Abstract:
PURPOSE:MicroRNAs are small, non-coding RNAs that are critical regulators of various diseases including cancer, and may represent a novel class of cancer biomarkers. Recent reports have highlighted the oncogenic aspects of miR-125b. However, the level and clinical relevance of circulating miR-125b transcripts in human serum of non-small-cell lung cancer (NSCLC) patients are unclear. The purpose of this study was to identify circulating miR-125b transcripts in human serum for use as a biomarker for stratification and prediction of prognosis in NSCLC. METHODS:We analyzed serum levels of miR-125b in 193 patients with different stages of NSCLC. Blood samples were collected before surgery and therapy. Quantitative reverse transcription-polymerase chain reaction of circulating miR-125b transcripts was performed directly in serum to improve the efficiency of miRNA assessment. Receiver operating characteristic analysis was used to evaluate the sensitivity and specificity of serum miR-125b. RESULTS:We found that serum miR-125b was consistently expressed in the non-tumor group and was significantly associated with NSCLC stage. miR-125b expression was capable of separating NSCLC patients from control groups with an area under the curve of 0.786. Furthermore, patients with high miR-125b expression displayed a significantly poorer prognosis compared with patients with low expression (p < 0.0001). Multivariate analysis indicated that high miR-125b expression was an independent prognostic factor for survival. CONCLUSIONS:We propose that serum miR-125b may represent a novel biomarker in NSCLC patients and that high miR-125b expression is an independent prognostic factor for survival.
journal_name
J Cancer Res Clin Oncoljournal_title
Journal of cancer research and clinical oncologyauthors
Yuxia M,Zhennan T,Wei Zdoi
10.1007/s00432-012-1285-0subject
Has Abstractpub_date
2012-12-01 00:00:00pages
2045-50issue
12eissn
0171-5216issn
1432-1335journal_volume
138pub_type
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