Mechanism of pokeweed mitogen inhibition of rhIL-4-induced human IgE synthesis.

Journal Article (Journal Article)

Pokeweed mitogen (PWM) suppressed rhIL-4-induced IgE synthesis in a concentration-dependent manner. When rhIL-4 was present from Day 0, PWM added to cultures on Day 0 or 3 inhibited MNC IgE synthesis but not when it was added on Day 6 or later. The concentration of interferon-gamma (IFN-gamma) in MNC culture supernatants varied directly with the quantity of PWM added. Conversely, rhIL-4-stimulated MNC culture IgE concentrations varied inversely with the dose of PWM added and the IFN-gamma concentrations induced. The addition of a rabbit polyclonal neutralizing anti-human IFN-gamma antibody to rhIL-4 plus PWM-stimulated cultures partially or completely reversed PWM-induced inhibition of rhIL-4-induced IgE synthesis. PWM failed to inhibit rhIL-4-induced IgE synthesis by isolated B cells cocultured with monocytes and T cells from a clone unable to produce IFN-gamma message or protein. These findings are consistent with the postulate that PWM inhibits rhIL-4-induced IgE synthesis by inducing the production of IFN-gamma.

Full Text

Duke Authors

Cited Authors

  • Claassen, JL; Levine, AD; Buckley, RH

Published Date

  • April 1992

Published In

Volume / Issue

  • 140 / 2

Start / End Page

  • 357 - 369

PubMed ID

  • 1347486

Pubmed Central ID

  • 1347486

International Standard Serial Number (ISSN)

  • 0008-8749

Digital Object Identifier (DOI)

  • 10.1016/0008-8749(92)90202-z


  • eng

Conference Location

  • Netherlands