DC-SIGN and SRCL bind glycans of carcinoembryonic antigen (CEA) and CEA-related cell adhesion molecule 1 (CEACAM1): recombinant human glycan-binding receptors as analytical tools.
Members of the family of carcinoembryonic antigen (CEA)-related cell adhesion molecules (CEACAMs) belonging to the immunoglobulin (Ig) superfamily are expressed in a variety of normal and malignant human tissues. As components of the cell membrane, these glycoproteins can make contact with adjacent cells. CEACAM1 and CEACAM5 (CEA) express Lewis(x) (Le(x)) structures. As shown by mass spectrometry in conjunction with enzymatic digestion, CEACAM1 contains at least seven Le(x) residues. Fucosyltransferase IX is the main fucosyltransferase responsible for attachment of terminal fucose, the key feature of the Le(x) structure, to CEA and CEACAM1. The Le(x) residues of both, CEACAM1 and CEA, interact with the human Le(x)-binding glycan receptors DC-SIGN and SRCL. Since subpopulations of human macrophages express DC-SIGN or SRCL, Le(x)-carrying CEACAMs may modulate the immune response in normal tissues such as the human placenta or in malignant tumours, for example in colorectal, pancreatic or lung carcinomas.
Samsen
Alexandra
A
Institute of Clinical Chemistry, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, D-20251 Hamburg, Germany.
Bogoevska
Valentina
V
Klampe
Birgit
B
Bamberger
Ana-Maria
AM
Lucka
Lothar
L
Horst
Andrea K
AK
Nollau
Peter
P
Wagener
Christoph
C
D015703:Antigens, CD / Q000378:metabolism*; D002272:Carcinoembryonic Antigen / Q000378:metabolism*; D015815:Cell Adhesion Molecules / Q000378:metabolism*; D002460:Cell Line; D037222:Collectins / Q000378:metabolism*; D015179:Colorectal Neoplasms / Q000378:metabolism; D005260:Female; D005643:Fucose / Q000378:metabolism; D005647:Fucosyltransferases / Q000378:metabolism; D006801:Humans; D007413:Intestinal Mucosa / Q000378:metabolism; D037181:Lectins, C-Type / Q000378:metabolism*; D016256:Lewis X Antigen / Q000378:metabolism; D008545:Melanoma / Q000378:metabolism; D010920:Placenta / Q000378:metabolism; D011134:Polysaccharides / Q000378:metabolism*; D011247:Pregnancy; D011485:Protein Binding; D011956:Receptors, Cell Surface / Q000378:metabolism*; D051116:Receptors, Scavenger / Q000378:metabolism*; D011994:Recombinant Proteins / Q000378:metabolism*; D012878:Skin Neoplasms / Q000378:metabolism; D014020:Tissue Extracts; D000099215:DC-Specific ICAM-3 Grabbing Nonintegrin
D015703:Antigens, CD; D002272:Carcinoembryonic Antigen; D015815:Cell Adhesion Molecules; D037222:Collectins; D005643:Fucose; D005647:Fucosyltransferases; D037181:Lectins, C-Type; D016256:Lewis X Antigen; D011134:Polysaccharides; D011956:Receptors, Cell Surface; D051116:Receptors, Scavenger; D011994:Recombinant Proteins; D014020:Tissue Extracts; D000099215:DC-Specific ICAM-3 Grabbing Nonintegrin; C069847:CD66 antigens; C422442:COLEC12 protein, human; C519500:FUT9 protein, human