Pulmonary persistence of graphene nanoplatelets may disturb physiological and immunological homeostasis

Eun Jung Park, Sang Jin Lee, Kyuhong Lee, Young Chul Choi, Byoung Seok Lee, Gwang Hee Lee, Dong-Wan Kim

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Accumulated evidence suggests that chronic pulmonary accumulation of harmful particles cause adverse pulmonary and systemic health effects. In our previous study, most of the graphene nanoplatelet (GNP) remained in the lung until 28days after a single instillation. In this study, we sought to evaluate the local and systemic health effect after a long pulmonary persistence of GNP. As expected, GNP remained in the lung on day 90 after a single intratracheal instillation (1.25, 2.5 and 5mgkg-1). In the lung exposed at the highest dose, the total number of cells and the percentage of lymphocytes significantly increased in the BAL fluid with an increase in both the number of GNP-engulfed macrophages and the percentage of apoptotic cells. A Th1-shifted immune response, the elevated chemokine secretion and the enhanced expression of cytoskeletal-related genes were observed. Additionally, the expression of natriuretic-related genes was noteworthy altered in the lungs. Moreover, the number of white blood cells (WBC) and the percentage of macrophages and neutrophils clearly increased in the blood of mice exposed to a 5-mgkg-1 dose, whereas total protein, BUN and potassium levels significantly decreased. In conclusion, we suggest that the long persistence of GNP in the lung may cause adverse health effects by disturbing immunological- and physiological-homeostasis of our body.

Original languageEnglish
JournalJournal of Applied Toxicology
DOIs
Publication statusAccepted/In press - 2016

Keywords

  • Antigen presentation
  • Graphene
  • Immune regulation
  • Immunotoxicity
  • Nanoplatelets
  • Physiology

ASJC Scopus subject areas

  • Toxicology

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