title: Circulating microRNA-1290 as a novel diagnostic and prognostic biomarker in human colorectal cancer.
abstract: Circulating microRNAs (miRNAs) are attracting major interest as potential non-invasive biomarkers for colorectal cancer (CRC). This study aimed to identify a novel serum miRNA biomarker for the early detection and/or evaluating prognosis of CRC patients.
  
  
  
  Comprehensive miRNA array analysis was carried out using serum samples from patients with colorectal neoplasia and healthy controls. Next, to verify whether the candidate miRNA possessed a secretory potential, we screened miRNA expression levels in culture medium from 2 CRC cell lines, followed by serum analysis from 12 stage IV CRC, 12 adenoma, and 12 control subjects. Thereafter, we validated expression of candidate miRNAs in 179 primary CRC tissues, as well as serum samples from an independent cohort of 211 CRCs, 56 adenomas, and 57 control subjects.
  
  
  
  Through microarray analysis, we identified significantly higher levels of miRNA-1290 (miR-1290) in serum from patients with colorectal adenomas and cancers. We verified miR-1290 overexpression in serum of CRC patients in a training cohort. In the validation cohort, serum miR-1290 levels were significantly up-regulated in patients with colorectal adenomas (P < 0.0001) and cancers (P < 0.0001). Serum miR-1290 levels could robustly distinguish adenoma [area under the curve (AUC) = 0.718] and CRC patients (AUC = 0.830) from normal subjects. High miR-1290 expression in serum and tissue was significantly associated with tumor aggressiveness and poor prognosis. Moreover, serum miR-1290 levels were an independent prognostic factor [hazard ratio (HR) = 4.51; 95% confidence interval (CI) = 1.23-23.69; P = 0.0096] and an independent predictor for tumor recurrence (hazard ratio = 3.92; 95% confidence interval = 1.11-25.14; P = 0.032) in CRC.
  
  
  
  Serum miR-1290 is a novel biomarker for early detection, recurrence, and prognosis in CRC.
authors: Department of Gastrointestinal and Pediatric Surgery, Mie University Graduate School of Medicine, Tsu, Mie.
authors: H
authors: H
authors: Imaoka
authors: Department of Gastrointestinal and Pediatric Surgery, Mie University Graduate School of Medicine, Tsu, Mie ytoi0725@clin.medic.mie-u.ac.jp.
authors: Y
authors: Y
authors: Toiyama
authors: Department of Gastrointestinal and Pediatric Surgery, Mie University Graduate School of Medicine, Tsu, Mie.
authors: H
authors: H
authors: Fujikawa
authors: Department of Gastrointestinal and Pediatric Surgery, Mie University Graduate School of Medicine, Tsu, Mie.
authors: J
authors: J
authors: Hiro
authors: Department of Gastrointestinal and Pediatric Surgery, Mie University Graduate School of Medicine, Tsu, Mie.
authors: S
authors: S
authors: Saigusa
authors: Department of Gastrointestinal and Pediatric Surgery, Mie University Graduate School of Medicine, Tsu, Mie.
authors: K
authors: K
authors: Tanaka
authors: Department of Gastrointestinal and Pediatric Surgery, Mie University Graduate School of Medicine, Tsu, Mie.
authors: Y
authors: Y
authors: Inoue
authors: Department of Gastrointestinal and Pediatric Surgery, Mie University Graduate School of Medicine, Tsu, Mie.
authors: Y
authors: Y
authors: Mohri
authors: Surgery, Moriei Hospital, Kuwana City.
authors: T
authors: T
authors: Mori
authors: Surgery, Tohyama Hospital, Tsu City, Japan.
authors: T
authors: T
authors: Kato
authors: Center for Gastrointestinal Research and Center for Epigenetics, Cancer Prevention and Cancer Genomics, Baylor Research Institute and Charles A Sammons Cancer Center, Baylor University Medical Center, Dallas, USA.
authors: S
authors: S
authors: Toden
authors: Center for Gastrointestinal Research and Center for Epigenetics, Cancer Prevention and Cancer Genomics, Baylor Research Institute and Charles A Sammons Cancer Center, Baylor University Medical Center, Dallas, USA.
authors: A
authors: A
authors: Goel
authors: Department of Gastrointestinal and Pediatric Surgery, Mie University Graduate School of Medicine, Tsu, Mie.
authors: M
authors: M
authors: Kusunoki
mesh_terms: D000368:Aged; D014408:Biomarkers, Tumor / Q000097:blood* / Q000235:genetics; D000074166:Circulating MicroRNA / Q000097:blood* / Q000235:genetics; D015179:Colorectal Neoplasms / Q000097:blood* / Q000235:genetics / Q000473:pathology; D055088:Early Detection of Cancer; D005260:Female; D015972:Gene Expression Regulation, Neoplastic; D006801:Humans; D008297:Male; D035683:MicroRNAs / Q000097:blood* / Q000235:genetics; D008875:Middle Aged; D009364:Neoplasm Recurrence, Local / Q000097:blood / Q000473:pathology; D011379:Prognosis
chemical_list: D014408:Biomarkers, Tumor; D000074166:Circulating MicroRNA; C574604:MIRN1290 microRNA, human; D035683:MicroRNAs
keywords: colorectal adenoma; colorectal cancer; diagnosis; miR-1290; prognosis; serum