PMID- 8656058 OWN - NLM STAT- MEDLINE DCOM- 19960801 LR - 20190516 IS - 0741-5400 (Print) IS - 0741-5400 (Linking) VI - 59 IP - 5 DP - 1996 May TI - IFN-alpha-mediated suppression of low-affinity FC(epsilon) receptors on Peyer's patch lymphocytes and augmentation of soluble CD23: implications for IgE responses. PG - 725-7 AB - The ability of interleukin (IL)-6 or interferon-alpha (IFN-alpha) to regulate expression of low-affinity Fc(epsilon) receptor (CD23) and serum levels of CD23 was studied in benzylpenicilloyl-keyhole limpet hemocyanin-sensitized BALB/c mice at the peak of a hapten-specific immunoglobulin E (IgE) antibody-forming cell (AFC) response. These responses are analogous to those observed in human atopic disease. To induce peak IgE responses, mice were injected intraperitoneally with BPO-KLH (10 micrograms) in aluminum hydroxide gel (alum) on days 0, 21, and 42. On day 44, mice were injected subcutaneously with IL-6 (100-1000 U) or IFN-alpha (1000-10,000 U). On day 46, numbers of CD23+ lymphocytes in Peyer's patches (PP), mesenteric lymph nodes (MLN), and spleen and levels of soluble CD23 in serum were determined (flow microfluorimetry and enzyme-linked immunosorbent assay, confirmed by competition assay). Data are expressed as percent total cells or as optical density at 490 nm. IFN-alpha treatment strongly suppressed (up to 100%) numbers of CD23+ cells exclusively in PP (i.e., numbers of CD23+ cells in MLN and spleen were unchanged) whereas serum levels of soluble CD23 were dramatically increased (60%). IL-6 treatment had no effect on either numbers of CD23+ lymphocytes or on serum levels of soluble CD23. The data suggest that the mechanism(s) by which IFN-alpha, but not IL-6, regulates IgE responses involves suppression of CD23 expression on lymphocytes in PPs and supports a central role for these organs in regulation of IgE responses in vivo. FAU - Miller, H AU - Miller H AD - Department of Pathology, State University of New York Health Science Center at Brooklyn, 11203, USA. FAU - Bluth, M H AU - Bluth MH FAU - Chice, S M AU - Chice SM FAU - Durkin, H G AU - Durkin HG FAU - Auci, D L AU - Auci DL LA - eng PT - Journal Article PL - England TA - J Leukoc Biol JT - Journal of leukocyte biology JID - 8405628 RN - 0 (Interferon-alpha) RN - 0 (Interleukin-6) RN - 0 (Receptors, IgE) RN - 37341-29-0 (Immunoglobulin E) SB - IM MH - Animals MH - Immunoglobulin E/*biosynthesis MH - Interferon-alpha/*pharmacology MH - Interleukin-6/pharmacology MH - Mice MH - Mice, Inbred BALB C MH - Peyer's Patches/*immunology MH - Receptors, IgE/analysis/*drug effects EDAT- 1996/05/01 00:00 MHDA- 1996/05/01 00:01 CRDT- 1996/05/01 00:00 PHST- 1996/05/01 00:00 [pubmed] PHST- 1996/05/01 00:01 [medline] PHST- 1996/05/01 00:00 [entrez] AID - 10.1002/jlb.59.5.725 [doi] PST - ppublish SO - J Leukoc Biol. 1996 May;59(5):725-7. doi: 10.1002/jlb.59.5.725.