Long noncoding RNA MIAT promotes non-small cell lung cancer proliferation and metastasis through MMP9 activation

I-Lu Lai; Chin-An Yang; Pei-Chin Lin; Wen-Ling Chan; Ya-Ting Lee; Ju-Chen Yen; Ya-Sian Chang; Jan-Gowth Chang

doi:10.18632/oncotarget.21465

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Research Papers:

Long noncoding RNA MIAT promotes non-small cell lung cancer proliferation and metastasis through MMP9 activation

I-Lu Lai, Chin-An Yang, Pei-Chin Lin, Wen-Ling Chan, Ya-Ting Lee, Ju-Chen Yen, Ya-Sian Chang _ and Jan-Gowth Chang

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Oncotarget. 2017; 8:98148-98162. https://doi.org/10.18632/oncotarget.21465

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Abstract

I-Lu Lai1,8, Chin-An Yang2,3,4, Pei-Chin Lin5,6,7, Wen-Ling Chan1,8, Ya-Ting Lee1, Ju-Chen Yen1, Ya-Sian Chang1,2 and Jan-Gowth Chang1,2,4

1Epigenome Research Center, China Medical University Hospital, Taichung, Taiwan

2Department of Laboratory Medicine, China Medical University Hospital, Taichung, Taiwan

3Division of General Pediatrics, Children’s Hospital of China Medical University, Taichung, Taiwan

4College of Medicine, China Medical University, Taichung, Taiwan

5Graduate Institute of Clinical Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan

6Department of Pediatrics, School of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan

7Division of Hematology and Oncology, Department of Pediatrics, Kaohsiung Medical University, Kaohsiung, Taiwan

8Department of Bioinformatics and Medical Enginerring, Asia University, Taichung, Taiwan

Correspondence to:

Ya-Sian Chang, email: [email protected]

Jan-Gowth Chang, email: [email protected]

Keywords: MIAT, long noncoding RNA (lncRNA), non-small cell lung cancer (NSCLC), mixed-lineage leukemia (MLL), matrix metallopeptidase 9 (MMP9)

Received: March 31, 2017 Accepted: August 17, 2017 Published: October 03, 2017

ABSTRACT

Long noncoding RNAs (lncRNAs) play crucial roles in carcinogenesis. Myocardial infarction-associated transcript (MIAT), originally isolated as a candidate gene for myocardial infarction, has been found to act as an oncogene in chronic lymphocytic leukaemias and neuroendocrine prostate cancer (NEPC); however, little is known about its expression pattern, biological function, and underlying mechanism in non-small cell lung cancer (NSCLC). In this study, we observed that MIAT expression was upregulated in NSCLC, and its overexpression was associated with advanced tumor stage. Moreover, MIAT knockdown decreased cell proliferation, migration, invasion, and cell cycle arrested in G1 phase. Mechanistic investigation revealed that MIAT could interact with histone methyltransferase mixed-lineage leukemia (MLL). MIAT silencing impeded the binding of MLL on the matrix metalloproteinase 9 (MMP9) promoter region and epigenetically reduced MMP9 transcriptional activity. Overall, our findings suggest that MIAT expression is associated with NSCLC and may be one of the critical targets in progression and metastasis in NSCLC.

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Research Papers:

Long noncoding RNA MIAT promotes non-small cell lung cancer proliferation and metastasis through MMP9 activation

Abstract