Histochemistry and Cell Biology

, Volume 147, Issue 2, pp 223–237

C-type lectins: their network and roles in pathogen recognition and immunity

  • Sabine Mayer
  • Marie-Kristin Raulf
  • Bernd Lepenies
Review

DOI: 10.1007/s00418-016-1523-7

Cite this article as:
Mayer, S., Raulf, MK. & Lepenies, B. Histochem Cell Biol (2017) 147: 223. doi:10.1007/s00418-016-1523-7

Abstract

C-type lectins (CTLs) represent the most complex family of animal/human lectins that comprises 17 different groups. During evolution, CTLs have developed by diversification to cover a broad range of glycan ligands. However, ligand binding by CTLs is not necessarily restricted to glycans as some CTLs also bind to proteins, lipids, inorganic molecules, or ice crystals. CTLs share a common fold that harbors a Ca2+ for contact to the sugar and about 18 invariant residues in a phylogenetically conserved pattern. In vertebrates, CTLs have numerous functions, including serum glycoprotein homeostasis, pathogen sensing, and the initiation of immune responses. Myeloid CTLs in innate immunity are mainly expressed by antigen-presenting cells and play a prominent role in the recognition of a variety of pathogens such as fungi, bacteria, viruses, and parasites. However, myeloid CTLs such as the macrophage inducible CTL (Mincle) or Clec-9a may also bind to self-antigens and thus contribute to immune homeostasis. While some CTLs induce pro-inflammatory responses and thereby lead to activation of adaptive immune responses, other CTLs act as inhibitory receptors and dampen cellular functions. Since CTLs are key players in pathogen recognition and innate immunity, targeting CTLs may be a promising strategy for cell-specific delivery of drugs or vaccine antigens and to modulate immune responses.

Keywords

Antigen-presenting cell Carbohydrates C-type lectins Innate immunity ITAM ITIM Targeting 

Funding information

Funder NameGrant NumberFunding Note
Niedersachsen-Research Network on Neuroinfectiology (N-RENNT)

    Copyright information

    © Springer-Verlag Berlin Heidelberg 2016

    Authors and Affiliations

    • Sabine Mayer
      • 1
    • Marie-Kristin Raulf
      • 1
      • 2
    • Bernd Lepenies
      • 1
    1. 1.Immunology Unit and Research Center for Emerging Infections and ZoonosesUniversity of Veterinary MedicineHannoverGermany
    2. 2.Institute for Parasitology, Center for Infection MedicineUniversity of Veterinary MedicineHannoverGermany

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