Title:Circulating MiR-1185¸ MiR-3183, and MiR-584 Levels in Plasma as
Diagnostic Non-invasive Biomarkers for Early Detection of Breast Cancer
Volume: 20
Issue: 3
Author(s): Abolfazl Khalafi-Nezhad, Ahmad Abdollahi, Mahdi Barazesh*, Marzieh Amani, Setare Motazedi, Vahid Ebrahimi*Ali Zarei
Affiliation:
- Cellular and Molecular Research Center, Gerash University of Medical Sciences,
Gerash, Iran
- Department of Biostatistics, School of Medicine,
Shiraz University of Medical Sciences, Shiraz, Iran
Keywords:
Breast cancer, oncomiR, diagnostic biomarker, circulating miRNAs, tumor recurrence, overall survival.
Abstract:
Introduction: MicroRNAs (miRNAs) are non-coding RNA molecules with short sequences
that function as main post-transcriptional gene regulators of different biological pathways via negative
regulation of gene expression, thereby leading to either mRNA degradation or translational
blockade. Dysregulated expression of these miRNAs has been related etiologically to many human
diseases, including breast cancer. Various cellular processes of breast cancer progression, including
cell proliferation, apoptosis, metastasis, recurrence and chemodrug resistance, are modulated by oncogenic
miRNA (oncomiR).
Objective: The objective of this investigation was to study the expression level and potential diagnostic/
prognostic roles of circulating microRNAs (miR-3183, miR-1185, and miR-584) as novel breast
cancer biomarkers.
Methods: The current study was conducted on 99 breast cancer (BC) female patients, aged between
20-63 years old, as the case group and 50 age-matched healthy females as control (HC). After microRNA
extraction from the serum samples, real-time PCR was carried out for relative expression
quantification of miR-1185, miR-3183a, and miR-584. The ROC curve analysis was performed to
investigate the diagnostic value of miRNAs.
Results: It was demonstrated that miRNA-1185, miRNA-584, and miRNA-3183 were significantly
up-regulated (p-values <0.0001) in female BC cases compared to the control group. Besides, based
on the ROC analysis for BC versus HC, it was revealed that the AUC for miRNA-584 was 0.844
(95% confidence interval (CI) and could be proposed as a diagnostic biomarker for breast cancer
screening and follow-up.
Conclusion: MiRNAs expression profiling using blood-based samples demonstrated their upregulation
in the serum and plasma and revealed the concept that circulating miRNAs have high potential as
novel noninvasive biomarkers for cancer diagnosis and screening.