کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5916628 | 1163753 | 2015 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
ERK1/2 has an essential role in B cell receptor- and CD40-induced signaling in an in vitro model of germinal center B cell selection
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
بیوشیمی، ژنتیک و زیست شناسی مولکولی
زیست شناسی مولکولی
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چکیده انگلیسی
Germinal center (GC) B cells undergo apoptosis after B cell receptor (BCR) ligation, unless they receive CD40-mediated survival signal from helper T cells. In the present study, we used a human follicular lymphoma cell line HF1A3, as an in vitro model to study the selection process in germinal centers. We show here that BCR ligation led to immediate ERK1/2 activation and phosphorylations of its downstream targets, Bim EL/L and Bcl-2 (at Ser70) which resulted in short-term survival. On the other hand, during the late phase of BCR signaling, ERK1/2 phosphorylation was inhibited which resulted in apoptosis. In addition, CD40 signaling led to sustained ERK1/2 activation and up-regulation of Bcl-xL in BCR-primed HF1A3 GC B cells. In conclusion, MEK-ERK pathway and Bcl-2 family proteins are crucial players in BCR-mediated survival/apoptosis and CD40-mediated survival.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Molecular Immunology - Volume 67, Issue 2, Part B, October 2015, Pages 240-247
Journal: Molecular Immunology - Volume 67, Issue 2, Part B, October 2015, Pages 240-247
نویسندگان
Jemal Adem, Aleksi Hämäläinen, Antti Ropponen, Jonna Eeva, Mine Eray, Ulla Nuutinen, Jukka Pelkonen,