| Title |
Expression and significance of miRNA-21 and BTG2 in lung cancer
|
|---|---|
| Published in |
Tumor Biology, July 2013
|
| DOI | 10.1007/s13277-013-0992-8 |
| Pubmed ID | |
| Authors |
Qing Sun, Meng Hang, Xuedan Guo, Wenlong Shao, Guangqiao Zeng |
| Abstract |
This study investigates the expression of micro-ribonucleic acid-21 (miRNA-21) and B cell translocation gene 2 (BTG2) in lung cancer cells. We examined the impact of miRNA-21 on biological characteristics of lung cancer cells, such as growth, proliferation, apoptosis, and invasion. The expression of miRNA-21 and BTG2 protein in lung cancer cell lines (A549, HCC827, NCI-H292, and 95-D) was examined using quantitative reverse transcription-polymerase chain reaction and Western blot analysis, respectively. Subsequently, the regulatory role of miRNA-21 on BTG2 was explored by inhibiting miRNA-21 expression in 95-D cells using miRNA-21-antisense oligonucleotides (miRNA-21 ASO). The impact of miRNA-21 on the biological characteristics of 95-D cells was further studied using methylthiazol tetrazolium assays, flow cytometry, and Transwell invasion chamber assays. The impact of miRNA-21 on the expression of cyclin D1, caspase-3, and matrix metalloprotease-9 (MMP9) was also studied. miRNA-21 expression was significantly higher in lung cancer cell lines (A549, HCC827, NCI-H282, and 95-D) than that in normal human bronchial epithelial cells (HBE; p < 0.05). The pattern of BTG2 protein expression was exactly the opposite of miRNA-21 expression in lung cancer cells. BTG2 was highly expressed in HBE cells and was expressed at very low levels in lung cancer cell lines (A549, HCC827, NCI-H292, and 95-D). High miRNA-21 expression may inhibit BTG2 protein expression, whereas the inhibition of miRNA-21 expression may promote BTG2 protein expression in 95-D cells. Cell viability and invasion of 95-D cells were significantly lower in the miRNA-21 ASO-transfected group than that in the control ASO-transfected group and untransfected group (p < 0.05). The number of apoptotic cells was significantly higher in the miRNA-21 ASO-transfected group than that in the control ASO-transfected and untransfected groups (p < 0.05). The expression level of cyclin D1 and MMP9 in 95-D cells was significantly lower in the miRNA-21 ASO-transfected group than in the control ASO-transfected and untransfected groups (p < 0.05). Meanwhile, caspase-3 expression was significantly higher in the miRNA-21 ASO-transfected group than that in the control ASO-transfected and untransfected groups (p < 0.05). miRNA-21 overexpression may inhibit the BTG2 gene in lung cancer cells. miRNA-21 may promote cell proliferation and invasion and inhibit cell apoptosis in 95-D cells. |
X Demographics
The data shown below were collected from the profile of 1 X user who shared this research output. Click here to find out more about how the information was compiled.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Unknown | 1 | 100% |
Demographic breakdown
| Type | Count | As % |
|---|---|---|
| Members of the public | 1 | 100% |
Mendeley readers
The data shown below were compiled from readership statistics for 19 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Japan | 1 | 5% |
| Denmark | 1 | 5% |
| Unknown | 17 | 89% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Professor | 3 | 16% |
| Researcher | 3 | 16% |
| Student > Ph. D. Student | 3 | 16% |
| Student > Doctoral Student | 2 | 11% |
| Student > Bachelor | 2 | 11% |
| Other | 4 | 21% |
| Unknown | 2 | 11% |
| Readers by discipline | Count | As % |
|---|---|---|
| Agricultural and Biological Sciences | 5 | 26% |
| Medicine and Dentistry | 5 | 26% |
| Biochemistry, Genetics and Molecular Biology | 3 | 16% |
| Engineering | 2 | 11% |
| Veterinary Science and Veterinary Medicine | 1 | 5% |
| Other | 0 | 0% |
| Unknown | 3 | 16% |
Attention Score in Context
This research output has an Altmetric Attention Score of 1. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 24 July 2013.
All research outputs
#18,347,414
of 22,721,584 outputs
Outputs from Tumor Biology
#1,370
of 2,622 outputs
Outputs of similar age
#145,596
of 194,007 outputs
Outputs of similar age from Tumor Biology
#23
of 30 outputs
Altmetric has tracked 22,721,584 research outputs across all sources so far. This one is in the 11th percentile – i.e., 11% of other outputs scored the same or lower than it.
So far Altmetric has tracked 2,622 research outputs from this source. They receive a mean Attention Score of 2.2. This one is in the 30th percentile – i.e., 30% of its peers scored the same or lower than it.
Older research outputs will score higher simply because they've had more time to accumulate mentions. To account for age we can compare this Altmetric Attention Score to the 194,007 tracked outputs that were published within six weeks on either side of this one in any source. This one is in the 12th percentile – i.e., 12% of its contemporaries scored the same or lower than it.
We're also able to compare this research output to 30 others from the same source and published within six weeks on either side of this one. This one is in the 13th percentile – i.e., 13% of its contemporaries scored the same or lower than it.