Inhibition of protein phosphatase 2A with a small molecule LB100 radiosensitizes nasopharyngeal carcinoma xenografts by inducing mitotic catastrophe and blocking DNA damage repair.
Inhibition of protein phosphatase 2A with a small molecule LB100 radiosensitizes nasopharyngeal carcinoma xenografts by inducing mitotic catastrophe and blocking DNA damage repair.
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用小分子 LB100 抑制蛋白磷酸酶 2A,通过诱导有丝分裂灾难和阻断 DNA 损伤修复,使鼻咽癌异种移植物放射增敏。
DOI:
10.18632/oncotarget.2258
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发表时间:
2014-09-15
期刊:
影响因子:
--
通讯作者:
Zeng YX
中科院分区:
文献类型:
--
作者:
Lv P;Wang Y;Ma J;Wang Z;Li JL;Hong CS;Zhuang Z;Zeng YX
Nasopharyngeal carcinoma (NPC), while uncommon worldwide, is a major health problem in China. Although local radiation and surgery provide good control of NPC, better treatments that permit reductions in radiation dosing are needed. Inhibition of protein phosphatase 2A (PP2A), a ubiquitous multifunctional enzyme with critical roles in cell cycle regulation and DNA-damage response, reportedly sensitizes cancer cells to radiation and chemotherapy. We studied PP2A inhibition with LB100, a small molecule currently in a Phase I clinical trial, on radiosensitization of two human nasopharyngeal cell lines: CNE1, which is reportedly radioresistant, and CNE2. In both cell lines, LB100 exposure increased intracellular p-Plk1, TCTP, and Cdk1 and decreased p53, changes associated with cell cycle arrest, mitotic catastrophe and radio-inhibition of cell proliferation. Mice bearing subcutaneous xenografts of either cell line were administered 1.5 mg/kg LB100 daily for three days and a single dose of 20 Gy radiation (day 3), which produced marked and prolonged tumor mass regression (dose enhancement factors of 2.98 and 2.27 for CNE1 and CNE2 xenografts, respectively). Treatment with either LB100 or radiation alone only transiently inhibited xenograft growth. Our results support further exploration of PP2A inhibition as part of radiotherapy regimens for NPC and potentially other solid tumors.
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影响因子:
2.3
作者:
Enserink JM;Kolodner RD
通讯作者:
Kolodner RD
DOI:
10.1073/pnas.0709879104
发表时间:
2007-12-11
影响因子:
11.1
作者:
Forester, Craig M.;Maddox, Jessica;Virshup, David M.
通讯作者:
Virshup, David M.
DOI:
10.1083/jcb.111.6.2537
发表时间:
1990-12
期刊:
The Journal of cell biology
影响因子:
--
作者:
Hinrichsen R;Wilson E;Lukas T;Craig T;Schultz J;Watterson DM
通讯作者:
Watterson DM
影响因子:
7.4
作者:
Fang, Weiyi;Li, Xin;Yao, Kaitai
通讯作者:
Yao, Kaitai
影响因子:
11.2
作者:
Kalev, Peter;Simicek, Michal;Sablina, Anna
通讯作者:
Sablina, Anna