Evaluation of miR-330-3p and BMI1 Expression in Colorectal Cancer Patients, Healthy Adjacent Tissues, and Polypoid Adenomatous Lesions

Authors

  • Ali Mahdavinezhad Research Center for Molecular Medicine, Department of Molecular Medicine and Genetics, Medical School, Hamadan University of Medical Sciences, Hamadan, Iran.
  • Ali Reza Soltanian Modeling of Non-communicable Diseases Research Center, School of Public Health Hamadan University of Medical Sciences, Hamadan, Iran.
  • Massoud Saidijam Research Center for Molecular Medicine, Department of Molecular Medicine and Genetics, Medical School, Hamadan University of Medical Sciences, Hamadan, Iran.
  • Parviz Basiri School of Medicine, Hamadan University of Medical Sciences, Hamadan, Iran.
  • Razieh Amini Research Center for Molecular Medicine, Department of Molecular Medicine and Genetics, Medical School, Hamadan University of Medical Sciences, Hamadan, Iran.
  • Saeid Afshar Research Center for Molecular Medicine, Department of Molecular Medicine and Genetics, Medical School, Hamadan University of Medical Sciences, Hamadan, Iran.
Abstract:

MicroRNAs (miRNAs) have emerged as essential gene expression regulators associated with human diseases such as colorectal cancer (CRC). The purpose of this study was to evaluate the expression of miR-330-3p and its target gene BMI1 in tissue samples of patients with CRC, polyp, and healthy adjacent tissue samples and their association with clinicopathological and demographic factors such as age, tumor stage, grade, lymph node invasion of the tumor. Following the extraction of total RNA from approximately 50 mg of colon and rectum tissue of 82 patients with CRC, 13 polypoid lesions, and 26 marginal healthy tissues using RiboEx reagent, cDNA synthesis was performed, and then quantitative real-time PCR was used to detect the expression levels of miR-330-3p and BMI1. Alterations in the gene expression were assessed using the 2(-∆∆ CT) method. The expression of miR-330-3p in all of the CRC samples was significantly lower than in adjacent healthy tissues and polyp (P<0.001). BMI1 was up-regulated in 97.9% of CRC tissue compared to healthy adjacent tissues and polyps (P<0.001). A negative reverse correlation between the miR-330-3p and BMI1 gene was observed in the CRC samples (r= -0.882, P<0.001). Down-regulation of miR-330-3p and BMI1 overexpression strongly correlates with higher tumor stage and lymph node invasion. The AUC for miR-330-3p and BMI1expression was 0.982 (sensitivity, 98.5%; specificity, 78.8%), and 0.971 (sensitivity, 97.6%; specificity, 84.6%) (P<0.001), respectively. Our results indicated that miR-330-3p and BMI1 expression probably could be considered potential diagnostic or prognostic biomarkers for CRC patient.

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volume 11  issue 4

pages  0- 0

publication date 2023-07

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