Upregulation of miR-24 promotes cell proliferation by targeting NAIF1 in non-small cell lung cancer.
Recent studies have implied that aberration of miR-24 is linked to various human cancers. However, its role in non-small cell lung cancer (NSCLC) remains obscure. Here, we found that miR-24 was significantly upregulated in NSCLC tissues and patients' serum. High expression of miR-24 in patients' serum was independently correlated with a shorter overall survival of NSCLC patients. Depletion of miR-24 inhibited cell proliferation and anchorage-independent survival ability in lung cancer cell lines and reduced tumor formation ability in nude mice. Nuclear apoptosis-inducing factor 1 (NAIF1) was identified to be a functional target of miR-24 in the human lung. Next, we observed that the NAIF1 mRNA expression level in NSCLC tissues was suppressed in comparison to that in adjacent normal tissues. Restoration of NAIF1 in lung cancer cell inhibited cell proliferation and anchorage-independent survival ability, which were found to be similar with those from transfecting a miR-24 inhibitor into lung cancer cells. In conclusion, our study demonstrated that miR-24 was upregulated in NSCLC, and suppressing the expression of miR-24 inhibited tumor characteristics. MiR-24 acted as an oncomir, at least partially through regulation of its functional target NAIF1 in NSCLC. MiR-24 may serve as a novel potential biomarker for NSCLC diagnosis and prognosis.
Department of Thoracic Surgery, The Fourth Affiliated Hospital, Harbin Medical University, 37 Yiyuan Road, Nangang District, Harbin, 150001, People's Republic of China.
Guibin
G
Zhao
Lijie
L
Liu
Tianshu
T
Zhao
Shoude
S
Jin
Sibo
S
Jiang
Shouqiang
S
Cao
Jingquan
J
Han
Yanzhong
Y
Xin
Qing
Q
Dong
Xian
X
Liu
Jian
J
Cui
D000328:Adult; D000368:Aged; D000818:Animals; D051017:Apoptosis Regulatory Proteins / Q000235:genetics*; D002289:Carcinoma, Non-Small-Cell Lung / Q000235:genetics / Q000401:mortality / Q000473:pathology*; D049109:Cell Proliferation; D005260:Female; D006801:Humans; D008175:Lung Neoplasms / Q000235:genetics / Q000401:mortality / Q000473:pathology*; D008297:Male; D051379:Mice; D035683:MicroRNAs / Q000097:blood / Q000502:physiology*; D008875:Middle Aged; D009687:Nuclear Proteins / Q000235:genetics*; D015854:Up-Regulation
D051017:Apoptosis Regulatory Proteins; C543845:MIRN24 microRNA, human; D035683:MicroRNAs; C511414:NAIF1 protein, human; D009687:Nuclear Proteins