title: Induction of growth alterations in factor-dependent hematopoietic progenitor cell lines by cocultivation with irradiated bone marrow stromal cell lines.
abstract: We studied the production of hemopoietins by x-irradiated plateau-phase cultures of cloned marrow stromal cell lines derived from C3H/HeJ marrow, termed D2XRII and clone 11. The production of CSF in agar overlay of control or 10,000 rad irradiated stromal cultures was quantitated by induction of colonies in: overlaid fresh marrow, IL-3-dependent cell line 32D cl 3, or GM-CSF/IL-3-dependent cell lines FDCP-1 or bg/bg cl 1. Conditioned media were tested for CSF by bioassay using fresh marrow cells, for M-CSF (CSF-1) by RIA, and for IL-3 and GM-CSF by microwell proliferation assay with 32D cl 3 and FDCP-1 cells, respectively. X-irradiation to doses that decreased CSF-1 to 40% of control levels (greater than 5,000 rad) resulted in a 30-fold increase in growth of FDCP-1 or bg/bg cl 1 cells in liquid co-culture or agar culture overlay with no detectable growth of 32D cl 3. The frequency of subculture of nonautocrine, factor independent (FI) variant clonal lines of FDCP-1 or bg/bg cl 1 cells was increased over 1000-fold by 15 weeks cocultivation with irradiated stromal cell cultures. FI subclonal lines formed tumors in syngeneic mice and contained no detectable poly A messenger RNA for GM-CSF or IL-3, and no elevation in c-myc, c-abl, c-src, or erb-B onc gene-specific messenger RNA compared to parent factor-dependent lines. These data indicate that x-irradiated plateau phase marrow stromal cells produce increased levels of cell contact-mediated biologically active hemopoietin(s) other than M-CSF, GM-CSF, or IL-3 and induce nonautocrine factor-independent malignant cell lines in vitro.
authors.forename: E
authors.initials: E
authors.lastname: Naparstek
authors.forename: J
authors.initials: J
authors.lastname: Pierce
authors.forename: D
authors.initials: D
authors.lastname: Metcalf
authors.forename: R
authors.initials: R
authors.lastname: Shadduck
authors.forename: J
authors.initials: J
authors.lastname: Ihle
authors.forename: A
authors.initials: A
authors.lastname: Leder
authors.forename: M A
authors.initials: MA
authors.lastname: Sakakeeny
authors.forename: K
authors.initials: K
authors.lastname: Wagner
authors.forename: J
authors.initials: J
authors.lastname: Falco
authors.forename: T J
authors.initials: TJ
authors.lastname: FitzGerald
mesh_terms: D000818:Animals; D001681:Biological Assay; D001853:Bone Marrow / Q000528:radiation effects*; D001854:Bone Marrow Cells; D002455:Cell Division; D002460:Cell Line; D002478:Cells, Cultured; D003114:Colony-Forming Units Assay; D003115:Colony-Stimulating Factors / Q000096:biosynthesis; D006098:Granulocytes / Q000166:cytology; D006412:Hematopoietic Stem Cells / Q000166:cytology*; D007377:Interleukin-3; D008222:Lymphokines / Q000032:analysis; D008264:Macrophages / Q000166:cytology; D051379:Mice; D008809:Mice, Inbred C3H; D008810:Mice, Inbred C57BL; D011061:Poly A / Q000032:analysis; D012333:RNA, Messenger / Q000032:analysis; D011863:Radioimmunoassay
chemical_list: D003115:Colony-Stimulating Factors; D007377:Interleukin-3; D008222:Lymphokines; D012333:RNA, Messenger; D011061:Poly A