Chem. J. Chinese Universities ›› 2025, Vol. 46 ›› Issue (1): 20240135.doi: 10.7503/cjcu20240135

• Article • Previous Articles     Next Articles

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)

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

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