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Cathepsin L is involved in X-ray-induced invasion and migration of human glioma U251 cells.

Abstract：

:An important therapeutic method of glioblastoma, the most common primary brain tumor, is radiotherapy. However, several studies reported recently that radiation could also promote the invasion and migration of malignant tumor. Herein, we have identified that a significant increase of migration and invasiveness of human glioma U251 cells undergoing X-ray was observed compared to controls, accompanied by the increase of cathepsin L (CTSL), which is a lysosomal cysteine protease overexpressed and secreted by tumor cells. To verify if there was a relationship between CTSL and the X-ray-induced glioma invasion, a CTSL specific inhibitor Z-FY-CHO or a short hairpin RNA interference was used to pretreat U251 cells. As a result, the cell invasion and migration was impaired via down-regulation of CTSL. Additionally, a marked reduction of the cell-signaling molecules Rho kinase was also detected compared with controls. We also found that CTSL is involved in EMT progress: both in vitro and in clinical specimens. Overall, our findings show that CTSL is an important protein which mediates cell invasion and migration of human glioma U251 cells induced by X-ray, and the inhibition of CTSL expression might diminish the invasion of U251 cells by reducing the activity of RhoA and CDC42 as well as EMT positive markers.

journal_name

Cell Signal

journal_title

Cellular signalling

authors

Xiong Y,Ji W,Fei Y,Zhao Y,Wang L,Wang W,Han M,Tan C,Fei X,Huang Q,Liang Z

doi

10.1016/j.cellsig.2016.10.012

subject

Has Abstract

pub_date

2017-01-01 00:00:00

pages

181-191

eissn

0898-6568

issn

1873-3913

pii

S0898-6568(16)30256-X

journal_volume

29

pub_type

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