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Haberl EM, Pohl R, Rein-Fischboeck L, Höring M, Krautbauer S, Liebisch G, Buechler C. Accumulation of cholesterol, triglycerides and ceramides in hepatocellular carcinomas of diethylnitrosamine injected mice. Lipids Health Dis 2021; 20:135. [PMID: 34629057 PMCID: PMC8502393 DOI: 10.1186/s12944-021-01567-w] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Accepted: 09/21/2021] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND Dysregulated lipid metabolism is critically involved in the development of hepatocellular carcinoma (HCC). The respective metabolic pathways affected in HCC can be identified using suitable experimental models. Mice injected with diethylnitrosamine (DEN) and fed a normal chow develop HCC. For the analysis of the pathophysiology of HCC in this model a comprehensive lipidomic analysis was performed. METHODS Lipids were measured in tumor and non-tumorous tissues by direct flow injection analysis. Proteins with a role in lipid metabolism were analysed by immunoblot. Mann-Whitney U-test or paired Student´s t-test were used for data analysis. RESULTS Intra-tumor lipid deposition is a characteristic of HCCs, and di- and triglycerides accumulated in the tumor tissues of the mice. Peroxisome proliferator-activated receptor gamma coactivator 1 alpha, lipoprotein lipase and hepatic lipase protein were low in the tumors whereas proteins involved in de novo lipogenesis were not changed. Higher rates of de novo lipogenesis cause a shift towards saturated acyl chains, which did not occur in the murine HCC model. Besides, LDL-receptor protein and cholesteryl ester levels were higher in the murine HCC tissues. Ceramides are cytotoxic lipids and are low in human HCCs. Notably, ceramide levels increased in the murine tumors, and the simultaneous decline of sphingomyelins suggests that sphingomyelinases were involved herein. DEN is well described to induce the tumor suppressor protein p53 in the liver, and p53 was additionally upregulated in the tumors. CONCLUSIONS Ceramides mediate the anti-cancer effects of different chemotherapeutic drugs and restoration of ceramide levels was effective against HCC. High ceramide levels in the tumors makes the DEN injected mice an unsuitable model to study therapies targeting ceramide metabolism. This model is useful for investigating how tumors evade the cytotoxic effects of ceramides.
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Affiliation(s)
- Elisabeth M Haberl
- Department of Internal Medicine I, Regensburg University Hospital, 93053, Regensburg, Germany
| | - Rebekka Pohl
- Department of Internal Medicine I, Regensburg University Hospital, 93053, Regensburg, Germany
| | - Lisa Rein-Fischboeck
- Department of Internal Medicine I, Regensburg University Hospital, 93053, Regensburg, Germany
| | - Marcus Höring
- Institute of Clinical Chemistry and Laboratory Medicine, Regensburg University Hospital, 93053, Regensburg, Germany
| | - Sabrina Krautbauer
- Institute of Clinical Chemistry and Laboratory Medicine, Regensburg University Hospital, 93053, Regensburg, Germany
| | - Gerhard Liebisch
- Institute of Clinical Chemistry and Laboratory Medicine, Regensburg University Hospital, 93053, Regensburg, Germany
| | - Christa Buechler
- Department of Internal Medicine I, Regensburg University Hospital, 93053, Regensburg, Germany.
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2
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Seo MJ, Park JH, Lee KC, Lee YJ, Lee TS, Choi TH, Lee SW, Kim KI, Kang JH. Small Animal PET Imaging of hTERT RNA-Targeted HSV1-tk Gene Expression with Trans-Splicing Ribozyme. Cancer Biother Radiopharm 2019; 35:26-32. [PMID: 31746630 DOI: 10.1089/cbr.2019.2839] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Background: Trans-splicing ribozymes (TSR) are useful anticancer agents targeting cancer-specific transcripts and replacing the RNA to induce anticancer gene expression specifically and selectively in cancer cells. Similar to other gene therapy methods, it is also important to evaluate the transgene expression for target specificity and ribozyme activity. Materials and Methods: In this study, the authors performed in vivo small animal positron emission tomography (PET) imaging and biodistribution assay to evaluate human telomerase reverse transcriptase (hTERT) RNA-targeting-specific TSR, which directs the expression of herpes simplex virus type 1 thymidine kinase (HSV1-tk) gene selectively in hTERT-positive tumors through targeted RNA replacement of the hTERT transcript. Results: The hTERT RNA-targeted HSV1-tk expression with TSR was monitored by PET imaging with 124I labeled 2'-fluoro-2'-deoxy-1-β-D-arabinofuranosyl-5-iodouracil, which is one of the thymidine derivatives acting as substrates for HSV1-tk, in hTERT-positive tumor-bearing mice. Conclusions: Imaging of hTERT RNA-targeted HSV1-tk expression by TSR could be used in the development of advanced gene therapy using tumor-specific TSR.
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Affiliation(s)
- Min-Jung Seo
- Division of Applied RI, Korea Institute of Radiological and Medical Sciences, Seoul, Korea
| | - Ju Hui Park
- Division of Applied RI, Korea Institute of Radiological and Medical Sciences, Seoul, Korea
| | - Kyo Chul Lee
- Division of Applied RI, Korea Institute of Radiological and Medical Sciences, Seoul, Korea
| | - Yong Jin Lee
- Division of Applied RI, Korea Institute of Radiological and Medical Sciences, Seoul, Korea
| | - Tae Sup Lee
- Division of Applied RI, Korea Institute of Radiological and Medical Sciences, Seoul, Korea
| | - Tae Hyun Choi
- Division of Applied RI, Korea Institute of Radiological and Medical Sciences, Seoul, Korea
| | - Seong-Wook Lee
- Department of Integrated Life Sciences, Research Institute of Advanced Omics, Dankook University, Yongin, Korea
| | - Kwang Il Kim
- Division of Applied RI, Korea Institute of Radiological and Medical Sciences, Seoul, Korea
| | - Joo Hyun Kang
- Division of Applied RI, Korea Institute of Radiological and Medical Sciences, Seoul, Korea
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3
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Zhao Z, Dai J, Yu Y, Zhang Q, Liu S, Huang G, Zhang Z, Chen T, Pan R, Lu L, Zhang W, Liao W, Lu X. Non-invasive Bioluminescence Monitoring of Hepatocellular Carcinoma Therapy in an HCR Mouse Model. Front Oncol 2019; 9:864. [PMID: 31572672 PMCID: PMC6749040 DOI: 10.3389/fonc.2019.00864] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Accepted: 08/21/2019] [Indexed: 12/12/2022] Open
Abstract
Animal models play crucial roles in the development of anticancer therapeutics. The ability to quickly assess the localized primary hepatocellular carcinoma (HCC) status in a non-invasive manner would significantly improve the effectiveness of anti-HCC therapeutic studies. However, to date, animal models with this advantage are extremely scarce. In this study, we developed a novel animal model for the fast assessment of drug efficacy against primary HCC in vivo. HCC was induced in immunocompetent hepatocarcinogenesis reporter (HCR) mice by diethylnitrosamine (DEN) injection and confirmed by histopathological staining. Using the bioluminescence imaging (BLI) technique, HCC progression was longitudinally visualized and monitored in a non-invasive way. Tests of two clinical drugs showed that both sorafenib and oxaliplatin significantly inhibited the BLI signal in mouse liver in a dose-dependent manner. The in vivo intensity of BLI signals was highly consistent with the final tumor burden status in mouse liver after drug treatment. The inhibitory effect of anti-HCC drugs was accurately evaluated through in vivo BLI intensity detection. Our study successfully established a bioluminescence mouse model for non-invasive real-time monitoring of HCC therapy, and this HCR mouse model would be a useful tool for potential anti-HCC drug screening and new therapeutic strategy development.
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Affiliation(s)
- Zhu Zhao
- School of Basic Medical Sciences, Wenzhou Medical University, Wenzhou, China
| | - Juji Dai
- School of Basic Medical Sciences, Wenzhou Medical University, Wenzhou, China
| | - Yan Yu
- School of Basic Medical Sciences, Wenzhou Medical University, Wenzhou, China
| | - Qian Zhang
- School of Basic Medical Sciences, Wenzhou Medical University, Wenzhou, China
| | - Sai Liu
- School of Basic Medical Sciences, Wenzhou Medical University, Wenzhou, China
| | - Guanmeng Huang
- School of Basic Medical Sciences, Wenzhou Medical University, Wenzhou, China
| | - Zheng Zhang
- School of Basic Medical Sciences, Wenzhou Medical University, Wenzhou, China
| | - Tianke Chen
- School of Basic Medical Sciences, Wenzhou Medical University, Wenzhou, China
| | - Rulu Pan
- School of Basic Medical Sciences, Wenzhou Medical University, Wenzhou, China
| | - Liting Lu
- School of Basic Medical Sciences, Wenzhou Medical University, Wenzhou, China
| | - Wenyi Zhang
- School of Basic Medical Sciences, Wenzhou Medical University, Wenzhou, China
| | - Wanqin Liao
- School of Basic Medical Sciences, Wenzhou Medical University, Wenzhou, China
| | - Xincheng Lu
- School of Basic Medical Sciences, Wenzhou Medical University, Wenzhou, China
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4
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Kim KI, Chung HK, Park JH, Lee YJ, Kang JH. Alpha-fetoprotein-targeted reporter gene expression imaging in hepatocellular carcinoma. World J Gastroenterol 2016; 22:6127-6134. [PMID: 27468205 PMCID: PMC4945974 DOI: 10.3748/wjg.v22.i27.6127] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/25/2016] [Revised: 05/02/2016] [Accepted: 05/23/2016] [Indexed: 02/06/2023] Open
Abstract
Hepatocellular carcinoma (HCC) is one of the most common cancers in Eastern Asia, and its incidence is increasing globally. Numerous experimental models have been developed to better our understanding of the pathogenic mechanism of HCC and to evaluate novel therapeutic approaches. Molecular imaging is a convenient and up-to-date biomedical tool that enables the visualization, characterization and quantification of biologic processes in a living subject. Molecular imaging based on reporter gene expression, in particular, can elucidate tumor-specific events or processes by acquiring images of a reporter gene’s expression driven by tumor-specific enhancers/promoters. In this review, we discuss the advantages and disadvantages of various experimental HCC mouse models and we present in vivo images of tumor-specific reporter gene expression driven by an alpha-fetoprotein (AFP) enhancer/promoter system in a mouse model of HCC. The current mouse models of HCC development are established by xenograft, carcinogen induction and genetic engineering, representing the spectrum of tumor-inducing factors and tumor locations. The imaging analysis approach of reporter genes driven by AFP enhancer/promoter is presented for these different HCC mouse models. Such molecular imaging can provide longitudinal information about carcinogenesis and tumor progression. We expect that clinical application of AFP-targeted reporter gene expression imaging systems will be useful for the detection of AFP-expressing HCC tumors and screening of increased/decreased AFP levels due to disease or drug treatment.
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5
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Jang SJ, Kang JH, Lee YJ, Kim KI, Lee TS, Choe JG, Lim SM. Detection of metastatic tumors after γ-irradiation using longitudinal molecular imaging and gene expression profiling of metastatic tumor nodules. Int J Oncol 2016; 48:1361-8. [PMID: 26892334 PMCID: PMC4777593 DOI: 10.3892/ijo.2016.3384] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2015] [Accepted: 01/11/2016] [Indexed: 12/26/2022] Open
Abstract
A few recent reports have indicated that metastatic growth of several human cancer cells could be promoted by radiotherapy. C6-L cells expressing the firefly luciferase (fLuc) gene were implanted subcutaneously into the right thigh of BALB/c nu/nu mice. C6-L xenograft mice were treated locally with 50-Gy γ-irradiation (γ-IR) in five 10-Gy fractions. Metastatic tumors were evaluated after γ-IR by imaging techniques. Total RNA from non-irradiated primary tumor (NRPT), γ-irradiated primary tumor (RPT), and three metastatic lung nodule was isolated and analyzed by microarray. Metastatic lung nodules were detected by BLI and PET/CT after 6–9 weeks of γ-IR in 6 (17.1%) of the 35 mice. The images clearly demonstrated high [18F]FLT and [18F]FDG uptake into metastatic lung nodules. Whole mRNA expression patterns were analyzed by microarray to elucidate the changes among NRPT, RPT and metastatic lung nodules after γ-IR. In particular, expression changes in the cancer stem cell markers were highly significant in RPT. We observed the metastatic tumors after γ-IR in a tumor-bearing animal model using molecular imaging methods and analyzed the gene expression profile to elucidate genetic changes after γ-IR.
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Affiliation(s)
- Su Jin Jang
- Molecular Imaging Research Center, Korea Institute of Radiological and Medical Sciences (KIRAMS), Seoul 139-706, Republic of Korea
| | - Joo Hyun Kang
- Molecular Imaging Research Center, Korea Institute of Radiological and Medical Sciences (KIRAMS), Seoul 139-706, Republic of Korea
| | - Yong Jin Lee
- Molecular Imaging Research Center, Korea Institute of Radiological and Medical Sciences (KIRAMS), Seoul 139-706, Republic of Korea
| | - Kwang Il Kim
- Molecular Imaging Research Center, Korea Institute of Radiological and Medical Sciences (KIRAMS), Seoul 139-706, Republic of Korea
| | - Tae Sup Lee
- Molecular Imaging Research Center, Korea Institute of Radiological and Medical Sciences (KIRAMS), Seoul 139-706, Republic of Korea
| | - Jae Gol Choe
- Department of Nuclear Medicine, Korea University Anam Hospital, Korea University College of Medicine, Seoul 136-705, Republic of Korea
| | - Sang Moo Lim
- Molecular Imaging Research Center, Korea Institute of Radiological and Medical Sciences (KIRAMS), Seoul 139-706, Republic of Korea
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6
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Buckley SMK, Delhove JMKM, Perocheau DP, Karda R, Rahim AA, Howe SJ, Ward NJ, Birrell MA, Belvisi MG, Arbuthnot P, Johnson MR, Waddington SN, McKay TR. In vivo bioimaging with tissue-specific transcription factor activated luciferase reporters. Sci Rep 2015; 5:11842. [PMID: 26138224 PMCID: PMC4490336 DOI: 10.1038/srep11842] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2015] [Accepted: 06/08/2015] [Indexed: 11/22/2022] Open
Abstract
The application of transcription factor activated luciferase reporter cassettes in vitro is widespread but potential for in vivo application has not yet been realized. Bioluminescence imaging enables non-invasive tracking of gene expression in transfected tissues of living rodents. However the mature immune response limits luciferase expression when delivered in adulthood. We present a novel approach of tissue-targeted delivery of transcription factor activated luciferase reporter lentiviruses to neonatal rodents as an alternative to the existing technology of generating germline transgenic light producing rodents. At this age, neonates acquire immune tolerance to the conditionally responsive luciferase reporter. This simple and transferrable procedure permits surrogate quantitation of transcription factor activity over the lifetime of the animal. We show principal efficacy by temporally quantifying NFκB activity in the brain, liver and lungs of somatotransgenic reporter mice subjected to lipopolysaccharide (LPS)-induced inflammation. This response is ablated in Tlr4(-/-) mice or when co-administered with the anti-inflammatory glucocorticoid analogue dexamethasone. Furthermore, we show the malleability of this technology by quantifying NFκB-mediated luciferase expression in outbred rats. Finally, we use somatotransgenic bioimaging to longitudinally quantify LPS- and ActivinA-induced upregulation of liver specific glucocorticoid receptor and Smad2/3 reporter constructs in somatotransgenic mice, respectively.
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Affiliation(s)
- Suzanne M. K. Buckley
- Gene Transfer Technology Group, Institute for Women’s Health, University College London, 86–96 Chenies Mews, London WC1E 6HX, UK
| | - Juliette M. K. M. Delhove
- Stem Cell Group, Cardiovascular & Cell Sciences Research Institute, St. George’s University of London, Cranmer Terrace, London SW17 0RE, UK
- Wits/SAMRC Antiviral Gene Therapy Research Unit, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
| | - Dany P. Perocheau
- Gene Transfer Technology Group, Institute for Women’s Health, University College London, 86–96 Chenies Mews, London WC1E 6HX, UK
| | - Rajvinder Karda
- Gene Transfer Technology Group, Institute for Women’s Health, University College London, 86–96 Chenies Mews, London WC1E 6HX, UK
- Faculty of Medicine, Department of Surgery & Cancer, Imperial College, London, UK
| | - Ahad A. Rahim
- Department of Pharmacology, School of Pharmacy, University College London, 29–39 Brunswick Square, London WC1N 1AX, UK
| | - Steven J. Howe
- Wolfson Institute for Gene Therapy, Molecular and Cellular Immunology, Institute of Child Health, University College London, London WC1N 1EH, UK
| | - Natalie J. Ward
- Gene Transfer Technology Group, Institute for Women’s Health, University College London, 86–96 Chenies Mews, London WC1E 6HX, UK
| | - Mark A. Birrell
- Faculty of Medicine, National Heart & Lung Institute, Imperial College, London, UK
| | - Maria G. Belvisi
- Faculty of Medicine, National Heart & Lung Institute, Imperial College, London, UK
| | - Patrick Arbuthnot
- Wits/SAMRC Antiviral Gene Therapy Research Unit, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
| | - Mark R. Johnson
- Faculty of Medicine, Department of Surgery & Cancer, Imperial College, London, UK
| | - Simon N. Waddington
- Gene Transfer Technology Group, Institute for Women’s Health, University College London, 86–96 Chenies Mews, London WC1E 6HX, UK
- Wits/SAMRC Antiviral Gene Therapy Research Unit, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
| | - Tristan R. McKay
- Stem Cell Group, Cardiovascular & Cell Sciences Research Institute, St. George’s University of London, Cranmer Terrace, London SW17 0RE, UK
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7
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XIA DONG, FENG LIBO, WU XIAOLONG, XIA GUODONG, XU LIANG. Microencapsulation of recombinant adenovirus within poly-DL-lactide-poly(ethylene glycol) microspheres for enhanced gene transfection efficiency and inhibitory effects on hepatocellular carcinoma cells in vitro. Mol Med Rep 2015; 12:2336-42. [DOI: 10.3892/mmr.2015.3578] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2013] [Accepted: 06/17/2014] [Indexed: 11/06/2022] Open
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8
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Yuan C, Wang L, An Y, Wu G, Zhang D. Luciferase gene-loaded CS-Qdots as self-illuminating probes for specific hepatoma imaging. RSC Adv 2015. [DOI: 10.1039/c5ra01508a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Luciferase gene-loaded chitosan encapsulated quantum dots (CS-Qdots) can act as wavelength-tunable self-illuminating probes thus holding potential for improved tumor optical molecular imaging.
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Affiliation(s)
- Chenyan Yuan
- Zhong Da Hospital
- Medical School
- Southeast University
- 210009 Nanjing
- China
| | - Ling Wang
- Zhong Da Hospital
- Medical School
- Southeast University
- 210009 Nanjing
- China
| | - Yanli An
- Zhong Da Hospital
- Medical School
- Southeast University
- 210009 Nanjing
- China
| | - Guoqiu Wu
- Zhong Da Hospital
- Medical School
- Southeast University
- 210009 Nanjing
- China
| | - Dongsheng Zhang
- Medical School
- Southeast University
- 210009 Nanjing
- China
- Jiangsu Key Laboratory For Biomaterials and Devices
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9
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Park JH, Kim KI, Lee KC, Lee YJ, Lee TS, Chung WS, Lim SM, Kang JH. Assessment of α-fetoprotein targeted HSV1-tk expression in hepatocellular carcinoma with in vivo imaging. Cancer Biother Radiopharm 2014; 30:8-15. [PMID: 25545853 DOI: 10.1089/cbr.2014.1716] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Tumor-specific enhancer/promoter is applicable for targeting gene expression in tumors and helpful for tumor-targeting imaging and therapy. We aimed to acquire α-fetoprotein (AFP)-producing hepatocellular carcinoma (HCC) specific images using adenovirus containing HSV1-tk gene controlled by AFP enhancer/promoter and evaluate in vivo ganciclovir (GCV)-medicated therapeutic effects on AFP-targeted HSV1-tk expression with (18)F-FDG positron emission tomography (PET). Recombinant adenovirus expressing HSV1-tk under AFP enhancer/promoter was produced (AdAFP-TK) and the expression levels were evaluated by RT-PCR and (125)I-IVDU uptake. GCV-mediated HSV1-tk cytotoxicity was determined by MTT assay. After the mixture of AdAFP-fLuc and AdAFP-TK was administrated, bioluminescent images (BLIs) and (18)F-FHBG PET images were obtained in tumor-bearing mice. In vivo therapeutic effects of AdAFP-TK and GCV in the HuH-7 xenograft model were monitored by (18)F-FDG PET. When infected with AdAFP-TK, cell viability in HuH-7 was reduced, but those in HT-29 and SK-Hep-1 were not significantly decreased at any GCV concentration less than 100 μM. AFP-targeted fLuc and HSV1-tk expression were clearly visualized by BLI and (18)F-FHBG PET images in AFP-producing HCC, respectively. In vivo GCV-mediated tumor growth inhibition by AFP-targeted HSV1-tk expression was monitored by (18)F-FDG PET. Recombinant AdAFP-TK could be applied for AFP-targeted HCC gene therapy and imaging in AFP-producing HCC.
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Affiliation(s)
- Ju Hui Park
- 1 Molecular Imaging Research Center, Korea Institute of Radiological and Medical Sciences , Seoul, Republic of Korea
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10
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PARK JUHUI, KANG JOOHYUN, LEE YONGJIN, KIM KWANGIL, LEE TAESUP, KIM KYEONGMIN, PARK JIAE, KO YINOHK, YU DAEYEUL, NAHM SANGSOEP, JEON TAEJOO, PARK YOUNGSEO, LIM SANGMOO. Evaluation of diethylnitrosamine- or hepatitis B virus X gene-induced hepatocellular carcinoma with 18F-FDG PET/CT: A preclinical study. Oncol Rep 2014; 33:347-53. [DOI: 10.3892/or.2014.3575] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2014] [Accepted: 10/07/2014] [Indexed: 11/06/2022] Open
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11
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Vande Velde G, Himmelreich U, Neeman M. Reporter gene approaches for mapping cell fate decisions by MRI: promises and pitfalls. CONTRAST MEDIA & MOLECULAR IMAGING 2014; 8:424-31. [PMID: 24375898 DOI: 10.1002/cmmi.1590] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/23/2013] [Accepted: 11/29/2013] [Indexed: 12/15/2022]
Abstract
The central dogma of molecular biology, namely the process by which information encoded in the DNA serves as the template for transcriptional activation of specific mRNA resulting in temporal and spatial control of the translation of specific proteins, stands at the basis of normal and pathological cellular processes. Serving as the primary mechanism linking genotype to phenotype, it is clearly of significant interest for in vivo imaging. While classically, imaging revolutionized the ability to phenotype the anatomical and physiological impact of induction of changes in gene expression, the preceding molecular events remained invisible. Reporter gene-based imaging techniques provide a window for in vivo visualization of such transcriptional activation events. In addition to the widespread use of fluorescent and bioluminescent reporter genes and development of a number of reporter genes for positron emission tomography (PET) imaging, there has been significant progress in the development of reporter genes for MRI. With the development of strategies for cellular based therapies, such imaging tools could become central components for personalized patient monitoring.
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Affiliation(s)
- Greetje Vande Velde
- Biomedical MRI, KU Leuven, O&N I Herestraat 49 - box 505, 3000, Leuven, Belgium
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12
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Fang L, Cheng Q, Bai J, Qi YD, Liu JJ, Li LT, Zheng JN. An oncolytic adenovirus expressing interleukin-24 enhances antitumor activities in combination with paclitaxel in breast cancer cells. Mol Med Rep 2013; 8:1416-24. [PMID: 24042845 DOI: 10.3892/mmr.2013.1680] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2013] [Accepted: 08/21/2013] [Indexed: 11/06/2022] Open
Abstract
Oncolytic adenoviruses are a novel class of anticancer treatment, based upon their ability to replicate selectively within malignant cells resulting in cell lysis. The replication‑selective adenovirus, ZD55‑IL‑24, was constructed by harboring an E1B‑55 kDa deletion and arming with interleukin-24 (IL-24). The microtubule‑stabilizing drug paclitaxel (PTX) exhibits activity in relapsed cancer. In the present study, the synergistic antitumor effects of the combination of PTX and ZD55‑IL‑24 on breast cancer cells was investigated. The results demonstrated that there were different roles for PTX in the expression of transgenic mRNA and protein. ZD55‑IL‑24 combined with PTX induced marked growth inhibition of MDA‑MB‑231 and Bcap‑37 cells. PTX increased viral uptake and appeared not to alter the replication of ZD55‑IL‑24 in breast cancer cells. Annexin V‑fluorescein isothiocyanate/propidium iodide staining and the Hoechst 33258 assay indicated that ZD55‑IL‑24 induced an increase in the number of apoptotic cells when administered in combination with PTX. It was demonstrated that ZD55‑IL‑24 conjugated with PTX was highly concomitant, and increased proapoptotic proteins levels, activated caspase‑3, -7 and -9 and downregulated anti‑apoptotic proteins. These results suggested that ZD55‑IL‑24 in combination with PTX exhibited a markedly increased cytotoxic and apoptosis‑inducing effect in breast cancer cells. Thus, this chemo‑gene‑viro therapeutic strategy was demonstrated to be superior to conventional chemotherapy or gene‑viro therapy alone.
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Affiliation(s)
- Lin Fang
- Jiangsu Key Laboratory of Biological Cancer Therapy, Xuzhou Medical College, Xuzhou, Jiangsu 221002, P.R. China
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