Differential expression of miRNAs related to autophagy pathway in tissue and serum samples of colorectal cancer patients

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Umit Y., Nesibe Y., Kevser T., Arzu E., Nihat A., Umit Z.

Bratislava Medical Journal, vol.123, no.9, pp.634-640, 2022 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 123 Issue: 9
  • Publication Date: 2022
  • Doi Number: 10.4149/bll_2022_102
  • Journal Name: Bratislava Medical Journal
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, EMBASE
  • Page Numbers: pp.634-640
  • Keywords: Autophagy, Beclin-1, Biomarker, Colorectal cancer, Mirna
  • Istanbul University Affiliated: Yes


© 2022. Bratislava Medical Journal. All Rights Reserved.BACKGROUND: This study was aimed to investigate the relationship of miR-17-5p, miR-30b, miR-30d, miR-216a and miR-216b associated with autophagy gene beclin 1, and beclin 1 gene with colorectal cancer (CRC). MATERIALS AND METHODS: Forty-seven patients with CRC and 50 healthy individuals with no cancer history were included in this study. In the serum, tumor and non-tumoral tissue samples of the CRC patients, and in the serum samples of the healthy subjects, expression levels of miRNAs were detected by qRT-PCR. The beclin 1 gene expression levels were determined by qRT-PCR, and protein levels were determined by Western blot method in tumor and non-tumor tissue samples of the patients. RESULTS: The miR-17-5p and miR-30d expressions were found to be higher in tumor tissue as compared to patient non-tumor tissues, while expressions of beclin-1, miR-30b and miR-216a were found to be lower. In addition, the beclin-1 protein levels were signifi cantly decreased in the tumor tissue as compared to those in the patient non-tumor tissues. The miR-30d expression was signifi cantly reduced in the serum of the patients when the serum samples of CRC patients and healthy controls were compared. CONCLUSION: The beclin 1 gene may play a role as a tumor suppressor in CRC. Moreover, these miRNAs cannot be used as highly reliable biomarkers in serum for CRC diagnosis