1
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Jeon JH, Park JH, Kim TI. Phenylboronic acid-conjugated cationic methylcellulose for hepatocellular carcinoma-targeted drug/gene co-delivery systems. J IND ENG CHEM 2019. [DOI: 10.1016/j.jiec.2019.03.016] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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2
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Tammam SN, Azzazy HM, Lamprecht A. The effect of nanoparticle size and NLS density on nuclear targeting in cancer and normal cells; impaired nuclear import and aberrant nanoparticle intracellular trafficking in glioma. J Control Release 2017; 253:30-36. [DOI: 10.1016/j.jconrel.2017.02.029] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2016] [Accepted: 02/26/2017] [Indexed: 10/20/2022]
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3
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Bae Y, Rhim HS, Lee S, Ko KS, Han J, Choi JS. Apoptin Gene Delivery by the Functionalized Polyamidoamine Dendrimer Derivatives Induces Cell Death of U87-MG Glioblastoma Cells. J Pharm Sci 2017; 106:1618-1633. [PMID: 28188727 DOI: 10.1016/j.xphs.2017.01.034] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2016] [Revised: 01/18/2017] [Accepted: 01/27/2017] [Indexed: 11/08/2022]
Abstract
Malignant glioma is the most common and aggressive form of primary brain tumor in adults. In this study, we describe the efficacy of nonviral gene delivery carriers, histidine- and arginine- or histidine- and lysine-grafted polyamidoamine (PAMAM) dendrimers (PAMAM-H-R and PAMAM-H-K), in delivering a therapeutic and a tumor-selective killer gene, apoptin, using human glioma cells (U87-MG) and newborn human dermal fibroblast cells. We analyzed transfection efficiency using luciferase and a plasmid DNA encoding for enhanced green fluorescent protein and assessed cell viability in both cells. The results show that transfection efficiency of PAMAM-H-R and PAMAM-H-K was greatly increased compared with that of native PAMAM. Moreover, among PAMAM derivatives, cytotoxicity of PAMAM-H-K was very low. We treated both cells with complexes of PAMAM-H-R or PAMAM-H-K and apoptin and analyzed their cellular uptake by flow cytometry and localization by confocal microscopy. Furthermore, cell cycle distribution, caspase 3 activity assay, and JC-1 analysis showed cell death induced by apoptin in U87-MG cells. The present study demonstrates that a PAMAM-H-R/apoptin complex is an effective gene carrier system in glioma cell culture.
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Affiliation(s)
- Yoonhee Bae
- Department of Physiology, College of Medicine, Cardiovascular and Metabolic Disease Center, Inje University, Busan, Korea
| | - Hyang-Shuk Rhim
- Department of Biomedical Sciences, College of Medicine, The Catholic University of Korea, Seoul, Korea; Department of Medical Life Sciences, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Seulgi Lee
- Department of Biochemistry, College of Natural Sciences, Chungnam National University, Daejeon, Korea
| | - Kyung Soo Ko
- Department of Internal Medicine, Sanggye Paik Hospital, Cardiovascular and Metabolic Disease Center, Inje University, Seoul, Korea
| | - Jin Han
- Department of Physiology, College of Medicine, Cardiovascular and Metabolic Disease Center, Inje University, Busan, Korea.
| | - Joon Sig Choi
- Department of Biochemistry, College of Natural Sciences, Chungnam National University, Daejeon, Korea.
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4
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Bae Y, Green ES, Kim GY, Song SJ, Mun JY, Lee S, Park JI, Park JS, Ko KS, Han J, Choi JS. Dipeptide-functionalized polyamidoamine dendrimer-mediated apoptin gene delivery facilitates apoptosis of human primary glioma cells. Int J Pharm 2016; 515:186-200. [PMID: 27732896 DOI: 10.1016/j.ijpharm.2016.09.083] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2016] [Revised: 09/23/2016] [Accepted: 09/29/2016] [Indexed: 02/07/2023]
Abstract
Glioblastoma multiform (GBM) is the most frequent and aggressive form of brain tumors in adults. However, the development of more efficient and safe nonviral vector gene therapy represents a promising therapeutic approach, using a tumor-specific killer gene, named apoptin. In this study, we describe the efficacy of non-viral gene delivery vectors, the amino acid-conjugated PAMAM derivatives (PAMAM-H-R and PAMAM-H-K) in delivering a therapeutic gene, displaying affinity toward human primary glioma cells (GBL-14 cells) and dermal fibroblasts. We analyzed transfection efficiency, using luciferase (Luci) and a pDNA encoding for enhanced fluorescent protein (EGFP), and cytotoxicity in both cells. The results show that transfection efficiency of PAMAM-H-R improved compared to native PAMAM dendrimer, but cytotoxicity of PAMAM-H-R and PAMAM-H-K were very low. We treated both cells with a polyplex formation of PAMAM-H-R or PAMAM-H-K/apoptin, and analyzed their cellular uptake and localization by flow cytometry and confocal microscopy. Furthermore, we analyzed the endosomal escape effect using TEM images, and found that PAMAM-H-R showed very fast escape from endosome to the cytosol. Caspase 3 activity assay, cell cycle distribution, and JC-1 analysis showed apoptosis induced by apoptin in GBL-14 cells. This indicates that PAMAM-H-R can be a potential nonviral vector gene delivery carrier for brain tumor therapy. The present study demonstrates that PAMAM-H-R/apoptin gene polyplex can be used as an effective therapeutic candidate for GBM due to its selective induction of apoptosis in primary glioma cells as a potential nonviral gene delivery carrier for brain tumor therapy.
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Affiliation(s)
- Yoonhee Bae
- Department of Physiology, College of Medicine, Cardiovascular and Metabolic Disease Center, Inje University, Busan 614-735, Republic of Korea
| | - Eric S Green
- Salt Lake Community College, Salt Lake City, UT, USA
| | - Goo-Young Kim
- Section on Cellular Differentiation, Program on Developmental Endocrinology and Genetics, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD 20892, USA
| | - Su Jeong Song
- Department of Biochemistry, College of Natural Sciences, Chungnam National University, Daejeon 305-764, Republic of Korea
| | - Ji Young Mun
- Department of Biomedical Laboratory Science, College of Health Science, Eulji University, Republic of Korea
| | - Sunray Lee
- Cell Engineering for Origin Research Center 46-21, Susong-dog, Jongno-gu, Seoul 110-140, Republic of Korea
| | - Jong-Il Park
- Chungnam National University School of Medicine, Daejeon 301-747, Republic of Korea
| | - Jong-Sang Park
- School of Chemistry, Seoul National University, Seoul 151-742, Republic of Korea
| | - Kyung Soo Ko
- Department of Internal Medicine, Sanggye Paik Hospital, Cardiovascular and Metabolic Disease Center, Inje University, Seoul 139-707, Republic of Korea
| | - Jin Han
- Department of Physiology, College of Medicine, Cardiovascular and Metabolic Disease Center, Inje University, Busan 614-735, Republic of Korea.
| | - Joon Sig Choi
- Department of Biochemistry, College of Natural Sciences, Chungnam National University, Daejeon 305-764, Republic of Korea.
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5
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Tammam SN, Azzazy HME, Lamprecht A. How successful is nuclear targeting by nanocarriers? J Control Release 2016; 229:140-153. [PMID: 26995759 DOI: 10.1016/j.jconrel.2016.03.022] [Citation(s) in RCA: 72] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2015] [Revised: 03/12/2016] [Accepted: 03/14/2016] [Indexed: 12/22/2022]
Abstract
The nucleus is ultimately the final target for many therapeutics treating various disorders including cancers, heart dysfunction and brain disorders. Owing to their specialized cell uptake and trafficking mechanisms, nanoparticles (NPs) allow drug targeting where degradation sensitive therapeutics could be delivered to their target tissues and cell in active form and sufficient concentration. However, it has recently become increasingly obvious that cytosolic internalization of a drug molecule does not entail its interaction with its subcellular target and hence careful nanoparticle design and optimization is required to enable nuclear targeting. This review, discusses the barriers to NP nuclear delivery; crossing the cell membrane, endo/lysosomal escape, cytoplasmic trafficking and finally nuclear entry focusing on how NP synthesis and modification could allow for bypassing each of the aforementioned barriers and successfully reaching the nucleus. Examples of nuclear targeted NPs are also discussed, stressing on the critical aspects of nuclear targeting and pointing out how the disease state might change the normal NP path and how such change could be exploited to increase efficiency of nuclear targeting. Finally, the criteria set for the evaluation of nanocarriers for nuclear delivery are discussed highlighting that quantitative rather than qualitative evaluation is required to evaluate how successful nanocarriers for nuclear delivery are, particularly with regards to the amount of drug delivered and released in the nucleus.
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Affiliation(s)
- Salma N Tammam
- Laboratory of Pharmaceutical Technology and Biopharmaceutics, University of Bonn, 53121, Germany; Department of Chemistry, The American University in Cairo, 11835, Egypt.
| | - Hassan M E Azzazy
- Department of Chemistry, The American University in Cairo, 11835, Egypt
| | - Alf Lamprecht
- Laboratory of Pharmaceutical Technology and Biopharmaceutics, University of Bonn, 53121, Germany; Laboratory of Pharmaceutical Engineering, University of Franche-Comté, Besançon 25000, France
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6
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Antitumor effect of TRAIL on oral squamous cell carcinoma using magnetic nanoparticle-mediated gene expression. Cell Biochem Biophys 2015; 69:663-72. [PMID: 24563116 DOI: 10.1007/s12013-014-9849-z] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
We developed a new magnetic nanovector to improve the efficiency and targeting of transgene therapy for oral squamous cell carcinoma (OSCC). Positively charged polymer PEI-modified Fe(3)O(4) magnetic nanoparticles were tested as gene transfer vectors in the presence of a magnetic field. The Fe(3)O(4) nanoparticles were prepared by a co-precipitation method and had good dispersibility in water. These nanoparticles modified by PEI were combined with negatively charged pACTERT-EGFP via electrostatic interaction. The transfection efficiency of the magnetic nano-gene vector with the magnetic field was determined by a fluorescence-inverted microscope and flow cytometry. The results showed significant improvement compared with the control group (p < 0.05). The magnetic complexes also exhibited up to 6-times higher transfection efficiency compared with commonly used PEI or lipofectin. On the basis of these results, the antitumor effect with suicide gene therapy using pACTERT-TRAIL in vitro and vivo was evaluated. In vitro apoptosis was determined with the Annexin V-FITC Apoptosis Detection Kit. The results suggested that PEI-modified Fe(3)O(4) nanoparticles could mediate the killing of Tca83 cells. Furthermore, treatment with pACTERT-TRAIL delivered by magnetic nanoparticles showed a significant cytostatic effect through the induction of apoptosis in a xenograft model. This indicates that magnetic nano-gene vectors could improve the transgene efficiency for Tca83 cells and could exhibit antitumor functions with the plasmid pACTERT-TRAIL. This may be a new way to treat OSCC.
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Zhao W, Liu F, Chen Y, Bai J, Gao W. Synthesis of well-defined protein–polymer conjugates for biomedicine. POLYMER 2015. [DOI: 10.1016/j.polymer.2015.03.054] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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8
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Kochneva G, Zonov E, Grazhdantseva A, Yunusova A, Sibolobova G, Popov E, Taranov O, Netesov S, Chumakov P, Ryabchikova E. Apoptin enhances the oncolytic properties of vaccinia virus and modifies mechanisms of tumor regression. Oncotarget 2014; 5:11269-82. [PMID: 25358248 PMCID: PMC4294355 DOI: 10.18632/oncotarget.2579] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2014] [Accepted: 10/08/2014] [Indexed: 12/26/2022] Open
Abstract
A recombinant vaccinia virus VVdGF-ApoS24/2 expressing apoptin selectively kills human cancer cells in vitro [Kochneva et al., 2013]. We compared the oncolytic activity of this recombinant with that of the parental strain L-IVP using a model of human A431 carcinoma xenografts in nude mice. Single intratumoral injections (2×10^7 PFU/mouse) of the viruses produced a dramatic decrease in tumor volumes, which was higher after injection of apoptin-producing virus. The tumor dried out after the injection of recombinant while injection of L-IVP strain resulted in formation of cavities filled with cell debris and liquid. Both viruses rapidly spread in xenografts and replicate exclusively in tumor cells causing their destruction within 8 days. Both viruses induced insignificant level of apoptosis in tumors. Unlike the previously described nuclear localization of apoptin in cancer cells the apoptin produced by recombinant virus was localized to the cytoplasm. The apoptin did not induce a typical apoptosis, but it rather influenced pathway of cell death and thereby caused tumor shrinkage. The replacement of destroyed cells by filamentous material is the main feature of tumor regression caused by the VVdGF-ApoS24/2 virus. The study points the presence of complicated mechanisms of apoptin effects at the background of vaccinia virus replication.
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Affiliation(s)
- Galina Kochneva
- Novosibirsk State University, Novosibirsk, Russia
- State Research Center of Virology and Biotechnology “Vector”, Koltsovo, Russia
| | - Evgeniy Zonov
- Institute of Chemical Biology and Fundamental Medicine, SB RAS, Novosibirsk, Russia
| | | | - Anastasiya Yunusova
- Novosibirsk State University, Novosibirsk, Russia
- Institute of Chemical Biology and Fundamental Medicine, SB RAS, Novosibirsk, Russia
| | - Galina Sibolobova
- State Research Center of Virology and Biotechnology “Vector”, Koltsovo, Russia
| | - Evgeniy Popov
- Novosibirsk State University, Novosibirsk, Russia
- State Research Center of Virology and Biotechnology “Vector”, Koltsovo, Russia
| | - Oleg Taranov
- State Research Center of Virology and Biotechnology “Vector”, Koltsovo, Russia
| | - Sergei Netesov
- Novosibirsk State University, Novosibirsk, Russia
- State Research Center of Virology and Biotechnology “Vector”, Koltsovo, Russia
| | - Peter Chumakov
- Novosibirsk State University, Novosibirsk, Russia
- Engelhardt Institute of Molecular Biology, Moscow
| | - Elena Ryabchikova
- Novosibirsk State University, Novosibirsk, Russia
- Institute of Chemical Biology and Fundamental Medicine, SB RAS, Novosibirsk, Russia
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9
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Serini S, Fasano E, Celleno L, Cittadini A, Calviello G. Potential of long-chain n-3 polyunsaturated fatty acids in melanoma prevention. Nutr Rev 2014; 72:255-66. [PMID: 24665956 DOI: 10.1111/nure.12093] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
The possible antineoplastic activity of dietary long-chain n-3 polyunsaturated fatty acids (LC n-3 PUFAs) has been supported by ample preclinical studies that have identified a number of molecular factors and pathways affected by these fatty acids and involved in cell growth, apoptosis, invasion, and angiogenesis. The aim of this critical review is to assess the current state of knowledge on the potential anticancer effects of LC n-3 PUFAs against malignant melanoma, one of the most common cancers among Western populations. The results of preclinical as well as human observational and interventional studies investigating the effects of LC n-3 PUFAs in melanoma were examined. Overall, the analysis of the literature reveals that, even though a large body of information is available, further effort is needed to identify the main molecular targets of LC n-3 PUFAs in melanoma. Moreover, additional well-designed human observational studies are essential to shed further light on the issue. The results of these studies could provide support and specific information for the development of clinical studies, especially those performed in combination with conventional or innovative antineoplastic therapies.
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Affiliation(s)
- Simona Serini
- Institute of General Pathology, Catholic University, Rome, Italy
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10
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Overexpression of MDA-7/IL-24 as an anticancer cytokine in gene therapy of thyroid carcinoma. JOURNAL OF MEDICAL HYPOTHESES AND IDEAS 2014. [DOI: 10.1016/j.jmhi.2013.06.002] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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11
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The biological activities of protein/oleic acid complexes reside in the fatty acid. BIOCHIMICA ET BIOPHYSICA ACTA-PROTEINS AND PROTEOMICS 2013; 1834:1125-43. [DOI: 10.1016/j.bbapap.2013.02.041] [Citation(s) in RCA: 70] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/16/2013] [Revised: 02/18/2013] [Accepted: 02/20/2013] [Indexed: 12/12/2022]
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12
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Nagaraj S, Mills E, Wong SSC, Truong K. Programming membrane fusion and subsequent apoptosis into mammalian cells. ACS Synth Biol 2013; 2:173-9. [PMID: 23656475 DOI: 10.1021/sb3000468] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
By the delivery of specific natural or engineered proteins, mammalian cells can be programmed to perform increasingly sophisticated and useful functions. Here, we introduce a set of proteins that has potential value in cell-based therapies by programming a cell to target tumor cells. First, the delivery of VSV-G (vesicular stomatitis virus glycoprotein) allowed the cell to undergo membrane fusion with adjacent cells to form syncytia (i.e., a multinucleated cell) in conditions of low pH typically occurring at a tumor site. The formation of syncytia caused the clustering of nuclei along with an integration of the microtubule network and ER. Interestingly, the formation of syncytia between cells that are dynamically blebbing, a mode of migration preferred during tumor metastasis, resulted in the loss of these morphology changes. Lastly, the codelivery of VSV-G with L57R (an engineered photoactivated caspase-7) allowed cells to undergo low pH-dependent membrane fusion followed by blue light-dependent apoptosis. In cell-based therapies, the clearance of syncytia between tumor cells might further trigger an immune response against the tumor.
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Affiliation(s)
- Seema Nagaraj
- Institute
of Biomaterials and Biomedical Engineering, University of Toronto, 164 College Street, Toronto, Ontario, M5S
3G9, Canada
| | - Evan Mills
- Institute
of Biomaterials and Biomedical Engineering, University of Toronto, 164 College Street, Toronto, Ontario, M5S
3G9, Canada
| | - Stanley S. C. Wong
- Institute
of Biomaterials and Biomedical Engineering, University of Toronto, 164 College Street, Toronto, Ontario, M5S
3G9, Canada
| | - Kevin Truong
- Institute
of Biomaterials and Biomedical Engineering, University of Toronto, 164 College Street, Toronto, Ontario, M5S
3G9, Canada
- Edward S. Rogers,
Sr. Department of Electrical and Computer Engineering, University of Toronto, 10 King’s College Circle,
Toronto, Ontario, M5S 3G4, Canada
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13
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An S, Nam K, Choi S, Bai CZ, Lee Y, Park JS. Nonviral gene therapy in vivo with PAM-RG4/apoptin as a potential brain tumor therapeutic. Int J Nanomedicine 2013; 8:821-34. [PMID: 23589689 PMCID: PMC3622651 DOI: 10.2147/ijn.s39072] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Background Glioma is still one of the most complicated forms of brain tumor to remove completely due to its location and the lack of an efficient means to specifically eliminate tumor cells. For these reasons, this study has examined the effectiveness of a nonviral gene therapy approach utilizing a tumor-selective killer gene on a brain tumor xenograft model. Methods and results The therapeutic apoptin gene was recombined into the JDK plasmid and delivered into human brain tumor cells (U87MG) by using a polyamidoamine dendrimer with an arginine surface (PAM-RG4). Studies in vitro showed that the PAM-RG4/apoptin plasmid polyplex exhibited a particularly high transfection activity of .40%. Terminal deoxynucleotidyl transferase dUTP nick end labeling (TUNEL) assay, 4′,6-Diamidino-2-phenylindole (DAPI) TUNEL assay, DAPI staining, and caspase-3 activity assay verified that the tumor cells had undergone apoptosis induced by apoptin. For in vivo studies, the polyplex was injected into tumors, which were induced by injecting U87MG cells intradermally into nude mice. Based on hematoxylin and eosin staining, epidermal growth factor receptor immunohistochemistry results and tumor volume measurement results, tumor growth was effectively inhibited and no specific edema, irritation, or other harm to the skin was observed after polyplex injection. The in vivo expression of apoptin and the induction of apoptosis were verified by reverse-transcription polymerase chain reaction analysis, TUNEL assay, and DAPI staining. Conclusion The PAM-RG4/apoptin gene polyplex is a strong candidate for brain tumor therapeutics because of the synergistic effect of the carrier’s high transfection efficiency (35%–40%) in glioma cells and the selective apoptosis-inducing activity of apoptin in tumor cells.
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Affiliation(s)
- Songhie An
- Department of Chemistry, Seoul National University, Seoul, Republic of Korea
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14
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Lanz HL, Zimmerman RME, Brouwer J, Noteborn MHM, Backendorf C. Mitotic catastrophe triggered in human cancer cells by the viral protein apoptin. Cell Death Dis 2013; 4:e487. [PMID: 23392175 PMCID: PMC3734808 DOI: 10.1038/cddis.2013.2] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Mitotic catastrophe is an oncosuppressive mechanism that senses mitotic failure leading to cell death or senescence. As such, it protects against aneuploidy and genetic instability, and its induction in cancer cells by exogenous agents is currently seen as a promising therapeutic end point. Apoptin, a small protein from Chicken Anemia Virus (CAV), is known for its ability to selectively induce cell death in human tumor cells. Here, we show that apoptin triggers p53-independent abnormal spindle formation in osteosarcoma cells. Approximately 50% of apoptin-positive cells displayed non-bipolar spindles, a 10-fold increase as compared to control cells. Besides, tumor cells expressing apoptin are greatly limited in their progress through anaphase and telophase, and a significant drop in mitotic cells past the meta-to-anaphase transition is observed. Time-lapse microscopy showed that mitotic osteosarcoma cells expressing apoptin displayed aberrant mitotic figures and/or had a prolonged cycling time during mitosis. Importantly, all dividing cells expressing apoptin eventually underwent cell death either during mitosis or during the following interphase. We infer that apoptin can efficiently trigger cell death in dividing human tumor cells through induction of mitotic catastrophe. However, the killing activity of apoptin is not only confined to dividing cells, as the CAV-derived protein is also able to trigger caspase-3 activation and apoptosis in non-mitotic cancer cells.
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Affiliation(s)
- H L Lanz
- Department of Molecular Genetics, Leiden Institute of Chemistry, Leiden University, Leiden, The Netherlands
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15
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Guan GF, Zhao M, Liu LM, Jin CS, Sun K, Zhang DJ, Yu DJ, Cao HW, Lu YQ, Wen LJ. Salmonella typhimurium mediated delivery of Apoptin in human laryngeal cancer. Int J Med Sci 2013; 10:1639-48. [PMID: 24155656 PMCID: PMC3805922 DOI: 10.7150/ijms.6960] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/20/2013] [Accepted: 08/30/2013] [Indexed: 01/26/2023] Open
Abstract
An effective cancer therapeutic should target tumours specifically with limited systemic toxicity. Here, we transformed an attenuated Salmonella typhimurium (S. typhimurium) with an Apoptin expressing plasmid into a human laryngeal carcinoma cell line. The expression of the inserted gene was measured using fluorescence and immunoblotting assays. The attenuated S. typhimurium-mediated Apoptin significantly decreased cytotoxicity and strongly increased cell apoptosis through the activation of caspase-3. The process was mediated by Bax, cytochrome c and caspase-9. A syngeneic nude murine tumour model was used to determine the anti-tumour effects of the recombinant bacteria in vivo. Systemic injection of the recombinant bacteria with and without re-dosing caused significant tumour growth delay and reduced tumour microvessel density, thereby extending host survival. Our findings indicated that the use of recombinant Salmonella typhimurium as an Apoptin expression vector has potential cancer therapeutic benefits.
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Affiliation(s)
- Guo-fang Guan
- 1. Department of Otolaryngology, Head and Neck Surgery, The Second Hospital of Jilin University, Changchun 130041, P. R. China
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16
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Miao L, Zhang K, Qiao C, Jin X, Zheng C, Yang B, Sun H. Antitumor effect of human TRAIL on adenoid cystic carcinoma using magnetic nanoparticle–mediated gene expression. NANOMEDICINE-NANOTECHNOLOGY BIOLOGY AND MEDICINE 2013; 9:141-50. [DOI: 10.1016/j.nano.2012.04.006] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2011] [Revised: 04/06/2012] [Accepted: 04/30/2012] [Indexed: 11/28/2022]
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17
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Ho CS J, Rydström A, Trulsson M, Bålfors J, Storm P, Puthia M, Nadeem A, Svanborg C. HAMLET: functional properties and therapeutic potential. Future Oncol 2012; 8:1301-13. [DOI: 10.2217/fon.12.122] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
Human α-lactalbumin made lethal to tumor cells (HAMLET) is the first member in a new family of protein–lipid complexes that kills tumor cells with high selectivity. The protein component of HAMLET is α-lactalbumin, which in its native state acts as a substrate specifier in the lactose synthase complex, thereby defining a function essential for the survival of lactating mammals. In addition, α-lactalbumin acquires tumoricidal activity after partial unfolding and binding to oleic acid. The lipid cofactor serves the dual role as a stabilizer of the altered fold of the protein and a coactivator of specific steps in tumor cell death. HAMLET is broadly tumoricidal, suggesting that the complex identifies conserved death pathways suitable for targeting by novel therapies. Sensitivity to HAMLET is defined by oncogene expression including Ras and c-Myc and by glycolytic enzymes. Cellular targets are located in the cytoplasmic membrane, cytoskeleton, mitochondria, proteasomes, lysosomes and nuclei, and specific signaling pathways are rapidly activated, first by interactions of HAMLET with the cell membrane and subsequently after HAMLET internalization. Therapeutic effects of HAMLET have been demonstrated in human skin papillomas and bladder cancers, and HAMLET limits the progression of human glioblastomas, with no evidence of toxicity for normal brain or bladder tissue. These findings open up new avenues for cancer therapy and the understanding of conserved death responses in tumor cells.
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Affiliation(s)
- James Ho CS
- Department of Microbiology, Immunology & Glycobiology (MIG), Institute of Laboratory Medicine, Lund University, Sölvegatan 23, S-223 62 Lund, Sweden
| | - Anna Rydström
- Department of Microbiology, Immunology & Glycobiology (MIG), Institute of Laboratory Medicine, Lund University, Sölvegatan 23, S-223 62 Lund, Sweden
| | - Maria Trulsson
- Department of Microbiology, Immunology & Glycobiology (MIG), Institute of Laboratory Medicine, Lund University, Sölvegatan 23, S-223 62 Lund, Sweden
| | - Johannes Bålfors
- Department of Microbiology, Immunology & Glycobiology (MIG), Institute of Laboratory Medicine, Lund University, Sölvegatan 23, S-223 62 Lund, Sweden
| | - Petter Storm
- Department of Microbiology, Immunology & Glycobiology (MIG), Institute of Laboratory Medicine, Lund University, Sölvegatan 23, S-223 62 Lund, Sweden
| | - Manoj Puthia
- Department of Microbiology, Immunology & Glycobiology (MIG), Institute of Laboratory Medicine, Lund University, Sölvegatan 23, S-223 62 Lund, Sweden
| | - Aftab Nadeem
- Department of Microbiology, Immunology & Glycobiology (MIG), Institute of Laboratory Medicine, Lund University, Sölvegatan 23, S-223 62 Lund, Sweden
| | - Catharina Svanborg
- Department of Microbiology, Immunology & Glycobiology (MIG), Institute of Laboratory Medicine, Lund University, Sölvegatan 23, S-223 62 Lund, Sweden
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Human Gyrovirus Apoptin shows a similar subcellular distribution pattern and apoptosis induction as the chicken anaemia virus derived VP3/Apoptin. Cell Death Dis 2012; 3:e296. [PMID: 22495351 PMCID: PMC3358012 DOI: 10.1038/cddis.2012.34] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
The chicken anaemia virus-derived protein Apoptin/VP3 (CAV-Apoptin) has the important ability to induce tumour-selective apoptosis in a variety of human cancer cells. Recently the first human Gyrovirus (HGyV) was isolated from a human skin swab. It shows significant structural and organisational resemblance to CAV and encodes a homologue of CAV-Apoptin/VP3. Using overlapping primers we constructed a synthetic human Gyrovirus Apoptin (HGyV-Apoptin) fused to green fluorescent protein in order to compare its apoptotic function in various human cancer cell lines to CAV-Apoptin. HGyV-Apoptin displayed a similar subcellular expression pattern as observed for CAV-Apoptin, marked by translocation to the nucleus of cancer cells, although it is predominantly located in the cytosol of normal human cells. Furthermore, expression of either HGyV-Apoptin or CAV-Apoptin in several cancer cell lines triggered apoptosis at comparable levels. These findings indicate a potential anti-cancer role for HGyV-Apoptin.
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Liang W, Ye D, Dai L, Shen Y, Xu J. Overexpression of hTERT extends replicative capacity of human nucleus pulposus cells, and protects against serum starvation-induced apoptosis and cell cycle arrest. J Cell Biochem 2012; 113:2112-21. [DOI: 10.1002/jcb.24082] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Abstract
The existence of pronounced differences in health outcomes between US populations is a problem of moral significance and public health urgency. Pursuing research on genetic contributors to such disparities, despite striking data on the fundamental role of social factors, has been controversial. Still, advances in genomic science are providing an understanding of disease biology at a level of precision not previously possible. The potential for genomic strategies to help in addressing population-level disparities therefore needs to be carefully evaluated. Using 3 examples from current research, we argue that the best way to maximize the benefits of population-based genomic investigations, and mitigate potential harms, is to direct research away from the identification of genetic causes of disparities and instead focus on applying genomic methodologies to the development of clinical and public health tools with the potential to ameliorate healthcare inequities, direct population-level health interventions or inform public policy. Such a transformation will require close collaboration between transdisciplinary teams and community members as well as a reorientation of current research objectives to better align genomic discovery efforts with public health priorities and well-recognized barriers to fair health care delivery.
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Affiliation(s)
- S M Fullerton
- Department of Bioethics and Humanities, and Center for Genomics and Healthcare Equality, University of Washington, Seattle, WA 98195, USA.
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