Abstract:
:We performed positron emission tomography (PET) with [11C]deuterium-deprenyl in 9 patients with temporal lobe epilepsy (TLE) undergoing evaluation for possible epilepsy surgery. Seven patients had unilateral and 2 had bilateral mesiotemporal epileptic foci based on the preoperative investigation including ictal EEG discharges and PET with 2-[18F]fluoro-2-deoxyglucose (FDG). Deprenyl is an irreversible inhibitor of monoamine oxidase type B (MAO-B) with a very high affinity for the enzyme. In the brain, MAO-B is preferentially located in astrocytes, and a previous in vitro study showed increased binding of the ligand in sclerotic hippocampi. Dynamically acquired N-[methyl-11C]-a,a-di-deutero-L-deprenyl distribution in PET images were analyzed graphically, and the focus regions were assessed visually on the PET images. In addition, the accumulation rate and distribution volume of the tracer relative to the cerebellar cortex were measured in standardized homologous temporal regions by semiquantitative methods. Uptake of [11C]deuterium-deprenyl was significantly increased in the epileptogenic temporal lobes, both apparently and semiquantitatively. By calculating mean interlobar ratios, we identified the temporal lobe containing the epileptic focus in six unilateral cases. One case was ambiguous but was not falsely localized. The two bilateral cases were correctly identified as such. Our results suggest that PET with [11C]deuterium-deprenyl might be a useful method for identification of epileptogenic temporal lobes.
journal_name
Epilepsiajournal_title
Epilepsiaauthors
Kumlien E,Bergström M,Lilja A,Andersson J,Szekeres V,Westerberg CE,Westerberg G,Antoni G,Långström Bdoi
10.1111/j.1528-1157.1995.tb01051.xsubject
Has Abstractpub_date
1995-07-01 00:00:00pages
712-21issue
7eissn
0013-9580issn
1528-1167journal_volume
36pub_type
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