title: Neural damage due to temporal lobe epilepsy: dual-nuclei (proton and phosphorus) magnetic resonance spectroscopy study.
abstract: The aim of this study was to evaluate the usefulness of proton and phosphorus (1H and 31P) magnetic resonance spectroscopy (MRS) for temporal lobe epilepsy (TLE) patients, and to evaluate neural damage and metabolite dysfunction in the TLE patient brain. We performed 1H and 31P MRS of medial temporal lobes (MTL) in the same TLE patients (n = 14) with a relatively wide range of severity from almost seizure-free to intractable, and calculated the ratio of N-acetylasparate to choline-containing compounds and creatine + phosphocreatine (NAA/Cho + Cr) in 1H MRS and inorganic phosphate to all main peaks (%Pi) in 31P MRS. There was no significant correlation between NAA/(Cho + Cr) and %Pi in each side (ipsilateral, r = -0.20; contralateral, r =-0.19). The values of NAA/(Cho + Cr) showed a significant difference between ipsilateral and contralateral MTLs to the focus of TLE patients (P < 0.01, paired t-test). Although %Pi also had a tendency to show the laterality of TLE, there was no significance. Ipsilateral (r = -0.90, P < 0.0001) and contralateral (r = -0.70, P < 0.005) NAA/(Cho + Cr) decreases and contralateral %Pi increase (r = 0.81, P < 0.001) had significant correlation with seizure frequency. 1H MRS provides more important information concerning neuronal dysfunction in MTL of TLE patients than 31P MRS.
authors.affiliation: Department of Medical Imaging, National Institute of Radiological Sciences, Chiba, Japan. t_obata@nirs.go.jp
authors.forename: Takayuki
authors.initials: T
authors.lastname: Obata
authors.forename: Yasuhiro
authors.initials: Y
authors.lastname: Someya
authors.forename: Tetsuya
authors.initials: T
authors.lastname: Suhara
authors.forename: Yoshihisa
authors.initials: Y
authors.lastname: Ota
authors.forename: Kimiyoshi
authors.initials: K
authors.lastname: Hirakawa
authors.forename: Hiroo
authors.initials: H
authors.lastname: Ikehira
authors.forename: Shuji
authors.initials: S
authors.lastname: Tanada
authors.forename: Yoshiro
authors.initials: Y
authors.lastname: Okubo
mesh_terms: D000328:Adult; D004833:Epilepsy, Temporal Lobe / Q000150:complications* / Q000473:pathology*; D005260:Female; D006801:Humans; D009682:Magnetic Resonance Spectroscopy; D008297:Male; D009474:Neurons / Q000473:pathology*; D010759:Phosphorus Isotopes; D011522:Protons; D013702:Temporal Lobe / Q000473:pathology*
chemical_list: D010759:Phosphorus Isotopes; D011522:Protons