Monochloramine inhibits phorbol ester-inducible neutrophil respiratory burst activation and T cell interleukin-2 receptor expression by inhibiting inducible protein kinase C activity

Tetsuya Ogino, Hirotsugu Kobuchi, Chandan K. Sen, Sashwati Roy, Lester Packer, John J. Maguire

Research output: Contribution to journalArticlepeer-review

27 Citations (Scopus)

Abstract

Monochloramine derivatives are long lived physiological oxidants produced by neutrophils during the respiratory burst. The effects of chemically prepared monochloramine (NH2Cl) on protein kinase C (PKC) and PKC-mediated cellular responses were studied in elicited rat peritoneal neutrophils and human Jurkat T cells. Neutrophils pretreated with NH2Cl (30- 50 μM) showed a marked decrease in the respiratory burst activity induced by phorbol 12-myristate 13-acetate (PMA), winch is a potent PKC activator. These cells, however, were viable and showed a complete respiratory burst upon arachidonic acid stimulation, which induces the respiratory burst by a PKC- independent mechanism. The NH2Cl-treated neutrophils showed a decrease in both PKC activity and PMA-induced phosphorylation of a 47-kDa protein, which corresponds to the cytosolic factor of NADPH oxidase, p47(phox). Jurkat T cells pretreated with NH2Cl (20-70 μg) showed a decrease in the expression of the interleukin-2 receptor α chain following PMA stimulation. This was also accompanied by a decrease in both PKC activity and nuclear transcription factor-κB activation, also without loss of cell viability. These results show that NH2Cl inhibits PKC-mediated cellular responses through inhibition of the inducible PKC activity.

Original languageEnglish
Pages (from-to)26247-26252
Number of pages6
JournalJournal of Biological Chemistry
Volume272
Issue number42
DOIs
Publication statusPublished - Oct 17 1997

ASJC Scopus subject areas

  • Biochemistry
  • Molecular Biology
  • Cell Biology

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