title: P-glycoprotein (encoded by multidrug resistance genes) is not required for interleukin-2 secretion in mice and humans.
abstract: P-glycoprotein (encoded by multidrug resistance genes), a member of the ATP-binding cassette transporter protein superfamily, has been shown to play a role in the secretion of cytokines. This conclusion was based upon the inhibition of cytokine secretion by anti-P-gp monoclonal antibodies. In this study, we show that anti-CD3-stimulated lymphocytes from wild-type, mdr1a knock out and mdr1ab double knock out mice produce similar amounts of IL-2, IFN-gamma, IL-4, and IL-10. In addition, Jurkat T cells that lack P-gp and MDR1-transfected Jurkat T cells (JurkatP-gp) as well as purified human peripheral blood CD4+ P-gp+ and CD4+ P-gp- and CD8+ P-gp+ and CD8+ P-gp- T cell subsets produced comparable amounts of IL-2. These data show that P-gp is not required for secretion of IL-2, IFN-gamma, IL-4, and IL-10 secretion in mice and IL-2 secretion in humans.
authors.affiliation: Molecular Biology and Cellular Immunology Laboratories, Division of Basic and Clinical Immunology, University of California, Irvine, CA 92697-4069, USA.
authors.forename: S
authors.initials: S
authors.lastname: Gollapudi
authors.forename: C
authors.initials: C
authors.lastname: Kim
authors.forename: S
authors.initials: S
authors.lastname: Gupta
mesh_terms: D020168:ATP Binding Cassette Transporter, Subfamily B, Member 1 / Q000235:genetics*; D000818:Animals; D001483:Base Sequence; D015496:CD4-Positive T-Lymphocytes / Q000166:cytology / Q000276:immunology / Q000378:metabolism; D018414:CD8-Positive T-Lymphocytes / Q000166:cytology / Q000276:immunology / Q000378:metabolism; D002455:Cell Division; D004247:DNA / Q000096:biosynthesis; D017931:DNA Primers / Q000235:genetics; D019450:Genes, MDR; D006801:Humans; D066298:In Vitro Techniques; D007371:Interferon-gamma / Q000378:metabolism; D016753:Interleukin-10 / Q000378:metabolism; D007376:Interleukin-2 / Q000378:metabolism*; D015847:Interleukin-4 / Q000378:metabolism; D019169:Jurkat Cells; D008297:Male; D051379:Mice; D018345:Mice, Knockout; D020133:Reverse Transcriptase Polymerase Chain Reaction; D014162:Transfection
chemical_list: D020168:ATP Binding Cassette Transporter, Subfamily B, Member 1; D017931:DNA Primers; D007376:Interleukin-2; D016753:Interleukin-10; D015847:Interleukin-4; D007371:Interferon-gamma; D004247:DNA