We demonstrate that the a. chain of human C4b binding protein (C4BP) binds directly to CD40 on human B cells at a site that differs from that used by CD40 ligand. C4BP induces proliferation, upregulation of CD54 and CD86 expression, and IL4-dependent IgE isotype switching in normal B cells but not in B cells from patients with CD40 or IKKgamma/NEMO deficiencies. Furthermore, C4BP colocalized with B cells in the germinal centers of human tonsils. These observations suggest that C4BP is an activating ligand for CD40 and establish a novel interface between complement and B cell activation.

Brodeur, S.r., Angelini, F., Bacharier, L.b., Blom, A.m., Mizoguchi, E., Fujiwara, H., et al. (2003). C4b-binding protein (C4BP) activates B cells through the CD40 receptor. IMMUNITY, 18(6), 837-848 [10.1016/S1074-7613(03)00149-3].

C4b-binding protein (C4BP) activates B cells through the CD40 receptor

ANGELINI, FEDERICA;
2003-06-01

Abstract

We demonstrate that the a. chain of human C4b binding protein (C4BP) binds directly to CD40 on human B cells at a site that differs from that used by CD40 ligand. C4BP induces proliferation, upregulation of CD54 and CD86 expression, and IL4-dependent IgE isotype switching in normal B cells but not in B cells from patients with CD40 or IKKgamma/NEMO deficiencies. Furthermore, C4BP colocalized with B cells in the germinal centers of human tonsils. These observations suggest that C4BP is an activating ligand for CD40 and establish a novel interface between complement and B cell activation.
giu-2003
Pubblicato
Rilevanza internazionale
Articolo
Sì, ma tipo non specificato
Settore MED/38 - PEDIATRIA GENERALE E SPECIALISTICA
English
Con Impact Factor ISI
binding protein; CD40 ligand; CD86 antigen; complement component C4b binding protein; I kappa B kinase; I kappa B kinase gamma; immunoglobulin E; intercellular adhesion molecule 1; interleukin 4; protein; unclassified drug; alpha chain; antigen binding; article; B lymphocyte activation; binding site; cellular distribution; controlled study; human; human cell; human tissue; lymphocyte proliferation; priority journal; protein expression; protein function; protein localization; protein protein interaction; tonsil; upregulation; Antigens, CD; Antigens, CD40; Antigens, Differentiation; B-Lymphocytes; Carrier Proteins; Cell Adhesion Molecules; Cell Division; Complement Inactivator Proteins; Glycoproteins; Humans; Immunoglobulin E; Intercellular Adhesion Molecule-1; Interleukin-4; NF-kappa B; p38 Mitogen-Activated Protein Kinases; Tonsil; Up-Regulation
Brodeur, S.r., Angelini, F., Bacharier, L.b., Blom, A.m., Mizoguchi, E., Fujiwara, H., et al. (2003). C4b-binding protein (C4BP) activates B cells through the CD40 receptor. IMMUNITY, 18(6), 837-848 [10.1016/S1074-7613(03)00149-3].
Brodeur, Sr; Angelini, F; Bacharier, Lb; Blom, Am; Mizoguchi, E; Fujiwara, H; Plebani, A; Notarangelo, Ld; Dahlback, B; Tsitsikov, E; Geha, Rs
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/57263
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