Reversible, reproducible reduction of brain water apparent diffusion coefficient by cortical electroshocks

1997 ◽  
Vol 37 (1) ◽  
pp. 1-6 ◽  
Author(s):  
Jianhui Zhong ◽  
Ognen A. C. Petroff ◽  
Lisa A. Pleban ◽  
John C. Gore ◽  
James W. Prichard
Keyword(s):  
Diffusion Coefficient ◽  
Apparent Diffusion Coefficient ◽  
Apparent Diffusion ◽  
Brain Water

scholarly journals Erythropoietin Protects from Post-Traumatic Edema in the Rat Brain

2007 ◽  
Vol 27 (7) ◽  
pp. 1369-1376 ◽  
Author(s):  
Olivier Verdonck ◽  
Hana Lahrech ◽  
Gilles Francony ◽  
Olivier Carle ◽  
Régine Farion ◽  
...  
Keyword(s):  
Diffusion Coefficient ◽  
Apparent Diffusion Coefficient ◽  
Brain Edema ◽  
Acceleration Model ◽  
Apparent Diffusion ◽  
Post Traumatic ◽  
Biochemical Mechanisms ◽  
Impact Acceleration ◽  
Magnetic Resonance Imaging Mri ◽  
Brain Water

Erythropoietin (Epo) is gaining interest in various neurological insults as a possible neuroprotective agent. We determined the effects of recombinant human Epo (rhEpo, 5000 IU per kg bw) on brain edema induced in rats by traumatic brain injury (TBI; impact-acceleration model; rhEpo administration 30 mins after injury). Magnetic resonance imaging (MRI) and a gravimetric technique were applied. In the MRI experiments, the apparent diffusion coefficient (ADC) and the tissue T1 relaxation time were measured hourly in the neocortex and caudoputamen, during a 6 h time span after TBI. In the gravimetric experiments, brain water content (BWC) was determined in these two regions, 6 h after TBI. Apparent diffusion coefficient measurements showed that rhEpo decreased brain edema early and durably. Gravimetric measurements showed that rhEpo decreased BWC at H6 in the neocortex as well as in the caudoputamen. No significant differences in ADC, in T1, or in BWC were found between rhEpo treated-TBI rats and sham-operated rats. Our findings show that post-traumatic administration of rhEpo can significantly reduce the development of brain edema in a model of diffuse TBI. Further studies should be conducted to identify the biochemical mechanisms involved in these immediate effects and to assess the use of rhEpo as a possible therapy for post-traumatic brain edema.

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