title: CCA (disodium 4-chloro-2,2'-iminodibenzoate) inhibits progression of human T cell proliferation triggered by PHA.
abstract: The effect of the anti-rheumatic drug CCA (disodium 4-chloro-2,2'-iminodibenzoate) on the proliferation of T cells activated by PHA was examined. Cell cycle analysis showed that CCA blocked the transition of the cells from G1 to S (progression), but had little effect on the G0----G1 transition (initiation). CCA had no significant effect on IL-2 receptor expression, an early G1 event, but did inhibit transferrin receptor expression, a late G1 event. CCA did not inhibit IL-2 production by PHA-activated T cells, but did block IFN-gamma production at 72 hr after the stimulation. CCA failed to inhibit c-myc mRNA induction, but did delay the decrease in c-myc mRNA levels that normally occurs with the onset of DNA synthesis. These results indicate that CCA inhibits the progression, but not initiation, of human T cell proliferation.
authors.affiliation: Tokyo Institute for Immunopharmacology, Inc., Japan.
authors.forename: K
authors.initials: K
authors.lastname: Katagiri
authors.forename: T
authors.initials: T
authors.lastname: Nakano
authors.forename: Y
authors.initials: Y
authors.lastname: Sugawara
authors.forename: Y
authors.initials: Y
authors.lastname: Ichikawa
authors.forename: T
authors.initials: T
authors.lastname: Yoshida
mesh_terms: D002453:Cell Cycle / Q000187:drug effects; D006801:Humans; D007166:Immunosuppressive Agents / Q000494:pharmacology*; D007371:Interferon-gamma / Q000096:biosynthesis; D007376:Interleukin-2 / Q000096:biosynthesis; D008213:Lymphocyte Activation / Q000187:drug effects*; D010835:Phytohemagglutinins / Q000494:pharmacology; D011518:Proto-Oncogene Proteins / Q000235:genetics; D016271:Proto-Oncogene Proteins c-myc; D012333:RNA, Messenger / Q000032:analysis; D015375:Receptors, Interleukin-2 / Q000032:analysis; D011990:Receptors, Transferrin / Q000032:analysis; D013601:T-Lymphocytes / Q000187:drug effects* / Q000276:immunology; D062367:ortho-Aminobenzoates / Q000494:pharmacology*
chemical_list: D007166:Immunosuppressive Agents; D007376:Interleukin-2; D010835:Phytohemagglutinins; D011518:Proto-Oncogene Proteins; D016271:Proto-Oncogene Proteins c-myc; D012333:RNA, Messenger; D015375:Receptors, Interleukin-2; D011990:Receptors, Transferrin; D062367:ortho-Aminobenzoates; D007371:Interferon-gamma; C015735:lobenzarit