Particles internalization, oxidative stress, apoptosis and pro-inflammatory cytokines in alveolar macrophages exposed to cement dust

John Ogunbileje, Ranjana Nawgiri, J. I. Anetor, O. M. Akinosun, E. O. Farombi, Anthony Okorodudu

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Exposure to cement dust is one of the most common occupational dust exposures worldwide, but the mechanism of toxicity has not been fully elucidated. Cement dust (N) and clinker (C) samples collected from Nigeria and another sample of cement dust (U) collected from USA were evaluated using alveolar macrophage (NR8383) cell culture to determine the contribution of different sources of cement dust in the severity of cement dust toxicity. Cement dust particles internalization and morphologic alterations using transmission electron microscopy (TEM), cytotoxicity, apoptotic cells induction, intracellular reactive oxygen species generation, glutathione reduction, TNF-α, IL-1β, and CINC-3 secretion in alveolar macrophages (NR8383) exposed to cement dust and clinker samples were determined. Particles were internalized into the cytoplasmic vacuoles, with cells exposed to U showing increased cell membrane blebbing. Also, NR8383 exposed to U show more significant ROS generation, apoptotic cells induction and decreased glutathione. Interleukin-1β and TNF-α secretion were significantly more in cells exposed to both cement dust samples compared with clinker, while CINC-3 secretion was significantly more in cells exposed to clinker (p<0.05). Endocytosis, oxidative stress induced-apoptosis and induction of pro-inflammatory cytokines may be key mechanisms of cement dust immunotoxicity in the lung and toxicity may be factory dependent.

Original languageEnglish (US)
Pages (from-to)1060-1070
Number of pages11
JournalEnvironmental Toxicology and Pharmacology
Volume37
Issue number3
DOIs
StatePublished - 2014

Fingerprint

Oxidative stress
Alveolar Macrophages
Dust
Cements
Oxidative Stress
Apoptosis
Cytokines
Toxicity
Interleukin-1
Particles (particulate matter)
Glutathione
Cells
Pyroptosis
Occupational Exposure
Cell membranes
Blister
Cytotoxicity
Nigeria
Endocytosis
Vacuoles

Keywords

  • Cement dust
  • Endocytosis
  • Lung
  • Oxidative stress induced-apoptosis
  • Pro-inflammatory cytokines

ASJC Scopus subject areas

  • Toxicology
  • Health, Toxicology and Mutagenesis
  • Pharmacology
  • Medicine(all)

Cite this

Particles internalization, oxidative stress, apoptosis and pro-inflammatory cytokines in alveolar macrophages exposed to cement dust. / Ogunbileje, John; Nawgiri, Ranjana; Anetor, J. I.; Akinosun, O. M.; Farombi, E. O.; Okorodudu, Anthony.

In: Environmental Toxicology and Pharmacology, Vol. 37, No. 3, 2014, p. 1060-1070.

Research output: Contribution to journalArticle

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