Centrosome amplification induced by survivin suppression enhances both chromosome instability and radiosensitivity in glioma cells.
Centrosome amplification induced by survivin suppression enhances both chromosome instability and radiosensitivity in glioma cells.
复制标题
DOI:
10.1038/sj.bjc.6604160
复制
发表时间:
2008-01-29
影响因子:
8.8
通讯作者:
Kurisu, K.
中科院分区:
文献类型:
--
作者:
Saito, T.;Hama, S.;Izumi, H.;Yamasaki, F.;Kajiwara, Y.;Matsuura, S.;Morishima, K.;Hidaka, T.;Shrestha, P.;Sugiyama, K.;Kurisu, K.
Glioblastoma is characterised by invasive growth and a high degree of radioresistance. Survivin, a regulator of chromosome segregation, is highly expressed and known to induce radioresistance in human gliomas. In this study, we examined the effect of survivin suppression on radiosensitivity in malignant glioma cells, while focusing on centrosome aberration and chromosome instability (CIN). We suppressed survivin by small interfering RNA transfection, and examined the radiosensitivity using a clonogenic assay and a trypan blue exclusion assay in U251MG (p53 mutant) and D54MG (p53 wild type) cells. To assess the CIN status, we determined the number of centrosomes using an immunofluorescence analysis, and the centromeric copy number by fluorescence in situ hybridisation. As a result, the radiosensitisation differed regarding the p53 status as U251MG cells quickly developed extreme centrosome amplification (=CIN) and enhanced the radiosensitivity, while centrosome amplification and radiosensitivity increased more gradually in D54MG cells. TUNEL assay showed that survivin inhibition did not lead to apoptosis after irradiation. This cell death was accompanied by an increased degree of aneuploidy, suggesting mitotic cell death. Therefore, survivin inhibition may be an attractive therapeutic target to overcome the radioresistance while, in addition, proper attention to CIN (centrosome number) is considered important for improving radiosensitivity in human glioma.
登录
查看更多内容
DOI:
10.1111/j.1349-7006.2002.tb02483.x
发表时间:
2002-09
期刊:
Japanese journal of cancer research : Gann
影响因子:
--
作者:
Asanuma K;Kobayashi D;Furuya D;Tsuji N;Yagihashi A;Watanabe N
通讯作者:
Watanabe N
DOI:
10.1083/jcb.153.4.865
发表时间:
2001-05-14
期刊:
The Journal of cell biology
影响因子:
--
作者:
Adams RR;Maiato H;Earnshaw WC;Carmena M
通讯作者:
Carmena M
影响因子:
2.9
作者:
McLaughlin, N;Annabi, B;Béliveau, R
通讯作者:
Béliveau, R
影响因子:
6.5
作者:
Pennati, M;Binda, M;Zaffaroni, N
通讯作者:
Zaffaroni, N
影响因子:
3.8
作者:
Lee MA;Park GS;Lee HJ;Jung JH;Kang JH;Hong YS;Lee KS;Kim DG;Kim SN
通讯作者:
Kim SN