title: Effect of interleukin 10 on the hematopoietic progenitor cells from patients with aplastic anemia.
abstract: The overproduction of cytokines with inhibitory effects on hematopoiesis is considered to play a role in the pathogenesis of aplastic anemia. While interleukin 10 (IL-10) is a cytokine production inhibitory factor, the possibility of immunosuppressive therapy using IL-10 for aplastic anemia has not been explored. In this study, therefore, we examined the effect of IL-10 on progenitor cells obtained from seven patients with severe aplastic anemia. Our study indicated that IL-10 dramatically enhanced the erythroid colony formation in a dose-dependent manner in two of the seven cases examined. When we examined the concentration of cytokines in the culture supernatants of unstimulated bone marrow cells, the spontaneous production of interferon-gamma (IFN-gamma) was observed in one of these two cases, and this production was completely inhibited by addition of IL-10. These findings suggested that IL-10 enhanced the erythroid colony formation by inhibiting the pathological production of IFN-gamma in this case. This study provides an experimental support for the clinical application of IL-10 in some patients with aplastic anemia.
authors.affiliation: First Department of Internal Medicine, Faculty of Medicine, Kyushu University, Fukuoka, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Asano
authors.forename: S
authors.initials: S
authors.lastname: Shibata
authors.forename: S
authors.initials: S
authors.lastname: Kobayashi
authors.forename: S
authors.initials: S
authors.lastname: Okamura
authors.forename: Y
authors.initials: Y
authors.lastname: Niho
mesh_terms: D000328:Adult; D000368:Aged; D000741:Anemia, Aplastic / Q000188:drug therapy*; D004305:Dose-Response Relationship, Drug; D015672:Erythroid Precursor Cells / Q000187:drug effects; D005260:Female; D006412:Hematopoietic Stem Cells / Q000187:drug effects*; D006801:Humans; D016898:Interferon-alpha / Q000096:biosynthesis; D007371:Interferon-gamma / Q000096:biosynthesis; D016753:Interleukin-10 / Q000494:pharmacology*; D008297:Male; D008875:Middle Aged; D011994:Recombinant Proteins / Q000494:pharmacology
chemical_list: D016898:Interferon-alpha; D011994:Recombinant Proteins; D016753:Interleukin-10; D007371:Interferon-gamma