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2017 ; 13
(5
): 3882-3888
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Snail homolog 1 is involved in epithelial-mesenchymal transition-like processes
in human glioblastoma cells
#MMPMID28529599
Kühnöl CD
; Würfel C
; Staege MS
; Kramm C
Oncol Lett
2017[May]; 13
(5
): 3882-3888
PMID28529599
show ga
Despite advancements in neurosurgery, chemotherapy and radiation therapy, the
outcome of patients with glioblastoma remains poor. The migration of tumor cells
from the primary tumor site with subsequent invasion of these cells into the
surrounding normal brain tissue is frequently responsible for relapse and
treatment failure. The present study hypothesized that snail homolog 1 (SNAI1), a
factor critically involved in the epithelial-mesenchymal transition (EMT) of
human carcinoma cells, may also contribute to an invasive EMT-like phenotype of
glioblastoma cells. The majority of glioblastoma cell lines investigated in the
present study expressed SNAI1 at basal levels. The present study overexpressed
SNAI1 in glioblastoma cell lines by lentiviral transfer of human SNAI1
complementary DNA. In addition, the inhibition of SNAI1 expression was achieved
by lentiviral transfer of a short hairpin RNA specific for SNAI1. SNAI1
overexpression increased proliferation of one of the cell lines, U251MG, but
exhibited only a weak effect on the migration and invasion of glioblastoma cells.
However, downregulation of SNAI1 significantly decreased the invasive capacity of
all investigated cell lines. In parallel, regained expression of E-cadherin, a
marker that is usually lost during EMT, was observed subsequent to SNAI1
knockdown in the glioblastoma cell lines U87MG and U251MG. The data of the
present study suggest that certain key genes of the EMT in carcinoma are also
involved in the migration and invasion of human glioblastoma cells.