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<front>
<journal-meta>
<journal-id journal-id-type="publisher-id">OL</journal-id>
<journal-title-group>
<journal-title>Oncology Letters</journal-title>
</journal-title-group>
<issn pub-type="ppub">1792-1074</issn>
<issn pub-type="epub">1792-1082</issn>
<publisher>
<publisher-name>D.A. Spandidos</publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id pub-id-type="doi">10.3892/ol.2020.12018</article-id>
<article-id pub-id-type="publisher-id">OL-0-0-12018</article-id>
<article-categories>
<subj-group>
<subject>Retraction</subject>
</subj-group>
</article-categories>
<title-group>
<article-title>Long non-coding RNA TTN-AS1 promotes breast cancer cell migration and invasion via sponging miR-140-5p</article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author"><name><surname>Xue</surname><given-names>Jie</given-names></name></contrib>
<contrib contrib-type="author"><name><surname>Zhang</surname><given-names>Zhixia</given-names></name></contrib>
<contrib contrib-type="author"><name><surname>Li</surname><given-names>Xiaona</given-names></name></contrib>
<contrib contrib-type="author"><name><surname>Ren</surname><given-names>Qingfang</given-names></name></contrib>
<contrib contrib-type="author"><name><surname>Wang</surname><given-names>Qinghua</given-names></name></contrib>
</contrib-group>
<pub-date pub-type="ppub">
<month>11</month>
<year>2020</year></pub-date>
<pub-date pub-type="epub">
<day>25</day>
<month>08</month>
<year>2020</year></pub-date>
<volume>20</volume>
<issue>5</issue>
<elocation-id>157</elocation-id>
<permissions>
<copyright-statement>Copyright: &#x00A9; Xue et al.</copyright-statement>
<copyright-year>2020</copyright-year>
<license license-type="open-access">
<license-p>This is an open access article distributed under the terms of the <ext-link ext-link-type="uri" xlink:href="https://creativecommons.org/licenses/by/4.0/">Creative Commons Attribution License</ext-link>, which permits unrestricted use, distribution, reproduction and adaptation in any medium and for any purpose provided that it is properly attributed. For attribution, the original author(s), title, publication source (PeerJ) and either DOI or URL of the article must be cited.</license-p></license>
</permissions>
</article-meta>
</front>
<body>
<p>Oncol Lett 19: <related-article xmlns:xlink="http://www.w3.org/1999/xlink" related-article-type="retracted-article" vol="19" page="1255" id="RA1" xlink:href="10.3892/ol.2019.11222" ext-link-type="doi">1255-1260</related-article>, 2020; DOI: 10.3892/ol.2019.11222</p>
<p>Following the publication of this article, the authors contacted the Editor to request its retraction on account of having been unable to obtain the same results on performing further experiments. Subsequently, the Editorial office were also informed by an interested reader that data featured in Figs. 2 and 3 had also appeared in other non-related publications, and the office were able to confirm that these images were indeed the same as those featured in the other publications.</p>
<p>The Editor has agreed to the authors&#x2019; request, and therefore this article has been retracted from <italic>Oncology Letters</italic>. All the authors agree to this retraction. The authors apologize to the readership of the Journal for any inconvenience caused.</p>
</body>
</article>
