire, MK7 6AA, UK

    Tanja Emmerich, Laila Abdullah, Joseph Ojo, Benoit Mouzon, Gogce Crynen & Fiona Crawford

  3. James A. Haley Veteran’s Hospital, 13000 Bruce B. Downs Blvd., Tampa, FL, 33612, USA

    Tanja Emmerich, Laila Abdullah, Benoit Mouzon, James E. Evans, Jon Reed & Fiona Crawford

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  1. Tanja Emmerich
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  2. Laila Abdullah
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Correspondence to Tanja Emmerich.

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Emmerich, T., Abdullah, L., Ojo, J. et al. Mild TBI Results in a Long-Term Decrease in Circulating Phospholipids in a Mouse Model of Injury. Neuromol Med 19, 122–135 (2017). https://doi.org/10.1007/s12017-016-8436-4

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  • DOI: https://doi.org/10.1007/s12017-016-8436-4

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