TY - JOUR
T1 - Epstein-Barr virus BCRF1 gene product (viral interleukin 10) inhibits superoxide anion production by human monocytes
AU - Niiro, H.
AU - Otsuka, T.
AU - Abe, M.
AU - Satoh, H.
AU - Ogo, T.
AU - Nakano, T.
AU - Furukawa, Y.
AU - Niho, Y.
PY - 1992/1/1
Y1 - 1992/1/1
N2 - Due to its similar biological activities to interleukin 10 (IL-10), Epstein-Barr virus (EBV) BCRF1 gene product (viral IL-10: vIL-10) has recently been recognized as an analogue of authentic IL-10. Preincubation of human monocytes with vIL-10, like human IL-10, induced smaller amounts of interferon-γ (IFN-γ) mRNA in activated human peripheral blood mononuclear cells (PBMNCs) than nonpreincubation, indicating that vIL-10 acts principally on monocytes. Since the activation of monocytes and their generation of oxidative products are regulated by various cytokines, we examined the effects of vIL-10 on superoxide anion (O2-) production by human PBMNCs and monocytes. Not only PBMNCs but also monocytes preincubated with vIL-10 showed a smaller production of O2-. Inhibition was achieved in a dose-dependent fashion and increased gradually after incubation with vIL-10. Additions of IFN-γ, macrophage colony-stimulating factor (M-CSF) or granulocyte- macrophage colony-stimulating factor (GM-CSF), which prime monocyte activation and induce O2- production, were also affected by the reciprocal effect of vIL-10. Thus, vIL-10 production by EBV-infected cells may be involved in the development of EBV-related disorders.
AB - Due to its similar biological activities to interleukin 10 (IL-10), Epstein-Barr virus (EBV) BCRF1 gene product (viral IL-10: vIL-10) has recently been recognized as an analogue of authentic IL-10. Preincubation of human monocytes with vIL-10, like human IL-10, induced smaller amounts of interferon-γ (IFN-γ) mRNA in activated human peripheral blood mononuclear cells (PBMNCs) than nonpreincubation, indicating that vIL-10 acts principally on monocytes. Since the activation of monocytes and their generation of oxidative products are regulated by various cytokines, we examined the effects of vIL-10 on superoxide anion (O2-) production by human PBMNCs and monocytes. Not only PBMNCs but also monocytes preincubated with vIL-10 showed a smaller production of O2-. Inhibition was achieved in a dose-dependent fashion and increased gradually after incubation with vIL-10. Additions of IFN-γ, macrophage colony-stimulating factor (M-CSF) or granulocyte- macrophage colony-stimulating factor (GM-CSF), which prime monocyte activation and induce O2- production, were also affected by the reciprocal effect of vIL-10. Thus, vIL-10 production by EBV-infected cells may be involved in the development of EBV-related disorders.
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M3 - Article
C2 - 1334711
AN - SCOPUS:0026658733
SN - 1079-9907
VL - 11
SP - 209
EP - 214
JO - Journal of Interferon and Cytokine Research
JF - Journal of Interferon and Cytokine Research
IS - 5
ER -