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      Long noncoding RNA LINC00115 promotes breast cancer metastasis by inhibiting miR‐7

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          Abstract

          Breast cancer is the second leading cause of cancer‐related deaths in women. The long noncoding RNA LINC00115 has been reported to be involved in the poor outcome of patients with breast cancer, but the biological function and underlying mechanism remain unclear. Here, we report that LINC00115 expression is increased in triple‐negative breast cancer tissue compared with matched normal tissue, and LINC00115 knockdown suppresses breast cancer cell migration and invasion. Furthermore, we show that LINC00115 directly targets miR‐7 and inhibits its expression. LINC00115 also reduces the expression of KLF4, which is a direct target of miR‐7 and is involved in breast cancer metastasis. Together, our findings suggest that LINC00115 promotes breast cancer metastasis through modulating the expression of miR‐7 and KLF4.

          Abstract

          LINC00115 expression is increased in breast cancer tissue and promotes tumor cell migration and invasion by inhibiting miR‐7 expression. This miRNA has been identified as a tumor suppressor in breast cancer, and one of its direct targets, KLF4, is an oncogene in breast cancer.

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          Most cited references 22

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          Cancer statistics, 2018

          Each year, the American Cancer Society estimates the numbers of new cancer cases and deaths that will occur in the United States and compiles the most recent data on cancer incidence, mortality, and survival. Incidence data, available through 2014, were collected by the Surveillance, Epidemiology, and End Results Program; the National Program of Cancer Registries; and the North American Association of Central Cancer Registries. Mortality data, available through 2015, were collected by the National Center for Health Statistics. In 2018, 1,735,350 new cancer cases and 609,640 cancer deaths are projected to occur in the United States. Over the past decade of data, the cancer incidence rate (2005-2014) was stable in women and declined by approximately 2% annually in men, while the cancer death rate (2006-2015) declined by about 1.5% annually in both men and women. The combined cancer death rate dropped continuously from 1991 to 2015 by a total of 26%, translating to approximately 2,378,600 fewer cancer deaths than would have been expected if death rates had remained at their peak. Of the 10 leading causes of death, only cancer declined from 2014 to 2015. In 2015, the cancer death rate was 14% higher in non-Hispanic blacks (NHBs) than non-Hispanic whites (NHWs) overall (death rate ratio [DRR], 1.14; 95% confidence interval [95% CI], 1.13-1.15), but the racial disparity was much larger for individuals aged <65 years (DRR, 1.31; 95% CI, 1.29-1.32) compared with those aged ≥65 years (DRR, 1.07; 95% CI, 1.06-1.09) and varied substantially by state. For example, the cancer death rate was lower in NHBs than NHWs in Massachusetts for all ages and in New York for individuals aged ≥65 years, whereas for those aged <65 years, it was 3 times higher in NHBs in the District of Columbia (DRR, 2.89; 95% CI, 2.16-3.91) and about 50% higher in Wisconsin (DRR, 1.78; 95% CI, 1.56-2.02), Kansas (DRR, 1.51; 95% CI, 1.25-1.81), Louisiana (DRR, 1.49; 95% CI, 1.38-1.60), Illinois (DRR, 1.48; 95% CI, 1.39-1.57), and California (DRR, 1.45; 95% CI, 1.38-1.54). Larger racial inequalities in young and middle-aged adults probably partly reflect less access to high-quality health care. CA Cancer J Clin 2018;68:7-30. © 2018 American Cancer Society.
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            The emerging role of lncRNAs in cancer.

             Maite Huarte (2015)
            It is increasingly evident that many of the genomic mutations in cancer reside inside regions that do not encode proteins. However, these regions are often transcribed into long noncoding RNAs (lncRNAs). The recent application of next-generation sequencing to a growing number of cancer transcriptomes has indeed revealed thousands of lncRNAs whose aberrant expression is associated with different cancer types. Among the few that have been functionally characterized, several have been linked to malignant transformation. Notably, these lncRNAs have key roles in gene regulation and thus affect various aspects of cellular homeostasis, including proliferation, survival, migration or genomic stability. This review aims to summarize current knowledge of lncRNAs from the cancer perspective. It discusses the strategies that led to the identification of cancer-related lncRNAs and the methodologies and challenges involving the study of these molecules, as well as the imminent applications of these findings to the clinic.
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              Functional Classification and Experimental Dissection of Long Noncoding RNAs

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                Author and article information

                Contributors
                1554597615@qq.com
                gly_0417@126.com
                Journal
                FEBS Open Bio
                FEBS Open Bio
                10.1002/(ISSN)2211-5463
                FEB4
                FEBS Open Bio
                John Wiley and Sons Inc. (Hoboken )
                2211-5463
                11 June 2020
                July 2020
                : 10
                : 7 ( doiID: 10.1002/feb4.v10.7 )
                : 1230-1237
                Affiliations
                [ 1 ] Department of Breast the Second Affiliated Hospital of Nanchang University China
                [ 2 ] Department of Ultrasound the Second Affiliated Hospital of Nanchang University China
                Author notes
                [* ] Correspondence

                L. Guo, Department of Ultrasound, the Second Affiliated Hospital of Nanchang University, Nanchang 330031, China

                E‐mail: gly_0417@ 123456126.com

                and

                C. Yuan, Department of Breast, the Second Affiliated Hospital of Nanchang University, Nanchang 330031, China

                E‐ mail: 1554597615@ 123456qq.com

                Article
                FEB412842
                10.1002/2211-5463.12842
                7327907
                32175684
                © 2020 The Second Affiliated Hospital of Nanchang University. FEBS Open Bio published by John Wiley & Sons Ltd on behalf of Federation of European Biochemical Societies.

                This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

                Page count
                Figures: 4, Tables: 0, Pages: 8, Words: 4109
                Product
                Funding
                Funded by: the Jiangxi provincial health department project
                Award ID: 20151081
                Categories
                Research Article
                Research Articles
                Custom metadata
                2.0
                July 2020
                Converter:WILEY_ML3GV2_TO_JATSPMC version:5.8.5 mode:remove_FC converted:01.07.2020

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