Neurology International 2013; volume 5:e4 Expression of B-cell activating the NF-kB-pathway.4 BAFF is usually expressed by macrophages, monocytes, and T-, but not B- Correspondence: Tobias Birnbaum, Department factor, a proliferating inducing cells. It binds to three receptors: BAFF receptor of Neurology, Ludwig-Maximilians University, ligand and its receptors (BAFF-R), B-cell maturation antigen (BCMA) Marchioninistr. 15, 81377 Munich, Germany. in primary central nervous and transmembrane activator and calcium Tel. +49.8970950 - Fax: +49.8951603677. system lymphoma modulator cyclophilin ligand interactor (TACI). E-mail:
[email protected] APRIL binds to BCMA and TACI. The BAFF/APRIL system might play an important Key words: PCNSL; BAFF; APRIL; TACI; BCMA 1 1 Tobias Birnbaum, Sigrid Langer, role in the pathogenesis of systemic B-cell 2 1 Conflict of interests: the authors report no poten- Sigrun Roeber, Louisa von Baumgarten, 4-7 malignancies. However, this signaling path- tial conflict of interests. Andreas Straube1 way has not been systematically evaluated in Departments of 1Neurology and PCNSL to date. Aim of this study was to assess Contributions: TB, SL, AS, were responsible for 2Neuropathology, Ludwig-Maximilians the expression profile of the BAFF/APRIL sys- the conception of the study, analysis and inter- University, Munich, Germany tem in PCNSL. pretation of data; TB, wrote the manuscript; LvB, SL, SR, were responsible for immunohistochemi- cal staining, acquisition of photographs and preparing figures. Abstract Materials and Methods Received for publication: 14 September 2012. Revision received: 12 February 2013. B-cell activating factor belonging to the Formalin-fixed, paraffin-embedded tissue Accepted for publication: 25 February 2013.