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Site-targeted drug delivery systems enhance therapeutic efficacy while minimizing systemic toxicity and treatment costs. Unlike conventional methods, these systems ensure precise drug delivery, improving bioavailability and reducing side effects. Targeted drug delivery is classified into three levels. First-order targeting directs drugs to the capillary beds of specific organs or tissues. Second-order targets specific cell types, such as tumor cells, using receptor-mediated interactions.
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Hemostasis is a crucial process that prevents excessive blood loss from damaged blood vessels. It involves various mechanisms such as vasoconstriction, platelet adhesion and activation, and fibrin formation. The importance of each mechanism depends on the type of vessel injury. In contrast, thrombosis is the abnormal formation of a blood clot within the blood vessels, leading to potential complications if the clot obstructs blood flow. Thrombosis can be caused by increased coagulability of the...
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Related Experiment Video

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A Facile and Efficient Approach for the Production of Reversible Disulfide Cross-linked Micelles
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Targeted antithrombotic protein micelles.

Wookhyun Kim1, Carolyn Haller, Erbin Dai

  • 1Department of Surgery, Beth Israel Deaconess Medical Center, Harvard Medical School, 110 Francis St, Suite 9F, Boston, MA 02115 (USA); the Wyss Institute of Biologically Inspired Engineering of Harvard University, Boston, MA (USA).

Angewandte Chemie (International Ed. in English)
|December 16, 2014
PubMed
Summary
This summary is machine-generated.

Researchers developed novel protein micelles for targeting activated platelets. These micelles enable efficient thrombus detection and inhibition, offering potential for treating acute thrombotic events.

Keywords:
bioconjugationdrug deliverymicellestherapeutic proteinsthrombosis

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Area of Science:

  • Biotechnology
  • Biomaterials Science
  • Nanomedicine

Background:

  • Activated platelets are key targets for imaging and treating inflammatory and thrombotic events.
  • Site-specific delivery of therapeutics to activated platelets remains a challenge.

Purpose of the Study:

  • To develop multifunctional protein micelles for targeting activated platelets.
  • To enable both imaging and therapeutic intervention at thrombotic sites.

Main Methods:

  • One-pot transpeptidation using evolved sortase A to create protein micelles.
  • Conjugation of a single-chain antibody (scFv) targeting activated GPIIb/IIIa receptors.
  • Incorporation of thrombomodulin (TM) for local activated protein C generation.

Main Results:

  • Successfully prepared multifunctional protein micelles.
  • Demonstrated efficient detection of thrombi via scFv targeting.
  • Showcased inhibition of thrombus formation through TM-mediated activated protein C generation.

Conclusions:

  • Developed a versatile protein micelle platform for targeting activated platelets.
  • This strategy holds significant potential for treating acute thrombotic events.
  • The approach allows for combined diagnostic and therapeutic applications.