Updated on 2026/10/03

写真a

 
Okihara Kaori
 
Affiliation
Faculty of Medicine, Department of Medicine, Research Laboratory for Magnetic Resonance, Assistant Professor
Title
Assistant Professor
External link

Degree

  • 農学修士(山口大学)

Education

  • 山口大学大学院   農学研究科   農芸化学専攻

    1996.3

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Research History

Professional Memberships

Papers

  • Proton Nuclear Magnetic Resonance With Time-Frequency Analysis: A Potential Diagnostic Approach for Keloids. International journal

    Guangpeng Xia, Teruyuki Dohi, Keiko Hirakawa, Kaori Okihara, Ei Hiruma, Shun Minagawa, Mohamed Abdelhakim, Tomoko Konta, Nikki Terashi, Yoshimasa Kanawaku, Rei Ogawa

    International wound journal   23 ( 3 )   e70865   2026.3

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    Language:English   Publishing type:Research paper (scientific journal)  

    Keloids are chronic fibroproliferative skin disorders with high recurrence rates and limited treatment options, yet reliable diagnostic biomarkers are lacking. Current classification systems rely heavily on clinical observation, underscoring the need for objective, noninvasive tools. In this exploratory study, serum-based 1H nuclear magnetic resonance (NMR) measurement combined with short-time Fourier transform (STFT) for time-frequency analysis was performed, followed by principal component analysis (PCA), to investigate potential patient subgroups. Serum samples from 29 patients were analysed and PC1 scores suggested two potential patient subgroups. Retrospective analysis showed that these subgroups differed primarily in keloid aetiology: one group predominantly included cases arising from unclear or minimal causes (e.g., acne, folliculitis), whereas the other comprised cases following clear traumatic events (e.g., surgery). Although most clinical variables showed no significant differences, significant differences in aetiology and Japan Scar Workshop Scar Scale (JSS) scores support the biological relevance of this separation of subgroups. These findings suggest that the time-frequency features of NMR signals from serum samples capture systemic characteristics associated with keloid pathophysiology. If validated in larger cohorts, this approach may serve as a noninvasive adjunct to clinical assessment and lay the foundation for objective patient stratification and precision-guided treatment strategies.

    DOI: 10.1111/iwj.70865

    PubMed

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Research Projects

  • 最新の核磁気共鳴(NMR)分析技術を用いた革新的な溺水吸引診断法への応用の試み

    Grant number:24K22213  2024.6 - 2027.3

    日本学術振興会  科学研究費助成事業  挑戦的研究(萌芽)

    崔 范来, 平川 慶子, 市川 実咲, 金涌 佳雅, 由井 奏子, 沖原 香

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    Grant amount:\6370000 ( Direct Cost: \4900000 、 Indirect Cost:\1470000 )

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  • 複数のNMR分析技術による死後髄液からの同時複合的な法医診断法の開発

    Grant number:24K13556  2024.4 - 2027.3

    日本学術振興会  科学研究費助成事業  基盤研究(C)

    金涌 佳雅, 平川 慶子, 市川 実咲, 崔 范来, 沖原 香, 由井 奏子

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    Grant amount:\4550000 ( Direct Cost: \3500000 、 Indirect Cost:\1050000 )

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  • Development of a method for determining the cause of death from postmortem body fluid samples using NMR modal analysis

    Grant number:21K19676  2021.7 - 2025.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Challenging Research (Exploratory)

    Ichikawa Misaki

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    Grant amount:\6370000 ( Direct Cost: \4900000 、 Indirect Cost:\1470000 )

    Postmortem cerebrospinal fluid collected during a forensic autopsy was subjected to nuclear magnetic resonance (NMR) measurement, followed by time-frequency analysis. The resulting spectrogram data were analysed using PLS-DA to verify the ability to identify or detect the presence of cranial trauma, pathological conditions, and postmortem interval. The results indicated the possibility of detecting the presence of cranial trauma and other factors derived from postmortem cerebrospinal fluid.Nevertheless, the spectrogram data obtained from this experiment was deemed to contain various biomedical information present in postmortem cerebrospinal fluid. It was therefore recognised that further research was necessary to develop a testing method that could be immediately utilised in forensic practice, given that the data may be influenced by drugs or other factors.

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  • Research on the application of qNMR method to forensic toxicological analysis

    Grant number:21K10534  2021.4 - 2025.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (C)

    Kanawaku Yoshimasa

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    Grant amount:\4290000 ( Direct Cost: \3300000 、 Indirect Cost:\990000 )

    A series of experiments were conducted using the qNMR method to ascertain the concentration of ascorbic acid solution. Ascorbic acid is a human endogenous substance and one of the components detected in blood. A comparative analysis was performed using high-performance liquid chromatography (HPLC) on the same sample. Following the optimisation of the measurement conditions for the qNMR method, it was determined that the NMR spectra of the ascorbic acid solution samples were obtained without incident under the prevailing measurement conditions.No impurity peaks that could potentially interfere with quantitative calculations were identified in the spectra. The correlation between the ascorbic acid concentrations quantified by qNMR and HPLC methods was found to be extremely good. In serum samples characterised by elevated levels of mixed components, it was determined that the successful extraction of peaks necessitates the application of expertise.

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