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An intelligent DNA nanodevice for precision thrombolysis.

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This study introduces an intelligent DNA nanodevice for precise delivery of tissue plasminogen activator (tPA). The nanodevice targets thrombosis, ensuring accurate tPA dosing for improved treatment efficacy.

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Area of Science:

  • Biotechnology
  • Nanomedicine
  • Molecular Engineering

Background:

  • Thrombosis is a major cause of mortality globally.
  • Current thrombolytic therapies, like tissue plasminogen activator (tPA), have limited efficacy.
  • Precise delivery and controlled dosing of tPA are critical for effective treatment.

Purpose of the Study:

  • To develop an intelligent DNA nanodevice for precise delivery and accurate dosing of tPA.
  • To create a thrombin-responsive system for targeted tPA release at thrombosis sites.
  • To evaluate the therapeutic potential of this nanodevice in thrombosis models.

Main Methods:

  • Utilized DNA origami to construct DNA nanosheets with tPA binding sites.
  • Integrated thrombin-responsive DNA fasteners, acting as recognition and release mechanisms.
  • Administered the tPA-loaded nanodevices intravenously in vivo.
  • Assessed targeting, microemboli tracking, and tPA release based on thrombin concentration thresholds.

Main Results:

  • The DNA nanodevices demonstrated rapid targeting of thrombosis sites.
  • The nanodevices successfully tracked circulating microemboli.
  • Active tPA was exposed only when thrombin concentration exceeded a predefined threshold.
  • Improved therapeutic efficacy was observed in models of ischemic stroke and pulmonary embolism.

Conclusions:

  • The developed DNA nanodevices enable precise tPA delivery and accurate dosing.
  • This intelligent nanodelivery system shows significant potential for treating various thrombotic conditions.
  • The thrombin-responsive mechanism ensures targeted and controlled thrombolysis.