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已发表论文

细胞质 TIMP3 与 miR-222 之间的负相关性表明 NSCLC 预后良好

 

Authors Lei Y, Liu Z, Yang W

Received 28 April 2018

Accepted for publication 10 July 2018

Published 6 September 2018 Volume 2018:11 Pages 5551—5557

DOI https://doi.org/10.2147/OTT.S172522

Checked for plagiarism Yes

Review by Single-blind

Peer reviewers approved by Dr Cristina Weinberg

Peer reviewer comments 2

Editor who approved publication: Dr Sanjeev Srivastava

Background: The aim of this study was to observe the expression of microRNA-222 (miR-222) and matrix metalloproteinase inhibitor 3 (TIMP3) in non-small cell lung cancer (NSCLC) and discuss their significance.
Methods: A total of 230 patients with NSCLC were enrolled in the observation group during the operation. Ninety-eight normal adjacent tissues were used as the control group. Two groups of miR-222 and TIMP3 were detected by in situ hybridization and immunohistochemistry. The distribution of miR-222 and TIMP3 in A549/H358/PC9 cells was observed by immunofluorescence. Chi-squared and Spearman correlation tests were used to analyze the relationship among miR-222, TIMP3 expression, and clinicopathological parameters of NSCLC. Kaplan–Meier and Cox proportional hazards regression were used to analyze the prognostic impact of miR-222 and TIMP3.
Results: Immunohistochemistry showed that the expression of miR-222 in lung cancer tissue was significantly higher, but TIMP3 was lower than that in normal lung tissue ( = 0.0001 for the former and  = 0.0002 for the latter). Meanwhile, miR-222 and TIMP3 were mainly distributed in the cytoplasm. Among them, cTIMP3 accounted for 70.29% (72/101), cmiR-222 for 59.35% (92/155), 14.85% for nTIMP3 (15/101), and 18.06% for nmiR-222 (28/155). There was a significant difference in distribution (both  < 0.0001). The expression of miR-222 and TIMP3 were negatively correlated in lung cancer tissues ( = -0.43,  = 0.0219). With the progression of clinical stage, the positive intensity of cTIMP3 showed a decreasing trend, while the cmiR-222 showed a reverse trend (the former  = 0.0024 and the latter  < 0.0001). In the Kaplan–Meier prognostic analysis, we found that the high expression of cTIMP3 could predict a better prognosis ( = 0.0040), whereas cmiR-222 was the opposite ( = 0.0016). Multivariate analysis shows that both can be used as independent factors.
Conclusion: TIMP3 expression in lung cancer is relatively low and has a negative correlation with lung cancer staging and prognosis, suggesting that it may play a defensive function in the development of lung cancer, while miR-222 has the opposite effect, and the expression of both proteins is negatively correlated, suggesting that in lung cancer progresses, both proteins may play some role together.
Keywords: lung cancer,tumor markers, A549/h358/pc9, biological mechanism, immuno-fluorescence




Figure 3 Analysis of cytoplasmic TIMP3 and miR-222 prognostic functions.