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Jin H, Kim MG, Ko SB, Kim DH, Lee BJ, Macgregor RB, Shim G, Oh YK. Stemmed DNA nanostructure for the selective delivery of therapeutics. Nanoscale 2018; 10:7511-7518. [PMID: 29637946 DOI: 10.1039/c7nr08558c] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
DNA has emerged as a biocompatible biomaterial that may be considered for various applications. Here, we report tumor cell-specific aptamer-modified DNA nanostructures for the specific recognition and delivery of therapeutic chemicals to cancer cells. Protein tyrosine kinase (PTK)7-specific DNA aptamer sequences were linked to 15 consecutive guanines. The resulting aptamer-modified product, AptG15, self-assembled into a Y-shaped structure. The presence of a G-quadruplex at AptG15 was confirmed by circular dichroism and Raman spectroscopy. The utility of AptG15 as a nanocarrier of therapeutics was tested by loading the photosensitizer, methylene blue (MB), to the G-quadruplex as a model drug. The generated MB-loaded AptG15 (MB/AptG15) showed specific and enhanced uptake to CCRF-CEM cells, which overexpress PTK7, compared with Ramos cells, which lack PTK7, or CCRF-CEM cells treated with a PTK7-specific siRNA. The therapeutic activity of MB/AptG15 was tested by triggering its photodynamic effects. Upon 660 nm light irradiation, MB/AptG15 showed greater reactive oxygen species generation and anticancer activity in PTK7-overexpressing cells compared to cells treated with MB alone, those treated with AptG15, and other comparison groups. AptG15 stemmed DNA nanostructures have significant potential for the cell-type-specific delivery of therapeutics, and possibly for the molecular imaging of target cells.
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Affiliation(s)
- H Jin
- College of Pharmacy and Research Institute of Pharmaceutical Sciences, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea.
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Shim G, Miao W, Ko S, Park GT, Kim JY, Kim MG, Kim YB, Oh YK. Immune-camouflaged graphene oxide nanosheets for negative regulation of phagocytosis by macrophages. J Mater Chem B 2017; 5:6666-6675. [PMID: 32264429 DOI: 10.1039/c7tb00648a] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Signal regulatory protein alpha (SIRPα) is highly expressed in macrophages of the reticuloendothelial system and in tumor-associated macrophages, whereas tumor cells express the surface membrane protein, CD47, which interacts with SIRPα to negatively regulate phagocytosis. In this study, we modified the surfaces of graphene oxide (GO) nanosheets with a CD47-like SIRPα-binding peptide (SP). The presence of SP on GO nanosheets reduced the macrophage uptake to a greater extent than the PEGylation of such nanosheets. This reduced uptake was found to be mediated by the activation of Src homology region 2 domain-containing phosphatase 1 (SHP-1) and the downstream inhibition of myosin assembly, which is necessary for phagosome formation. Unlike SP-coated GO nanosheets, PEGylated GO nanosheets did not affect myosin assembly or phagocytosis. After in vivo systemic administration, the clearance of SP-coated GO nanosheets was slower than that of PEGylated GO nanosheets, and this difference increased with repeated administration. Finally, SP-coated GO nanosheets showed a higher distribution to tumor tissues than PEGylated GO nanosheets or a physical mixture of SP and GO nanosheets. Our findings indicate that immune-camouflaged GO nanosheets with natural CD47-like SIRPα-binding molecules can reduce the nonspecific loss of such nanosheets through macrophage uptake, thereby enhancing their blood circulation and tumor delivery after multiple injections.
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Affiliation(s)
- G Shim
- College of Pharmacy and Research Institute of Pharmaceutical Sciences, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea.
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M'kacher R, Girinsky T, Colicchio B, Ricoul M, Dieterlen A, Jeandidier E, Heidingsfelder L, Cuceu C, Shim G, Frenzel M, Lenain A, Morat L, Bourhis J, Hempel WM, Koscielny S, Paul JF, Carde P, Sabatier L. Telomere shortening: a new prognostic factor for cardiovascular disease post-radiation exposure. Radiat Prot Dosimetry 2015; 164:134-137. [PMID: 25274533 DOI: 10.1093/rpd/ncu296] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Telomere length has been proposed as a marker of mitotic cell age and as a general index of human organism aging. Telomere shortening in peripheral blood lymphocytes has been linked to cardiovascular-related morbidity and mortality. The authors investigated the potential correlation of conventional risk factors, radiation dose and telomere shortening with the development of coronary artery disease (CAD) following radiation therapy in a large cohort of Hodgkin lymphoma (HL) patients. Multivariate analysis demonstrated that hypertension and telomere length were the only independent risk factors. This is the first study in a large cohort of patients that demonstrates significant telomere shortening in patients treated by radiation therapy who developed cardiovascular disease. Telomere length appears to be an independent prognostic factor that could help determine patients at high risk of developing CAD after exposure in order to implement early detection and prevention.
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Affiliation(s)
- R M'kacher
- Laboratory of Radiobiology and Oncology, CEA, DSV/iRCM, Fontenay-aux-Roses 92265, France Laboratory of Radiation Sensitivity and Radio-carcinogenesis INSERM 1030, Institut Gustave Roussy, Villejuif 94 804, France
| | - T Girinsky
- Department of Radiation Oncology, Institut Gustave Roussy, Villejuif 94 804, France
| | - B Colicchio
- Laboratoire MIPS - Groupe TIIM3D, Université de Haute-Alsace, Mulhouse Cedex F-68093, France
| | - M Ricoul
- Laboratory of Radiobiology and Oncology, CEA, DSV/iRCM, Fontenay-aux-Roses 92265, France
| | - A Dieterlen
- Laboratoire MIPS - Groupe TIIM3D, Université de Haute-Alsace, Mulhouse Cedex F-68093, France
| | - E Jeandidier
- Department of genetics, CHU, Mulhouse Cedex 68093, France
| | - L Heidingsfelder
- MetaSystems GmbH, Robert-Bosch-Str. 6, Altlussheim D-68804, Germany
| | - C Cuceu
- Laboratory of Radiobiology and Oncology, CEA, DSV/iRCM, Fontenay-aux-Roses 92265, France
| | - G Shim
- Laboratory of Radiobiology and Oncology, CEA, DSV/iRCM, Fontenay-aux-Roses 92265, France
| | - M Frenzel
- Laboratory of Radiobiology and Oncology, CEA, DSV/iRCM, Fontenay-aux-Roses 92265, France Laboratory of Radiation Sensitivity and Radio-carcinogenesis INSERM 1030, Institut Gustave Roussy, Villejuif 94 804, France Department of Radiation Oncology, Institut Gustave Roussy, Villejuif 94 804, France Laboratoire MIPS - Groupe TIIM3D, Université de Haute-Alsace, Mulhouse Cedex F-68093, France Department of genetics, CHU, Mulhouse Cedex 68093, France MetaSystems GmbH, Robert-Bosch-Str. 6, Altlussheim D-68804, Germany Biostatistics and Epidemiology Unit, Institut Gustave Roussy, Villejuif 94 804, France Department of Radiology, Marie Lannelongue, Chatenay-Malabry 92019, France Department of hematology, Institut Gustave Roussy, Villejuif 94 804, France
| | - A Lenain
- Laboratory of Radiobiology and Oncology, CEA, DSV/iRCM, Fontenay-aux-Roses 92265, France
| | - L Morat
- Laboratory of Radiobiology and Oncology, CEA, DSV/iRCM, Fontenay-aux-Roses 92265, France
| | - J Bourhis
- Laboratory of Radiation Sensitivity and Radio-carcinogenesis INSERM 1030, Institut Gustave Roussy, Villejuif 94 804, France Department of Radiation Oncology, Institut Gustave Roussy, Villejuif 94 804, France Laboratoire MIPS - Groupe TIIM3D, Université de Haute-Alsace, Mulhouse Cedex F-68093, France Department of genetics, CHU, Mulhouse Cedex 68093, France
| | - W M Hempel
- Laboratory of Radiobiology and Oncology, CEA, DSV/iRCM, Fontenay-aux-Roses 92265, France
| | - S Koscielny
- Biostatistics and Epidemiology Unit, Institut Gustave Roussy, Villejuif 94 804, France
| | - J F Paul
- Department of Radiology, Marie Lannelongue, Chatenay-Malabry 92019, France
| | - P Carde
- Department of hematology, Institut Gustave Roussy, Villejuif 94 804, France
| | - L Sabatier
- Laboratory of Radiobiology and Oncology, CEA, DSV/iRCM, Fontenay-aux-Roses 92265, France
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Lee MH, Park H, Shim G, Lee J, Koo HS. Regulation of gene expression, cellular localization, and in vivo function of Caenorhabditis elegans DNA topoisomerase I. Genes Cells 2001; 6:303-12. [PMID: 11318873 DOI: 10.1046/j.1365-2443.2001.00423.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
BACKGROUND DNA topoisomerase I is dispensable in yeast, but is essential during the embryogenesis of Drosophila and mouse. In order to determine functions of the enzyme in the development of Caenorhabditis elegans, phenotypes resulting from the deficiency were observed and correlated with the expression of the gene. RESULTS The transcriptional regulation of the C. elegans DNA topoisomerase I gene was investigated by mRNA localization and reporter gene expression in C. elegans. The mRNA was expressed in the gonad and in the early embryos, followed by a rapid decrease in its level during the late embryonic stage. A reporter gene expression induced by the 5'-upstream DNA sequence appeared at the comma stage of embryos, continued through the L1 larval stage, and began to decrease gradually afterwards. The DNA topoisomerase I protein was immuno-localized in the nuclei of meiotic gonad cells and interphase embryonic cells, and unexpectedly in centrosomes of mitotic embryonic cells. Double-stranded RNA interference of DNA topoisomerase I gene expression resulted in pleiotropic phenotypes showing abnormal gonadogenesis, oocyte development and embryogenesis. CONCLUSION These phenotypes, along with expressional regulations, demonstrate that DNA topoisomerase I plays important roles in rapidly growing germ cells and embryonic cells.
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Affiliation(s)
- M H Lee
- Department of Biochemistry, College of Science, Yonsei University, Seoul 120-749, Korea
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Agui T, Xin X, Cai Y, Shim G, Muramatsu Y, Yamada T, Fujiwara H, Matsumoto K. Opposite actions of transforming growth factor-beta 1 on the gene expression of atrial natriuretic peptide biological and clearance receptors in a murine thymic stromal cell line. J Biochem 1995; 118:500-7. [PMID: 8690708 DOI: 10.1093/oxfordjournals.jbchem.a124936] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
The regulation of the gene expression of the atrial natriuretic peptide receptor (ANPR) subtypes, ANPR-A, ANPR-B, and ANPR-C, was investigated in a murine thymic stromal cell line, MRL 104.8a. When MRL 104.8a cells were cultured with transforming growth factor (TGF)-beta1, [125I]ANP binding sites increased with increasing dose of TGF-beta1. These binding sites were identified as ANPR-C by a displacement experiment with ANPR-C-specific ligand, C-ANF, and by the affinity cross-linking of the [125I]ANP binding sites with a chemical cross-linker to determine the molecular weight of the ANPR. This augmentation of the ANPR-C expression was elucidated to occur at the transcriptional level by Northern blot experiment, comparison of the relative amounts of mRNA by reverse transcription (RT)-PCR, and in vitro nuclear transcription assay. Conversely, the expression of the ANP biological receptors, ANPR-A and ANPR-B, was shown to be down-regulated by TGF-beta1. These data suggest that TGF-beta1 regulates the gene expression of ANPRs in the thymic stromal cells and that ANP and TGF-beta1 might affect the thymic stromal cell functions.
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Affiliation(s)
- T Agui
- Institute for Experimental Animal Science, Nagoya City University Medical School, Aichi
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