SBF

[suppressive B-cell factor] This biochemically uncharacterized factor of approximately 34 kDa is produced by B-lymphocytes expressing Fc receptors for IgG, stimulated with IgG immune complexes. It is produced also by the hybridoma TS4.44, established by fusion of B-cells with receptors for the Fc portion of IgG and thymidine kinase defective fibroblasts, 3T3-4E cells (Suzuki et al, 1983, 1985).

SBF suppresses responses of B-cells in vivo and in vitro by inhibiting their proliferation. SBF acts on the early step of B-cell activation and inhibits G0-G1 cell cycle transition and probably also the expression of functional IL4 ... ... ... ...
 
... CONTINUE READING at cells-talk.com, COPE's new home with 61 100+ entries, 141 552 cited references and >2,5 million internal hyperlinks. This most comprehensive knowledge base provides extensive in-context information covering nomenclature, terminology, and highlighting concepts, strategies & complexities of cellular communication processes. COPE's fully integrated subdictionaries include Dictionary of Angiogenesis • Dictionary of Antimicrobial & host defense peptides • Dictionary of Apoptosis and cell death • Dictionary of CD antigens • Dictionary of Chemokines • Dictionary of Cryptides • Dictionary of Cytokines & Growth factors • Dictionary of Eukaryotic cell types & expression profiles • Dictionary of Hematopoiesis • Dictionary of Hormones • Dictionary of Inflamation & inflammatory mediators • Dictionary of Innate Immunity • Dictionary of Metalloproteinases • Dictionary of Moonlighting proteins & cryptides • Dictionary of Neuropeptides • Dictionary of Pathogenicity & Virulence Factors • Dictionary of Pattern recognition receptors • Dictionary of Protein domains • Dictionary of Regulatory peptide factors • Dictionary of Viroceptors • Dictionary of Virokines • Dictionary of Stem cells and more.
 
An important note about your privacy: A search engine may have brought you here. If the provided URL differs in any way from "www.copewithcytokines.org/cope.cgi?key=search term", 3rd parties may record your activities on COPE. Bypass snoopers by doing this: Go directly to cells-talk.com or go to copewithcytokines.org in a new browser tab and from there explore whether COPE contains the terms that interest you. The private bioinformatics initiative COPE at cells-talk.com never shares your search histories or user databank entry with 3rd parties.

Copyright © 1997-2025. All rights reserved by Dr H Ibelgaufts, the sole author/owner/maintainer of the COPE Knowledge Base. EXPLICITLY: COPE's contents are strictly for the personal use of subscribers. They aren't in the public-domain and may not be reproduced elsewhere or transmitted in any form!

Entry last modified: January 2002