Soluble human lymphocyte sugar binding proteins with immunosuppressive activity.

Abstract : Suppression of the immune response, which involves suppressor factors released from specialized T cells, is inhibited by alpha-L-rhamnose. In this paper, we show the presence of rhamnose-specific receptors on a human CD8+ T cell-rich population and describe a novel method to isolate cells which express a given sugar-binding protein on their surface. We describe the isolation of alpha-L-rhamnose-specific molecules (rhamnose-binding fractions: RBF) from a water-soluble extract from lymphocytes, their purification by affinity chromatography on immobilized neoglycoproteins containing rhamnose residues. RBF kept their ability to bind rhamnose, as shown by the binding of fluorescein-labeled RBF to rhamnosylated BSA-substituted beads. RBF efficiently suppresses DNA synthesis of mitogen-stimulated human lymphocytes as well as B cell immunoglobulin production. Therefore, these rhamnose-binding molecules appear to be antigen-independent suppressor factors.
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Submitted on : Tuesday, April 30, 2019 - 9:05:29 AM
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  • HAL Id : hal-02114973, version 1
  • PUBMED : 2071171



Catherine Grillon, M. Monsigny, C. Kieda. Soluble human lymphocyte sugar binding proteins with immunosuppressive activity.. Immunology Letters, Elsevier, 1991, 28 (1), pp.47-55. ⟨hal-02114973⟩



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