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Published on: October 25, 2018
[hsa-miR-125a-5p Enhances Invasion Ability in Non-Small Lung Carcinoma Cell Lines.]
Lili Jiang1, Qingfu Zhang, Jihong Chang
1Department of Pathology, College of Basic Medical Sciences, China Medical University, and Department of Pathology, the First Hospital of China Medical University, Shenyang 110001, China.
Background:
MicroRNAs (miRNAs) are short non-coding RNAs that posttranscriptionally regulate gene expression by partially binding complementary to target sites in mRNAs. Although some impaired miRNA regulations have been observed in many human cancers, the functions of miR-125a are still unclear. The aim of this study is to investigate the expression of hsa-miR-125a-5p in NSCLC cell lines and the relationship between hsa-miR-125a-5p and the invasion of lung cancer cells.
Methods:
The expression of hsa-miR-125a-5p and the effectiveness for a given period time after being transfected sense hsa-miR-125a-5p 2'-O-methyl oligonucleotide, which were 24 h, 36 h, 48 h, 60 h and 72 h, were examined by realtime PCR. Meanwhile, we investigated the modification of invasive ability in A549 and NCI-H460 cells by transwell.
Results:
Real-time PCR showed that hsa-miR-125a-5p was poorly-expressed in 6 lung cancer cell lines, especially in LH7, NCI-H460, SPC-A-1 and A549. The highest expression of hsa-miR-125a-5p occurred in the cells transfected with sense hsa-miR-125a-5p 2'-O-methyl oligonucleotide 36 h. Furthermore, the invasive abilities of A549 and NCI-H46O were enhanced by up-regulating hsa-miR-125a-5p.
Conclusions:
hsa-miR-125a-5p was poorly-expressed in lung cancer cells and it could enhance lung cancer cell invasion by up-regulating hsa-miR-125a-5p.
Insights
MicroRNA-125a-5p (miR-125a-5p) is underexpressed in lung cancer cells. Upregulating miR-125a-5p enhances lung cancer cell invasion, suggesting its role in non-small cell lung cancer progression.
Area of Science:
- Molecular Biology
- Genetics
- Oncology
Context:
- MicroRNAs (miRNAs) are key regulators of gene expression.
- Dysregulated miRNA expression is implicated in various human cancers.
- The specific role of hsa-miR-125a-5p in non-small cell lung cancer (NSCLC) remains largely undefined.
Purpose:
- To investigate the expression levels of hsa-miR-125a-5p in NSCLC cell lines.
- To determine the relationship between hsa-miR-125a-5p expression and lung cancer cell invasion.
- To assess the functional impact of modulating hsa-miR-125a-5p levels on cancer cell invasiveness.
Summary:
- Real-time PCR revealed significantly lower expression of hsa-miR-125a-5p across six NSCLC cell lines, particularly in LH7, NCI-H460, SPC-A-1, and A549.
- Transfection with a sense hsa-miR-125a-5p oligonucleotide led to the highest expression at 36 hours.
- Upregulation of hsa-miR-125a-5p was observed to enhance the invasive capabilities of A549 and NCI-H460 cells.
Impact:
- This study identifies hsa-miR-125a-5p as a potentially tumor-suppressive miRNA in NSCLC.
- The findings suggest that reduced hsa-miR-125a-5p expression contributes to increased lung cancer cell invasion.
- hsa-miR-125a-5p may represent a novel therapeutic target for inhibiting NSCLC metastasis.
