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Down-regulation of miR-24-3p in colorectal cancer is associated with malignant behavior

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Abstract

Deregulation of microRNAs is a frequent event in the tumorigenesis and tumor progression. The aim of this study was to investigate the clinical significance and potential role of miR-24-3p expression in colorectal cancer (CRC). The expression level of miR-24-3p was determined in 95 CRC patients who underwent radical resection by quantitative real-time PCR. The associations between miR-24-3p expression and clinicopathological parameters were analyzed. In vitro function assays including cell proliferation, cell migration and invasion were further explored. We found that miR-24-3p was reduced in CRC tissues compared with their corresponding non-cancerous tissues (P < 0.001) and significantly correlated with local invasion (P = 0.002), lymph node metastasis (P = 0.0007) and clinical stage (P < 0.001). Moreover, Kaplan–Meier survival analysis showed that patients with low miR-24-3p level had a significantly poorer prognosis than those with high miR-24-3p level (P < 0.001). Multivariate analysis revealed that miR-24-3p (HR 2.767; 95 % CI 1.203–6.364; P = 0.017) and clinical TNM stage (HR 0.456; 95 % CI 0.212–0.978; P = 0.044) could be independent prognostic indicators for overall survival rates of CRC patients. In addition, functional assays showed that over-expression of miR-24-3p suppressed CRC cell proliferation, cell migration and invasion. miR-24-3p functions as a tumor suppressor in CRC. Down-regulation of miR-24-3p contributes to the development and progression of CRC and may have a potential role in prognosis and therapy.

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Acknowledgments

This study was supported by National Natural Science Foundation of China (81271916, 81301506), Natural Science Foundation of Shandong (Grant No. ZR2013HM104), the Fundamental Research Funds of Shandong University and the National Key Clinical Medical Specialties Foundation.

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The authors declare no conflict of interest.

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Authors and Affiliations

  1. Department of Clinical Laboratry, Qilu Hospital, Shandong University, 107 Wenhua Xi Road, Jinan, 250012, China

    Yang Gao, Yimin Liu, Lutao Du, Juan Li, Ailin Qu, Xin Zhang, Lili Wang & Chuanxin Wang

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  1. Yang Gao
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  2. Yimin Liu
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  3. Lutao Du
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  4. Juan Li
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  7. Lili Wang
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  8. Chuanxin Wang
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Correspondence to Chuanxin Wang.

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Gao, Y., Liu, Y., Du, L. et al. Down-regulation of miR-24-3p in colorectal cancer is associated with malignant behavior. Med Oncol 32, 362 (2015). https://doi.org/10.1007/s12032-014-0362-4

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  • DOI: https://doi.org/10.1007/s12032-014-0362-4

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