title: Secretion of proinflammatory cytokines by normal human melanocytes in response to lipopolysaccharide.
abstract: A large body of evidence suggests that epidermal melanocytes are an integral part of the skin immune system and can be considered immunocompetent cells. Recently, it has been reported that human melanocytes constitutively express Toll-like receptors and may be involved in the induction of several inflammatory cytokines. In the study the secretion of IL-1β, IL-6 and TNF-α by cultured normal melanocytes was investigated after stimulation with lipopolysaccharide. LPS increased the secretion of IL-1β in a dose-dependent manner. IL-1β stimulated release of IL-6 and TNF-α by melanocytes, whereas LPS activated production of TNF-α, but not of IL-6. These observations indicate that LPS can participate in the regulation of cytokine activity in normal human melanocytes and suggest that cytokines released by melanocytes could affect melanocytes themselves or/and other cells of the epidermis.
authors: Department of Instrumental Analysis, Medical University of Silesia, Sosnowiec, Poland. tami@sum.edu.pl
authors: Irena
authors: I
authors: Tam
authors: Krystyna
authors: K
authors: Stępień
mesh_terms: D000255:Adenosine Triphosphate / Q000378:metabolism; D002470:Cell Survival; D003470:Culture Media / Q000378:metabolism; D004306:Dose-Response Relationship, Immunologic; D004797:Enzyme-Linked Immunosorbent Assay; D004817:Epidermis / Q000187:drug effects / Q000276:immunology; D006801:Humans; D053583:Interleukin-1beta / Q000378:metabolism*; D015850:Interleukin-6 / Q000378:metabolism*; D007770:L-Lactate Dehydrogenase / Q000378:metabolism; D008070:Lipopolysaccharides / Q000494:pharmacology*; D008544:Melanocytes / Q000187:drug effects / Q000276:immunology*; D061251:Primary Cell Culture; D013997:Time Factors; D014409:Tumor Necrosis Factor-alpha / Q000378:metabolism*
chemical_list: D003470:Culture Media; C508585:IL1B protein, human; C508600:IL6 protein, human; D053583:Interleukin-1beta; D015850:Interleukin-6; D008070:Lipopolysaccharides; D014409:Tumor Necrosis Factor-alpha; D000255:Adenosine Triphosphate; D007770:L-Lactate Dehydrogenase