Regulation of Let-7a-5p and miR-199a-5p Expression by Akt1 Modulates Prostate Cancer Epithelial-to-Mesenchymal Transition via the Transforming Growth Factor-β Pathway

Abdulrahman Alwhaibi; Varun Parvathagiri; Arti Verma; Sandeep Artham; Mir S Adil; Payaningal R Somanath

doi:10.3390/cancers14071625

Regulation of Let-7a-5p and miR-199a-5p Expression by Akt1 Modulates Prostate Cancer Epithelial-to-Mesenchymal Transition via the Transforming Growth Factor-β Pathway

Cancers (Basel). 2022 Mar 23;14(7):1625. doi: 10.3390/cancers14071625.

Authors

Abdulrahman Alwhaibi^{1

2

3}, Varun Parvathagiri^{1

2}, Arti Verma^{1

2}, Sandeep Artham^{1

2}, Mir S Adil^{1

2}, Payaningal R Somanath^{1

2

4

5}

Affiliations

¹ Clinical and Experimental Therapeutics, University of Georgia, Augusta, GA 30912, USA.
² Charlie Norwood VA Medical Center, Augusta, GA 30912, USA.
³ Clinical Pharmacy Department, College of Pharmacy at King Saud University, Riyadh 11451, Saudi Arabia.
⁴ Vascular Biology Center, Augusta University, Augusta, GA 30912, USA.
⁵ Georgia Cancer Center, Augusta University, Augusta, GA 30912, USA.

Abstract

Akt1 suppression in advanced cancers has been indicated to promote metastasis. Our understanding of how Akt1 orchestrates this is incomplete. Using the NanoString^®-based miRNA and mRNA profiling of PC3 and DU145 cells, and subsequent data analysis using the DIANA-mirPath, dbEMT, nCounter, and Ingenuity^® databases, we identified the miRNAs and associated genes responsible for Akt1-mediated prostate cancer (PCa) epithelial-to-mesenchymal transition (EMT). Akt1 loss in PC3 and DU145 cells primarily induced changes in the miRNAs and mRNAs regulating EMT genes. These include increased miR-199a-5p and decreased let-7a-5p expression associated with increased TGFβ-R1 expression. Treatment with locked nucleic acid (LNA) miR-199a-5p inhibitor and/or let-7a-5p mimic induced expression changes in EMT genes correlating to their anticipated effects on PC3 and DU145 cell motility, invasion, and TGFβ-R1 expression. A correlation between increased miR-199a-5p and TGFβ-R1 expression with reduced let-7a-5p was also observed in high Gleason score PCa patients in the cBioportal database analysis. Collectively, our studies show the effect of Akt1 suppression in advanced PCa on EMT modulating miRNA and mRNA expression changes and highlight the potential benefits of miR-199a-5p and let-7a-5p in therapy and/or early screening of mPCa.

Keywords: Akt1; epithelial-to-mesenchymal transition; let-7a-5p; miR-199a-5p; prostate cancer.

Grants and funding

UL1TR002378/TR/NCATS NIH HHS/United States