Lymphocyte-specific compensation for XLF/cernunnos end-joining functions in V(D)J recombination.
Lymphocyte-specific compensation for XLF/cernunnos end-joining functions in V(D)J recombination.
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DOI:
10.1016/j.molcel.2008.07.017
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发表时间:
2008-09-05
期刊:
影响因子:
16
通讯作者:
Zha, Shan
中科院分区:
文献类型:
--
作者:
Li, Gang;Alt, Frederick W.;Cheng, Hwei-Ling;Brush, James W.;Goff, Peter H.;Murphy, Mike M.;Franco, Sonia;Zhang, Yu;Zha, Shan
Mutations in XLF/Cernunnos (hereafter called "XLF") cause lymphocytopenia in humans, and various studies suggest an XLF role in classical non-homologous end joining (C-NHEJ). We now find that XLF-deficient mouse embryonic fibroblasts are ionizing radiation (IR) sensitive and severely impaired for ability to support V(D)J recombination. Yet, mature lymphocyte numbers in XLF-deficient mice are only modestly decreased. Moreover, XLF-deficient pro-B lines, while IR-sensitive, carry out V(D)J recombination at nearly wild-type levels. Correspondingly, XLF/p53-double-deficient mice are not markedly prone to the pro-B lymphomas that occur in previously characterized C-NHEJ/p53-deficient mice; however, like other C-NHEJ/p53-deficient mice they still develop medulloblastomas. Despite nearly normal V(D)J recombination in developing B cells, XLF-deficient mature B cells are moderately defective for IgH class switch recombination. Together, our results implicate XLF as a C-NHEJ factor, but also indicate that developing mouse lymphocytes harbor cell type specific factors/pathways that compensate for absence of XLF function during V(D)J recombination.
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影响因子:
56.9
作者:
Celeste, A;Petersen, S;Nussenzweig, A
通讯作者:
Nussenzweig, A
影响因子:
64.5
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DOI:
10.1084/jem.20061460
发表时间:
2007-06-11
期刊:
The Journal of experimental medicine
影响因子:
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作者:
通讯作者:
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影响因子:
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作者:
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通讯作者:
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