作成日: 2026-02-07
日本語版(HP向け)
どんなテーマ?
γ-シクロデキストリン(γCD)は、分子を“包み込む空洞”をもつ糖由来分子です。
この空洞に機能分子を入れる(包接する)ことで、溶けやすさ・反応性・分子認識を調整できます。
ここでは、(1) 抗酸化(酵素活性制御)と (2) キラル分離(分析)という、性質の異なる2分野の研究を紹介します。
1. γ-Cyclodextrin/Genistein Inclusion Complex Catalyzes GPx4-Mediated Reduction of Organic/Inorganic Peroxides: Based on SERS and In Silico Research
- 掲載誌: FOODS(JIF 2024: 5.1)
- 年: 2026
- 著者: Zhang, MM; Ren, WS; Liu, JB; Gao, Y; Xu, ML; Zhang, T
- DOI: 10.3390/foods15020297
やさしい解説(Abstractの要点を整理:本文の転載なし)
– 有機・無機の過酸化物は細胞の酸化還元バランスを乱すため、還元酵素(GPx4)による分解機構を詳しく知ることが重要です。
– 本研究は、抗酸化性が知られるゲニステイン(GEN)を γ-シクロデキストリン(γCD) に包接させ、GENの“凝集”をほどいて水中で扱いやすい複合体(γCD/GEN)を作製(包接効率>40%)。
– SERS(表面増強ラマン)で反応を追跡し、クメンヒドロペルオキシド(CHP)と過酸化水素(H₂O₂)で、還元の支配因子が異なることを示した(CHPはGPx4濃度依存が大きい等)。
– 同位体効果の検討から、CHPはラジカル開始反応の寄与が大きく、H2O2はプロトン移動が関与するなど、反応機構の違いを整理。
– 分子ドッキング/MD計算で、γCD/GENがGPx4活性中心近傍(Sec(Cys)-46部位)に安定結合し、触媒活性を高め得ることを支持した。
2. Development of an electrokinetic chromatography method for the rapid enantiomeric determination of 5-hydroxytryptophan. Application to the analysis of dietary supplements
- 掲載誌: ANALYST(JIF 2024: 3.3)
- 年: 2026
- 著者: Adámez-Rodríguez, S; Marina, ML; Castro-Puyana, M
- DOI: 10.1039/d5an01100k
やさしい解説(Abstractの要点を整理:本文の転載なし)
– 5-ヒドロキシトリプトファン(5‑HTP)はセロトニン前駆体で、サプリに用いられますが、有効なのはL体で、D体混入は品質管理上の問題になります。
– 本研究は、硫酸化γ-シクロデキストリン(sulfated‑γCD) をキラル分離剤として使う電気泳動(エレクトロキネティッククロマトグラフィー)法を開発。
– 短い有効長(8.5 cm)と短端注入を組み合わせ、5‑HTPのD/L分離を3分未満で達成(分離度≈4.6)。
– 直線性・精度・正確さ・定量下限(LOQ)を評価し、サプリの品質管理に適用できる性能を示した。
– γCDの“包接とキラル認識”を分析化学に活かした実用的な高速法として位置づけられる。
English version (for website)
What is this topic about?
γ‑Cyclodextrin (γCD) is a sugar‑derived host molecule with a cavity that can encapsulate guest compounds.
This inclusion can tune solubility, reactivity, and molecular recognition, enabling applications from bio‑redox chemistry to analytical separations.
Below are the papers from the attached file (up to top 3 by 2024 JIF).
Papers (sorted by 2024 JIF; up to top 3)
1. γ-Cyclodextrin/Genistein Inclusion Complex Catalyzes GPx4-Mediated Reduction of Organic/Inorganic Peroxides: Based on SERS and In Silico Research
- Journal: FOODS (2024 JIF: 5.1)
- Year: 2026
- Authors: Zhang, MM; Ren, WS; Liu, JB; Gao, Y; Xu, ML; Zhang, T
- DOI: 10.3390/foods15020297
Plain-language bullets (paraphrased from the abstract; no verbatim text)
– Organic/inorganic peroxides can disrupt cellular redox homeostasis, so understanding GPx4‑mediated reduction mechanisms is important.
– The study forms a γ‑cyclodextrin (γCD) / genistein (GEN) inclusion complex that reduces GEN aggregation and improves aqueous handling (encapsulation efficiency >40%).
– Using SERS, it shows different catalytic behaviors for cumene hydroperoxide (CHP) vs hydrogen peroxide (H2O2); e.g., CHP reduction depends strongly on both γCD/GEN and GPx4 concentrations.
– Isotope‑effect analysis suggests CHP reduction involves stronger radical‑initiated pathways, while H2O2 reduction involves proton transfer—linking rate differences to redox mechanisms.
– Docking and molecular dynamics indicate stable binding near GPx4’s active center (Sec/Cys‑46 region), supporting enhanced catalytic activity.
2. Development of an electrokinetic chromatography method for the rapid enantiomeric determination of 5-hydroxytryptophan. Application to the analysis of dietary supplements
- Journal: ANALYST (2024 JIF: 3.3)
- Year: 2026
- Authors: Adámez-Rodríguez, S; Marina, ML; Castro-Puyana, M
- DOI: 10.1039/d5an01100k
Plain-language bullets (paraphrased from the abstract; no verbatim text)
– 5‑Hydroxytryptophan (5‑HTP) is a serotonin precursor used in dietary supplements; quality control requires ensuring the active L‑form and excluding the D‑enantiomer.
– This work develops rapid electrokinetic chromatography using sulfated‑γ‑cyclodextrin as the chiral selector.
– By combining short‑end injection with a short effective capillary length (8.5 cm), it achieves D/L separation in <3 minutes (resolution ~4.6).
– Analytical performance (linearity, precision, accuracy, LOQs) supports practical application to supplement quality control.
– Demonstrates how γCD‑based chiral recognition enables fast, reliable enantiomer analysis.
参考文献 / References
- Zhang, MM; Ren, WS; Liu, JB; Gao, Y; Xu, ML; Zhang, T (2026). γ-Cyclodextrin/Genistein Inclusion Complex Catalyzes GPx4-Mediated Reduction of Organic/Inorganic Peroxides: Based on SERS and In Silico Research. FOODS 15(2) 297. doi:10.3390/foods15020297
- Adámez-Rodríguez, S; Marina, ML; Castro-Puyana, M (2026). Development of an electrokinetic chromatography method for the rapid enantiomeric determination of 5-hydroxytryptophan. Application to the analysis of dietary supplements. ANALYST PMID 372652. doi:10.1039/d5an01100k



