title: Regulation of hematopoietic growth factor production by genetically modified human bone marrow stromal cells expressing interleukin-1beta antisense RNA.
abstract: Interleukin-1 (IL-1) plays a major role in the regulation of bone marrow stromal cell function and hematopoiesis. It is known to induce secretion of the hematopoietic growth factors granulocyte colony-stimulating factor (G-CSF), granulocyte-macrophage CSF (GM-CSF), IL-6, and IL-8 as well as IL-1 itself in stromal cells. We investigated the role of IL-1beta-mediated growth factor production in the human stromal cell line L88/5. Using liposome-mediated DNA transfer, two stromal cell transfectants that constitutively express IL-1beta antisense (AS) RNA were generated. Expression of IL-1beta AS RNA and IL-1beta RNA was determined by RT-PCR. The stromal cell transfectants were strongly impaired in their endogenous IL-1beta production, and this effect was present even when strong IL-1beta inducers, such as IL-1alpha and tumor necrosis factor-alpha (TNF-alpha), were used. Reduced endogenous IL-1beta levels had no effect on the constitutive production of IL-6, IL-8, and GM-CSF measured by ELISA. In contrast to lipopolysaccharide (LPS) stimulation, IL-1alpha-mediated stimulation of GM-CSF production was significantly reduced in AS transfectants. TNF-alpha induced GM-CSF production was also reduced. IL-6 and IL-8 production was increased in transfectants, suggesting a negative regulatory role of IL-1beta in L88/5. This new approach using AS technology to specifically target constitutive RNA expression will allow further characterization of the bone marrow cytokine network in normal and malignant hematopoiesis.
authors.affiliation: III. Department of Medicine, Johannes-Gutenberg University Mainz, Mainz, Germany.
authors.forename: U F
authors.initials: UF
authors.lastname: Hartwig
authors.forename: U
authors.initials: U
authors.lastname: Keller
authors.forename: C
authors.initials: C
authors.lastname: Huber
authors.forename: C
authors.initials: C
authors.lastname: Peschel
mesh_terms: D001483:Base Sequence; D001854:Bone Marrow Cells / Q000166:cytology*; D002460:Cell Line; D016178:Granulocyte-Macrophage Colony-Stimulating Factor / Q000096:biosynthesis*; D006801:Humans; D007375:Interleukin-1 / Q000096:biosynthesis* / Q000235:genetics* / Q000494:pharmacology / Q000502:physiology; D015850:Interleukin-6 / Q000096:biosynthesis; D016209:Interleukin-8 / Q000096:biosynthesis; D008070:Lipopolysaccharides / Q000494:pharmacology; D016372:RNA, Antisense / Q000235:genetics*; D012333:RNA, Messenger / Q000096:biosynthesis; D017154:Stromal Cells / Q000187:drug effects / Q000378:metabolism*; D014162:Transfection; D014409:Tumor Necrosis Factor-alpha / Q000494:pharmacology
chemical_list: D007375:Interleukin-1; D015850:Interleukin-6; D016209:Interleukin-8; D008070:Lipopolysaccharides; D016372:RNA, Antisense; D012333:RNA, Messenger; D014409:Tumor Necrosis Factor-alpha; D016178:Granulocyte-Macrophage Colony-Stimulating Factor