Roya Gholami - Faculty of Nursing and Midwifery, Islamic Azad University of Shahrekord Branch, Shahrekord, Iran
Asghar Arshi - Young Researchers and Elite Club, Najafabad Branch, Islamic Azad University, Najafabad, Iran

Introduction & Aim: MicroRNAs (miRNAs) are small non-coding RNAs that contribute to modulating signaling pathways after radiation exposure and have emerged as a potential therapeutic target or biomarker in the radiation response of cancer. miR-30-3p has tumor suppressive function through the mechanism underlying transcriptional repression of KRT7. This study was aimed to compare miR-30-3p expression profile in human breast cancer using RT-qPCR.Methods: Twenty samples from patients with breast cancer and twenty samples from non-tumor were collected by a pathologist specialist. After RNA extraction from tumoral and normal tissue samples, cDNA was synthesized according to protocol and RT-qPCR carried out using SYBR®Premix Ex TaqTM II kit. miR-30-3p expression profile was analyzed by ΔΔCT method.Results: Our results revealed that the mean of miR-30-3p expression profile in human breast cancer is down-regulated in comparison with control group.Conclusion: Overall, the results of the present study revealed distinct differences in the expression profile of miR-30-3p to control group (down-regulation of miR-30-3p), and this miRNA can be used as biomarkers for cancer therapy.

miR-30-3p, Breast cancer, RT-qPCR