Self-Assembly of Oriented Antibody-Decorated Metal–Organic Framework Nanocrystals for Active-Targeting Applications

Karen Alt*, Francesco Carraro, Edwina Jap, Mercedes Linares-Moreau, Raffaele Riccò, Marcello Righetto, Marco Bogar, Heinz Amenitsch, Rania A. Hashad, Christian Doonan, Christoph E. Hagemeyer, Paolo Falcaro

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Antibody (Ab)-targeted nanoparticles are becoming increasingly important for precision medicine. By controlling the Ab orientation, targeting properties can be enhanced; however, to afford such an ordered configuration, cumbersome chemical functionalization protocols are usually required. This aspect limits the progress of Abs-nanoparticles toward nanomedicine translation. Herein, a novel one-step synthesis of oriented monoclonal Ab-decorated metal–organic framework (MOF) nanocrystals is presented. The crystallization of a zinc-based MOF, Zn2(mIM)2(CO3), from a solution of Zn2+ and 2-methylimidazole (mIM), is triggered by the fragment crystallizable (Fc) region of the Ab. This selective growth yields biocomposites with oriented Abs on the MOF nanocrystals (MOF*Ab): the Fc regions are partially inserted within the MOF surface and the antibody-binding regions protrude from the MOF surface toward the target. This ordered configuration imparts antibody–antigen recognition properties to the biocomposite and shows preserved target binding when compared to the parental antibodies. Next, the biosensing performance of the system is tested by loading MOF*Ab with luminescent quantum dots (QD). The targeting efficiency of the QD-containing MOF*Ab is again, fully preserved. The present work represents a simple self-assembly approach for the fabrication of antibody-decorated MOF nanocrystals with broad potential for sensing, diagnostic imaging, and targeted drug delivery.

Original languageEnglish
Article number2106607
JournalAdvanced Materials
Volume34
Issue number21
DOIs
Publication statusPublished - 6 Dec 2021

Keywords

  • Antibody
  • MOFs
  • MOF biocomposites
  • Drug delivery
  • self-assembly
  • targeting
  • crystallization
  • antibodies
  • metal–organic frameworks

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Materials Science(all)

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