Oncotarget

Research Papers:

miR-200b is a key regulator of tumor progression and metabolism targeting lactate dehydrogenase A in human malignant glioma

Su Hu, Qian Jiang, Dongdong Luo, Lei Zhao, Xin Fu, Yuqin Chen, Xue Song, Lihua Li, Hailin Zhao, Yingfang He and Biao Peng _

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Oncotarget. 2016; 7:48423-48431. https://doi.org/10.18632/oncotarget.10301

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Abstract

Su Hu1,*, Qian Jiang2,*, Dongdong Luo1, Lei Zhao3, Xin Fu2, Yuqin Chen2, Xue Song4, Lihua Li1, Hailin Zhao1, Yingfang He1, Biao Peng1

1Department of Neurosurgery, Cancer Center of Guangzhou Medical University, Guangzhou, Guangdong, 510095, China

2State Key Laboratory of Respiratory Disease, The 1st Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong, 510120, China

3Department of Physiology, School of Basic Science, Guangzhou Medical University, Guangzhou, Guangdong, 510182, China

4Guangdong Provincial Hospital of TCM Breast Department, Guangzhou, Guangdong, 510006, China

*These authors have contributed equally to this work

Correspondence to:

Biao Peng, email: [email protected]

Keywords: glioma, miR-200b, LDHA, proliferation, metabolism

Received: December 04, 2015     Accepted: June 04, 2016     Published: June 27, 2016

ABSTRACT

Lactate dehydrogenase A (LDHA) is involved in various cancers. In this study, we investigated the expression and function of LDHA in glioma. We found that LDHA was up-regulated in glioma samples. Furthermore, we found that overexpression of LDHA promoted proliferation, invasion and glycolysis in glioma cells. Luciferase reporter assays confirmed that LDHA was a direct target of miR-200b. miR-200b was found to be down-regulated in glioma samples, which was inversely correlated with LDHA expression. Repression of LDHA by miR-200b suppressed the glycolysis, cell proliferation and invasion of glioma cells. These results provide evidence that miR-200b acts as a tumor suppressor in glioma through the inhibition of LDHA both in vitro and in vivo. Targeting LDHA through miR-200b could be a potential therapeutic strategy in glioma.


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