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Manufacture and Drug Delivery Applications of Silk Nanoparticles
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Bioinspired Nanoparticles Engineered for Enhanced Delivery to the Bone.

Andrew S Gdowski1, Jana B Lampe1, Victor J T Lin1

  • 1University of North Texas Health Science Center, 3500 Camp Bowie Boulevard, Fort Worth, Texas 76107, United States.

ACS Applied Nano Materials
|February 15, 2021
PubMed
Summary

Researchers developed programmable-bioinspired nanoparticles (P-BiNPs) to target bone and cancer cells. This novel drug delivery system enhances homotypic binding and bone localization for improved therapeutic strategies.

Keywords:
bioinspiredbiomimeticbonenanoparticleprostatetargeted nanoparticle deliveryαVβ3

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Area of Science:

  • Biomaterials Science
  • Nanotechnology
  • Oncology

Background:

  • Targeting therapies to specific organs, particularly bone, is a significant challenge in systemic drug delivery.
  • Metastatic prostate cancer frequently affects bone, necessitating targeted delivery systems for effective treatment and imaging.

Purpose of the Study:

  • To engineer a programmable-bioinspired nanoparticle (P-BiNP) system for simultaneous bone targeting and enhanced homotypic tumor cell uptake.
  • To leverage clinical bioinformatics to guide nanoparticle design for mimicking biological processes.

Main Methods:

  • Coating polymeric nanoparticles with cancer cell membranes overexpressing specific integrins.
  • Utilizing RNA expression data from metastatic prostate cancer patients to identify ITGB3 (integrin αVβ3) as a target.
  • Stimulating cancer cells to increase ITGB3 expression and using their membranes for nanoparticle coating.
  • Physicochemical characterization, in vitro binding/uptake assays, and in vivo bone localization studies in a murine model.

Main Results:

  • P-BiNPs exhibited optimal physicochemical properties (size, ζ potential, stability).
  • In vitro studies confirmed enhanced homotypic binding and cellular uptake in cancer cells.
  • In vivo experiments demonstrated improved bone localization of P-BiNPs in a murine model.

Conclusions:

  • The P-BiNP system effectively targets both bone and homotypic tumor cells, addressing a key challenge in drug delivery.
  • This bioinspired, clinically informed approach offers a promising strategy for bone-related disease treatment and imaging.
  • The methodology has broader implications for organ-specific nanoparticle delivery systems.