Slug down-regulation by RNA interference inhibits invasion growth in human esophageal squamous cell carcinoma.

Abstract:

BACKGROUND:Esophageal squamous cell carcinoma (ESCC) is one of the most aggressive carcinomas of the gastrointestinal tract. We assessed the relevance of Slug in measuring the invasive potential of ESCC cells in vitro and in vivo in immunodeficient mice. METHODS:We utilized RNA interference to knockdown Slug gene expression, and effects on survival and invasive carcinoma were evaluated using a Boyden chamber transwell assay in vitro. We evaluated the effect of Slug siRNA-transfection and Slug cDNA-transfection on E-cadherin and Bcl-2 expression in ESCC cells. A pseudometastatic model of ESCC in immunodeficient mice was used to assess the effects of Slug siRNA transfection on tumor metastasis development. RESULTS:The EC109 cell line was transfected with Slug-siRNA to knockdown Slug expression. The TE13 cell line was transfected with Slug-cDNA to increase Slug expression. EC109 and TE13 cell lines were tested for the expression of apoptosis-related genes bcl-2 and metastasis-related gene E-cadherin identified previously as Slug targets. Bcl-2 expression was increased and E-cadherin was decreased in Slug siRNA-transfected EC109 cells. Bcl-2 expression was increased and E-cadherin was decreased in Slug cDNA-transfected TE13 cells. Invasion of Slug siRNA-transfected EC109 cells was reduced and apoptosis was increased whereas invasion was greater in Slug cDNA-transfected cells. Animals injected with Slug siRNA-transfected EC109 cells exhibited fewer seeded nodes and demonstrated more apoptosis. CONCLUSIONS:Slug down-regulation promotes cell apoptosis and decreases invasion capability in vitro and in vivo. Slug inhibition may represent a novel strategy for treatment of metastatic ESCC.

journal_name

BMC Gastroenterol

journal_title

BMC gastroenterology

authors

Tang P,Yu Z,Zhang K,Wang Y,Ma Z,Zhang S,Chen D,Zhou Y

doi

10.1186/1471-230X-11-60

subject

Has Abstract

pub_date

2011-05-20 00:00:00

pages

60

issn

1471-230X

pii

1471-230X-11-60

journal_volume

11

pub_type

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