Identification of the long noncoding RNA LET as a novel tumor suppressor in gastric cancer.
Mol Med Rep
; 15(4): 2229-2234, 2017 Apr.
Article
em En
| MEDLINE
| ID: mdl-28260083
ABSTRACT
Long non-coding RNAs (lncRNAs) have emerged recently as important factors in regulating fundamental biological processes. Alterations in the expression and function of lncRNAs have been observed to promote tumor formation, progression and metastasis. Although downregulation of the expression levels of LET lncRNA in several tumors has been reported, its role in gastric cancer remains unknown. The aim of the present study was to investigate the expression and function of LET in gastric cancer development. The expression levels of LET in 37 pairs of gastric cancer and adjacent nontumor tissues were detected by reverse transcriptionquantitative polymerase chain reaction (RTqPCR). In addition, LET expression in gastric cancer cell lines was analyzed by RTqPCR assay analysis. Furthermore, the impact of LET on cell proliferation, migration and apoptosis were detected using the cell counting kit8, wound scratch and ELISA assays, respectively. The results demonstrated that the expression level of LET was downregulated in gastric cancer tissues and cell lines (SGC7901 and MGC803) compared with normal tissues and a normal human gastric epithelial cell line (GES1). Restoration of LET expression using a synthesized recombinant overexpression vector transfected into SGC7901 and MGC803 cells, significantly inhibited cell proliferation and migration, and promoted cell apoptosis in vitro. The present study is the first to demonstrate that LET may function as a tumor suppressor in gastric cancer. The results indicate that LET may be a promising biomarker and/or a therapeutic target for gastric cancer.
Texto completo:
1
Coleções:
01-internacional
Temas:
Geral
/
Tipos_de_cancer
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Estomago
Base de dados:
MEDLINE
Assunto principal:
Estômago
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Neoplasias Gástricas
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Regulação Neoplásica da Expressão Gênica
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RNA Longo não Codificante
Tipo de estudo:
Diagnostic_studies
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Prognostic_studies
Limite:
Adult
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Aged
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Female
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Humans
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Male
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Middle aged
Idioma:
En
Revista:
Mol Med Rep
Ano de publicação:
2017
Tipo de documento:
Article