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Self-assembled DNA-based giant thrombin nanoparticles for controlled release.

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Area of Science:

  • Biotechnology
  • Nanomedicine
  • Biochemistry

Background:

  • Protein-aptamer interactions are crucial for medical diagnostics and protein delivery systems.
  • Thrombin-binding aptamer (TBA) is a well-established aptamer for targeting thrombin.
  • Controlled protein release remains a challenge in therapeutic applications.

Purpose of the Study:

  • To develop a novel method for controlled thrombin delivery using giant thrombin nanoparticles (GTNPs).
  • To investigate the synthesis and characterization of GTNPs with varying sizes.
  • To demonstrate the controlled release of thrombin from GTNPs.

Main Methods:

  • GTNPs were synthesized by crosslinking thrombin with DNA nanostructures functionalized with TBA.
  • Two types of DNA nanostructures (Y-shaped and X-shaped) were used to create GTNPs of 250 nm and 650 nm.
  • Thrombin release was induced by adding complementary DNA (cDNA) to TBA and monitored using dynamic light scattering, AFM, and SEM.

Main Results:

  • Successful synthesis of GTNPs with distinct sizes (250 nm and 650 nm) was achieved.
  • A decrease in GTNP size was observed with increasing concentrations of cDNA, confirming thrombin release.
  • Characterization techniques confirmed the structural integrity and size changes of the GTNPs.

Conclusions:

  • The developed GTNP system enables effective and controllable thrombin delivery.
  • This method offers a versatile platform for the targeted delivery of various proteins.
  • The findings have significant implications for advancing protein-based therapeutics and diagnostics.