Oxonic acid potassium saltはウリカーゼの活性を選択的で競合的に阻害し、体内で尿酸のレベルを効果的に上げる。Oxonic acid potassium saltは、5-フルオロウリジン-5'-一リン酸への5-フルオロウラシル(5-FU)のリン酸化を阻害する[1-2]。Oxonic acid potassium saltは、高尿酸血症の動物モデルの作成に使われ、癌の研究で補助ツールとして機能できる[3-4]。
体内で、Oxonic acid potassium salt(350mg/kg/日)とHypoxanthine(450mg/kg/日)の併用をKunmingマウスに8週間連続で、腹腔内注射し、経口投与した結果、慢性高尿酸血症モデルを誘発し、Oxonic acid potassium saltは左心室前壁肥厚、心筋構造の乱れ、心臓重量の増加を著しく起こし、同時に腎臓の肥大や尿細管拡張などの合併症を起こした[5]。Oxonic acid potassium salt(350mg/kg/日)とHypoxanthine(450mg/kg/日)の併用をKunmingマウスに1週間連続で、腹腔内注射し、経口投与した結果、高尿酸血症モデルを誘発し、Oxonic acid potassium saltは、心筋細胞でポリアミノ酸のレベルを著しく減らし、肝心なポリアミノ酸合成酵素ODC1と代謝酵素SAT1のタンパク質の発見を上方制御し、心筋細胞の損傷に導いた[6]。
References:
[1] Zhang N, Zhang B, Chen X, et al. Effects and mechanisms of Polygonati Rhizoma polysaccharide on potassium oxonate and hypoxanthine-induced hyperuricemia in mice. Int J Biol Macromol. 2024 Sep 13;280(Pt 1):135550.
[2] Yamashita T, Ueda Y, Fuji N, et al. Potassium oxonate, an enzyme inhibitor compounded in S-1, reduces the suppression of antitumor immunity induced by 5-fluorouracil. Cancer Chemother Pharmacol. 2006 Aug;58(2):183-8.
[3] Tian J, Wang B, Xie B, et al. Pyroptosis inhibition alleviates potassium oxonate- and monosodium urate-induced gouty arthritis in mice. Mod Rheumatol. 2022 Jan 5;32(1):221-230.
[4] Yoshisue K, Hironaga K, Yamaguchi S, et al. Reduction of 5-fluorouracil (5-FU) gastrointestinal (GI) toxicity resulting from the protection of thymidylate synthase (TS) in GI tissue by repeated simultaneous administration of potassium oxonate (Oxo) in rats. Cancer Chemother Pharmacol. 2000;46(1):51-6.
[5] Lin C, Zheng Q, Li Y, et al. Assessment of the influence on left ventricle by potassium oxonate and hypoxanthine-induced chronic hyperuricemia. Exp Biol Med (Maywood). 2023 Jan;248(2):165-174.
[6] Lin C, Zheng Q, Yu H, et al. Uric acid-induced cardiomyocytic polyamines' insufficience: a potential mechanism mediates cardiomyocytic injury. Front Endocrinol (Lausanne). 2025 Apr 7;16:1504614.
















