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Sono-responsive smart nanoliposomes for precise and rapid hemostasis application.

Qian Zhang1, Lichao Zhu2, Kaiyang Wang2

  • 1Department of Emergency and Critical Care Medicine, Shanghai Pudong New Area People's Hospital No. 490 South Chuanhuan Road Shanghai 201299 P. R. China wanjian@shpdph.com.

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Summary

Researchers developed smart nanoliposomes loaded with thrombin (TNL) for rapid hemostasis. Ultrasound triggers TNL to release thrombin, significantly reducing bleeding and demonstrating excellent biosafety for emergency medicine.

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Area of Science:

  • Biomaterials Science
  • Nanotechnology
  • Emergency Medicine

Background:

  • Massive hemorrhage from injuries and surgery presents critical challenges in emergency medical care.
  • Current hemostatic methods are often insufficient for rapid and effective bleeding control, particularly in difficult-to-reach areas.

Purpose of the Study:

  • To develop an efficient and rapid hemostatic agent using smart nanoliposomes responsive to ultrasound.
  • To create a novel delivery system for thrombin capable of precise and localized hemostasis.

Main Methods:

  • Development of ultrasonic-responsive nanoliposomes loaded with thrombin (thrombin@liposome, TNL).
  • Incorporation of protoporphyrin as a sono-sensitive agent within liposome cavities.
  • Utilizing ultrasound to trigger singlet oxygen generation, leading to liposome structural collapse and thrombin release.

Main Results:

  • The developed TNL system demonstrated rapid and accurate local hemostasis.
  • Significant reduction in bleeding, approximately 67%, was observed in a rat hemorrhage model.
  • Thorough biocompatibility and biodegradability assessments confirmed excellent biosafety of TNL.

Conclusions:

  • Smart nanoliposomes offer a promising new avenue for efficient and precise hemostasis in emergency scenarios.
  • Ultrasound-triggered thrombin release from TNL provides a targeted approach to control massive hemorrhage.
  • The excellent biosafety profile of TNL supports its potential clinical application.