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著作: Shukuri Miho/Mawatari Aya/Takatani Shuhei/[田原 強]/Inoue Michiko/Arakaki Wakako/Ohno Masahiro/Doi Hisashi/Onoe Hirotaka/Synthesis and preclinical evaluation of 18F-FKTP methyl ester as a radiotracer for COX-1 imaging in neuroinflammation/[Journal of Nuclear Medicine]

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EID
394410
EOID
1077093
Map
0
LastModified
2023年6月8日(木) 20:58:04
Operator
大家 隆弘
Avail
TRUE
Censor
承認済
Owner
田原 強
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種別 必須 学術論文(審査論文)
言語 必須 英語
招待 推奨
審査 推奨
カテゴリ 推奨
共著種別 推奨
学究種別 推奨
組織 推奨
著者 必須
  1. (英) Shukuri Miho
    役割 任意
    貢献度 任意
    学籍番号 推奨
  2. (英) Mawatari Aya
    役割 任意
    貢献度 任意
    学籍番号 推奨
  3. (英) Takatani Shuhei
    役割 任意
    貢献度 任意
    学籍番号 推奨
  4. 田原 強([徳島大学.先端研究推進センター.バイオイメージング研究部門])
    役割 任意
    貢献度 任意
    学籍番号 推奨
  5. (英) Inoue Michiko
    役割 任意
    貢献度 任意
    学籍番号 推奨
  6. (英) Arakaki Wakako
    役割 任意
    貢献度 任意
    学籍番号 推奨
  7. (英) Ohno Masahiro
    役割 任意
    貢献度 任意
    学籍番号 推奨
  8. (英) Doi Hisashi
    役割 任意
    貢献度 任意
    学籍番号 推奨
  9. (英) Onoe Hirotaka
    役割 任意
    貢献度 任意
    学籍番号 推奨
題名 必須

(英) Synthesis and preclinical evaluation of 18F-FKTP methyl ester as a radiotracer for COX-1 imaging in neuroinflammation

副題 任意
要約 任意

(英) Cyclooxygenase (COX) is a rate-limiting enzyme in the synthesis of proinflammatory prostanoids from arachidonic acid. In vivo imaging of COX by PET is a potentially powerful tool for assessing the inflammatory response to injury, infection, and disease. We previously reported on a promising PET probe for COX imaging, C-labeled ketoprofen methyl ester, which can detect COX-1 activation in models of neuroinflammation and neurodegenerative disorders. In the current study, we aimed to design a fluorine-substituted benzoyl group of ketoprofen (FKTP) and to evaluate its racemate and enantiomers (F-labeled ketoprofen methyl ester, [F]FKTP-Me) as PET proradiotracers, potential radiopharmaceuticals for in vivo PET study of COX-1. We performed nucleophilic aromatic F-fluorination to obtain the desired racemic radiolabeled probe, ()-[F]FKTP-Me, at a radiochemical yield of 11%-13%. Subsequent high-performance liquid chromatography separation with a chiral column yielded the desired enantiomerically pure ()- and ()-[F]FKTP-Me. We examined the in vivo properties of ()-, ()-, and ()-[F]FKTP-Me in PET studies using rats in which hemispheric inflammation was induced by intrastriatally injecting a lipopolysaccharide. Racemic ()-[F]FKTP-Me and enantiomeric ()- or ()-[F]FKTP-Me were synthesized with radiochemical and chemical purities of more than 99%. The metabolite analysis revealed that the racemic ()-[F]FKTP-Me crossed the blood-brain barrier and entered the brain, where it was subsequently hydrolyzed to its pharmacologically active acid form. PET images revealed a high accumulation of ()-, ()-, and ()-[F]FKTP in the inflamed regions in rat brain. Moreover, the accumulated radioactivity of ()-[F]FKTP-Me was higher than that of ()-[F]FKTP-Me and ()-[F]FKTP-Me, which was correlated with the stereospecific inhibitory activity of FKTP against COX-1. From the results of this study, we conclude that racemic ()-[F]FKTP-Me and its enantiomers could act as proradiotracers of neuroinflammation in rat brain by the association of their hydrolyzed acid forms with COX-1 in inflamed regions. In particular, ()-[F]FKTP-Me demonstrated suitable properties as a COX-1-specific probe in PET imaging of neuroinflammation.

キーワード 推奨
  1. (英) Animals
  2. (英) Rats
  3. (英) Cyclooxygenase 1
  4. (英) Ketoprofen
  5. (英) Neuroinflammatory Diseases
  6. (英) Positron-Emission Tomography
  7. (英) Radiopharmaceuticals
発行所 推奨
誌名 必須 Journal of Nuclear Medicine(Society of Nuclear Medicine)
(pISSN: 0161-5505, eISSN: 1535-5667)
ISSN 任意 1535-5667
ISSN: 0161-5505 (pISSN: 0161-5505, eISSN: 1535-5667)
Title: Journal of nuclear medicine : official publication, Society of Nuclear Medicine
Title(ISO): J Nucl Med
Publisher: Society of Nuclear Medicine and Molecular Imaging
 (NLM Catalog  (Scopus  (CrossRef (Scopus information is found. [need login])
必須 63
必須 11
必須 1761 1767
都市 任意
年月日 必須 2022年 11月 初日
URL 任意
DOI 任意 10.2967/jnumed.121.263713    (→Scopusで検索)
PMID 任意 35332095    (→Scopusで検索)
CRID 任意
WOS 任意
Scopus 任意
評価値 任意
被引用数 任意
指導教員 推奨
備考 任意
  1. (英) Article.ELocationID: 10.2967/jnumed.121.263713

  2. (英) Article.PublicationTypeList.PublicationType: Journal Article

  3. (英) Article.PublicationTypeList.PublicationType: Research Support, Non-U.S. Gov't

  4. (英) KeywordList.Keyword: COX-1

  5. (英) KeywordList.Keyword: PET

  6. (英) KeywordList.Keyword: [18F]FKTP-Me

  7. (英) KeywordList.Keyword: neuroinflammation