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2017 Fiscal Year Annual Research Report

Relashionship between cognitive function and amino acid dynamics in the brain using positron emission tomography in patients udergoing carotid endarterectomy

Research Project

Project/Area Number 15K10313
Research InstitutionIwate Medical University

Principal Investigator

小笠原 邦昭  岩手医科大学, 医学部, 教授 (00305989)

Project Period (FY) 2015-04-01 – 2018-03-31
Keywords頚部頚動脈内膜剥離術 / 認知機能 / 大脳皮質神経受容体 / 脳アミノ酸代謝
Outline of Annual Research Achievements

研究期間内に115例の頚部内頚動脈狭窄に対する内膜剥離術を行った。これら115例に対し、脳血流SPECTを行った。この結果、脳血流が有意に低下している症例25例を選択し本研究の対象とした。123I-iomazenil SPECTおよび18F-Fluoro-α-methyl-L-Tyrosine、trans-1-amino-3-18F-fluorocyclobutanecarboxylic acid (anti-18F-FACBC)、11C-methionineの3核種のアミノ酸を用いたPETを術前後に施行した。さらに、術前後にWAIS-R、WMS-R、Rey testを行い、申請者がすでに発表した方法で術後認知機能改善例と非改善例に振り分けた。術後認知機能改善例は12例であった。SPECTおよびPETの各画像データを画像解析ソフトである3D-SSPに取り込み、術後認知機能非改善例13例を対照として、各術後認知機能改善例で123I-iomazenil SPECTおよび各アミノ酸PET画像の特徴(有意に術後に増加した部位・面積)を算出した。123I-iomazenil SPECTでは術後認知機能非改善例は非改善例に比して、手術側前頭葉を中心としたiomazenil の集積面積が有意に大きかった。3核種のアミノ酸PETでも同意に術後認知機能非改善例は非改善例に比して、手術側前頭葉を中心としたトレーサ の集積面積が有意に大きかった。その中でも、18F-Fluoro-α-methyl-L-Tyrosineの集積変化が認知機能の改善と最も相関があった。123I-iomazenil SPECT上の術後集積増加域と18F-Fluoro-α-methyl-L-Tyrosine PETの集積増加域はほぼ一致していた。
以上より1.頚部内頚動脈狭窄に対する内膜剥離術後の認知機能改善のメカニズムは神経受容体の活動増加によるものである。2.神経受容体の活動増加は脳アミノ酸代謝亢進と関与している。すなわち、血行再建術後に神経受容体の数が増加して、脳機能が改善していることを示唆する。

  • Research Products

    (16 results)

All 2018 2017

All Journal Article (10 results) (of which Peer Reviewed: 10 results,  Open Access: 4 results) Presentation (6 results) (of which Invited: 4 results)

  • [Journal Article] Preoperatively reduced cerebrovascular contractile reactivity to hypocapnia by hyperventilation is associated with cerebral hyperperfusion syndrome after arterial bypass surgery for adult patients with cerebral misery perfusion due to ischemic moyamoya disease2018

    • Author(s)
      Sato S, Kojima D, Shimada Y, Yoshida J, Fujimato K, Fujiwara S, Kobayashi M, Kubo Y, Yoshida K, Terasaki K, Tsutsui S, Miyoshi K, Ogasawara K
    • Journal Title

      J Cereb Blood Flow Metab

      Volume: 印刷中 Pages: 印刷中

    • DOI

      10.1177/0271678X18757621

    • Peer Reviewed
  • [Journal Article] Crossed cerebellar tracer uptake on acute-stage 123I-iomazenil SPECT imaging predicts 3-month functional outcome in patients with non-fatal hypertensive putaminal or thalamic hemorrhage2018

    • Author(s)
      Kojima D, Komoribayashi N, Omama S, Oikawa K, Fujiwara S, Kobayashi M, Kubo Y, Terasaki K, Ogasawara K
    • Journal Title

      Clin Nucl Med

      Volume: 印刷中 Pages: 印刷中

    • DOI

      10.1097/RLU.0000000000002068.

    • Peer Reviewed / Open Access
  • [Journal Article] Preoperative brain temperature imaging on proton magnetic resonance spectroscopy predicts hemispheric ischemia during carotid endarterectomy for unilateral carotid stenosis with inadequate collateral blood flow2018

    • Author(s)
      Tsutsui S, Nanba T, Yoshioka Y, Sasaki M, Fujiwara S, Kobayashi M, Yoshida K, Miyoshi K, Sato S, Ogasawara K
    • Journal Title

      Neurol Res

      Volume: 印刷中 Pages: 印刷中

    • DOI

      10.1080/01616412.2018.1457130.

    • Peer Reviewed
  • [Journal Article] Impact of external carotid artery occlusion at declamping of the external and common carotid arteries during carotid endarterectomy on development of new postoperative ischemic cerebral lesions2018

    • Author(s)
      Kobayashi M, Yoshida K, Kojima D, Oshida S, Fujiwara S, Kubo Y, Ogasawara K
    • Journal Title

      J Vasc Surg

      Volume: 印刷中 Pages: 印刷中

    • Peer Reviewed
  • [Journal Article] Two-year clinical, cerebral hemodynamic and cognitive outcomes of adult patients undergoing medication alone for symptomatically ischemic moyamoya disease without cerebral misery perfusion: a prospective cohort study Neurosurgery2018

    • Author(s)
      Miyoshi K, Chida K, Kobayashi M, Kubo Y, Yoshida K, Terasaki K, Ogasawara K
    • Journal Title

      Neurosurgery

      Volume: 印刷中 Pages: 印刷中

    • Peer Reviewed
  • [Journal Article] Optimal Brain 99mTc-ECD SPECT Imaging and Analysis to Detect Misery Perfusion on 15O PET Imaging in Patients with Chronic Occlusive Disease of Unilateral Major Cerebral Artery2017

    • Author(s)
      Matsumoto Y, Oikawa K, Nomura J, Kojima D, Oshida S, Kobayashi M, Terasaki K, Kubo Y, Ogasawara K
    • Journal Title

      Clin Nucl Med

      Volume: 42 Pages: 499-505

    • DOI

      10.1097/RLU.0000000000001670.

    • Peer Reviewed / Open Access
  • [Journal Article] Preoperative cervical carotid artery contrast-enhanced ultrasound findings are associated with development of microembolic signals on transcranial Doppler during carotid exposure in endarterectomy2017

    • Author(s)
      Oikawa K, Kato T, Oura K, Narumi S, Sasaki S, Fujiwara S, Kobayashi M, Matsumoto Y, Nomura J, Yoshida K, Terayama Y, Ogasawara K
    • Journal Title

      Atherosclerosis

      Volume: 260 Pages: 87-93

    • DOI

      10.1016/j.atherosclerosis.

    • Peer Reviewed / Open Access
  • [Journal Article] Comparison of Three-Dimensional T1-Weighted Magnetic Resonance and Contrast-Enhanced Ultrasound Plaque Images for Severe Stenosis of the Cervical Carotid Artery2017

    • Author(s)
      Shimada Y, Oikawa K, Fujiwara S, Ogasawara Y, Sato Y, Narumi S, Kato T, Oura K, Terayama Y, Sasaki M, Fujimoto K, Yoshida J, Ogasawara K
    • Journal Title

      J Stroke Cerebvasc Dis

      Volume: 26 Pages: 1916-1922

    • DOI

      10.1016/j.jstrokecerebrovasdis.

    • Peer Reviewed
  • [Journal Article] Apparent brain temperature imaging with multi-voxel proton magnetic resonance spectroscopy compared with cerebral blood flow and metabolism imaging on positron emission tomography in patients with unilateral chronic major cerebral artery steno-occlusive disease2017

    • Author(s)
      Nanba T, Nishimoto H, Yoshioka Y, Murakami T, Sasaki M, Uwano I, Fujiwara S, Terasaki K, Ogasawara K
    • Journal Title

      Neuroradiology

      Volume: 59 Pages: 923-935

    • DOI

      10.1007/s00234-017-1890-3.

    • Peer Reviewed
  • [Journal Article] Preoperative Cerebral Oxygen Extraction Fraction Imaging Generated from 7-Tesla Magnetic Resonance Quantitative Susceptibility Mapping Predicts Development of Cerebral Hyperperfusion Following Carotid Endarterectomy2017

    • Author(s)
      Nomura J, Uwano I, Sasaki M, Kudo K, Yamashita F, Ito K, Fujiwara S, Kobayashi M, Ogasawara K
    • Journal Title

      AJNR Am J Neuroradiol

      Volume: 38 Pages: 2327-2333

    • DOI

      10.3174/ajnr.A5390.

    • Peer Reviewed / Open Access
  • [Presentation] 頚動脈内膜剥離術の要点2018

    • Author(s)
      小笠原邦昭
    • Organizer
      第47回日本脳卒中の外科学会学術集会
    • Invited
  • [Presentation] 頚部内頚動脈狭窄症に対する血行再建術の認知機能に与える影響2018

    • Author(s)
      小笠原邦昭
    • Organizer
      STROKE2018
    • Invited
  • [Presentation] 脳血流SPECTにおけるCrossed Cerebellar Diaschisisの臨床意義2017

    • Author(s)
      小笠原邦昭
    • Organizer
      第60回日本脳循環代謝学会学術集会
    • Invited
  • [Presentation] 脳血管障害における脳SPECTはこう使う!!2017

    • Author(s)
      小笠原邦昭
    • Organizer
      第57回日本核医学会学術総会
    • Invited
  • [Presentation] 高齢者頚部頚動脈狭窄症に対する外科的血行再建術2017

    • Author(s)
      小笠原邦昭
    • Organizer
      第4回日本心血管脳卒中学会学術集会
  • [Presentation] 脳血管障害における脳血流SPECT画像はこう読む!!2017

    • Author(s)
      小笠原邦昭
    • Organizer
      第37回日本脳神経外科コングレス総会

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Published: 2018-12-17  

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