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Long-term consequences of single and multiple mild blast exposure on select physiological parameters and blood-based

Farid A Ahmed1, Alaa Kamnaksh, Erzsebet Kovesdi

  • 1Department of Anatomy, Physiology and Genetics, Uniformed Services University, Bethesda, MD 20814, USA.

Electrophoresis
|May 29, 2013
PubMed

Insights

Repeated mild traumatic brain injuries (mTBI) cause cumulative damage. Even without statistically significant differences, multiple injuries showed more inflammation markers than single injuries in rats.

Area of Science:

  • Neuroscience
  • Pathobiology
  • Proteomics

Background:

  • Mild traumatic brain injury (mTBI) and repeated mTBI (rmTBI) can cause progressive neurodegeneration and neuropsychiatric issues.
  • Understanding long-term pathobiological changes from mTBI and rmTBI is crucial.

Purpose of the Study:

  • To investigate the long-term pathobiological consequences of single versus repeated mild blast overpressure injuries in a rat model.
  • To identify lasting physiological and plasma biomarker changes at 42 days post-injury.

Main Methods:

  • Rats were exposed to single or repeated (5 total) mild blast overpressure.
  • Physiological parameters were monitored.
  • Plasma biomarkers were analyzed using proteomics at 42 days post-injury.

Main Results:

  • Both single-injured (SI) and multiple-injured (MI) rats showed lasting oxidative stress, vascular abnormalities, and neuronal/glial cell loss.
  • Comparable changes in arterial oxygen saturation and heart rate were observed between SI and MI rats.
  • MI rats displayed a trend towards higher plasma inflammatory markers compared to SI rats, though not statistically significant.

Conclusions:

  • The frequency of blast exposure is a key factor in the cumulative damage associated with rmTBI.
  • rmTBI induces persistent pathobiological alterations, with a tendency for increased inflammation markers after repeated exposures.
Keywords:
Animal modelsBrain traumaExperimentalPhysiologyProteomics

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