The role of APRIL and BAFF in lymphocyte activation
β Scribed by Pascal Schneider
- Publisher
- Elsevier Science
- Year
- 2005
- Tongue
- English
- Weight
- 217 KB
- Volume
- 17
- Category
- Article
- ISSN
- 0952-7915
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β¦ Synopsis
The TNF family ligands BAFF (also called BLyS) and APRIL regulate lymphocyte survival and activation. BAFF binds to three receptors, BAFF-R, TACI and BCMA, whereas APRIL interacts with TACI, BCMA and proteoglycans. The contribution of BAFF and APRIL to B-cell and plasma-cell survival, CD154 (CD40L)-independent antibody isotype switching, germinal center maintenance, T-dependent and T-independent antibody responses, and T cell co-stimulation are relatively well understood. Constitutive BAFF produced by stromal cells determines the size of the peripheral B cell pool, whereas inducible BAFF produced by myeloid and other cells supports local survival of B lymphocytes and can be associated with development of autoimmunity when deregulated.
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## Abstract The transmembrane electrical potential has been measured across human peripheral blood lymphocytes under culture conditions using equilibrium distributions of the lipophilic cation ^3^Hβtetraphenylphosphonium (TPP). The TPP equilibrates to a steadyβstate level that gives calculated volt
B-cell activating factor (BAFF) and a proliferation-inducing ligand (APRIL) are involved in normal B cell survival and differentiation. We analyzed BAFF and APRIL plasma levels in patients with B-cell chronic lymphocytic leukemia (B-CLL). We also tested intracellular BAFF and APRIL expression in B-C