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Akagi R, Kubo T, Hatori Y, Miyamoto T, Inouye S. Heme oxygenase-1 induction by heat shock in rat hepatoma cell line is regulated by the coordinated function of HSF1, NRF2, AND BACH1. J Biochem 2021; 170:501-510. [PMID: 34061198 DOI: 10.1093/jb/mvab065] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2021] [Accepted: 05/25/2021] [Indexed: 11/12/2022] Open
Abstract
The mechanism of heme oxygenase-1 (HO-1) induction by heat shock (HS) loading remains unclear. Here, we investigated the contribution of transcription factors to HS-induced HO-1 expression, using a rat hepatoma cell line (H-4-II-E). Our results demonstrated that HS treatment resulted in a marked induction of HO-1. Immunohistochemical analysis showed a slight mismatch in the expression levels of HO-1 and HSP70 by HS among cells, suggesting a conflict between multiple induction mechanisms. We observed HS-induced nuclear localization of, not only phosphorylated HSF1, but also NRF2, which is a typical transcription factor activated by oxidative stress. HSF1 knockdown in H-4-II-E markedly reduced HO-1 induction by HS, while NRF2 knockdown resulted in a partial effect. The chromatin immunoprecipitation assay demonstrated that HS loading resulted in significant binding of HSF1 to the HSE in the promoter proximal region of HO-1 gene and another HSE located close to the MARE in the -4 kb upstream enhancer region 1, where NRF2 also bound, together with BACH1, a negative transcription factor of HO-1. These observations indicate that HO-1 induction by HS is mainly mediated by HSF1 binding to the proximal HSE. NRF2 binding to MARE by HS is predominantly suppressed by an increased binding of BACH1.
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Affiliation(s)
- Reiko Akagi
- Department of Pharmacy, Faculty of Pharmacy, Yasuda Women's University, 6-13-1 Yasuhigashi, Asaminami-ku, Hiroshima 731-0153, Japan
| | - Takanori Kubo
- Department of Pharmacy, Faculty of Pharmacy, Yasuda Women's University, 6-13-1 Yasuhigashi, Asaminami-ku, Hiroshima 731-0153, Japan
| | - Yuta Hatori
- Department of Pharmacy, Faculty of Pharmacy, Yasuda Women's University, 6-13-1 Yasuhigashi, Asaminami-ku, Hiroshima 731-0153, Japan
| | - Takafumi Miyamoto
- Department of Internal Medicine (Endocrinology and Metabolism), Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba-City, Ibaraki 305-8575, Japan
| | - Sachiye Inouye
- Department of Pharmacy, Faculty of Pharmaceutical Sciences, Sanyo-Onoda City University 1-1-1 Daigakudohri, Sanyo-onoda-shi 756-0884, Japan
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Kubo T, Nishimura Y, Sato Y, Yanagihara K, Seyama T. Sixteen Different Types of Lipid-Conjugated siRNAs Containing Saturated and Unsaturated Fatty Acids and Exhibiting Enhanced RNAi Potency. ACS Chem Biol 2021; 16:150-164. [PMID: 33346648 DOI: 10.1021/acschembio.0c00847] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
SiRNAs are strong gene-silencing agents that function in a target sequence-specific manner. Although siRNAs might one day be used in therapy for intractable diseases such as cancers, a number of problems with siRNAs must first be overcome. In this study, we developed 16 different types of lipid-conjugated siRNAs (lipid-siRNAs) that could effectively inhibit the expression of target genes. We determined the hybridization properties, cellular uptake efficacies, and RNAi potencies of the resulting lipid-siRNAs. The lipid-siRNAs exhibited a mild interaction with Lipofectamine RNAiMAX (LFRNAi) as a transfection reagent, and a high membrane permeability was observed in all lipid-siRNAs-LFRNAi complexes; the conjugate siRNAs composed of 16-18 carbon chains as fatty acids showed an especially good cellular uptake efficacy. The in vitro RNAi effect of lipid-siRNAs targeted to a β-catenin gene exhibited a strong RNAi potency compared with those of unmodified siRNAs. In particular, the conjugate siRNAs composed of 16-18 carbon chains as fatty acids showed excellent RNAi potencies with prolonged effectivities. Interestingly, the RNAi potencies of conjugate siRNAs containing 18 carbon chains with a trans-form (elaidic acid and trans-vaccenic acid) were inferior to those of the carbon chains with a cis-form (oleic acid and cis-vaccenic acid). These lipid-siRNAs can solve the many problems hindering the clinical application of siRNAs.
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Affiliation(s)
| | | | | | - Kazuyoshi Yanagihara
- Exploratory Oncology Research & Clinical Trial Center, National Cancer Center, Chiba 277-8577, Japan
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Kubo T, Nishimura Y, Hatori Y, Akagi R, Mihara K, Yanagihara K, Seyama T. Antitumor effect of palmitic acid‐conjugated Dsi
RNA
for colon cancer in a mouse subcutaneous tumor model. Chem Biol Drug Des 2019; 93:570-581. [DOI: 10.1111/cbdd.13454] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2018] [Accepted: 12/07/2018] [Indexed: 12/11/2022]
Affiliation(s)
- Takanori Kubo
- Department of Life ScienceFaculty of PharmacyYasuda Women's University Hiroshima Japan
| | - Yoshio Nishimura
- Department of Life ScienceFaculty of PharmacyYasuda Women's University Hiroshima Japan
| | - Yuta Hatori
- Department of Life ScienceFaculty of PharmacyYasuda Women's University Hiroshima Japan
| | - Reiko Akagi
- Department of Life ScienceFaculty of PharmacyYasuda Women's University Hiroshima Japan
| | - Keichiro Mihara
- Department of Hematology and OncologyResearch Institute for Radiation Biology and MedicineHiroshima University Hiroshima Japan
| | - Kazuyoshi Yanagihara
- Exploratory Oncology Research & Clinical Trial CenterNational Cancer Center Kashiwa Chiba Japan
| | - Toshio Seyama
- Department of Life ScienceFaculty of PharmacyYasuda Women's University Hiroshima Japan
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4
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Shah SS, Cultrara CN, Kozuch SD, Patel MR, Ramos JA, Samuni U, Zilberberg J, Sabatino D. Direct Transfection of Fatty Acid Conjugated siRNAs and Knockdown of the Glucose-Regulated Chaperones in Prostate Cancer Cells. Bioconjug Chem 2018; 29:3638-3648. [PMID: 30235926 DOI: 10.1021/acs.bioconjchem.8b00580] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The emerging field of RNAi nanotechnology has led to rapid advances in the applications of siRNAs in chemical biology, medicinal chemistry, and biotechnology. In our RNAi approach, bioconjugation of linear, V-, and Y-shaped RNA templates were designed using a series of saturated and unsaturated fatty acids to improve cell uptake and knockdown efficacy of the oncogenic glucose regulated proteins (GRPs) in prostate (PC-3) cancer cells. An optimized HCTU-coupling procedure was developed for tagging variable saturated and unsaturated fatty acids onto the 5'-ends of linear and V-shaped RNA templates that were constructed by semiautomated solid phase RNA synthesis. Hybridization and self-assembly of complementary strands yielded linear, V-, and Y-shaped fatty acid-conjugated siRNAs which were characterized by native PAGE. CD spectroscopy confirmed their A-type helix conformations. RP IP HPLC provided trends in amphiphilic properties, whereas DLS and TEM confirmed multicomponent self-assembled structures that were prone to aggregation. Subsequently, the fatty acid conjugated siRNA bioconjugates were tested for their RNAi activity by direct transfection within PC-3 cells known to overexpress oncogenic GRP activity. The siRNA bioconjugates with sense strand modifiers provided more potent GRP knockdown relative to the antisense modified siRNAs, but to a lesser extent when compared to the unconjugated siRNA controls that were transfected with the commercial Trans-IT X2 dynamic delivery system. Flow cytometry revealed that the latter may be at least in part attributed to limited cell uptake of the fatty acid conjugated siRNAs. Nonetheless, these new constructs represent an entry point in modifying higher-order siRNA constructs that may lead to the generation of more efficient siRNA bioconjugates for screening important oncogene targets and for cancer gene therapy applications.
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Affiliation(s)
- Sunil S Shah
- Department of Chemistry and Biochemistry , Seton Hall University , South Orange , New Jersey 07079 , United States
| | - Christopher N Cultrara
- Department of Chemistry and Biochemistry , Seton Hall University , South Orange , New Jersey 07079 , United States
| | - Stephen D Kozuch
- Department of Chemistry and Biochemistry , Seton Hall University , South Orange , New Jersey 07079 , United States
| | - Mayurbhai R Patel
- Nitto Denko Avecia Inc. , 8560 Reading Road , Cincinnati , Ohio 45215 , United States
| | - Jorge A Ramos
- Department of Chemistry and Biochemistry , Queens College, City University of New York , Flushing , New York 11367 , United States.,Ph.D. Programs in Biochemistry and Chemistry , The Graduate Center of the City University of New York , New York , New York 10016 , United States
| | - Uri Samuni
- Department of Chemistry and Biochemistry , Queens College, City University of New York , Flushing , New York 11367 , United States.,Ph.D. Programs in Biochemistry and Chemistry , The Graduate Center of the City University of New York , New York , New York 10016 , United States
| | - Jenny Zilberberg
- Department of Biomedical Research , Hackensack University Medical Center , 40 Prospect Avenue , Hackensack , New Jersey 07601 , United States
| | - David Sabatino
- Department of Chemistry and Biochemistry , Seton Hall University , South Orange , New Jersey 07079 , United States
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5
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Kubo T, Yanagihara K, Seyama T. In VivoRNAi Efficacy of Palmitic Acid-Conjugated Dicer-Substrate siRNA in a Subcutaneous Tumor Mouse Model. Chem Biol Drug Des 2016; 87:811-23. [DOI: 10.1111/cbdd.12720] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2015] [Revised: 12/11/2015] [Accepted: 12/30/2015] [Indexed: 12/19/2022]
Affiliation(s)
- Takanori Kubo
- Laboratory of Molecular Cell Biology; Department of Life Sciences; Faculty of Pharmacy; Yasuda Women's University; 6-13-1 Yasuhigashi, Asaminami-ku Hiroshima 731-0153 Japan
| | - Kazuyoshi Yanagihara
- Exploratory Oncology Research & Clinical Trial Center; National Cancer Center; 6-5-1 Kashiwanoha, Kashiwa Chiba Japan
| | - Toshio Seyama
- Laboratory of Molecular Cell Biology; Department of Life Sciences; Faculty of Pharmacy; Yasuda Women's University; 6-13-1 Yasuhigashi, Asaminami-ku Hiroshima 731-0153 Japan
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Kubo T, Yanagihara K, Sato Y, Nishimura Y, Kondo S, Seyama T. Gene-Silencing Potency of Symmetric and Asymmetric Lipid-Conjugated siRNAs and Its Correlation with Dicer Recognition. Bioconjug Chem 2013; 24:2045-57. [DOI: 10.1021/bc400391n] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Takanori Kubo
- Faculty
of Pharmacy, Yasuda Women’s University, 6-13-1 Yasuhigashi, Asaminami-ku, Hiroshima 731-0153, Japan
| | - Kazuyoshi Yanagihara
- Division of Translational
Research, National Cancer Center Research Institute, 6-5-1 Kashiwanoha, Kashiwa, Chiba, Japan
| | - Yuichiro Sato
- Faculty
of Pharmacy, Yasuda Women’s University, 6-13-1 Yasuhigashi, Asaminami-ku, Hiroshima 731-0153, Japan
| | - Yoshio Nishimura
- Faculty
of Pharmacy, Yasuda Women’s University, 6-13-1 Yasuhigashi, Asaminami-ku, Hiroshima 731-0153, Japan
| | - Shinichi Kondo
- Faculty
of Pharmacy, Yasuda Women’s University, 6-13-1 Yasuhigashi, Asaminami-ku, Hiroshima 731-0153, Japan
| | - Toshio Seyama
- Faculty
of Pharmacy, Yasuda Women’s University, 6-13-1 Yasuhigashi, Asaminami-ku, Hiroshima 731-0153, Japan
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