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Tuberculosis & Respiratory Diseases

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Vol.67 No.5
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MicroRNA Expression Profiles in Korean Non-Small Cell Lung Cancer

Tuberculosis & Respiratory Diseases / Tuberculosis & Respiratory Diseases,
2009, v.67 no.5, pp.413-421

Young Jin Kim (Konyang University Hospital)
Hyun Min Cho (Konyang University Hospital)
Soo Young Lee (Konyang University)
Jin Sung Jang (Kyungpook National University)
Jin Eun Choi (Kyungpook National University)

Min Gyu Kang (Konyang University Hospital)
Yu Mi Lee (Konyang University Hospital)
Sun Jung Kwon (Konyang University Hospital)



Young, J. K. , Hyun, M. C. , Soo, Y. L. , Jin, S. J. , Jin, E. C. , Min, G. K. , Yu, M. L. , Sun, J. K. , & (2009). MicroRNA Expression Profiles in Korean Non-Small Cell Lung Cancer. Tuberculosis & Respiratory Diseases, 67(5), 413-421.
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Abstract

Background: MicroRNAs (miRNAs) play an important role in the regulation of cell proliferation, apoptosis, development and differentiation. Several studies have shown that aberrant expression of miRNAs is involved in cancer development and progression by regulating the expression of proto-oncogenes or tumor suppressor genes. In this study, we investigated miRNA expression profiles in Korean patients with non-small cell lung cancer (NSCLC). Methods: We performed miRNA microarray analysis containing 60∼65 bp oligonucleotide probes representing human 318 miRNAs and validated the results of the microarray with Northern blot analysis or quantitative RT-PCR. Next, we examined the correlation between miRNA expression and the target gene transcriptional profile using a human whole-genome-expression microarray. Results: We showed that 35 miRNAs were expressed differentially in the NSCLCs and corresponding non-malignant lung tissues. We showed that 35 miRNAs were expressed differentially in the NSCLCs and corresponding nonmalignant lung tissues. Thirteen of the 35 differentially expressed miRNAs were newly identified in the present study. Of the 35 miRNAs, 2 (miR-371 and miR-210) were over-expressed in lung cancers, and 33 miRNAs, including miR-145, were under-expressed in lung cancers. miR-99b expression consistently showed a negative correlation with FGFR3 expression. Conclusion: Albeit a small number of patients were examined, these results suggest that miRNA expression profiles in Korean lung cancers may be somewhat different from the expression profiles reported on lung cancers in Western populations. The findings suggest that miR-99b might be a tumor suppressor through its up-regulation of FGFR3.

keywords
MicroRNAs, Carcinoma, Non-Small-Cell Lung, Korea

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