Abstract
Background: MicroRNAs (miRNAs), as tissue specific regulators of gene transcription, may be served as biomarkers for Colorectal Cancer (CRC).
Objective: This study aimed to investigate the potential role of the cancer-related hsa-miRNAs as biomarkers in Colon Cancer (CC) and Rectal Cancer (RC).
Methods: A total of 148 CRC samples (74 rectum and 74 colon) and 74 adjacent normal tissues were collected to examine the differential expression of selected ten hsa-miRNAs using quantitative Reverse Transcriptase PCR (qRT-PCR).
Results: The significantly elevated levels of miR-21, miR-133b, miR-18a, miR-20a, and miR-135b, and decreased levels of miR-34a, miR-200c, miR-145, and let-7g were detected in colorectal tumors compared to the healthy tissues (P<0.05). Hsa-miR-20a was significantly overexpressed in rectum compared to colon (p =0.028) from a cut-off value of 3.15 with a sensitivity of 66% and a specificity of 60% and an AUC value of 0.962. Also, hsa-miR-145 was significantly overexpressed in colon compared to the rectum (p =0.02) from a cut-off value of 3.9 with a sensitivity of 55% and a specificity of 61% and an AUC value of 0.91.
Conclusion: In conclusion, hsa-miR-20a and hsa-miR-145, as potential tissue-specific biomarkers for distinguishing RC and CC, improve realizing the molecular differences between these local tumors.
Keywords: Biomarker, colon, location, microRNA, rectum, Rectal Cancer (RC).
Graphical Abstract
[PMID: 26523217]
[http://dx.doi.org/10.1007/978-1-59745-458-2_17]
[http://dx.doi.org/10.22074/cellj.2018.5366] [PMID: 29633600]
[http://dx.doi.org/10.1186/2008-2231-22-47] [PMID: 24902843]
[http://dx.doi.org/10.3233/CBM-160642] [PMID: 27802206]
[http://dx.doi.org/10.3892/mmr.2015.4596] [PMID: 26647993]
[PMID: 27309477]
[http://dx.doi.org/10.1111/j.1751-2980.2011.00551.x] [PMID: 22188913]
[PMID: 28843229]
[http://dx.doi.org/10.1200/JCO.2016.34.15_suppl.3552]
[http://dx.doi.org/10.1002/gcc.20891] [PMID: 21584903]
[http://dx.doi.org/10.1158/1078-0432.CCR-11-1570] [PMID: 21976543]
[http://dx.doi.org/10.1007/s11888-017-0352-y] [PMID: 28367107]
[http://dx.doi.org/10.1002/gcc.20844] [PMID: 21213373]
[http://dx.doi.org/10.1016/j.cca.2010.05.002] [PMID: 20452339]
[http://dx.doi.org/10.1186/1471-2407-12-505] [PMID: 23121918]
[http://dx.doi.org/10.1007/s12029-018-0055-x] [PMID: 29404790]
[http://dx.doi.org/10.1097/PPO.0b013e318258b78f] [PMID: 22647361]
[http://dx.doi.org/10.1007/978-3-319-42059-2_9] [PMID: 27573900]
[http://dx.doi.org/10.1080/07357907.2017.1408814] [PMID: 29243990]
[http://dx.doi.org/10.5812/jjm.27297] [PMID: 27540448]
[PMID: 27306340]
[PMID: 27482340]
[http://dx.doi.org/10.1007/s12011-015-0256-0] [PMID: 25663478]
[http://dx.doi.org/10.1038/nature11252] [PMID: 22810696]
[http://dx.doi.org/10.1002/gcc.22265] [PMID: 26171582]
[http://dx.doi.org/10.3892/ijo_00000720] [PMID: 20664940]
[http://dx.doi.org/10.1016/j.amjsurg.2013.12.019] [PMID: 24791632]
[http://dx.doi.org/10.1136/gut.2003.036848] [PMID: 15710986]
[http://dx.doi.org/10.1093/annonc/mdu275] [PMID: 25057166]
[http://dx.doi.org/10.1080/028418698429595] [PMID: 9677101]
[http://dx.doi.org/10.1111/j.1440-1746.2007.04923.x] [PMID: 17532785]
[http://dx.doi.org/10.1053/j.gastro.2010.01.054] [PMID: 20420945]
[http://dx.doi.org/10.1503/cjs.031312] [PMID: 24869613]
[http://dx.doi.org/10.1136/gut.45.1.45] [PMID: 10369703]
[http://dx.doi.org/10.1186/s13059-015-0614-4] [PMID: 25887251]
[http://dx.doi.org/10.1158/1055-9965.EPI-11-0035] [PMID: 21551242]
[http://dx.doi.org/10.18632/oncotarget.11173] [PMID: 27517623]
[PMID: 22576798]
[http://dx.doi.org/10.1152/ajpgi.00208.2014] [PMID: 25477374]
[http://dx.doi.org/10.3892/mmr.2014.2144] [PMID: 24737193]
[http://dx.doi.org/10.18632/oncotarget.9900] [PMID: 27286257]
[http://dx.doi.org/10.1002/jcp.25051] [PMID: 26012475]
[http://dx.doi.org/10.18632/oncotarget.6403] [PMID: 26621842]
[http://dx.doi.org/10.1038/ctg.2016.11] [PMID: 26963002]
[http://dx.doi.org/10.1155/2009/921907] [PMID: 19242066]
[http://dx.doi.org/10.1111/jcmm.12358] [PMID: 25124875]