NDLI: MALAT1 promotes the proliferation and metastasis of osteosarcoma cells by activating the PI3K/Akt pathway.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Dong, Yongqiang Liang, Guojun Yuan, Bo Yang, Chaoqun Gao, Rui Zhou, Xuhui
Description	Author Affiliation: Dong Y ( Department of Spine Surgery, Xinchang County People's Hospital, 117 Gushanzhong Road, Xinchang County, Zhejiang Province, 312500, China, dyq1867@163.com.)
Abstract	Metastasis-associated lung adenocarcinoma transcript 1 (MALAT1), one of the first found cancer-associated long noncoding RNAs (lncRNAs), involves in the development and progression of many types of tumors. An aberrant expression of MALAT1 was observed in hepatocellular carcinoma, cervical cancer, breast cancer, ovarian cancer, and colorectal cancer. However, the exact effects and molecular mechanisms of MALAT1 in osteosarcoma progression are still unknown up to now. Here, we investigated the role of MALAT1 in human osteosarcoma cell lines and clinical tumor samples in order to determine the function of this molecule. In our research, the MALAT1 messenger RNA (mRNA) was highly expressed in human osteosarcoma tissues, and its expression level was closely correlated with pulmonary metastasis. Then, we employed lentivirus-mediated knockdown of MALAT1 in U-2 OS and SaO2 to determine the role of MALAT1 in osteosarcoma cell lines. Lentivirus-mediated MALAT1 small interfering RNA (siRNA) could efficiently downregulated the expression level of MALAT1 in osteosarcoma cell lines. Knockdown of MALAT1 inhibited the proliferation and invasion of human osteosarcoma cell and suppressed its metastasis in vitro and vivo. At the same time, the proliferating cell nuclear antigen (PCNA), matrix metallopeptidase 9 (MMP-9), phosphorylated PI3Kp85 , and Akt expressions were significantly inhibited in MALAT1-deleted cells. These findings indicated that MALAT1 might suppress the tumor growth and metastasis via PI3K/AKT signaling pathway. Taken together, our data indicated that MALAT1 might be an oncogenic lncRNA that promoted proliferation and metastasis of osteosarcoma and could be regarded as a therapeutic target in human osteosarcoma.
File Format	HTM / HTML
ISSN	10104283
Issue Number	3
Volume Number	36
e-ISSN	14230380
Journal	Tumor Biology
Language	English
Publisher	Springer
Publisher Date	2015-03-01
Publisher Place	Netherlands
Access Restriction	Subscribed
Subject Keyword	Discipline Medicine__semicolon__oncology Bone Neoplasms Metabolism Osteosarcoma Phosphatidylinositol 3-kinases Genetics Proto-oncogene Proteins C-akt Rna, Long Noncoding Adaptor Proteins, Signal Transducing Adolescent Adult Cell Line, Tumor Cell Proliferation Down-regulation Female Humans Male Matrix Metalloproteinase 9 Neoplasm Metastasis Nuclear Proteins Pathology Rna, Messenger Signal Transduction Young Adult Journal Article
Content Type	Text
Resource Type	Article
Subject	Medicine Cancer Research

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