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Actin cytoskeleton organization, cell surface modification and invasion rate of 5 glioblastoma cell lines differing in PTEN and p53 status.

Abstract：

:Glioblastoma cells exhibit highly invasive behavior whose mechanisms are not yet fully understood. The present study explores the relationship between the invasion capacity of 5 glioblastoma cell lines differing in p53 and PTEN status, expression of mTOR and several other marker proteins involved in cell invasion, actin cytoskeleton organization and cell morphology. We found that two glioblastoma lines mutated in both p53 and PTEN genes (U373-MG and SNB19) exhibited the highest invasion rates through the Matrigel or collagen matrix. In DK-MG (p53wt/PTENwt) and GaMG (p53mut/PTENwt) cells, F-actin mainly occurred in the numerous stress fibers spanning the cytoplasm, whereas U87-MG (p53wt/PTENmut), U373-MG and SNB19 (both p53mut/PTENmut) cells preferentially expressed F-actin in filopodia and lamellipodia. Scanning electron microscopy confirmed the abundant filopodia and lamellipodia in the PTEN mutated cell lines. Interestingly, the gene profiling analysis revealed two clusters of cell lines, corresponding to the most (U373-MG and SNB19, i.e. p53 and PTEN mutated cells) and less invasive phenotypes. The results of this study might shed new light on the mechanisms of glioblastoma invasion.

journal_name

Exp Cell Res

journal_title

Experimental cell research

authors

Djuzenova CS,Fiedler V,Memmel S,Katzer A,Hartmann S,Krohne G,Zimmermann H,Scholz CJ,Polat B,Flentje M,Sukhorukov VL

doi

10.1016/j.yexcr.2014.08.013

subject

Has Abstract

pub_date

2015-01-15 00:00:00

pages

346-357

issue

2

eissn

0014-4827

issn

1090-2422

pii

S0014-4827(14)00341-3

journal_volume

330

pub_type

杂志文章

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