Identification of serum exosomal lncRNA MIAT as a novel diagnostic and prognostic biomarker for gastric cancer
Open Access
- 10 April 2020
- journal article
- research article
- Published by Wiley in Journal of Clinical Laboratory Analysis
- Vol. 34 (8), e23323
- https://doi.org/10.1002/jcla.23323
Abstract
Background Accumulating evidence has demonstrated that long non‐coding RNAs (lncRNAs) MIAT is significantly upregulated in many cancer types including gastric cancer (GC). However, the potential clinical significance of serum exosomal MIAT in GC is unknown. Methods In this study, a total of 109 GC patients, 48 gastric adenoma patients, and 50 healthy individuals were recruited. Serum exosomal MIAT levels were detected in all participants using quantitative real‐time reverse transcription‐polymerase chain reaction (qRT‐PCR). Results The exosomes we extracted from the serum samples were positive for TSG101, CD63, and Flotillin‐1, which were known exosome markers. Serum exosomal MIAT levels were significantly higher in GC patients than in gastric adenoma patients and healthy controls. Interestingly, gastric adenoma patients with higher serum exosomal MIAT expression were more prone to develop GC. In addition, serum exosomal MIAT levels were significantly decreased in post‐treatment blood samples compared to pre‐treatment samples, while markedly increased in the cases suffering recurrence. Moreover, serum exosomal MIAT upregulation was significantly associated with worse clinical variables and shorter survival. Furthermore, serum exosomal MIAT was identified as an independent prognostic factor for GC. Conclusions Collectively, serum exosomal lncRNA MIAT might serve as a promising novel biomarker for monitoring the progression of GC.Keywords
Funding Information
- Scientific Research Project of Affiliated Hospital of North Sichuan Medical College (No.2019JC007)
- Sichuan Provincial Department of Education (No.17ZB0169)
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