Decreased expression of microRNA let-7i and its association with chemotherapeutic response in human gastric cancer
<p>Abstract</p> <p>Background</p> <p>MicroRNA let-7i has been proven to be down-regulated in many human malignancies and correlated with tumor progression and anticancer drug resistance. Our study aims to characterize the contribution of miRNA let-7i to the initiation a...
Main Authors: | , , , , , |
---|---|
Format: | Article |
Language: | English |
Published: |
BMC
2012-10-01
|
Series: | World Journal of Surgical Oncology |
Subjects: | |
Online Access: | http://www.wjso.com/content/10/1/225 |
id |
doaj-050460c1912e43df855b62ace48e7824 |
---|---|
record_format |
Article |
spelling |
doaj-050460c1912e43df855b62ace48e78242020-11-24T23:39:30ZengBMCWorld Journal of Surgical Oncology1477-78192012-10-0110122510.1186/1477-7819-10-225Decreased expression of microRNA let-7i and its association with chemotherapeutic response in human gastric cancerLiu KunQian TaoTang LimingWang JieYang HaohuaRen Jun<p>Abstract</p> <p>Background</p> <p>MicroRNA let-7i has been proven to be down-regulated in many human malignancies and correlated with tumor progression and anticancer drug resistance. Our study aims to characterize the contribution of miRNA let-7i to the initiation and malignant progression of locally advanced gastric cancer (LAGC), and evaluate its possible value in neoadjuvant chemotherapeutic efficacy prediction.</p> <p>Methods</p> <p>Eighty-six previously untreated LAGC patients who underwent preoperative chemotherapy and radical resection were included in our study. Let-7i expression was examined for pairs of cancer tissues and corresponding normal adjacent tissues (NATs), using quantitative RT-PCR. The relationship of let-7i level to clinicopathological characteristics, pathologic tumor regression grades after chemotherapy, and overall survival (OS) was also investigated.</p> <p>Results</p> <p>Let-7i was significantly down-regulated in most tumor tissues (78/86: 91%) compared with paired NATs (<it>P</it> < 0.001), and low levels of let-7i were significantly correlated with local invasion, lymphatic metastasis, and poor pathologic tumor response. Multivariate Cox regression analysis revealed that low let-7i expression was an unfavorable prognostic factor of OS (hazard ratio (HR) = 2.316, <it>P</it> =0.024) independently of other clinicopathological factors, including tumor node metastasis (TNM) stage (HR = 3.226, <it>P</it> = 0.013), depth of infiltration (HR = 4.167, <it>P</it> < 0.001), and lymph node status (HR = 2.245, <it>P</it> = 0.037).</p> <p>Conclusions</p> <p>These findings indicate that let-7i may be a good candidate for use a therapeutic target and a potential tissue marker for the prediction of chemotherapeutic sensitivity and prognosis in LAGC patients.</p> http://www.wjso.com/content/10/1/225Gastric cancerMicroRNA let-7iNeoadjuvant chemotherapyTumor response |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Liu Kun Qian Tao Tang Liming Wang Jie Yang Haohua Ren Jun |
spellingShingle |
Liu Kun Qian Tao Tang Liming Wang Jie Yang Haohua Ren Jun Decreased expression of microRNA let-7i and its association with chemotherapeutic response in human gastric cancer World Journal of Surgical Oncology Gastric cancer MicroRNA let-7i Neoadjuvant chemotherapy Tumor response |
author_facet |
Liu Kun Qian Tao Tang Liming Wang Jie Yang Haohua Ren Jun |
author_sort |
Liu Kun |
title |
Decreased expression of microRNA let-7i and its association with chemotherapeutic response in human gastric cancer |
title_short |
Decreased expression of microRNA let-7i and its association with chemotherapeutic response in human gastric cancer |
title_full |
Decreased expression of microRNA let-7i and its association with chemotherapeutic response in human gastric cancer |
title_fullStr |
Decreased expression of microRNA let-7i and its association with chemotherapeutic response in human gastric cancer |
title_full_unstemmed |
Decreased expression of microRNA let-7i and its association with chemotherapeutic response in human gastric cancer |
title_sort |
decreased expression of microrna let-7i and its association with chemotherapeutic response in human gastric cancer |
publisher |
BMC |
series |
World Journal of Surgical Oncology |
issn |
1477-7819 |
publishDate |
2012-10-01 |
description |
<p>Abstract</p> <p>Background</p> <p>MicroRNA let-7i has been proven to be down-regulated in many human malignancies and correlated with tumor progression and anticancer drug resistance. Our study aims to characterize the contribution of miRNA let-7i to the initiation and malignant progression of locally advanced gastric cancer (LAGC), and evaluate its possible value in neoadjuvant chemotherapeutic efficacy prediction.</p> <p>Methods</p> <p>Eighty-six previously untreated LAGC patients who underwent preoperative chemotherapy and radical resection were included in our study. Let-7i expression was examined for pairs of cancer tissues and corresponding normal adjacent tissues (NATs), using quantitative RT-PCR. The relationship of let-7i level to clinicopathological characteristics, pathologic tumor regression grades after chemotherapy, and overall survival (OS) was also investigated.</p> <p>Results</p> <p>Let-7i was significantly down-regulated in most tumor tissues (78/86: 91%) compared with paired NATs (<it>P</it> < 0.001), and low levels of let-7i were significantly correlated with local invasion, lymphatic metastasis, and poor pathologic tumor response. Multivariate Cox regression analysis revealed that low let-7i expression was an unfavorable prognostic factor of OS (hazard ratio (HR) = 2.316, <it>P</it> =0.024) independently of other clinicopathological factors, including tumor node metastasis (TNM) stage (HR = 3.226, <it>P</it> = 0.013), depth of infiltration (HR = 4.167, <it>P</it> < 0.001), and lymph node status (HR = 2.245, <it>P</it> = 0.037).</p> <p>Conclusions</p> <p>These findings indicate that let-7i may be a good candidate for use a therapeutic target and a potential tissue marker for the prediction of chemotherapeutic sensitivity and prognosis in LAGC patients.</p> |
topic |
Gastric cancer MicroRNA let-7i Neoadjuvant chemotherapy Tumor response |
url |
http://www.wjso.com/content/10/1/225 |
work_keys_str_mv |
AT liukun decreasedexpressionofmicrornalet7ianditsassociationwithchemotherapeuticresponseinhumangastriccancer AT qiantao decreasedexpressionofmicrornalet7ianditsassociationwithchemotherapeuticresponseinhumangastriccancer AT tangliming decreasedexpressionofmicrornalet7ianditsassociationwithchemotherapeuticresponseinhumangastriccancer AT wangjie decreasedexpressionofmicrornalet7ianditsassociationwithchemotherapeuticresponseinhumangastriccancer AT yanghaohua decreasedexpressionofmicrornalet7ianditsassociationwithchemotherapeuticresponseinhumangastriccancer AT renjun decreasedexpressionofmicrornalet7ianditsassociationwithchemotherapeuticresponseinhumangastriccancer |
_version_ |
1725513189707218944 |