Prolonged Release Period of Nitric Oxide Gas for Treatment of Bacterial Keratitis by Amine-Rich Polymer Decoration of Nanoparticles

Hyejoong Jeong, Joo Hee Park, Jae Ho Shin, Jae Chan Yoo, Choul Yong Park, Jinkee Hong

Research output: Contribution to journalArticlepeer-review

36 Citations (Scopus)


Exogeneous nitric oxide (NO) delivery is a promising therapeutic method because NO is a significant cell signaling molecule to control physiological functions. A major challenge for NO delivery is to control release due to the fast diffusion properties of gaseous molecules with low molecular weight. It is important in biomedical applications to mitigate initial burst emissions because higher concentrations of reactive NO cause cytotoxicity and tissue damage. In this study, a nanoparticle system is developed to control spontaneous gas release on the basis of surface-modified silica nanoparticles (Si NPs) by branched polyethylene imine (BPEI). BPEI is not only a scaffold of N-diazeniumdiolates - a type of NO donor - and but also a stabilizer of donors by molecular interactions with nearby amine groups. With the sustained-release manner, BPEI-coated NO-releasing Si NPs (BPEI-NO NPs) have multifunctional properties, including bactericidal efficacies as well as good cell viability for human cells. An improved ocular wound recovery is achieved in the mouse keratitis model. This study demonstrates the great potential of the NO-releasing NP as a multifunctional nanotherapeutic in biomedical applications.

Original languageEnglish
Pages (from-to)8528-8537
Number of pages10
JournalChemistry of Materials
Issue number23
Publication statusPublished - 2018 Dec 11

Bibliographical note

Funding Information:
This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science and ICT (NRF-2017R1E1A1A01074343). Additionally, this research was supported by a grant from the Korea Health Technology R&D Project through the Korea Health Industry Development Institute (KHIDI), funded by the Ministry of Health & Welfare, Republic of Korea (HI15C-1653).

Publisher Copyright:
Copyright © 2018 American Chemical Society.

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Chemistry


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