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Self-assembled DNA nanostructure containing oncogenic miRNA-mediated cell proliferation by downregulation of FOXO1 expression
DNA Nanotechnology and Application Laboratory, CSIR-Institute of Minerals and Materials Technology, Bhubaneswar, India; Academy of Scientific and Innovative Research (AcSIR), Uttar Pradesh, Ghaziabad, India.
Umeå University, Faculty of Medicine, Department of Molecular Biology (Faculty of Medicine). DNA Nanotechnology and Application Laboratory, CSIR-Institute of Minerals and Materials Technology, Bhubaneswar, India.
Cancer Biology Laboratory, Institute of Life Sciences, Bhubaneswar, India.
DNA Nanotechnology and Application Laboratory, CSIR-Institute of Minerals and Materials Technology, Bhubaneswar, India; Academy of Scientific and Innovative Research (AcSIR), Uttar Pradesh, Ghaziabad, India.
2022 (English)In: BMC Cancer, E-ISSN 1471-2407, Vol. 22, no 1, article id 1332Article in journal (Refereed) Published
Abstract [en]

FOXO1 transcription factor not only limits the cell cycle progression but also promotes cell death as a tumor suppressor protein. Though the expression of FOXO1 is largely examined in breast cancer, the regulation of FOXO1 by miRNA is yet to be explored. In the current study, self-assembled branched DNA (bDNA) nanostructures containing oncogenic miRNAs were designed and transfected to the MCF7 cell line to decipher the FOXO1 expression. bDNA containing oncogenic miRNAs 27a, 96, and 182 synergistically downregulate the expression of FOXO1 in MCF7 cells. The down-regulation is evident both in mRNA and protein levels suggesting that bDNA having miRNA sequences can selectively bind to mRNA and inhibit translation. Secondly, the downstream gene expression of p21 and p27 was also significantly downregulated in presence of miR-bDNA nanostructures. The cell proliferation activity was progressively increased in presence of miR-bDNA nanostructures which confirms the reduced tumor suppression activity of FOXO1 and the downstream gene expression. This finding can be explored to design novel bDNA structures which can downregulate the tumor suppressor proteins in normal cells and induce cell proliferation activity to identify early-phase markers of cancer.

Place, publisher, year, edition, pages
BioMed Central (BMC), 2022. Vol. 22, no 1, article id 1332
Keywords [en]
Breast cancer, DNA nanostructure, FOXO1, MCF7 cell line, miRNAs, P21, P27
National Category
Cancer and Oncology Biochemistry and Molecular Biology
Identifiers
URN: urn:nbn:se:umu:diva-202070DOI: 10.1186/s12885-022-10423-8ISI: 000901744400006PubMedID: 36539739Scopus ID: 2-s2.0-85144301110OAI: oai:DiVA.org:umu-202070DiVA, id: diva2:1723502
Available from: 2023-01-03 Created: 2023-01-03 Last updated: 2024-07-04Bibliographically approved

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Kumari, Kanchan

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