The biphasic immunoregulation of pyrimidylpiperazine (Y-40138) is IL-10 sensitive and requires NF-κB targeting in the alveolar epithelium

J. J. E. Haddad (Lead / Corresponding author), B. Safieh-Garabedian, N. E. Saadé, S. C. Land

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

1. Pyrimidylpiperazine (Y-40138), a synthetic derivative of N-[1-(4-{[4-(pyrimidin-2-yl)piperazin-1-yl]methyl}phenyl)cyclopropyl] acetamide, is a novel dual regulator of pro- and anti-inflammatory cytokines in vivo. The aim of the present study was to determine the signal transduction mechanisms implicated in vitro. 2. In alveolar epithelial cells, pre-treatment (30 min) with Y-40138 reduced LPS-induced biosynthesis of IL-1β, IL-6 and TNF-α, an effect paralleled by up-regulating an anti-inflammatory counter-loop mediated through IL-10. 3. This differential regulation of pro- and anti-inflammatory signals was accompanied by an inhibition of the nuclear localization of selective NF-κB subunits, particularly NF-κB1 (p50), RelA (p65), the major transactivating member of the Rel family, RelB (p68) and c-Rel (p75). In addition, Y-40138 blockaded, in a dose-dependent manner, the LPS-induced nuclear activation of NF-κB. 4. Analysis of the upstream pathway involved in Y-40138-dependent retardation of LPS-induced NF-κB translocation/activation revealed the involvement of an IκB-α sensitive pathway. Pre-treatment with Y-40138 ameliorated LPS-induced degradation of IκB-α in the cytosolic compartment and retarded its phosphorylation, suggesting the involvement of an upstream kinase. 5. Recombinant IL-10 (0-10 ng ml-1) blockaded, in a dose-dependent manner, LPS-induced biosynthesis of IL-1β, IL-6 and TNF-α. Furthermore, rhIL-10 reduced the DNA binding activity of NF-κB. Immunoneutralization of endogenous IL-10 by a polyclonal αIL-10 (5 μg ml-1) reversed the inhibitory effect of Y-40138 on pro-inflammatory cytokines and partially restored the DNA binding activity of NF-κB. 6. These results indicate that Y-40138 mediated dual immunoregulation of pro- and anti-inflammatory cytokines is IL-10 sensitive and mediated through the IκB-α/NF-κB signal transduction pathway.

Original languageEnglish
Pages (from-to)49-60
Number of pages12
JournalBritish Journal of Pharmacology
Volume133
Issue number1
DOIs
Publication statusPublished - May 2001

Fingerprint

Interleukin-10
Epithelium
Anti-Inflammatory Agents
Cytokines
Interleukin-1
Proto-Oncogene Proteins c-rel
Interleukin-6
Signal Transduction
Alveolar Epithelial Cells
Y 39041
DNA
Interleukin-5
Phosphotransferases
Phosphorylation

Keywords

  • Cytokines
  • Endotoxin
  • IL-10
  • Immunopharmacology
  • IκB-α
  • NF-κB
  • Pathophysiology

Cite this

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title = "The biphasic immunoregulation of pyrimidylpiperazine (Y-40138) is IL-10 sensitive and requires NF-κB targeting in the alveolar epithelium",
abstract = "1. Pyrimidylpiperazine (Y-40138), a synthetic derivative of N-[1-(4-{[4-(pyrimidin-2-yl)piperazin-1-yl]methyl}phenyl)cyclopropyl] acetamide, is a novel dual regulator of pro- and anti-inflammatory cytokines in vivo. The aim of the present study was to determine the signal transduction mechanisms implicated in vitro. 2. In alveolar epithelial cells, pre-treatment (30 min) with Y-40138 reduced LPS-induced biosynthesis of IL-1β, IL-6 and TNF-α, an effect paralleled by up-regulating an anti-inflammatory counter-loop mediated through IL-10. 3. This differential regulation of pro- and anti-inflammatory signals was accompanied by an inhibition of the nuclear localization of selective NF-κB subunits, particularly NF-κB1 (p50), RelA (p65), the major transactivating member of the Rel family, RelB (p68) and c-Rel (p75). In addition, Y-40138 blockaded, in a dose-dependent manner, the LPS-induced nuclear activation of NF-κB. 4. Analysis of the upstream pathway involved in Y-40138-dependent retardation of LPS-induced NF-κB translocation/activation revealed the involvement of an IκB-α sensitive pathway. Pre-treatment with Y-40138 ameliorated LPS-induced degradation of IκB-α in the cytosolic compartment and retarded its phosphorylation, suggesting the involvement of an upstream kinase. 5. Recombinant IL-10 (0-10 ng ml-1) blockaded, in a dose-dependent manner, LPS-induced biosynthesis of IL-1β, IL-6 and TNF-α. Furthermore, rhIL-10 reduced the DNA binding activity of NF-κB. Immunoneutralization of endogenous IL-10 by a polyclonal αIL-10 (5 μg ml-1) reversed the inhibitory effect of Y-40138 on pro-inflammatory cytokines and partially restored the DNA binding activity of NF-κB. 6. These results indicate that Y-40138 mediated dual immunoregulation of pro- and anti-inflammatory cytokines is IL-10 sensitive and mediated through the IκB-α/NF-κB signal transduction pathway.",
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The biphasic immunoregulation of pyrimidylpiperazine (Y-40138) is IL-10 sensitive and requires NF-κB targeting in the alveolar epithelium. / Haddad, J. J. E. (Lead / Corresponding author); Safieh-Garabedian, B.; Saadé, N. E.; Land, S. C.

In: British Journal of Pharmacology, Vol. 133, No. 1, 05.2001, p. 49-60.

Research output: Contribution to journalArticle

TY - JOUR

T1 - The biphasic immunoregulation of pyrimidylpiperazine (Y-40138) is IL-10 sensitive and requires NF-κB targeting in the alveolar epithelium

AU - Haddad, J. J. E.

AU - Safieh-Garabedian, B.

AU - Saadé, N. E.

AU - Land, S. C.

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N2 - 1. Pyrimidylpiperazine (Y-40138), a synthetic derivative of N-[1-(4-{[4-(pyrimidin-2-yl)piperazin-1-yl]methyl}phenyl)cyclopropyl] acetamide, is a novel dual regulator of pro- and anti-inflammatory cytokines in vivo. The aim of the present study was to determine the signal transduction mechanisms implicated in vitro. 2. In alveolar epithelial cells, pre-treatment (30 min) with Y-40138 reduced LPS-induced biosynthesis of IL-1β, IL-6 and TNF-α, an effect paralleled by up-regulating an anti-inflammatory counter-loop mediated through IL-10. 3. This differential regulation of pro- and anti-inflammatory signals was accompanied by an inhibition of the nuclear localization of selective NF-κB subunits, particularly NF-κB1 (p50), RelA (p65), the major transactivating member of the Rel family, RelB (p68) and c-Rel (p75). In addition, Y-40138 blockaded, in a dose-dependent manner, the LPS-induced nuclear activation of NF-κB. 4. Analysis of the upstream pathway involved in Y-40138-dependent retardation of LPS-induced NF-κB translocation/activation revealed the involvement of an IκB-α sensitive pathway. Pre-treatment with Y-40138 ameliorated LPS-induced degradation of IκB-α in the cytosolic compartment and retarded its phosphorylation, suggesting the involvement of an upstream kinase. 5. Recombinant IL-10 (0-10 ng ml-1) blockaded, in a dose-dependent manner, LPS-induced biosynthesis of IL-1β, IL-6 and TNF-α. Furthermore, rhIL-10 reduced the DNA binding activity of NF-κB. Immunoneutralization of endogenous IL-10 by a polyclonal αIL-10 (5 μg ml-1) reversed the inhibitory effect of Y-40138 on pro-inflammatory cytokines and partially restored the DNA binding activity of NF-κB. 6. These results indicate that Y-40138 mediated dual immunoregulation of pro- and anti-inflammatory cytokines is IL-10 sensitive and mediated through the IκB-α/NF-κB signal transduction pathway.

AB - 1. Pyrimidylpiperazine (Y-40138), a synthetic derivative of N-[1-(4-{[4-(pyrimidin-2-yl)piperazin-1-yl]methyl}phenyl)cyclopropyl] acetamide, is a novel dual regulator of pro- and anti-inflammatory cytokines in vivo. The aim of the present study was to determine the signal transduction mechanisms implicated in vitro. 2. In alveolar epithelial cells, pre-treatment (30 min) with Y-40138 reduced LPS-induced biosynthesis of IL-1β, IL-6 and TNF-α, an effect paralleled by up-regulating an anti-inflammatory counter-loop mediated through IL-10. 3. This differential regulation of pro- and anti-inflammatory signals was accompanied by an inhibition of the nuclear localization of selective NF-κB subunits, particularly NF-κB1 (p50), RelA (p65), the major transactivating member of the Rel family, RelB (p68) and c-Rel (p75). In addition, Y-40138 blockaded, in a dose-dependent manner, the LPS-induced nuclear activation of NF-κB. 4. Analysis of the upstream pathway involved in Y-40138-dependent retardation of LPS-induced NF-κB translocation/activation revealed the involvement of an IκB-α sensitive pathway. Pre-treatment with Y-40138 ameliorated LPS-induced degradation of IκB-α in the cytosolic compartment and retarded its phosphorylation, suggesting the involvement of an upstream kinase. 5. Recombinant IL-10 (0-10 ng ml-1) blockaded, in a dose-dependent manner, LPS-induced biosynthesis of IL-1β, IL-6 and TNF-α. Furthermore, rhIL-10 reduced the DNA binding activity of NF-κB. Immunoneutralization of endogenous IL-10 by a polyclonal αIL-10 (5 μg ml-1) reversed the inhibitory effect of Y-40138 on pro-inflammatory cytokines and partially restored the DNA binding activity of NF-κB. 6. These results indicate that Y-40138 mediated dual immunoregulation of pro- and anti-inflammatory cytokines is IL-10 sensitive and mediated through the IκB-α/NF-κB signal transduction pathway.

KW - Cytokines

KW - Endotoxin

KW - IL-10

KW - Immunopharmacology

KW - IκB-α

KW - NF-κB

KW - Pathophysiology

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U2 - 10.1038/sj.bjp.0704041

DO - 10.1038/sj.bjp.0704041

M3 - Article

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JO - British Journal of Pharmacology

JF - British Journal of Pharmacology

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ER -