高等学校化学学报 ›› 2025, Vol. 46 ›› Issue (1): 20240135.doi: 10.7503/cjcu20240135

• 研究论文 • 上一篇    下一篇

海藻酸钠稳定金纳米簇的肾脏清除

王天缘1, 张华真2, 赵聘1, 王凯1, 林敏1()   

  1. 1.青岛大学材料科学与工程学院, 青岛 266071
    2.芜湖市产业创新中心, 芜湖 241000
  • 收稿日期:2024-03-25 出版日期:2025-01-10 发布日期:2024-04-10
  • 通讯作者: 林敏 E-mail:linmin0401@qdu.edu.cn
  • 基金资助:
    山东省自然科学基金(ZR2019BEM044);山东省泰山学者项目(tsqn201812050)

Renal Clearance of Sodium Alginate Stabilized Au Nanoclusters

WANG Tianyuan1, ZHANG Huazhen2, ZHAO Pin1, WANG Kai1, LIN Min1()   

  1. 1.College of Materials Science and Engineering,Qingdao University,Qingdao 266071,China
    2.Wuhu Industrial Innovation Center,Wuhu 241000,China
  • Received:2024-03-25 Online:2025-01-10 Published:2024-04-10
  • Contact: LIN Min E-mail:linmin0401@qdu.edu.cn
  • Supported by:
    the Natural Science Foundation of Shandong Province, China(ZR2019BEM044);the Taishan Scholar Program of Shandong Province, China(tsqn201812050)

摘要:

使用生物相容性良好的海藻酸钠作为金纳米簇的配体, 制备了细胞毒性极低的海藻酸钠稳定的金纳米簇, 其尺寸为(4.2±0.9) nm. 海藻酸钠配体通过延缓金纳米簇的肾脏代谢过程, 将金纳米簇的血液循环半衰期延长至(8.2±0.2) h, 并将肿瘤的摄取效率提高到10.4%ID/g; 当肿瘤区域存在高浓度的钙离子时, 其与海藻酸钠的交联可将肿瘤摄取效率进一步提高到14.5%ID/g. 通过对小鼠排泄物的监测, 证明了金纳米簇主要通过肾脏过滤, 经过尿液排出体外, 代谢过程仅对肾功能产生可恢复的微小干扰, 表明海藻酸钠稳定的金纳米簇具备良好的生物安全性. 本文通过对配体功能性的探索, 解决了纳米簇在生物安全性与肿瘤治疗效率之间的矛盾, 也为其它高性能纳米诊疗试剂的功能设计提供了理论依据.

关键词: 纳米簇, 肾脏清除, 生物安全性, 肿瘤摄取, 电子计算机断层扫描成像

Abstract:

Biocompatible and biodegradable sodium alginate(SA) was used to stabilize Au nanoclusters(NCs) in this paper. Combined with the chemical inertness of Au, SA-AuNCs of (4.2±0.9) nm in diameter exhibited extremely low cytotoxicity. After administrated into mice, SA could delay the renal clearance of SA-AuNCs and prolong the half-life to (8.2±0.2) h in blood circulation. Thus the tumor uptake rate was increased to 10.4%ID/g. When tumor area contained high concentration of calcium ions, the tumor uptake rate could be further improved to 14.5%ID/g due to cross-link between Ca2+ and SA. The SA-AuNCs were mainly excreted through renal clearance, which only involved minor, but recoverable interference to the renal function. This indicates good biosafety of SA-AuNCs. This work can solves the contradiction between the renal clearance and tumor uptake of nanoclusters by using functional of ligands, which provides theoretical guidance for other high-performance diagnostic and therapeutic nanomaterials.

Key words: Nanoclusters, Renal clearance, Biosafety, Tumor uptake, Computed tomography imaging

中图分类号: 

TrendMD: