腫瘍に対するセリウムの原子化による酵素のような活動の促進
Mengdie Jin1, Zhong Liang1, Yongkang Huang1
1Tianjin Key Lab for Rare Earth Materials and Applications, Center for Rare Earth and Inorganic Functional Materials, School of Materials Science and Engineering & National Institute for Advanced Materials, Nankai University, Tianjin 300350, P. R. China.
Journal of the American Chemical Society
|December 2, 2024
まとめ
新型セリウム単原子ナノ酵素 (Ce SAs@NC) は,腫瘍特異性と触媒活性が強化されていることを示しています. このナノ酵素は 反応性酸素種を生成し 免疫微環境を調節することで 腫瘍と闘い 癌治療の有望な可能性を秘めています
科学分野:
- 生物医学工学
- 材料科学
- ナノテクノロジー
背景:
- ナノ酵素の触媒効果は,酵素の活性と特異性が限られている.
- 腫瘍を標的とし 多面的な治療機能を持つナノ酵素の開発は 効果的ながん治療に不可欠です
研究 の 目的:
- 窒素ドーピングされた炭素 (Ce SAs@NC) に支えられた新しいセリウム単原子ナノ酵素を合成し,特徴づけること.
- Ce SAs@NCの強化された酵素のような活動,腫瘍特異性,および治療の可能性をin vitroおよびin vivoで評価する.
主な方法:
- シリウム単原子ナノ酵素 (Ce SAs@NC) を含んだ窒素添加炭素の合成
- セリウム酸化ナノ粒子と比較して,過酸化酵素のような活動とカタラーゼのような活動の評価.
- 反応性酸素種生成,低酸素緩和,免疫細胞調節を含む腫瘍微環境に対するCe SAs@NCの効果の調査.
- 光熱効果と in vitro/in vivo 抗腫瘍効果の評価
主要な成果:
- Ce SAs@NCは,CeO2ナノ粒子と比較して,ペロキシダゼのような,そしてカタラゼのような優れた活性を示した.
- ナノ酵素は効果的に過酸化水素を細胞毒性ヒドロキシルと超酸化基に変換し,腫瘍低酸素症を緩和しました.
- Ce SAs@ NCは,M1マクロファージを刺激し,腫瘍増殖を抑制する,腫瘍特有の免疫調節を示した.
- 単一原子の大きさ,光熱の影響,酵素活性,免疫調節の組み合わせにより,副作用が軽減されたインビトロおよびインビボにおける有意な抗腫瘍効果が得られました.
結論:
- Ce SAs@ NCは,腫瘍特異性と強力なマルチ酵素のような活動を持つ非常に効果的なナノ酵素プラットフォームを提示しています.
- ナノ酵素が反応性酸素種を生成し 低酸素を軽減し 免疫微環境を調節する能力は 癌治療の有望な戦略です
- 開発されたCe SAs@NCは,毒性が低下し,先進的なナノ酵素ベースのがん治療への道を切り開いている.
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