五十嵐 裕貴 (イガラシ ユウキ)

IGARASHI Yuki

写真a

所属(所属キャンパス)

薬学部 薬学科 薬効解析学講座 (芝共立)

職名

助教

メールアドレス

メールアドレス

総合紹介 【 表示 / 非表示

  •  

経歴 【 表示 / 非表示

  • 2023年04月
    -
    2025年03月

    医療法人社団 緑成会横浜総合病院, 薬剤部, 薬剤師

  • 2025年04月
    -
    継続中

    慶應義塾大学 薬学部, 薬効解析学講座, 助教

学歴 【 表示 / 非表示

  • 2012年04月
    -
    2019年03月

    慶應義塾大学, 薬学部, 薬学科

    大学, 卒業

  • 2019年04月
    -
    2023年03月

    慶應義塾大学大学院

    大学院, 卒業, 博士

学位 【 表示 / 非表示

  • 博士(薬学), 慶應義塾大学大学院, 課程, 2023年03月

免許・資格 【 表示 / 非表示

  • 薬剤師免許, 2019年05月

 

論文 【 表示 / 非表示

  • Development and external validation of a population pharmacokinetic model and optimal Vancomycin dosing regimen for overweight and obese patients

    Komatsu T., Tomizawa A., Samura M., Suzuki A., Ishigo T., Fujii S., Ibe Y., Yoshida H., Tanaka H., Fujihara H., Yamaguchi F., Ebihara F., Maruyama T., Yagi Y., Hamada Y., Nagumo F., Takuma A., Chiba H., Nishi Y., Igarashi Y., Enoki Y., Otori K., Matsumoto K.

    Journal of Infection and Chemotherapy 31 ( 12 )  2025年12月

    ISSN  1341321X

     概要を見る

    Introduction: This study aimed to develop and evaluate a population pharmacokinetic model and optimal dosing regimen for vancomycin in overweight and obese adults. Methods: A population pharmacokinetic model using a two-compartment system was constructed using a nonlinear mixed-effects approach, incorporating 527 data points from 184 participants. External validation of the model was carried out using an additional 55 data points from 21 participants; these were not used in the construction of the model. Monte Carlo simulations were used to determine the dosage that achieved the steady state area under the curve value falling between 400 μg h/mL and 600 μg h/mL. Results: In the final model, vancomycin clearance was found to be a significant predictor of blood vancomycin levels, alongside creatinine clearance (CCr), blood urea nitrogen levels, and incidence of heart failure. CCr was calculated with adjusted body weight (AdjBW). AdjBW was selected as a predictor of the volume of distribution in the central and peripheral compartments. External validation showed that the highest proportion of cases had deviations of less than 15 % between measured and predicted values in the final model developed in this study. This indicates that our model outperforms previously developed models (five for obese patients and four for non-obese patients). Conclusions: Our model shows that determining effective vancomycin doses for overweight and obese patients depend on estimated CCr rates, AdjBW, BUN levels, and incidence of heart failure.

  • Evaluating the necessity of two-point sampling for vancomycin area under the curve in follow-up therapeutic drug monitoring

    Suzuki A., Fujihara H., Yamaguchi F., Yoshida H., Tanaka H., Yagi Y., Maruyama T., Hamada Y., Ishigo T., Fujii S., Nagumo F., Samura M., Chiba H., Ebihara F., Takuma A., Komatsu T., Tomizawa A., Nishi Y., Igarashi Y., Enoki Y., Matsumoto K.

    Journal of Infection and Chemotherapy 31 ( 11 )  2025年11月

    ISSN  1341321X

     概要を見る

    Objective: While both peak and trough (two-point) sampling are recommended to estimate the area under the concentration-time curve (AUC) for vancomycin, one-point sampling may reduce clinical burden. This study aimed to identify patient populations requiring two-point sampling by examining risk factors associated with AUC discrepancies between one- and two-point sampling during follow-up therapeutic drug monitoring (TDM). Method: This multicenter retrospective observational study included adult patients who received vancomycin from September 2020 to December 2023 and underwent two-point sampling at both initial and follow-up TDM. AUC was estimated using the Practical Antimicrobial TDM (PAT) version 4.0, and creatinine clearance (CLcr) was calculated using the Cockcroft-Gault equation. One- and two-point follow-up AUCs were compared using previously entered two-point concentrations from initial TDM. Patients were divided into a discrepancy group (AUC difference ≥10 %) and a non-discrepancy group. Risk factors were identified by univariate and multivariate analysis. Results: AUC values from one- and two-point sampling in 256 cases were highly correlated (r<sup>2</sup> = 0.965, p < 0.001). Seventeen cases (6.6 %) showed discrepancies ≥10 %. Multivariate analysis identified BMI ≥25 kg/m<sup>2</sup> (OR = 6.946, p = 0.001), CLcr <50 mL/min (OR = 5.863, p = 0.002), and ΔCLcr ≥10 mL/min (OR = 4.444, p = 0.012) as significant risk factors. Conclusion: Although one- and two-point AUCs showed strong correlation, discrepancies ≥10 % were more likely in patients with elevated BMI or impaired/unstable renal function. This suggests that two-point sampling may be essential for these patients to ensure accurate dosing of vancomycin during follow-up TDM.

  • Efficacy and safety of isavuconazole for invasive fungal infections: A systematic review and meta-analysis of randomized controlled trials

    Kawasaki A., Shintani R., Takao R., Nakazawa Y., Mihara T., Ikegami S., Shimada S., Matsumoto Y., Okamoto Y., Igarashi Y., Enoki Y., Taguchi K., Matsumoto K.

    Medical Mycology (Oxford University Press)  63 ( 10 )  2025年09月

    研究論文(学術雑誌), 共著, 責任著者, 査読有り,  ISSN  13693786

     概要を見る

    Background Isavuconazole (ISA) is a treatment option for invasive fungal infections (IFIs) and is known for a favorable safety profile compared with other antifungal agents. However, comprehensive evidence regarding its efficacy and safety remains limited. Objectives This study aimed to assess the efficacy and safety of ISA compared with other antifungal agents through a systematic review and meta-analysis restricted to randomized controlled trials (RCTs), to provide more reliable estimates of its clinical effects. Methods Following Preferred Reporting Items for Systematic reviews and Meta-Analysis (PRISMA) guidelines, a comprehensive literature search was conducted using PubMed, the Cochrane Library, Web of Science, and ClinicalTrials.gov to identify RCTs comparing ISA with other antifungal agents. The primary outcomes were clinical response and mortality. Secondary outcomes included the incidence of adverse events, including serious, drug-related, and organ-specific toxicities. A subgroup analysis was conducted focusing on filamentous fungal infections, comparing ISA and voriconazole. Results Three RCTs met the inclusion criteria. No statistically significant differences were observed between ISA and comparator agents in terms of clinical response, mortality, or total and organ-specific adverse events. A trend toward fewer adverse events was noted in the ISA group. In the subgroup analysis, ISA and voriconazole showed similar efficacy and overall safety; however, the incidence of both drug-related adverse events and hepatobiliary disorders was significantly lower in the ISA group. Conclusions ISA demonstrated efficacy comparable to that of other antifungal agents, with a favorable safety profile in patients with IFIs, including filamentous fungal infections. This meta-analysis of RCTs provides high-quality evidence to support antifungal drug selection in clinical practice.

  • Oral β-lactam combinations are effective in vitro against Mycobacterium avium, regardless of clarithromycin susceptibility

    Maiko Yoshikawa, Tomoyasu Nishimura, Kana Misawa, Rina Shimamura, Kenta Suzuki, Shoko Kashimura, Yuki Igarashi, Yuki Enoki , Kazuaki Taguchi, Naoki Hasegawa, Ho Namkoong, Kazuaki Matsumoto

    Microbiology Spectrum    e0201225 2025年09月

    研究論文(学術雑誌), 共著, 査読有り

  • External validation of a flowchart related to achieving the target area under the concentration-time curve for vancomycin: A retrospective multicenter study

    Ishigo T., Suzuki A., Ibe Y., Fujii S., Fukudo M., Yoshida H., Tanaka H., Fujihara H., Yamaguchi F., Ebihara F., Maruyama T., Yagi Y., Hamada Y., Samura M., Nagumo F., Komatsu T., Tomizawa A., Takuma A., Chiba H., Nishi Y., Igarashi Y., Enoki Y., Matsumoto K.

    Journal of Infection and Chemotherapy 31 ( 5 )  2025年05月

    査読有り,  ISSN  1341321X

     概要を見る

    During therapeutic drug monitoring (TDM) for vancomycin (VCM), the area under the concentration-time curve (AUC) is important for balancing efficacy versus toxicity. In a previous study, we developed a decision tree (DT) model to achieve the target AUC during TDM over the follow-up period (AUCfollow-up). This study aimed to validate the DT model for achieving the target AUCfollow-up. Patients who received VCM for at least 72 h and had an initial TDM within four doses between January 2023 and December 2023 were analyzed. The AUC of the initial TDM was calculated over 2-point (peak/trough) concentrations via Bayesian estimation. The target AUCfollow-up was defined as 400–600 μg h/mL. Among 188 patients (median age [interquartile range], 66 [56, 79] years; 50 % female), the target AUCfollow-up was achieved in 70 % (132/188). When the predicted AUC was 400–600 μg h/mL, 84 % (102/121) achieved the target AUCfollow-up. In a 12 h dosing interval subgroup, 86 % (88/102) achieved the target AUCfollow-up. Conversely, when the predicted AUC was <400 or >600 μg h/mL, the proportion who achieved the target AUCfollow-up dropped to 44 % (30/67). Only 30 % (3/10) of those with creatinine clearance rates of >130 mL/min/1.73 m2 achieved the target. The area under the receiver operating characteristics curve was 0.74, and the R2 value was 0.15. Our findings confirmed the external validity of the DT model and supported its use for optimizing VCM dosing. Overall, the DT model offers a reliable framework for achieving target AUC values during follow-up for TDM, aiding safe and effective treatment.

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研究発表 【 表示 / 非表示

  • 炎症性腸疾患・Clostridioides difficile感染症マウスモデルを用いたfidaxomicinの有用性評価

    三原 貴之, 五十嵐 裕貴, 榎木 裕紀, 田口 和明, 松元 一明

    第72回日本化学療法学会東日本支部総会 第74回日本感染症学会東日本地方会学術集会 合同学会 , 

    2025年09月

    口頭発表(一般)

  • 造血器腫瘍患者におけるバンコマイシン薬物動態モデル別の予測性の検討

    坂本靖宜, 重村明香, 井出和男, 渡邉直優, 鈴木智代, 五十嵐裕貴, 榎木裕紀, 加藤英明, 松元一明

    第72回日本化学療法学会東日本支部総会 第74回日本感染症学会東日本地方会学術集会 合同学会 , 

    2025年09月

    口頭発表(一般)

  • 2点採血でバンコマイシンのAUCを算出した症例におけるAKIリスクの層別化

    石郷友之, 鈴木絢子, 藤居賢, 伊部裕太, 吉田博昭, 田中宏明, 海老原文哉, 丸山拓実, 八木祐助, 佐村優, 南雲史雄, 小松敏彰, 冨澤淳, 詫間章俊, 千葉博暁, 五十嵐裕貴, 榎木裕紀, 浜田幸宏, 西圭史, 松元一明

    第72回日本化学療法学会東日本支部総会 第74回日本感染症学会東日本地方会学術集会 合同学会 , 

    2025年09月

    口頭発表(一般)

  • Mycobacterium avium complexに対するβラクタム系抗菌薬2剤併用のin vitroにおける有効性評価

    吉川万衣子, 西村知泰, 三澤可奈, 島村莉奈, 鈴木健太, 五十嵐裕貴, 榎木裕紀, 長谷川直樹, 南宮湖, 松元一明

    第72回日本化学療法学会東日本支部総会 第74回日本感染症学会東日本地方会学術集会 合同学会 , 

    2025年09月

    口頭発表(一般)

  • Hollow Fiber Infection Modelを用いた肺MAC症に対する標準治療の有効性評価

    鈴木健太, 島村莉奈, 吉川万衣子, 宇山杏奈, 林侑孝, 五十嵐裕貴, 榎木裕紀, 西村知泰, 松元一明

    第72回日本化学療法学会東日本支部総会 第74回日本感染症学会東日本地方会学術集会 合同学会, 

    2025年09月

    口頭発表(一般)

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競争的研究費の研究課題 【 表示 / 非表示

  • 瞬間的MICとHFIMを用いた感染部位指向型PK/PD評価手法の構築

    2025年04月
    -
    2027年03月

    文部科学省・日本学術振興会, 科学研究費助成事業, 研究活動スタート支援, 補助金,  研究代表者

  • MA-T技術を活用した新規消毒剤の開発研究

    2025年
    -
    2026年03月

    一般用医薬品セルフメディケーション振興財団, 調査・研究助成, 補助金,  研究代表者

受賞 【 表示 / 非表示

  • 第8回フレッシャーズ・カンファランス優秀演題発表賞

    島村莉奈,西村知泰,吉川万衣子,三澤可奈,矢野大和,榎木裕紀,五十嵐裕貴,長谷川直樹,南宮湖,松元一明, 2025年06月, 抗菌薬投与が引き起こすMycobacterium abscessusの細胞壁脂質とコロニー形態変化

    受賞区分: 国内学会・会議・シンポジウム等の賞

  • 日本化学療法学会Young Challenger Award(YCA)2025

    五十嵐裕貴, 2025年05月, 日本化学療法学会, β-ラクタム薬/β-ラクタマーゼ阻害薬の併用療法におけるin vivo pharmacokinetics/pharmacodynamics評価方法の構築

    受賞区分: 国内学会・会議・シンポジウム等の賞

  • 第34回日本医療薬学会年会Postdoctoral award

    五十嵐裕貴, 2024年11月, 日本医療薬学会, β-ラクタム薬/β-ラクタマーゼ阻害薬の併用療法におけるin vivo pharmacokinetics/pharmacodynamics評価方法の構築

    受賞区分: 国内学会・会議・シンポジウム等の賞

  • 2023年度KP会星野尚美記念薬学研究・活動奨励賞 研究論文部門

    五十嵐裕貴, 2024年, Development of an optimized and practical pharmacokinetics/pharmacodynamics analysis method for aztreonam/nacubactam against carbapenemase-producing K. pneumoniae

    受賞区分: その他

  • Sato Pharmaceutical Research Encouragement Award

    五十嵐裕貴, 2020年, 佐藤製薬株式会社, PK/PD理論に基づくCefditorenの適正使用を目指したマウスにおける薬物動態研究

    受賞区分: その他

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担当授業科目 【 表示 / 非表示

  • 演習(薬効解析学)

    2025年度

  • 卒業研究1(薬学科)

    2025年度

  • 実務実習事前学習(実習)

    2025年度

  • 英語演習(薬学科)

    2025年度

  • 英語演習(薬科学科)

    2025年度

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所属学協会 【 表示 / 非表示

  • 日本臨床薬理学会, 

    2025年01月
    -
    継続中
  • 日本医療薬学会, 

    2021年02月
    -
    継続中
  • 日本化学療法学会, 

    2019年11月
    -
    継続中