title: MiR-328 May be Considered as an Oncogene in Human Invasive Breast Carcinoma.
abstract: BACKGROUND
  The recent investigations have rendered microRNAs (miRs) as a novel biomarker in cancer research. In fact, alteration in miR expression may be associated with tumor suppression, tumorigenesis, metastasis, and poor prognosis in human breast cancer (BC).
  
  
  OBJECTIVE
  The aim of this clinical experimental study was to measure the miR-328 expression level in breast cancer tissues, at first. Then, we tried to find out any possible correlation between miR-328 and prognostic and predictive biomarkers in BC. Both of these two objectives were investigated for the first time; and we did not find any similar survey measuring the expression level of miR-328 in both tumor and non-tumor breast tissues. This research was conducted in Iran (Ahvaz, Khuzestan), between December 2013 and April 2014. Furthermore, we did not find any previous document investigating the correlation between miR-328 expression level and prognostic factors in BC. Due to the lack of similar studies intending to measure the expression level of miR-328 in tumor and adjacent non-tumor tissues, we decided to carry out a pilot study.
  
  
  METHODS
  We measured the expression level of miR-328 by Poly (A) real-time PCR based on SYBR Green-I in 28 fresh samples of BC tissues and 28 samples of normal adjacent tissues, including invasive ductal carcinoma (IDC), invasive lobular carcinoma (ILC), and ductal carcinoma in situ (DCIS). We tried to attribute the results to clinicopathologic features such as status of estrogen and progesterone receptors (ER/PR), HER2/neu (HER2), P53 and also Ki67 labeling (Ki67-LI).
  
  
  RESULTS
  The results showed that the miR-328 median level of expression was 0.88 (2-ΔΔCt) (25th-75thpercentile, 0.07 - 2.34). It means that the expression level increased in tumor tissues compared to normal adjacent tissues (NATs). However, a statistically significant correlation between the miR-328 median expression level and prognostic factors, including pathologic diagnosis, age, and also the status of ER, PR, HER2, and Ki67-LI was not observed (P > 0.05).
  
  
  CONCLUSIONS
  Therefore, it might be possible to consider miR-328 as an oncogene; but not necessarily an oncomiR, in human BC.
authors.affiliation: Department of Medical Genetics, Faculty of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.
authors.forename: Alihossein
authors.initials: A
authors.lastname: Saberi
authors.affiliation: Department of Medical Physics, Faculty of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.
authors.forename: Amir
authors.initials: A
authors.lastname: Danyaei
authors.affiliation: Department of Medical Virology, Faculty of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.
authors.forename: Niloofar
authors.initials: N
authors.lastname: Neisi
authors.affiliation: Modeling in Health Research Center, Institute for Futures Studies in Health, Kerman University of Medical Sciences, Kerman, Iran.
authors.forename: Maryam
authors.initials: M
authors.lastname: Dastoorpoor
authors.affiliation: Department of Medical Physics, Faculty of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.
authors.forename: Mohammad Javad
authors.initials: MJ
authors.lastname: Tahmasbi Birgani
keywords: Biomarkers; Breast Carcinoma; Microrna-328; SYBR Green I Real-Time PCR; oncomir