X-ray Visible and Uniform Alginate Microspheres Loaded with in Situ Synthesized BaSO4 Nanoparticles for in Vivo Transcatheter Arterial Embolization

Qin Wang, Kun Qian, Shanshan Liu, Yajiang Yang, Bin Liang, Chuansheng Zheng, Xiangliang Yang, Huibi Xu, Amy Q. Shen

Research output: Contribution to journalArticle

30 Scopus citations


The lack of noninvasive tracking and mapping the fate of embolic agents has restricted the development and further applications of the transcatheter arterial embolization (TAE) therapy. In this work, inherent radiopaque embolic material, barium alginate (ALG) microspheres loaded with in situ synthesized BaSO4 (denoted as BaSO4/ALG microspheres), have been synthesized by a one-step droplet microfluidic technique. One of the advantages of our microfluidic approach is that radiopaque BaSO4 is in the form of nanoparticles and well dispersed inside ALG microspheres, thereby greatly enhancing the imaging quality. The crystal structure of in situ synthesized BaSO4 nanoparticles in ALG microspheres is confirmed by X-ray diffraction analysis. Results of in vitro and in vivo assays from digital subtraction angiography and computed tomography scans demonstrate that BaSO4/ALG microspheres possess excellent visibility under X-ray. Histopathological analysis verifies that the embolic efficacy of BaSO4/ALG microspheres is similar to that of commercially available alginate microsphere embolic agents. Furthermore, the visibility of radiopaque BaSO4/ALG microspheres under X-ray promises the direct detection of the embolic efficiency and position of embolic microspheres after embolism, which offers great promises in direct real-time in vivo investigations for TAE. (Figure Presented).

Original languageEnglish (US)
Pages (from-to)1240-1246
Number of pages7
Issue number4
StatePublished - Apr 13 2015

ASJC Scopus subject areas

  • Bioengineering
  • Biomaterials
  • Polymers and Plastics
  • Materials Chemistry

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