title: Clinicopathological significance of microRNA-31, -143 and -145 expression in colorectal cancer.
abstract: We are just beginning to understand how microRNAs (miRNAs) are involved in tumor-related processes in humans. Applying real-time RT-PCR, we investigated the miR-31, miR-143 and miR-145 expression in 98 primary CRC specimens, along with the corresponding normal mucosa specimens, and analyze the relationship of their expression with clinicopathological features. Our results showed the miR-31 expression was up-regulated in CRC compared to normal mucosa (p = 0.001). Furthermore, miR-31 expression was positively related to advanced TNM stage (p = 0.026) and deeper invasion of tumors (p = 0.024). MiR-145 was down-regulated in both colon (p = 0.001) and rectal (p = 0.012) cancer. MiR-143 was only down-regulated in colon cancer (p = 0.023) but not in rectal cancer (p = 0.351). There was no relationship of miR-143 and miR-145 expression with other clinicopathological features (p > 0.05), except that the miR-145 expression was related to cancer site (p = 0.03). In conclusion, the miR-31 overexpression may be involved in the development and progression of CRC. The miR-143 and miR-145 may play a certain role in the development of colon and/or rectal cancers but not in progression of the disease.
authors.affiliation: Department of Colorectal Surgery, West China Hospital, Sichuan University, Chengdu, China.
authors.forename: Chao-Jie
authors.initials: CJ
authors.lastname: Wang
authors.forename: Zong-Guang
authors.initials: ZG
authors.lastname: Zhou
authors.forename: Ling
authors.initials: L
authors.lastname: Wang
authors.forename: Lie
authors.initials: L
authors.lastname: Yang
authors.forename: Bin
authors.initials: B
authors.lastname: Zhou
authors.forename: Jun
authors.initials: J
authors.lastname: Gu
authors.forename: Hong-Ying
authors.initials: HY
authors.lastname: Chen
authors.forename: Xiao-Feng
authors.initials: XF
authors.lastname: Sun
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001483:Base Sequence; D014408:Biomarkers, Tumor / Q000235:genetics*; D015179:Colorectal Neoplasms / Q000235:genetics* / Q000473:pathology*; D017931:DNA Primers / Q000235:genetics; D015870:Gene Expression; D006801:Humans; D007413:Intestinal Mucosa / Q000378:metabolism; D035683:MicroRNAs / Q000235:genetics*; D008875:Middle Aged; D009361:Neoplasm Invasiveness / Q000235:genetics; D009367:Neoplasm Staging; D012334:RNA, Neoplasm / Q000235:genetics*; D020133:Reverse Transcriptase Polymerase Chain Reaction; D015854:Up-Regulation; D055815:Young Adult
chemical_list: D014408:Biomarkers, Tumor; D017931:DNA Primers; C534612:MIRN31 microRNA, human; D035683:MicroRNAs; D012334:RNA, Neoplasm