Mast cells contribute to altered vascular reactivity and ischemia-reperfusion injury following cerium oxide nanoparticle instillation

Christopher J. Wingard, Dianne M. Walters, Brook L. Cathey, Susana C. Hilderbrand, Pranita Katwa, Sijie Lin, Pu Chun Ke, Ramakrishna Podila, Apparao Rao, Robert M. Lust, Jared M. Brown

Research output: Contribution to journalArticleResearchpeer-review

58 Citations (Scopus)

Abstract

Cerium oxide (CeO2) represents an important nanomaterial with wide ranging applications. However, little is known regarding how CeO2 exposure may influence pulmonary or systemic inflammation. Furthermore, how mast cells would influence inflammatory responses to a nanoparticle exposure is unknown. We thus compared pulmonary and cardiovascular responses between C57BL/6 and B6.Cg-Kit W-sh mast cell deficient mice following CeO2 nanoparticle instillation. C57BL/6 mice instilled with CeO2 exhibited mild pulmonary inflammation. However, B6.Cg-Kit W-sh mice did not display a similar degree of inflammation following CeO2 instillation. Moreover, C57BL/6 mice instilled with CeO2 exhibited altered aortic vascular responses to adenosine and an increase in myocardial ischemia/reperfusion injury which was absent in B6.Cg-Kit W-sh mice. In vitro CeO2 exposure resulted in increased production of PGD2, TNF-α, IL-6 and osteopontin by cultured mast cells. These findings demonstrate that CeO2 nanoparticles activate mast cells contributing to pulmonary inflammation, impairment of vascular relaxation and exacerbation of myocardial ischemia/reperfusion injury.

Original languageEnglish
Pages (from-to)531-545
Number of pages15
JournalNanotoxicology
Volume5
Issue number4
DOIs
Publication statusPublished - Dec 2011
Externally publishedYes

Keywords

  • Ischemia-reperfusion injury
  • Mast cell
  • Mast cell deficient mice
  • Osteopontin
  • Sash mice

Cite this