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Published in: BMC Cancer 1/2021

Open Access 01-12-2021 | Prostate Cancer | Research

Role of miR-182/PDCD4 axis in aggressive behavior of prostate cancer in the African Americans

Authors: Marisa Shiina, Yutaka Hashimoto, Priyanka Kulkarni, Pritha Dasgupta, Varahram Shahryari, Soichiro Yamamura, Yuichiro Tanaka, Rajvir Dahiya

Published in: BMC Cancer | Issue 1/2021

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Abstract

Background

Prostate cancer is one of the most commonly diagnosed cancers among men. African Americans (AA) are at an increased risk of developing prostate cancer compared to European Americans (EA). miRNAs play a critical role in these tumors, leading to tumor progression. In this study, we investigated the role of miR-182 in racial disparity in prostate cancer.

Results

We found significantly increased levels of miR-182 in prostate cancer tissues compared to BPH. Also, miR-182 shows increased expression in AA prostate cancer cell line and tissue samples compared to EA. We performed biochemical recurrence (BCR) - free survival time in AA and EA patients and found that high miR-182 expression had significantly shorter BCR-free survival than patients with low miR-182 expression (P = 0.031). To elucidate the role of miR-182, we knocked down miR-182 in EA (DU-145 and LNCaP) and AA (MDA-PCa-2b) cell lines and found an increase in apoptosis, arrest of the cell cycle, and inhibition of colony formation in the AA cell line to a greater extent than EA cell lines.

Conclusions

Our results showed that PDCD4 is a direct miR-182 target and its inhibition is associated with aggressiveness and high Gleason grade in prostate cancer among AA. These findings show that miR-182 is highly expressed in AA patients and miR-182 may be a target for effective therapy in AA patients.
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Metadata
Title
Role of miR-182/PDCD4 axis in aggressive behavior of prostate cancer in the African Americans
Authors
Marisa Shiina
Yutaka Hashimoto
Priyanka Kulkarni
Pritha Dasgupta
Varahram Shahryari
Soichiro Yamamura
Yuichiro Tanaka
Rajvir Dahiya
Publication date
01-12-2021
Publisher
BioMed Central
Published in
BMC Cancer / Issue 1/2021
Electronic ISSN: 1471-2407
DOI
https://doi.org/10.1186/s12885-021-08723-6

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