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Li H, Jin X, Lai M, Li Y, Li R, Yang H, Yang B. Knockdown of circ_CLIP2 regulates the proliferation, metastasis and apoptosis of glioma cells through miR-641/EPHA3/STAT3 axis. J Neurogenet 2023; 37:93-102. [PMID: 37129498 DOI: 10.1080/01677063.2023.2199067] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2022] [Accepted: 03/30/2023] [Indexed: 05/03/2023]
Abstract
A great amount of reaches have confirmed that circular RNAs (circRNAs) are novel regulators in glioma progression. Here, our work aimed to probe the specific role of circ_CLIP2 in glioma. The mRNA and protein expressions were analyzed by qRT-PCR and western blot, respectively. Cell viability, migration, invasion and apoptosis were examined by MTT assay, tranwell and flow cytometry assays, respectively. Moreover, the binding relationships between circ_CLIP2, microRNA (miR)-641 and erythropoietin-producing human hepatocellular (Eph)A3 were verified by dual luciferase reporter gene assay and/or RIP assay. The following data showed that circ_CLIP2 and EPHA3 were markedly increased in glioma tissues and cells, while miR-647 was downregulated. Gain- and loss-of-function experiments discovered that circ_CLIP2 knockdown remarkably inhibited cell proliferation, migration and invasion and promoted cell apoptosis of glioma cells, while these effects of circ_CLIP2 knockdown were abolished by miR-641 inhibition. Circ_CLIP2 was proved as a sponge of miR-641 to competitively upregulate EPHA3 expression. In addition, EPHA3 overexpression could abolish the inhibitory effects of miR-641 overexpression on the malignant behaviors of glioma cells by activating the signal transducer and activator of transcription 3 (STAT3). These findings elucidated that circ_CLIP2 knockdown suppressed glioma development by regulation of the miR-641/EP HA3/STAT3 axis, which provided a novel mechanism for understanding the pathogenesis of glioma.
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Affiliation(s)
- Huibing Li
- Department of Neurosurgery, Guangdong 999 Brain Hospital, Guangzhou, Guangdong Province, PR China
| | - Xin Jin
- Department of Neurosurgery, Guangdong 999 Brain Hospital, Guangzhou, Guangdong Province, PR China
| | - Mingyao Lai
- Department of Neurosurgery, Guangdong 999 Brain Hospital, Guangzhou, Guangdong Province, PR China
| | - Yongshi Li
- Department of Neurosurgery, Guangdong 999 Brain Hospital, Guangzhou, Guangdong Province, PR China
| | - Ruixing Li
- Department of Neurosurgery, Guangdong 999 Brain Hospital, Guangzhou, Guangdong Province, PR China
| | - Huihui Yang
- Department of Ultrasonography, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong Province, PR China
| | - Baoying Yang
- Department of Neurosurgery, Guangdong 999 Brain Hospital, Guangzhou, Guangdong Province, PR China
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Zhang J, Chen H, Chen C, Liu H, He Y, Zhao J, Yang P, Mao Q, Xia H. Systemic administration of mesenchymal stem cells loaded with a novel oncolytic adenovirus carrying IL-24/endostatin enhances glioma therapy. Cancer Lett 2021; 509:26-38. [PMID: 33819529 DOI: 10.1016/j.canlet.2021.03.027] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2021] [Revised: 03/25/2021] [Accepted: 03/26/2021] [Indexed: 12/20/2022]
Abstract
Oncolytic adenovirus-mediated gene therapy shows promise for cancer treatment; however, the systemic delivery of oncolytic adenovirus to tumors remains challenging. Recently, mesenchymal stem cells (MSCs) have emerged as potential vehicles for improving delivery. Yet, because the oncolytic adenovirus replicates in MSCs, balancing MSC viability with viral load is key to achieving optimal therapeutic effect. We thus developed an all-in-one Tet-on system that can regulate replication of oncolytic adenovirus. Then, we loaded the novel oncolytic adenovirus carrying interleukin (IL)-24 and/or Endostatin in human umbilical cord blood-mesenchymal stem cells (hUCB-MSCs) for glioma therapy. In vitro assays demonstrated that this novel oncolytic adenovirus could efficiently replicate and kill glioma cells while sparing normal cells. Moreover, doxycycline effectively regulated oncolytic adenovirus replication in the hUCB-MSCs. The doxycycline induction group with dual expression of IL-24 and Endostatin exhibited significantly greater antitumor effects than other groups in a xenograft model of glioma. Thus, this strategy for systemic delivery of oncolytic adenovirus with its oncolytic activity controlled by a Tet-on system is a promising method for achieving antitumor efficacy in glioma, especially for metastatic tumors.
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Affiliation(s)
- Junhe Zhang
- Laboratory of Gene Therapy, Department of Biochemistry, College of Life Sciences, Shaanxi Normal University, Xi'an, 710062, PR China; Department of Biochemistry and Molecular Biology, Xinxiang Medical University, Xinxiang, 453003, PR China.
| | - Hao Chen
- Laboratory of Gene Therapy, Department of Biochemistry, College of Life Sciences, Shaanxi Normal University, Xi'an, 710062, PR China; Key Laboratory of Biomedical Information Engineering of Ministry of Education, Biomedical Informatics & Genomics Center, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an, 710049, PR China.
| | - Chen Chen
- Laboratory of Gene Therapy, Department of Biochemistry, College of Life Sciences, Shaanxi Normal University, Xi'an, 710062, PR China.
| | - Haimeng Liu
- Laboratory of Gene Therapy, Department of Biochemistry, College of Life Sciences, Shaanxi Normal University, Xi'an, 710062, PR China.
| | - Yurou He
- Laboratory of Gene Therapy, Department of Biochemistry, College of Life Sciences, Shaanxi Normal University, Xi'an, 710062, PR China.
| | - Junli Zhao
- Laboratory of Gene Therapy, Department of Biochemistry, College of Life Sciences, Shaanxi Normal University, Xi'an, 710062, PR China.
| | - Peiyan Yang
- Laboratory of Gene Therapy, Department of Biochemistry, College of Life Sciences, Shaanxi Normal University, Xi'an, 710062, PR China.
| | - Qinwen Mao
- Department of Pathology, University of Utah, Huntsman Cancer Institute, 2000 Circle of Hope Drive, Salt Lake City, UT, 84112, USA.
| | - Haibin Xia
- Laboratory of Gene Therapy, Department of Biochemistry, College of Life Sciences, Shaanxi Normal University, Xi'an, 710062, PR China.
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Xia L, Jin P, Tian W, Liang S, Tan L, Li B. Up-regulation of MARVEL domain-containing protein 1 (MARVELD1) accelerated the malignant phenotype of glioma cancer cells via mediating JAK/STAT signaling pathway. ACTA ACUST UNITED AC 2021; 54:e10236. [PMID: 34008750 PMCID: PMC8130134 DOI: 10.1590/1414-431x2020e10236] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2020] [Accepted: 11/24/2020] [Indexed: 12/24/2022]
Abstract
This work aimed to research the function of MARVEL domain-containing protein 1 (MARVELD1) in glioma as well as its functioning mode. Bioinformatics analysis was utilized to assess the MARVELD1 expression in glioma tissues and its relationship with grade and prognosis, based on The Cancer Genome Atlas (TCGA), Genotype-Tissue Expression (GTEx), and Chinese Glioma Genome Atlas (CGGA) databases. Cell Counting Kit-8 (CCK-8), colony formation, and Transwell assays were carried out to determine the impact of MARVELD1 on malignant biological behavior of glioma, such as proliferation, invasion, and migration. qRT-PCR was carried out to test the mRNA level of MARVELD1. Western blot assay was performed to measure the protein expression of MARVELD1 and JAK/STAT pathway-related proteins. MARVELD1 was expressed at high levels in glioma tissues and cell lines. Kaplan-Meier survival analysis revealed that the higher MARVELD1 expression, the shorter the survival time of patients with glioma. Also, the MARVELD1 expression in WHO IV was significantly enhanced compared to that in WHO II and WHO III. Furthermore, the functional analysis of MARVELD1 in vitro revealed that knockdown of MARVELD1 in U251 cells restrained cell proliferation, migration, and invasion, while up-regulation of MARVELD1 in U87 cells presented opposite outcomes. Finally, we found that JAK/STAT signaling pathway mediated the function of MARVELD1 in glioma. MARVELD1 contributed to promoting the malignant progression of glioma, which is the key driver of activation of JAK/STAT signaling pathway in gliomas.
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Affiliation(s)
- Lingyang Xia
- Department of Neurosurgery, The Second Affiliated Hospital of Mudanjiang Medical College, Mudanjiang, China
| | - Peng Jin
- Department of Operating Room, Hongqi Hospital Affiliated to Mudanjiang Medical College, Mudanjiang, China
| | - Wei Tian
- Department of Operating Room, Hongqi Hospital Affiliated to Mudanjiang Medical College, Mudanjiang, China
| | - Shuang Liang
- Department of X-ray, Hongqi Hospital Affiliated to Mudanjiang Medical College, Mudanjiang, China
| | - Liye Tan
- Department of Hepatobiliary Surgery, The Second Affiliated Hospital of Mudanjiang Medical College, Mudanjiang, China
| | - Binxin Li
- Department of Operating Room, Hongqi Hospital Affiliated to Mudanjiang Medical College, Mudanjiang, China
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Song T, Hu Z, Liu J, Huang W. FLOT2 upregulation promotes growth and invasion by interacting and stabilizing EphA2 in gliomas. Biochem Biophys Res Commun 2021; 548:67-73. [PMID: 33631676 DOI: 10.1016/j.bbrc.2021.02.062] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Accepted: 02/14/2021] [Indexed: 12/13/2022]
Abstract
The expression and roles of FLOT2, especially for its underlying mechanism, in gliomas have been rarely revealed. In this study, upregulations of both FLOT2 and EphA2 in gliomas tissues were validated by immunohistochemistry (IHC) staining and Western blot. FLOT2 silencing notably inhibited the growth and invasion of gliomas cells. Simultaneously, FLOT2 depletion suppressed Akt and NF-κB activities, induced apoptosis, cell cycle arrest, and epithelial-mesenchymal transition (EMT) inhibition, demonstrated by expression alterations of key proteins of the above processes. Mechanistically, FLOT2 could maintain EphA2 stability viainteraction, and restoration of EphA2 could remarkably release the suppressive effects on gliomas cells induced by FLOT2 knockdown. Lastly, FLOT2 and EphA2, whose protein and mRNA levels are both positively correlated in gliomas, shows significant association with clinical characteristics like Ki67 intensity, p53 expression, and tumor stage in patients with gliomas. In conclusion, our results reveal the upregulation, oncogenic roles of FLOT2, and the corresponding underlying mechanism in gliomas, highlighting that the FLOT2-EphA2 axis is served as a promising therapeutic target for gliomas.
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Affiliation(s)
- Tao Song
- Department of Neurosurgery, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Zhongxu Hu
- Department of Neurosurgery, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Jie Liu
- Department of Pathology, Changsha Central Hospital, Changsha, Hunan, China
| | - Wei Huang
- Department of Neurosurgery, Xiangya Hospital, Central South University, Changsha, Hunan, China; Research Center of Carcinogenesis and Targeted Therapy, Xiangya Hospital, Changsha, Hunan, China.
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Zheng K, Xie H, Wu W, Wen X, Zeng Z, Shi Y. CircRNA PIP5K1A promotes the progression of glioma through upregulation of the TCF12/PI3K/AKT pathway by sponging miR-515-5p. Cancer Cell Int 2021; 21:27. [PMID: 33413401 PMCID: PMC7789671 DOI: 10.1186/s12935-020-01699-6] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2020] [Accepted: 12/02/2020] [Indexed: 12/16/2022] Open
Abstract
Background Increasing studies have revealed that circular RNAs (CircRNAs) make great contributions to regulating tumor progression. Therefore, we intended to explore the expression characteristics, function, and related mechanisms of a novel type of circRNA, PIP5K1A, in glioma. Methods Firstly, reverse transcription-polymerase chain reaction (RT-PCR) was carried out to examine CircPIP5K1A expression in glioma tissues and adjacent normal tissues, and the correlation between CircPIP5K1A level and the clinical-pathological indicators of glioma was analyzed. Then, the CircPIP5K1A expression in various glioma cell lines was detected, and CircPIP5K1A overexpression and knockdown cell models were constructed. Subsequently, cell proliferation and viability were detected by the CCK8 method and BrdU staining. Cell apoptosis was detected by flow cytometry, and cell invasion was examined by Transwell assay. The expression of TCF12, PI3K/AKT pathway apoptotic related proteins (Caspase3, Bax, and Bcl2) and epithelial-mesenchymal transition (EMT) markers (E-cadherin, Vimentin, and N-cadherin) was determined by western blot or RT-PCR. Results The results manifested that CircPIP5K1A was upregulated in glioma tissues (compared with that in normal adjacent tissues), and overexpressed CircPIP5K1A was related to glioma volume and histopathological grade. Functionally, overexpressing CircPIP5K1A notably elevated glioma cell proliferation, invasion, and EMT and inhibited apoptosis both in vivo and in vitro. Besides, CircPIP5K1A upregulated TCF12 and PI3K/AKT activation. Bioinformatics analysis testified that miR-515-5p was a common target of CircPIP5K1A and TCF12, while the dual-luciferase reporter assay and RNA immunoprecipitation (RIP) experiment further confirmed that CircPIP5K1A targeted miR-515-5p, which bound the 3′-untranslated region (UTR) of TCF12. Conclusions Overall, the study illustrated that CircPIP5K1A is a potential prognostic marker in glioma and regulates glioma evolvement by modulating the miR-515-5p-mediated TCF12/PI3K/AKT axis.
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Affiliation(s)
- Kebin Zheng
- Department of Neurosurgery, Affiliated Hospital of Hebei University, No.212Yuhua Road, Lianchi District, Baoding, 071000, Hebei, China
| | - Haipeng Xie
- Department of Neurosurgery, Affiliated Hospital of Hebei University, No.212Yuhua Road, Lianchi District, Baoding, 071000, Hebei, China
| | - Wensong Wu
- Department of Neurosurgery, Affiliated Hospital of Hebei University, No.212Yuhua Road, Lianchi District, Baoding, 071000, Hebei, China
| | - Xichao Wen
- Department of Neurosurgery, Affiliated Hospital of Hebei University, No.212Yuhua Road, Lianchi District, Baoding, 071000, Hebei, China
| | - Zhaomu Zeng
- Department of Neurosurgery, Affiliated Hospital of Hebei University, No.212Yuhua Road, Lianchi District, Baoding, 071000, Hebei, China
| | - Yanfang Shi
- Department of Neurosurgery, Affiliated Hospital of Hebei University, No.212Yuhua Road, Lianchi District, Baoding, 071000, Hebei, China.
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Mohamadi A, Pagès G, Hashemzadeh MS. The Important Role of Oncolytic Viruses in Common Cancer Treatments. CURRENT CANCER THERAPY REVIEWS 2020. [DOI: 10.2174/1573394716666200211120906] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Oncolytic viruses (OV) are considered as promising tools in cancer treatment. In addition
to direct cytolysis, the stimulation of both innate and adaptive immune responses is the most
important mechanism in oncolytic virotherapy that finally leads to the long-standing tumor retardations
in the advanced melanoma clinical trials. The OVs have become a worthy method in cancer
treatment, due to their several biological advantages including (1) the selective replication in
cancer cells without affecting normal cells; (2) the lack of resistance to the treatment; (3) cancer
stem cell targeting; (4) the ability to be spread; and (5) the immune response induction against the
tumors. Numerous types of viruses; for example, Herpes simplex viruses, Adenoviruses, Reoviruses,
Poliovirus, and Newcastle disease virus have been studied as a possible cancer treatment
strategy. Although some viruses have a natural orientation or tropism to cancer cells, several others
need attenuation and genetic manipulation to increase the safety and tumor-specific replication activity.
Two important mechanisms are involved in OV antitumor responses, which include the tumor
cell death due to virus replication, and also induction of immunogenic cell death as a result of
the immune system responses against the tumor cells. Furthermore, the high efficiency of OV on
antitumor immune response stimulation can finally lead to a significant tumor shrinkage.
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Affiliation(s)
- Amir Mohamadi
- Applied Virology Research Center, Baqiyatallah University of Medical Sciences, Tehran, Iran
| | - Gilles Pagès
- Centre Antoine Lacassagne, University of Cote d’Azur, Nice, France
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Lara-Velazquez M, Alkharboosh R, Norton ES, Ramirez-Loera C, Freeman WD, Guerrero-Cazares H, Forte AJ, Quiñones-Hinojosa A, Sarabia-Estrada R. Chitosan-Based Non-viral Gene and Drug Delivery Systems for Brain Cancer. Front Neurol 2020; 11:740. [PMID: 32849207 PMCID: PMC7406673 DOI: 10.3389/fneur.2020.00740] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2020] [Accepted: 06/16/2020] [Indexed: 12/17/2022] Open
Abstract
Central nervous system (CNS) tumors are a leading source of morbidity and mortality worldwide. Today, different strategies have been developed to allow targeted and controlled drug delivery into the brain. Gene therapy is a system based on the modification of patient's cells through the introduction of genetic material to exert a specific action. Administration of the foreign genetic material can be done through viral-mediated delivery or non-viral delivery via physical or mechanical systems. For brain cancer specifically, gene therapy can overcome the actual challenge of blood brain barrier penetration, the main reason for therapeutic failure. Chitosan (CS), a natural based biodegradable polymer obtained from the exoskeleton of crustaceans such as crab, shrimp, and lobster, has been used as a delivery vehicle in several non-viral modification strategies. This cationic polysaccharide is highly suitable for gene delivery mainly due to its chemical properties, its non-toxic nature, its capacity to protect nucleic acids through the formation of complexes with the genetic material, and its ease of degradation in organic environments. Recent evidence supports the use of CS as an alternative gene delivery system for cancer treatment. This review will describe multiple studies highlighting the advantages and challenges of CS-based delivery structures for the treatment of brain tumors. Furthermore, this review will provide insight on the translational potential of various CS based-strategies in current clinical cancer studies. Specifically, CS-based nanostructures including nanocapsules, nanospheres, solid-gel formulations, and nanoemulsions, also microshperes and micelles will be evaluated.
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Affiliation(s)
- Montserrat Lara-Velazquez
- Mayo Clinic Florida, Department of Neurosurgery, Jacksonville, FL, United States
- Plan of Combined Studies in Medicine (PECEM), UNAM, Mexico City, Mexico
| | - Rawan Alkharboosh
- Mayo Clinic Florida, Department of Neurosurgery, Jacksonville, FL, United States
- Neuroscience Graduate Program, Mayo Clinic Graduate School of Biomedical Sciences, Mayo Clinic, Rochester, MN, United States
- Regenerative Sciences Training Program, Center for Regenerative Medicine, Mayo Clinic, Rochester, MN, United States
| | - Emily S. Norton
- Mayo Clinic Florida, Department of Neurosurgery, Jacksonville, FL, United States
- Neuroscience Graduate Program, Mayo Clinic Graduate School of Biomedical Sciences, Mayo Clinic, Rochester, MN, United States
- Regenerative Sciences Training Program, Center for Regenerative Medicine, Mayo Clinic, Rochester, MN, United States
| | | | - William D. Freeman
- Mayo Clinic Florida, Department of Neurosurgery, Jacksonville, FL, United States
| | | | - Antonio J. Forte
- Mayo Clinic Florida, Department of Neurosurgery, Jacksonville, FL, United States
- Division of Plastic Surgery and Robert D. and Patricia E. Kern Center for the Science of Health Care Delivery, Mayo Clinic, Jacksonville, FL, United States
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Staquicini FI, Smith TL, Tang FHF, Gelovani JG, Giordano RJ, Libutti SK, Sidman RL, Cavenee WK, Arap W, Pasqualini R. Targeted AAVP-based therapy in a mouse model of human glioblastoma: a comparison of cytotoxic versus suicide gene delivery strategies. Cancer Gene Ther 2019; 27:301-310. [PMID: 31130731 PMCID: PMC6879804 DOI: 10.1038/s41417-019-0101-2] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2018] [Revised: 04/09/2019] [Accepted: 04/27/2019] [Indexed: 11/29/2022]
Abstract
Glioblastoma persists as a uniformly deadly diagnosis for patients and effective therapeutic options are gravely needed. Recently, targeted gene therapy approaches are reemerging as attractive experimental clinical agents. Our ligand-directed hybrid virus of adeno-associated virus and phage (AAVP) is a targeted gene delivery vector that has been used in several formulations displaying targeting ligand peptides to deliver clinically applicable transgenes. Here we compared different constructs side-by-side in a tumor model, an orthotopic model of xenograft human glioblastoma cells stereotactically implanted in immunodeficient mice. We have used divergent therapeutic strategies for two AAVP constructs, both displaying a double-cyclic RGD4C motif ligand specific for alpha V integrins expressed in tumor vascular endothelium, but carrying different genes of interest for the treatment of intracranial xenografted tumors. One construct delivered tumor necrosis factor (TNF), a purely cytotoxic gene for antitumor activity (RGD4C-AAVP-TNF); in the other construct, we delivered Herpes simplex virus thymidine kinase (HSVtk) for in tandem molecular-genetic imaging and targeted therapy (RGD4C-AAVP-HSVtk) utilizing ganciclovir (GCV) for a suicide gene therapy. Both AAVP constructs demonstrated antitumor activity, with damage to the tumor-associated neovasculature and induction of cell death evident after treatment. In addition, the ability to monitor transgene expression with a radiolabeled HSVtk substrate pre and post GCV treatment demonstrated the theranostic potential of RGD4C-AAVP-HSVtk. We conclude that targeted AAVP constructs delivering either cytotoxic TNF or theranostic HSVtk followed by suicide gene therapy with GCV have comparable preclinical efficacy, at least in this standard experimental model. The results presented here provide a blueprint for future studies of targeted gene delivery against human glioblastomas and other brain tumors.
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Affiliation(s)
- Fernanda I Staquicini
- Rutgers Cancer Institute of New Jersey and Division of Cancer Biology, Department of Radiation Oncology, Rutgers New Jersey Medical School, Newark, NJ, USA
| | - Tracey L Smith
- Rutgers Cancer Institute of New Jersey and Division of Cancer Biology, Department of Radiation Oncology, Rutgers New Jersey Medical School, Newark, NJ, USA
| | - Fenny H F Tang
- Department of Biochemistry, Institute of Chemistry, University of São Paulo, São Paulo, São Paulo, Brazil
| | - Juri G Gelovani
- Karmanos Cancer Institute, School of Medicine and Department of Biomedical Engineering, College of Engineering, Wayne State University, Detroit, MI, USA
| | - Ricardo J Giordano
- Department of Biochemistry, Institute of Chemistry, University of São Paulo, São Paulo, São Paulo, Brazil
| | - Steven K Libutti
- Rutgers Cancer Institute of New Jersey and Department of Surgery, Rutgers Robert Wood Johnson Medical School, New Brunswick, NJ, USA
| | - Richard L Sidman
- Department of Neurology, Harvard Medical School, Boston, MA, USA
| | - Webster K Cavenee
- Ludwig Institute for Cancer Research, University of California-San Diego, La Jolla, CA, USA
| | - Wadih Arap
- Rutgers Cancer Institute of New Jersey and Division of Hematology/Oncology, Department of Medicine, Rutgers New Jersey Medical School, Newark, NJ, USA.
| | - Renata Pasqualini
- Rutgers Cancer Institute of New Jersey and Division of Cancer Biology, Department of Radiation Oncology, Rutgers New Jersey Medical School, Newark, NJ, USA.
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