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Janus particle-engineered structural lipiodol droplets for arterial embolization.

Sijian Tao1,2, Bingquan Lin3, Houwang Zhou1

  • 1Cancer Research Institute, School of Basic Medical Sciences, Southern Medical University, 510515, Guangzhou, P. R. China.

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Janus particle-engineered lipiodol droplets offer superior embolization, effectively blocking renal arteries and finer vessels in rabbits without recanalization. This novel embolic material demonstrates enhanced stability and clinical potential.

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Area of Science:

  • Biomaterials Engineering
  • Interventional Radiology
  • Nanotechnology

Background:

  • Embolization is a key treatment strategy, but current embolic materials lack sufficient effectiveness.
  • Challenges remain in achieving highly efficient and durable vessel occlusion.
  • Existing materials often struggle with precise delivery and long-term stability.

Purpose of the Study:

  • To develop novel embolic materials with improved embolization efficiency and stability.
  • To engineer structural lipiodol droplets using Janus particles for enhanced performance.
  • To evaluate the efficacy of these engineered droplets in a preclinical renal embolization model.

Main Methods:

  • Janus particles were used to engineer structural lipiodol droplets via self-assembly at the oil-water interface.
  • The mechanical stability and viscoelastic properties of the engineered droplets were characterized.
  • Renal embolization was performed in rabbits to assess efficacy, delivery, and long-term outcomes.

Main Results:

  • The Janus particle-engineered droplets demonstrated excellent mechanical stability and viscoelasticity, allowing close packing for efficient arterial embolization.
  • These droplets exhibited capacity for distal travel, successfully embolizing vessels as small as 40 μm.
  • Post-embolization evaluation at 14 days showed no recanalization or non-target embolization, with superior effectiveness compared to clinical lipiodol emulsions.

Conclusions:

  • Janus particle-engineered structural lipiodol droplets represent a significant advancement in embolic material design.
  • This approach enables highly efficient renal embolization with improved stability and targeting.
  • The strategy offers a promising alternative for fabricating advanced embolic agents with strong clinical application potential.