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2016 ; 6
(ä): 27250
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Synchrotron X-ray microtransections: a non invasive approach for epileptic
seizures arising from eloquent cortical areas
#MMPMID27264273
Pouyatos B
; Nemoz C
; Chabrol T
; Potez M
; Bräuer E
; Renaud L
; Pernet-Gallay K
; Estève F
; David O
; Kahane P
; Laissue JA
; Depaulis A
; Serduc R
Sci Rep
2016[Jun]; 6
(ä): 27250
PMID27264273
show ga
Synchrotron-generated X-ray (SRX) microbeams deposit high radiation doses to
submillimetric targets whilst minimizing irradiation of neighboring healthy
tissue. We developed a new radiosurgical method which demonstrably transects
cortical brain tissue without affecting adjacent regions. We made such
image-guided SRX microtransections in the left somatosensory cortex in a rat
model of generalized epilepsy using high radiation doses (820?Gy) in thin
(200??m) parallel slices of tissue. This procedure, targeting the brain volume
from which seizures arose, altered the abnormal neuronal activities for at least
9 weeks, as evidenced by a decrease of seizure power and coherence between tissue
slices in comparison to the contralateral cortex. The brain tissue located
between transections stayed histologically normal, while the irradiated
micro-slices remained devoid of myelin and neurons two months after irradiation.
This pre-clinical proof of concept highlights the translational potential of
non-invasive SRX transections for treating epilepsies that are not eligible for
resective surgery.