Thiol-sensitive mast cell lines derived from mouse bone marrow respond to a mast cell growth-enhancing activity different from both IL-3 and IL-4.
A series of permanent IL-3-dependent cell lines have been established from normal BALB/c or C3H bone marrow using alpha-thioglycerol-supplemented culture medium and PWM-stimulated spleen cell-conditioned medium as a source of IL-3. The cell lines and derivatives cloned in agar resembled "mucosal type" mast cells with respect to phenotypic and functional properties. In this report we demonstrate that in vitro growth of these mast cell lines was not only dependent on IL-3 and synergistically enhanced by IL-4, but in addition regulated by alpha-thioglycerol which could be replaced by 2-ME or cysteamine. We show that these thiol-sensitive mast cell lines respond to a mast cell growth enhancing activity (MEA) present in spleen cell-conditioned medium and acting in concert with IL-3. Partially purified MEA was not able to stimulate the growth of IL-3-dependent 32Dcl.23 cells, IL-2-dependent CTLL-2 cells or the mouse T cell line F4/4K.6 (L3T4+) adapted to grow in purified IL-4. Moreover, 11B11 hybridoma-derived anti-IL-4 mAb specifically neutralizing mouse Il-4 were unable to abolish the bioactivity of MEA. PWM, CSF-1, GM-CSF, IL-1, IL-2, IL-5, IL-6, IL-7, IFN-gamma, TGF-alpha, TNF-alpha, NGF, or EPO did not substitute for MEA in our standard proliferation assay.
Hültner
L
L
Gesellschaft für Strahlen- und Umweltforschung, Institut für Experimentelle Hämatologie, München, FRG.
Moeller
J
J
Schmitt
E
E
Jäger
G
G
Reisbach
G
G
Ring
J
J
Dörmer
P
P
D000818:Animals; D001854:Bone Marrow Cells; D002455:Cell Division / Q000187:drug effects; D002460:Cell Line; D003470:Culture Media / Q000032:analysis; D005260:Female; D007377:Interleukin-3 / Q000032:analysis / Q000494:pharmacology / Q000502:physiology*; D015847:Interleukin-4; D007378:Interleukins / Q000494:pharmacology*; D008297:Male; D008407:Mast Cells / Q000032:analysis / Q000145:classification / Q000502:physiology*; D051379:Mice; D008807:Mice, Inbred BALB C; D008809:Mice, Inbred C3H; D008810:Mice, Inbred C57BL; D010641:Phenotype; D013438:Sulfhydryl Compounds
D003470:Culture Media; D007377:Interleukin-3; D007378:Interleukins; D013438:Sulfhydryl Compounds; D015847:Interleukin-4