Smokeless tobacco extract decreases IL-12 production from LPS-stimulated but increases IL-12 from IFN-γ-stimulated macrophages

Thomas M Petro, Lisa L. Anderson, Jamie S. Gowler, Xiao Juan Liu, Steven D. Schwartzbach

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Modulation of IFN-γ production from T cells by smokeless tobacco extract (STE) could be a factor in periodontal disease. The major inducer of IFN-γ from T cells is bioactive IL-12 (p70), a heterodimeric protein composed of p35 and p40 subunits, while homodimeric IL-12 p40 antagonizes bioactive IL-12. Both p70 and p40 are produced by macrophages in response to lipopolysaccharide (LPS), IFN-γ and/or CD40 ligation. To determine the impact of STE on IL-12 p40, p70 and IFN-γ, splenic T cells were stimulated with anti-CD3 while splenic macrophages were stimulated with LPS in the presence or absence of STE. Production of IL-12 p40 and p70 from LPS-stimulated splenic macrophages and IL-12 p40, p70 and IFN-γ from LPS/anti-CD3-stimulated T cells and macrophages was decreased by STE. To determine the impact of STE on macrophage IL-12 production alone, splenic or peritoneal macrophages were enriched and then stimulated. STE significantly diminished production of IL-12 p40 and p70 from LPS-stimulated peritoneal macrophages, LPS/IFN-γ-stimulated peritoneal and splenic macrophages, but increased production of IL-12 p40 and p70 from IFN-γ/CD40-stimulated splenic macrophages or IFN-γ-stimulated peritoneal macrophages. None of the effects of STE on IL-12 was due to nicotine, rutin or chlorogenic acid. In contrast to STE, nicotine at 100 μg/ml significantly elevated production of IL-12 p40 and p70 from splenic macrophages stimulate by IFN-γ/LPS. The results indicate that STE has a significant overall effect upon IL-12 production. It suppresses p40 and p70 production during responses to LPS or LPS/IFN-γ but augments p40 and p70 production during responses to IFN-γ without LPS. This affect could have a major impact on diseases associated with excessive production of IL-12.

Original languageEnglish (US)
Pages (from-to)345-355
Number of pages11
JournalInternational Immunopharmacology
Volume2
Issue number2-3
DOIs
StatePublished - Jan 29 2002

Fingerprint

Smokeless Tobacco
Interleukin-12
Lipopolysaccharides
Macrophages
Peritoneal Macrophages
T-Lymphocytes
Nicotine
adjuvant P40
Chlorogenic Acid
Rutin
Periodontal Diseases
Ligation

Keywords

  • IL-12
  • Macrophages
  • Mice
  • T cells
  • Tobacco

ASJC Scopus subject areas

  • Immunology
  • Pharmacology

Cite this

Smokeless tobacco extract decreases IL-12 production from LPS-stimulated but increases IL-12 from IFN-γ-stimulated macrophages. / Petro, Thomas M; Anderson, Lisa L.; Gowler, Jamie S.; Liu, Xiao Juan; Schwartzbach, Steven D.

In: International Immunopharmacology, Vol. 2, No. 2-3, 29.01.2002, p. 345-355.

Research output: Contribution to journalArticle

Petro, Thomas M ; Anderson, Lisa L. ; Gowler, Jamie S. ; Liu, Xiao Juan ; Schwartzbach, Steven D. / Smokeless tobacco extract decreases IL-12 production from LPS-stimulated but increases IL-12 from IFN-γ-stimulated macrophages. In: International Immunopharmacology. 2002 ; Vol. 2, No. 2-3. pp. 345-355.
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abstract = "Modulation of IFN-γ production from T cells by smokeless tobacco extract (STE) could be a factor in periodontal disease. The major inducer of IFN-γ from T cells is bioactive IL-12 (p70), a heterodimeric protein composed of p35 and p40 subunits, while homodimeric IL-12 p40 antagonizes bioactive IL-12. Both p70 and p40 are produced by macrophages in response to lipopolysaccharide (LPS), IFN-γ and/or CD40 ligation. To determine the impact of STE on IL-12 p40, p70 and IFN-γ, splenic T cells were stimulated with anti-CD3 while splenic macrophages were stimulated with LPS in the presence or absence of STE. Production of IL-12 p40 and p70 from LPS-stimulated splenic macrophages and IL-12 p40, p70 and IFN-γ from LPS/anti-CD3-stimulated T cells and macrophages was decreased by STE. To determine the impact of STE on macrophage IL-12 production alone, splenic or peritoneal macrophages were enriched and then stimulated. STE significantly diminished production of IL-12 p40 and p70 from LPS-stimulated peritoneal macrophages, LPS/IFN-γ-stimulated peritoneal and splenic macrophages, but increased production of IL-12 p40 and p70 from IFN-γ/CD40-stimulated splenic macrophages or IFN-γ-stimulated peritoneal macrophages. None of the effects of STE on IL-12 was due to nicotine, rutin or chlorogenic acid. In contrast to STE, nicotine at 100 μg/ml significantly elevated production of IL-12 p40 and p70 from splenic macrophages stimulate by IFN-γ/LPS. The results indicate that STE has a significant overall effect upon IL-12 production. It suppresses p40 and p70 production during responses to LPS or LPS/IFN-γ but augments p40 and p70 production during responses to IFN-γ without LPS. This affect could have a major impact on diseases associated with excessive production of IL-12.",
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