Antigen Processing Capacity of Dendritic Cells from Mice of Different MHC Backgrounds: Down-Regulation upon Culture and Evidence for Heterogeneity of Dendritic Cell Populations

  • Franz Koch
  • Bettina Trockenbacher
  • Gerold Schuler
  • Nikolaus Romani
Part of the Advances in Experimental Medicine and Biology book series (AEMB, volume 378)

Abstract

Dendritic cells (DC) are highly specialized to initiate primary immune responses.1 They exhibit the necessary properties for this task at different stages of their lifespan. In an immature state, while resident in the tissues, they are very efficient in processing native protein antigens and thus generating MHC class II/peptide ligands for the antigen-specific T cell receptors. After undergoing a maturation process they acquire the adhesion molecules and costimulatory molecules necessary for the powerful stimulation of resting T cells2–4 and they greatly reduce the capacity to process native proteins.5–9 At the cellular level the decrease of processing activity in maturing DC was correlated with the disappearance of acidic, endosomal organelles and with the loss of invariant chain expression (reviewed in1). Furthermore it was shown that biosynthesis of MHC class II and invariant chain molecules is massive at a time when processing activity is high (i.e. in freshly isolated Langerhans cells); upon culture biosynthesis of both molecules is largely shut down (reviewed in1). These cellular and molecular observations may explain the down-regulation of processing.

Keywords

Lysozyme Dermatol 

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Copyright information

© Springer Science+Business Media New York 1995

Authors and Affiliations

  • Franz Koch
    • 1
  • Bettina Trockenbacher
    • 1
  • Gerold Schuler
    • 1
  • Nikolaus Romani
    • 1
  1. 1.Department of DermatologyUniversity of InnsbruckInnsbruckAustria

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