Combination of mutant EL-4 thymoma cells and EBV-infection in B lymphocyte activation a) EBV-infection of EL-4-activated lymphocytes. b) Use of EL-4 cells as feeders for lymphoblastoid cell lines.

W. Barcellini, M. O. Borghi, F. Nicoletti, P. Bonara, C. Fain, P. L. Meroni

Research output: Contribution to journalArticlepeer-review

Abstract

The combination of mutant EL-4 thymoma cells and Epstein-Barr virus (EBV)-infection in the activation of human B lymphocytes was studied with two approaches: a) limiting numbers of B cells were first activated by EL-4 contact in order to expand the B cell population and then infected with EBV. Results show that EBV could induce further Ig synthesis, although was unable to determine proliferation or to generate immortalized lines from EL-4 activated cells. b) EL-4 cells were compared to conventional PBM as feeders for cultures of established lymphoblastoid cell lines (LCL) at low cell densities. EL-4 feeder activity was strictly dependent on the presence of phorbol-myristate-acetate (PMA) and supernatant from stimulated T-lymphocytes (T-SN). EL-4 feeders induced earlier proliferation peak and greater Ig synthesis by LCL. The latter effect could be also mediated by the addition of PMA and T-SN, even if a cooperating cell-to-cell signal by PMA and T-SN-sensitized-EL-4 cells could not be excluded. Altogether results indicate that EL-4 cells do not represent a clear advantage over classic PBM as feeders for cultures of established LCL at low cell densities.

Original languageEnglish
Pages (from-to)21-28
Number of pages8
JournalJournal of Clinical and Laboratory Immunology
Volume33
Issue number1
Publication statusPublished - Sep 1990

ASJC Scopus subject areas

  • Immunology

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