title: The C3b/C4b receptor (CR1, CD35) on erythrocytes: methods for study of the polymorphisms.
abstract: This report is devoted to methodologies used in analyzing the C3b/C4b receptor (CR1, CD35) on erythrocytes (E), its soluble form, the CRI structural or allotype polymorphism, and CR1 density polymorphism. In primates E CR1 serves as the main system for processing and clearance of complement opsonized immune complexes (IC). CR1 copy numbers decrease with aging of E in normal individuals. Erythrocyte CR1 is also decreased in pathological conditions such as systemic lupus erythematosus (SLE), HIV infection, certain hemolytic anemias, and many other conditions featuring immune complexes. Consequently, CRI on E has an important physiological role in immune complex handling and has interesting alterations in disease.
authors.affiliation: Laboratoire d'Immunologie, Pôle Biomolécules, IFR 53, Université de Reims Champagne Ardennes, URCA, France. jacques.cohen@univ-reims.fr
authors.forename: J H
authors.initials: JH
authors.lastname: Cohen
authors.forename: J P
authors.initials: JP
authors.lastname: Atkinson
authors.forename: L B
authors.initials: LB
authors.lastname: Klickstein
authors.forename: S
authors.initials: S
authors.lastname: Oudin
authors.forename: V B
authors.initials: VB
authors.lastname: Subramanian
authors.forename: J M
authors.initials: JM
authors.lastname: Moulds
mesh_terms: D000818:Animals; D000936:Antigen-Antibody Complex / Q000378:metabolism; D001789:Blood Group Antigens / Q000235:genetics / Q000276:immunology; D015139:Blotting, Southern; D002874:Chromosome Mapping; D003167:Complement Activation / Q000235:genetics; D004247:DNA / Q000235:genetics; D004912:Erythrocytes / Q000276:immunology*; D005821:Genetic Techniques; D006801:Humans; D007091:Image Processing, Computer-Assisted; D007158:Immunologic Techniques; D005810:Multigene Family; D016133:Polymerase Chain Reaction; D011110:Polymorphism, Genetic; D012150:Polymorphism, Restriction Fragment Length; D017463:Receptors, Complement 3b / Q000032:analysis / Q000235:genetics* / Q000378:metabolism; D012995:Solubility
chemical_list: D000936:Antigen-Antibody Complex; D001789:Blood Group Antigens; D017463:Receptors, Complement 3b; D004247:DNA