Regulatory role of IgE-binding factors from rat T lymphocytes. IV. Formation of IgE-binding factors in rats treated with complete Freund's adjuvant

M. Hirashima, J. Yodoi, K. Ishizaka

Research output: Contribution to journalArticlepeer-review

Abstract

Mesenteric lymph node (MLN) cells from rats treated with complete Freund's adjuvant (CFA) spontaneously released soluble factors, which have affinity for IgE (IgE-binding The the factors were purified by absorption of culture filtrates of the lymphocytes with IgE-Sepharose followed by elution at acid pH. Purified IgE-binding factors selectively suppressed IgE-forming cell response of DNP-ovalbumin-primed MLN cells to homologous antigen without affecting the IgG2 response. Fractionation of purified IgE-binding factors on lentil lectin-Sepharose showed that the majority of IgE-binding factors did not have affinity for lentil lectin, whereas a minor fraction was bound to the lectin-coupled beads. It was found that IgE-binding factors lacking affinity for lentil lectin suppressed IgE response, whereas those eluted from lentil lectin-Sepharose selectively enhanced IgE response. Serum of CFA-treated animals also contained both IgE-suppressive factor and IgE-potentiating factor, and the amount of the former factor was more than the latter. The source of IgE-suppressive factor is non-B lymphocytes. Depletion of Fc(ε) receptor(+) lymphocytes in MLN cells from CFA-treated animals did not affect the formation of IgE-suppressive factor, indicating that Fc(ε)R-bearing cells are not the source of the factor.

Original languageEnglish (US)
Pages (from-to)2154-2160
Number of pages7
JournalJournal of Immunology
Volume125
Issue number5
StatePublished - 1980

ASJC Scopus subject areas

  • Immunology and Allergy
  • Immunology

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