p53-dependent senescence delays Emu-myc-induced B-cell lymphomagenesis.
p53-dependent senescence delays Emu-myc-induced B-cell lymphomagenesis.
复制标题
DOI:
10.1038/onc.2009.423
复制
发表时间:
2010-03-04
期刊:
影响因子:
8
通讯作者:
Lozano, G.
中科院分区:
文献类型:
--
作者:
Post, S. M.;Quintas-Cardama, A.;Terzian, T.;Smith, C.;Eischen, C. M.;Lozano, G.
The effect of p53-dependent cell-cycle arrest and senescence on Eμ-myc-induced B-cell lymphoma development remains controversial. To address this question, we crossed Eμ-myc mice with the p53515C mutant mouse, encoding the mutant p53R172P protein that retains the ability to activate the cell-cycle inhibitor and senescence activator p21. Importantly, this mutant lacks the ability to activate p53-dependent apoptotic genes. Hence, Eμ-myc mice that harbor two p53515C alleles are completely defective for p53-dependent apoptosis. Both Eμ-myc::p53515C/515C and Eμ-myc::p53515C/+ mice survive significantly longer than Eμ-myc::p53+/− mice, indicating the importance of the p53-dependent non-apoptotic pathways in B-cell lymphomagenesis. In addition, the p53515C allele is deleted in several Eμ-myc::p53515C/+ lymphomas, further emphasizing the functionality of p53R172P in tumor inhibition. Lymphomas from both Eμ-myc::p53515C/515C and Eμ-myc::p53515C/+ mice retain the ability to upregulate p21, resulting in cellular senescence. Senescence-associated β-galactosidase (SA β-gal) activity was observed in lymphomas from Eμ-myc::p53+/+, Eμ-myc::p53515C/515C and Eμ-myc::p53515C/+ mice but not in lymphomas isolated from Eμ-myc::p53+/− mice. Thus, in the absence of p53-dependent apoptosis, the ability of p53R172P to induce senescence leads to a significant delay in B-cell lymphoma development.
登录
查看更多内容
DOI:
10.1073/pnas.92.20.9363
发表时间:
1995-09-26
影响因子:
11.1
作者:
DIMRI, GP;LEE, XH;CAMPISI, J
通讯作者:
CAMPISI, J
影响因子:
8
作者:
Pantoja, C;Serrano, M
通讯作者:
Serrano, M
DOI:
10.1073/pnas.0606343104
发表时间:
2006-12-26
影响因子:
11.1
作者:
Barboza, Juan A.;Liu, Geng;Lozano, Guillermina
通讯作者:
Lozano, Guillermina
影响因子:
30.8
作者:
Liu, G;Parant, JM;Lozano, G
通讯作者:
Lozano, G
影响因子:
64.8
作者:
BANDARA, LR;LATHANGUE, NB
通讯作者:
LATHANGUE, NB