IgE formation in the rat following infection with Nippostrongylus brasiliensis. III. Soluble factor for the generation of IgE bearing lymphocytes

J. F. Urban, T. Ishizaka, K. Ishizaka

Research output: Contribution to journalArticlepeer-review

Abstract

Normal rat bone marrow cells incubated with serum or lymph from Nippostrongylus brasiliensis (Nb)-infected rats showed an increase in the proportion of IgE-bearing cells in culture. This effect was produced in a similar fashion by cell-free supernatants (CFS) from cultures of mesenteric lymph node cells obtained from Nb-infected rats. The action of CFS on bone marrow cells appeared to be specific for the generation of IgE-bearing cells since the proportion of IgM-bearing cells in the culture did not change. The IgE-bearing cells in bone marrow cell cultures consisted of small lymphocytes, blast cells, and mast cells, and the addition of CFS to the cultures predominantly increased the number of IgE-bearing blast cells. CFS was also effective in increasing the proportion of IgE-bearing small lymphocytes in cultures of normal mesenteric lymph node cells. Removal of the IgE in CFS by an anti-IgE immunosorbent did not affect the ability of CFS to generate IgE-bearing cells. The factor(s) in CFS responsible for this activity was shown to migrate with serum β-globulins in zone electrophoresis and to possess a molecular size of between 104 and 2 x 104 m.w. The ability of CFS to generate IgE-bearing cells was diminished by treatment with the enzymes trypsin and ribonuclease A, but was unaffected by chymotrypsin.

Original languageEnglish (US)
Pages (from-to)583-590
Number of pages8
JournalJournal of Immunology
Volume119
Issue number2
StatePublished - Dec 1 1977

ASJC Scopus subject areas

  • Immunology and Allergy
  • Immunology

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