PMID- 34196150 OWN - NLM STAT- MEDLINE DCOM- 20220211 LR - 20220211 IS - 1314-2143 (Electronic) IS - 0204-8043 (Linking) VI - 63 IP - 3 DP - 2021 Jun 30 TI - A pilot study reveals the potential of miR-31-3p and miR-196a-5p as non-invasive biomarkers in advanced laryngeal cancer. PG - 355-364 LID - 10.3897/folmed.63.e55346 [doi] AB - INTRODUCTION: Recently, miRNAs have become popular molecules used as non-invasive biomarkers in cancer diseases. AIM: The aim of the study was to explore the expression of four miRNAs isoforms: miR-31-3p, miR-196a-5p, miR-210-3p and miR-424-5p in plasma and tissue samples from patients with advanced laryngeal squamous cell carcinoma (LSCC) and healthy controls. MATERIALS AND METHODS: Fresh-frozen tumour and normal laryngeal tissue as well as plasma samples were obtained from 22 patients diagnosed with advanced LSCC. The control group included plasma samples from 21 cancer-free volunteers. Total RNA (including miRNAs) extraction, reverse transcription and real time qPCR were the laboratory techniques used in the study. The obtained results were analyzed using SPSS software v. 23. RESULTS: We found that miR-31-3p, miR-196a-5p, and miR-210-3p levels were significantly elevated in laryngeal tumour tissue, but only the levels of miR-31-3p and miR-196a-5p were significantly upregulated in the plasma LSCC target group. Positive correlation was obtained for miR-31-3p (rs=0.443, p=0.039) and miR-196a-5p (rs=0.548; p=0.008) between plasma and adjacent tumour tissue LSCC samples. ROC analyses were used to evaluate the discriminative power of both miRNAs alone and in combination. The combination of miR-31-3p and miR-196a-5p showed best results with AUC=0.978 (95% CI: 0.945-1.000, p. CI - This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. FAU - Kyurkchiyan, Silva Garo AU - Kyurkchiyan SG AD - Medical University of Sofia, Sofia, Bulgaria. FAU - Popov, Todor Miroslavov AU - Popov TM AUID- ORCID: 0000-0002-8205-3573 AD - Medical University of Sofia, Sofia, Bulgaria. FAU - Shakola, Felitsiya AU - Shakola F AD - Medical University of Sofia, Sofia, Bulgaria. FAU - Rangachev, Julian AU - Rangachev J AD - Medical University of Sofia, Sofia, Bulgaria. FAU - Mitev, Vanyo Ivanov AU - Mitev VI AD - Medical University of Sofia, Sofia, Bulgaria. FAU - Kaneva, Radka AU - Kaneva R AD - Medical University of Sofia, Sofia, Bulgaria. LA - eng PT - Journal Article PL - Bulgaria TA - Folia Med (Plovdiv) JT - Folia medica JID - 2984761R RN - 0 (Biomarkers, Tumor) RN - 0 (MIRN31 microRNA, human) RN - 0 (MicroRNAs) SB - IM MH - Biomarkers, Tumor/genetics MH - Humans MH - *Laryngeal Neoplasms/genetics MH - MicroRNAs/genetics/*supply & distribution MH - Pilot Projects MH - Squamous Cell Carcinoma of Head and Neck OTO - NOTNLM OT - LSCC OT - laryngeal squamous cell carcinoma OT - miRNAs OT - non-invasive biomarker OT - plasma EDAT- 2021/07/02 06:00 MHDA- 2022/02/12 06:00 CRDT- 2021/07/01 07:32 PHST- 2020/06/11 00:00 [received] PHST- 2020/08/11 00:00 [accepted] PHST- 2021/07/01 07:32 [entrez] PHST- 2021/07/02 06:00 [pubmed] PHST- 2022/02/12 06:00 [medline] AID - 10.3897/folmed.63.e55346 [doi] PST - ppublish SO - Folia Med (Plovdiv). 2021 Jun 30;63(3):355-364. doi: 10.3897/folmed.63.e55346.