Glutamate concentration in the brain of individuals with autism: A proton magnetic resonance spectroscopy study.

• Project/Area Number: 22591281
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Psychiatric science
• Research Institution: Hamamatsu University School of Medicine
• Principal Investigator: YOSHIHARA Yujiro 浜松医科大学, 医学部, 特任研究員 (00529464)
• Co-Investigator(Kenkyū-buntansha): SUZUKI Katuaki 浜松医科大学, 医学部, 准教授 (00285040) ; IWATA Yasuhide 浜松医科大学, 医学部附属病院, 講師 (10285025) ; TSUCHIYA Kenji 浜松医科大学, 子どものこころの発達研究センター, 准教授 (20362189) ; MATSUMOTO Kaori 浜松医科大学, 子どものこころの発達研究センター, 助教 (40432207) ; TAKEBAYASHI Kiyokazu 浜松医科大学, 医学部附属病院, 講師 (50397428) ; 松本 かおり 浜松医科大学, 子どものこころの発達研究センター, 助教 (20447808) ; 中村 和彦 弘前大学, 医学(系)研究科(研究院), 教授 (80263911)
• Project Period (FY): 2010 – 2012
• Project Status: Completed (Fiscal Year 2012)
• Budget Amount: ¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000); Fiscal Year 2012: ¥260,000 (Direct Cost: ¥200,000、Indirect Cost: ¥60,000); Fiscal Year 2011: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2010: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
• Keywords: 児童 / 思春期精神医学 / 分子イメージング / 自閉症 / 磁気共鳴スペクトル法 / グルタミン酸 / 脳構造 / 拡散テンソル画像法 / MRS / 拡散強調画像 / 核磁気共鳴スペクトロスコピー / 拡散強調テンソル画像

Research Abstract

The aim of the present study was to examine possible alterations in the glutamatergic neurotransmitter system in the autistic brain by means of magnetic resonance spectroscopy (MRS). We measured concentrations of glutamate and glutamine as well as major metabolites such as N-acetylaspartate, choline, and creatine by MRS using 3-T scanner in 35 non-medicated subjects with autism and 35 age- and sex-matched controls. Regions of interest were placed over the cerebellar vermis, medial frontal cortices, basal ganglia, and amygdala -hippocampal complex. As a result, there was no significant difference in concentrations of any of metabolites throughout regions of interest measured between subjects with autism and controls. The current MRSstudy failed to support alterations in the glutamatergic neurotransmission in autism reported by some previous studies.

Research Products

• [Journal Article] Microglial activation in young adults with autism spectrum disorder (2013)
  • Author(s): Suzuki K
  • Journal Title: JAMA Psychiatry Volume: 70 Issue: 1 Pages: 49-58
  • DOI: 10.1001/jamapsychiatry.2013.272
  • Peer Reviewed
• [Journal Article] Effects of brain amyloid deposition and reduced glucose metabolism on the default mode of brain function in normal aging (2011)
  • Author(s): Kikuchi M, Hirosawa T, Yokokura M, Yagi S, Mori N, Yoshikawa E, Yoshihara Y, Sugihara G, Takebayashi K, Iwata Y, Suzuki K, Nakamura K, Ueki T, Minabe Y, Ouchi Y
  • Journal Title: Neurosci Volume: 31 Issue: 31 Pages: 11193-9
  • DOI: 10.1523/jneurosci.2535-11.2011
  • Peer Reviewed
• [Journal Article] Plasma cytokine profiles in subjects with high-functioning autism spectrum disorders (2011)
  • Author(s): Suzuki K, Matsuzaki H, Iwata K, Kameno Y, Shimmura C, Kawai S, Yoshihara Y, Wakuda T, Takebayashi K, Takagai S, Matsumoto K, Tsuchiya KJ, Iwata Y, Nakamura K, Tsujii M, Sugiyama T, Mori N
  • Journal Title: PLoS One Volume: 6(5)(電子版)
  • Peer Reviewed
• [Journal Article] Reduced acethlcholinesterase activity in the fusiform gyrus in adults with autism spectrum disorders. (2011)
  • Author(s): Suzuki K, Sugihara G, Ouchi Y, Nakamura K, Tsujii M, Futatsubashi M, Iwata Y, Tsuchiya KJ, Matsumoto K, Takebayashi K, Wakuda T, Yoshihara Y, Suda S, Kikuchi M, Takei N, Sugiyama T, Irie T, Mori N
  • Journal Title: Arch Gen Psychiatry Volume: 68(3) Pages: 306-313
  • Peer Reviewed
• [Journal Article] In vivo changes in microglial activation and amyloid deposits in brain region with hypometabolism in Alzheimer's disease. (2011)
  • Author(s): Yokokura M, Mori N, Yagi S, Yoshikawa E, Kikuchi M, Yoshihara Y, Wakuda T, Sugihara G, Takebayashi K, Suda S, Iwata Y, Ueki T, Tsuchiya KJ, Suzuki K, Nakamura K, Ouchi Y.
  • Journal Title: Eur J Nucl Med Mol Imaging Volume: 38(2) Pages: 343-351
  • Peer Reviewed
• [Journal Article] Metabolite alterations in the hippocampus of high-functioning adult subjects with autism (2010)
  • Author(s): Suzuki K, Nishimura K, Sugihara G, Nakamura K, Tsuchiya KJ, Matsumoto K, Takebayashi K, Isoda H, Sakahara H,Sugiyama T, Tsujii M, Takei N, Mori N
  • Journal Title: Int J Neuropsychopharmacol Volume: 13 Pages: 529-534
  • NAID: 120005305395
• [Journal Article] Progression from unilateral to bilateral parkinsonism in early Parkinson deisease : implication of mesocortical dopamine dysfunction by PET (2010)
  • Author(s): Yagi S, Yoshikawa E, Futatsubashi M, Yokokura M, Yoshihara Y, Torizuka T, Ouchi Y.
  • Journal Title: J Nucl Med Volume: 51(8) Pages: 1250-1257
  • Peer Reviewed
• [Presentation] Discrimination of Autistic Adults from Controls using data on Whole-Brain MRI in a Japanese Sample (2011)
  • Author(s): Yuiiro Yoshihara
  • Organizer: Human Bran Mapping 2011
  • Place of Presentation: Quebec City, Canada
• [Remarks]
  • URL: http://www2.hama-med.ac.jp/wlb/psy/index.html
• [Remarks]
  • URL: http://www2.hama-med.ac.jp/w1b/psy/index.html