Large-Scale Culture and Selective Maturation of Human Langerhans Cells from Granulocyte Colony-Stimulating Factor-Mobilized CD34+ Progenitors

• Published in: The Journal of immunology (1950) Vol. 164; no. 7; pp. 3600 - 3607
• Main Authors: Gatti, Evelina, Velleca, Mark A, Biedermann, Barbara C, Ma, Weilie, Unternaehrer, Juli, Ebersold, Melanie W, Medzhitov, Ruslan, Pober, Jordan S, Mellman, Ira
• Format: Journal Article
• Language: English
• Published: United States Am Assoc Immnol 01.04.2000
• Subjects: Adult; Antigens, CD1 - biosynthesis; Antigens, CD34 - biosynthesis; Antigens, Differentiation, T-Lymphocyte; Antigens, Neoplasm; CD40 Ligand; Cell Count; Cell Culture Techniques - methods; Cell Differentiation - drug effects; Cell Differentiation - immunology; Dendritic Cells - cytology; Dendritic Cells - immunology; Dendritic Cells - metabolism; Granulocyte Colony-Stimulating Factor - physiology; Hematopoietic Stem Cell Transplantation; Humans; Immunophenotyping; Langerhans Cells - cytology; Langerhans Cells - immunology; Langerhans Cells - metabolism; Leukapheresis; Ligands; Lipopolysaccharides - pharmacology; Membrane Glycoproteins - biosynthesis; Membrane Glycoproteins - pharmacology; Stem Cells - cytology; Stem Cells - immunology; Stem Cells - metabolism; Tumor Necrosis Factor-alpha - pharmacology
• ISSN: 0022-1767; 1550-6606
• DOI: 10.4049/jimmunol.164.7.3600

Dendritic cells (DCs) play a critical role as APCs in the induction of the primary immune response. Their capacity for Ag processing and presentation is tightly regulated, controlled by a terminal developmental sequence accompanied by striking changes in morphology, organization, and function. The maturation process, which converts DCs from cells adapted for Ag accumulation to cells adapted for T cell stimulation, remains poorly understood due in part to difficulties in the culture and manipulation of DCs of defined lineages. To address these issues, we have devised conditions for the culture of a single DC type, Langerhans cells (LCs), using CD34+ cells from G-CSF-mobilized patients. Homogenous populations of LCs, replete with abundant immunocytochemically demonstrable Birbeck granules, could be stably maintained as immature DCs for long periods in culture. Unlike other human DC preparations, the LCs remained fully differentiated after cytokine removal. Following exposure to TNF-alpha, LPS, or CD40 ligand, the LCs could be synchronously induced to mature. Depending on the agent used, distinct types of LCs emerged differing in their capacity for T cell stimulation, IL-12 production, intracellular localization of MHC products, and overall morphology. Most interestingly, the expression of different sets of Toll family receptors is induced or down-regulated according to the maturation stimulus provided. These results strongly suggest that different proinflammatory stimuli might drive distinct developmental events.