Bonding of Neuropeptide Y on Graphene Oxide for Drug Delivery Applications to the Central Nervous System

Giada Cellot, Lucas Jacquemin, Giacomo Reina, Audrey Franceschi Biagioni, Mario Fontanini, Olivier Chaloin, Yuta Nishina, Alberto Bianco, Laura Ballerini

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


Nanoscale graphene-based materials (GBMs) enable targeting subcellular structures of the nervous system, a feature crucial for the successful engineering of alternative nanocarriers to deliver drugs and to treat neurodisorders. Among GBMs, graphene oxide (GO) nanoflakes, showing good dispersibility in water solution and being rich of functionalizable oxygen groups, are ideal core structures for carrying biological active molecules to the brain, such as the neuropeptide Y (NPY). In addition, when unconjugated, these nanomaterials have been reported to modulate neuronal function per se. Although some GBM-based nanocarriers have been tested both in vitro and in vivo, a thorough characterization of covalent binding impact on the biological properties of the carried molecule and/or of the nanomaterial is still missing. Here, a copper(I)-catalyzed alkyne-azide cycloaddition strategy was employed to synthesize the GO-NPY complex. By investigating through electrophysiology the impact of these conjugates on the activity of hippocampal neurons, we show that the covalent modification of the nanomaterial, while making GO an inert platform for the vectorized delivery, enhances the duration of NPY pharmacological activity. These findings support the future use of GO for the development of smart platforms for nervous system drug delivery.

Original languageEnglish
Pages (from-to)17640-17651
Number of pages12
JournalACS Applied Nano Materials
Issue number12
Publication statusPublished - Dec 23 2022


  • 2D materials
  • brain diseases
  • carbon nanomaterials
  • drug delivery
  • functionalization

ASJC Scopus subject areas

  • General Materials Science


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