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The quantitative analysis by stem-loop real-time PCR revealed the microRNA-34a, microRNA-155 and microRNA-200c overexpression in human colorectal cancer
Sichuan University, Peoples R China.
Sichuan University, Peoples R China.
Sichuan University, Peoples R China .
Sichuan University, Peoples R China.
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2012 (English)In: Medical Oncology, ISSN 1357-0560, E-ISSN 1559-131X, Vol. 29, no 5, 3113-3118 p.Article in journal (Refereed) Published
Abstract [en]

The recently identified class of microRNAs (miRNAs) provided a new insight in cancer research. As the member of miRNAs family, miR-34a, miR-155 and miR-200c abnormalities have been found in various types of cancer. However, the relationship between these three miRNAs (miR-34a, miR-155 and miR-200c) and colorectal cancer is unclear. In this study, we applied stem-loop real-time PCR to quantitatively detect miR-34a, miR-155 and miR-200c expression in 109 pair-matched human colorectal cancers and the corresponding normal mucosa. MiR-34a (2.2-fold), miR-155 (2.3-fold) and miR-200c (3.1-fold) were all expressed at higher levels in colorectal cancer (P = 0.001, 0.005 and 0.001, respectively). In rectum, miR-34a and miR-200c were significantly upregulated (P = 0.006 and 0.007), while the miR-155 overexpression was not statistically significant (P = 0.083). In colon, the higher expression of three miRNAs was seen, however, without significant difference (P andgt; 0.05). We also found that the miR-34a expression was higher in rectal cancer having more advanced TNM stage (III + IV, P = 0.03). Then miR-200c expression was positively correlated with and sera CEA level of rectal cancer patients (P = 0.04). In conclusion, our results thus suggest that the overexpression of miR-34a, miR-155 and miR-200c be associated with the development of colorectal cancer, meanwhile miR-34a may be involved in the development and progression of rectal cancer. The more deeply and larger scale research are required to prove the correlation.

Place, publisher, year, edition, pages
Humana Press (Springer Imprint) , 2012. Vol. 29, no 5, 3113-3118 p.
Keyword [en]
MicroRNA-34a, MicroRNA-155, MicroRNA-200c, Colorectal cancer, Stem-loop real-time RT-PCR
National Category
Medical and Health Sciences
URN: urn:nbn:se:liu:diva-86630DOI: 10.1007/s12032-012-0241-9ISI: 000311513800016OAI: diva2:580113

Funding Agencies|National Natural Science Foundation of China|30830100|Foundation of Ministry of Education of China|200806100058|

Available from: 2012-12-20 Created: 2012-12-20 Last updated: 2012-12-20

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Sun, Xiao-Feng
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OncologyFaculty of Health SciencesDepartment of Oncology UHL
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