Determination of miRNA expression profile in patients with prostate cancer and benign prostate hyperplasia.

BACKGROUND

It is a known fact that the role of microRNAs (miRNA) has a very important place in cancer development and progression. miRNAs target a significant part of pathways as well as genes. This study aimed to compare the differential expression profiles of miRNAs in prostate cancer and benign prostatic hyperplasia patients.

METHODS

Peripheral blood mononuclear cells (PBMCs) and tissue samples were collected from prostate cancer (PCa) (n: 20) and benign prostatic hyperplasia (BPH) (n: 20) patients. Total RNA isolation was performed. As a result of the RNA concentration and purity measurement, each patient group was pooled, and the miRNAs profiles comparison was performed with the Affymetrix Microarray System.

RESULTS

In tissue samples, 37 different expressed miRNAs were identified in PCa patients compared to BPH patients. In PBMCs samples, 27 different expressed miRNAs were identified in PCa patients compared to benign prostatic hyperplasia patients. As a result of the comparison of tissue and PBMCs samples, it was determined that down regülated hsa-miR-494-3p, hsa-miR-3128, hsa-miR-8084 were common miRNAs. 3 (HIF1A, NHS,INSL4) targets identified for hsa-miR-494-3p, 2 (HIF1A, AVRP1A) for hsa-miR-3128, 3 (AVRP1A, NHS, INSL4) for hsa-miR-8084.

DISCUSSION

Our results suggested that determined common hsa-miR-494-3p, hsa-miR-3128, hsa-miR-8084 and their target HIF1A, AVRP1A, NHS, INSL4 may play a crucial role in therapeutic and early diagnostic strategies for prostate cancer. The present study may represent the first in-depth analysis of PBMCs and tissue samples miRNA profiles.