title: Retinoic acid upregulates c-kit ligand production by murine keratinocyte in vitro and increases cutaneous mast cell in vivo.
abstract: Mouse-transformed epidermal cell line (Pam 212) generated the soluble mediators for promoting the growth of a mast cell line (MC9) in the presence of retinoic acid at a concentration of 10(-6)-10(-7) M. The effective molecule of MC9 cell growth promoting factor (MC9-GF) was non-dialyzable and eluted between the molecular weight of 45 K and 68 K on a TSK 2000 G column. Chromatofocusing analysis revealed that this factor had a pI range between 7.0 and 7.5. Anti-c-kit ligand antibody abrogated MC9-GF activity and RT-PCR analysis demonstrated that retinoic acid upregulates c-kit ligand mRNA expression by Pam cells. Several recombinant cytokines including IL1-alpha, IL-1 beta, IL-2, IL-3 or IL-4 did not promote MC9 cell growth at a concentration of 100 U/ml. The presence of anti-IL-1 alpha, -IL-1 beta, -IL-2, -IL-3 or -IL-4 antibodies did not abrogate the MC9-GF activity except for anti-c-kit ligand antibody.
authors.affiliation: Department of Dermatology, Tokyo Medical and Dental University School of Medicine, Japan.
authors.forename: I
authors.initials: I
authors.lastname: Katayama
authors.forename: K
authors.initials: K
authors.lastname: Otoyama
authors.forename: H
authors.initials: H
authors.lastname: Yokozeki
authors.forename: K
authors.initials: K
authors.lastname: Nishioka
mesh_terms: D000818:Animals; D001483:Base Sequence; D002460:Cell Line; D016207:Cytokines / Q000494:pharmacology; D004247:DNA / Q000235:genetics; D006133:Growth Substances / Q000096:biosynthesis; D006965:Hyperplasia; D066298:In Vitro Techniques; D015603:Keratinocytes / Q000187:drug effects* / Q000378:metabolism*; D008407:Mast Cells / Q000187:drug effects / Q000473:pathology; D051379:Mice; D008807:Mice, Inbred BALB C; D008969:Molecular Sequence Data; D016133:Polymerase Chain Reaction; D011518:Proto-Oncogene Proteins / Q000096:biosynthesis* / Q000235:genetics; D019009:Proto-Oncogene Proteins c-kit; D012333:RNA, Messenger / Q000235:genetics / Q000378:metabolism; D020794:Receptor Protein-Tyrosine Kinases / Q000096:biosynthesis* / Q000235:genetics; D016184:Receptors, Colony-Stimulating Factor / Q000096:biosynthesis* / Q000235:genetics; D012867:Skin / Q000187:drug effects / Q000473:pathology; D014212:Tretinoin / Q000494:pharmacology*; D015854:Up-Regulation / Q000187:drug effects
chemical_list: D016207:Cytokines; D006133:Growth Substances; D011518:Proto-Oncogene Proteins; D012333:RNA, Messenger; D016184:Receptors, Colony-Stimulating Factor; D014212:Tretinoin; D004247:DNA; D019009:Proto-Oncogene Proteins c-kit; D020794:Receptor Protein-Tyrosine Kinases