Interferon γ and interleukin 4 stimulate prolonged expression of inducible nitric oxide synthase in human airway epithelium through synthesis of soluble mediators

Fuhua H. Guo, Kohsaku Uetani, S. Jaharul Haque, Bryan R G Williams, Raed A. Dweik, Frederik B J M Thunnissen, William Calhoun, Serpil C. Erzurum

Research output: Contribution to journalArticle

149 Citations (Scopus)

Abstract

Human respiratory epithelium expresses inducible nitric oxide synthase (iNOS) continuously in vivo, however mechanisms responsible for maintenance of expression are not known. We show that IFNγ is sufficient for induction of iNOS in primary human airway epithelial cells (HAEC) in vitro, and IL-4 potentiates IFNγ-induced iNOS expression in HAEC through stabilization of iNOS mRNA. IFNγ/IL-4-induced iNOS expression in HAEC was delayed in onset and prolonged with expression up to 1 wk. Removal of overlying culture media resulted in loss of expression, while transfer of conditioned media induced iNOS mRNA in other HAEC. IFNγ and IL-4 stimulation activated STAT1 and STAT6 in HAEC, but conditioned media transfer to HAEC produced even higher levels of STAT1 activation than achieved by direct addition of cytokines. Although cytokine induction of iNOS was dependent on new protein synthesis, conditioned media induction of iNOS in HAEC was not. Further, removal of overlying culture media from cells at different times after cytokine stimulation demonstrated that mediator synthesis and/or secretion important for induction and maintenance of iNOS occurs early after cytokine stimulation. In conclusion, a combination of IFNγ/IL-4, which occurs naturally in the lung epithelial lining fluid, leads to maintenance of iNOS expression in human airway epithelium through production of soluble mediators and stabilization of mRNA.

Original languageEnglish (US)
Pages (from-to)829-838
Number of pages10
JournalJournal of Clinical Investigation
Volume100
Issue number4
StatePublished - Aug 15 1997
Externally publishedYes

Fingerprint

Nitric Oxide Synthase Type II
Interleukin-4
Interferons
Epithelium
Epithelial Cells
Conditioned Culture Medium
Cytokines
Maintenance
Messenger RNA
Culture Media
Respiratory Mucosa
Lung

Keywords

  • Cycloheximide
  • Gene expression regulation
  • Messenger RNA
  • Nitric oxide
  • Signal transduction

ASJC Scopus subject areas

  • Medicine(all)

Cite this

Guo, F. H., Uetani, K., Haque, S. J., Williams, B. R. G., Dweik, R. A., Thunnissen, F. B. J. M., ... Erzurum, S. C. (1997). Interferon γ and interleukin 4 stimulate prolonged expression of inducible nitric oxide synthase in human airway epithelium through synthesis of soluble mediators. Journal of Clinical Investigation, 100(4), 829-838.

Interferon γ and interleukin 4 stimulate prolonged expression of inducible nitric oxide synthase in human airway epithelium through synthesis of soluble mediators. / Guo, Fuhua H.; Uetani, Kohsaku; Haque, S. Jaharul; Williams, Bryan R G; Dweik, Raed A.; Thunnissen, Frederik B J M; Calhoun, William; Erzurum, Serpil C.

In: Journal of Clinical Investigation, Vol. 100, No. 4, 15.08.1997, p. 829-838.

Research output: Contribution to journalArticle

Guo, Fuhua H. ; Uetani, Kohsaku ; Haque, S. Jaharul ; Williams, Bryan R G ; Dweik, Raed A. ; Thunnissen, Frederik B J M ; Calhoun, William ; Erzurum, Serpil C. / Interferon γ and interleukin 4 stimulate prolonged expression of inducible nitric oxide synthase in human airway epithelium through synthesis of soluble mediators. In: Journal of Clinical Investigation. 1997 ; Vol. 100, No. 4. pp. 829-838.
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