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Nohira N, Shinji S, Nakamura S, Nihashi Y, Shimosato T, Takaya T. Myogenetic Oligodeoxynucleotides as Anti-Nucleolin Aptamers Inhibit the Growth of Embryonal Rhabdomyosarcoma Cells. Biomedicines 2022; 10:2691. [PMID: 36359210 PMCID: PMC9687923 DOI: 10.3390/biomedicines10112691] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Revised: 10/17/2022] [Accepted: 10/21/2022] [Indexed: 09/29/2023] Open
Abstract
Embryonal rhabdomyosarcoma (ERMS) is the muscle-derived tumor retaining myogenic ability. iSN04 and AS1411, which are myogenetic oligodeoxynucleotides (myoDNs) serving as anti-nucleolin aptamers, have been reported to inhibit the proliferation and induce the differentiation of myoblasts. The present study investigated the effects of iSN04 and AS1411 in vitro on the growth of multiple patient-derived ERMS cell lines, ERMS1, KYM1, and RD. RT-PCR and immunostaining revealed that nucleolin was abundantly expressed and localized in nucleoplasm and nucleoli in all ERMS cell lines, similar to myoblasts. Both iSN04 and AS1411 at final concentrations of 10-30 μM significantly decreased the number of all ERMS cells; however, their optimal conditions were different among the cell lines. In all ERMS cell lines, iSN04 at a final concentration of 10 μM markedly reduced the ratio of EdU+ cells, indicating the inhibition of cell proliferation. Quantitative RT-PCR or immunostaining of phosphorylated histone H3 and myosin heavy chain demonstrated that iSN04 suppressed the cell cycle and partially promoted myogenesis but did not induce apoptosis in ERMS cells. Finally, both iSN04 and AS1411 at final concentrations of 10-30 μM disrupted the formation and outgrowth of RD tumorspheres in three-dimensional culture mimicking in vivo tumorigenesis. In conclusion, ERMS cells expressed nucleolin, and their growth was inhibited by the anti-nucleolin aptamers, iSN04 and AS1411, which modulates several cell cycle-related and myogenic gene expression. The present study provides evidence that anti-nucleolin aptamers can be used as nucleic acid drugs for chemotherapy against ERMS.
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Affiliation(s)
- Naoki Nohira
- Department of Agricultural and Life Sciences, Faculty of Agriculture, Shinshu University, 8304 Minami-minowa, Kami-ina, Nagano 399-4598, Japan
| | - Sayaka Shinji
- Department of Agriculture, Graduate School of Science and Technology, Shinshu University, 8304 Minami-minowa, Kami-ina, Nagano 399-4598, Japan
| | - Shunichi Nakamura
- Department of Agriculture, Graduate School of Science and Technology, Shinshu University, 8304 Minami-minowa, Kami-ina, Nagano 399-4598, Japan
| | - Yuma Nihashi
- Cellular and Molecular Biotechnology Research Institute, National Institute of Advanced Industrial Science and Technology, Central 5-41, 1-1-1 Higashi, Tsukuba 305-8565, Japan
| | - Takeshi Shimosato
- Department of Agricultural and Life Sciences, Faculty of Agriculture, Shinshu University, 8304 Minami-minowa, Kami-ina, Nagano 399-4598, Japan
- Department of Agriculture, Graduate School of Science and Technology, Shinshu University, 8304 Minami-minowa, Kami-ina, Nagano 399-4598, Japan
- Department of Biomolecular Innovation, Institute for Biomedical Sciences, Shinshu University, 8304 Minami-minowa, Kami-ina, Nagano 399-4598, Japan
| | - Tomohide Takaya
- Department of Agricultural and Life Sciences, Faculty of Agriculture, Shinshu University, 8304 Minami-minowa, Kami-ina, Nagano 399-4598, Japan
- Department of Agriculture, Graduate School of Science and Technology, Shinshu University, 8304 Minami-minowa, Kami-ina, Nagano 399-4598, Japan
- Department of Biomolecular Innovation, Institute for Biomedical Sciences, Shinshu University, 8304 Minami-minowa, Kami-ina, Nagano 399-4598, Japan
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Woo HH, Chambers SK. Human ALKBH3-induced m 1A demethylation increases the CSF-1 mRNA stability in breast and ovarian cancer cells. BIOCHIMICA ET BIOPHYSICA ACTA-GENE REGULATORY MECHANISMS 2018; 1862:35-46. [PMID: 30342176 DOI: 10.1016/j.bbagrm.2018.10.008] [Citation(s) in RCA: 76] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2018] [Revised: 10/08/2018] [Accepted: 10/12/2018] [Indexed: 12/19/2022]
Abstract
In ovarian and breast cancers, the actions of the cytokine CSF-1 lead to poor prognosis. CSF-1 expression can be regulated post-transcriptionally. RNA methylation is another layer of posttranscriptional regulation. The methylation of N1 atom of adenine (m1A) results in a conformational change of RNA which regulates translational efficiency. Our study indicates that the m1A is also involved in the CSF-1 mRNA decay. The alteration of ALKBH3 expression, an m1A demethylase, regulates the CSF-1 mRNA stability. Demethylation of m1A by ALKBH3 increases the half-life of CSF-1 mRNA without affecting the translation efficiency. The m1A in CSF-1 mRNA is mapped in the 5'UTR near the translation initiation site. YTHDF2, a known m6A reader which interacts with the CCR4-NOT deadenylation complex, is not the reader of m1A-containing CSF-1 mRNA. Overexpression of ALKBH3 increases CSF-1 expression and the degree of cancer cell invasiveness without affecting cell proliferation or migration. Collectively, we showed that CSF-1 mRNA decay can be regulated at an epigenetic level, and that alteration of the N1‑methylation status leads to phenotypic changes in cancer cell behavior.
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Affiliation(s)
- Ho-Hyung Woo
- The University of Arizona Cancer Center, Tucson, AZ 85724, USA.
| | - Setsuko K Chambers
- The University of Arizona Cancer Center, Tucson, AZ 85724, USA; Department of Obstetrics and Gynecology, College of Medicine, The University of Arizona, Tucson, AZ 85724, USA
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