Involvement of NAK-1, the human nur77 homologue, in surface IgM-mediated apoptosis in Burkitt lymphoma cell line BL41

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Item Type:	Article
Title:	Involvement of NAK-1, the human nur77 homologue, in surface IgM-mediated apoptosis in Burkitt lymphoma cell line BL41
Creators Name:	Mapara, M.Y., Weinmann, P., Bommert, K., Daniel, P.T., Bargou, R.C. and Doerken, B.
Abstract:	The induction of apoptosis via surface IgM (sIgM) in immature B cells requires de novo transcription. To investigate the regulation of activation-induced cell death (AICD) in B cells we used a cell line model consisting of an Epstein-Barr virus-negative Burkitt lymphoma cell line (BL41), which is highly sensitive, and a subclone which is resistant to sIgM-mediated apoptosis (BL41/B5). Resistance in this cell line was not due to down-regulation of sIgM or functional impairment in signal transduction of the surface Ig complex. The zinc finger transcription factor nur77 has been implicated to play an important role in CD3-mediated apoptosis in murine T cells. We were able to demonstrate that surface IgM ligation and subsequent apoptosis in BL41 cells is associated with a concomitant induction of NAK-1, the human nur77 homologue. Induction of NAK-1 mRNA and DNA binding activity in the nucleus could be readily observed by means of Northern blot and electrophoretic mobility shift assay, respectively. In contrast, the resistant clone BL41/B5 did not show any NAK-1 expression upon stimulation. This suggests a role for NAK-1 in sIgM-mediated apoptosis of immature B cells.
Keywords:	Apoptosis, BL41, nur77, NAK-1, Immediate-Early Genes
Source:	European Journal of Immunology
ISSN:	0014-2980
Publisher:	Wiley
Volume:	25
Number:	9
Page Range:	2506-2510
Date:	September 1995
Official Publication:	https://doi.org/10.1002/eji.1830250915
PubMed:	View item in PubMed

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