High Expression of a TRNA Derivative Associates with Poor Survival and Independently Predicts Colorectal Cancer Recurrence

Overview

Journal Biomedicines

Specialty Biomedical Engineering

Date 2022 May 28

PMID 35625858

Authors

Panagiotis Tsiakanikas

Panagiotis G Adamopoulos

Dimitra Tsirba

Pinelopi I Artemaki

Iordanis N Papadopoulos

Christos K Kontos

Andreas Scorilas

Affiliations

Soon will be listed here.

Abstract

Colorectal cancer (CRC) is the second most lethal cause of cancer-related deaths in Europe. Fragments of tRNA are conserved among vertebrates, characterized by pleiotropic regulatory functions and have been found to discriminate colorectal tumors from normal colorectal mucosa. In the current study, we investigated the prognostic utility of 5'-tiRNA-Pro levels in CRC. For this purpose, total RNA was extracted from 155 malignant colorectal tumors and 74 adjacent non-cancerous tissue specimens, polyadenylated and reverse-transcribed using an oligo-dT adapter as primer. Real-time quantitative PCR (qPCR) was used to assess the levels of 5'-tiRNA-Pro. Kaplan-Meier survival analysis demonstrated that high 5'-tiRNA-Pro levels predict both poor disease-free survival (DFS) and overall survival (OS) of CRC patients. Of note, high 5'-tiRNA-Pro levels retain their unfavorable prognostic value in patients with rectal cancer and/or moderately differentiated CRC (grade II). More importantly, multivariate cox regression analysis highlighted that the overexpression of 5'-tiRNA-Pro constitutes an adverse prognostic factor predicting short-term relapse of CRC patients independently of the established prognosticators in CRC. Finally, bioinformatics analysis unveiled a potentially critical role of 5'-tiRNA-Pro regarding the maintenance of cellular homeostasis, signaling, cell communication, and cellular motility.

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