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Anti-hepatoma Effect of DC2.4 Cells Transfected with Tumor-Associated Antigen Cdc25C In Vitro. Curr Med Sci 2022; 42:491-497. [PMID: 35292875 DOI: 10.1007/s11596-022-2556-x] [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: 12/14/2020] [Accepted: 10/25/2021] [Indexed: 11/03/2022]
Abstract
OBJECTIVE Cell division cyclin 25 homolog C (Cdc25C) is a tumor-associated antigen candidate gene, and this may be used as an effective target in cancer treatment. The present study aims to evaluate the lysis effect of cytotoxic T lymphocytes (CTLs) induced by dendritic cell line DC2.4 overexpressing Cdc25C, and the feasibility of Cdc25C as a component in hepatoma immunotherapy. METHODS The mouse Cdc25C gene was ligated into a lentiviral vector, and transfected into DC2.4 cells. The DC2.4 cell phenotype and cytokine secretion were determined by flow cytometry and ELISA, respectively. CD8+ T cells were sorted from the spleens of C57BL/6 mice using a magnetic bead sorting kit obtained from Miltenyi Biotech, Germany, and co-cultured with DC2.4 cells for one week as effector cells. Then, IL-2, granzyme B and perforin were detected in the CTL culture medium by ELISA. Next, time-resolved fluorescence immunoassay was used to detect the immune killing effect of Cdc25C-specific CTLs on target cells. Meanwhile, the effect of blocking MHC-I sites on target cells with a monoclonal anti-MHC-I antibody was evaluated. RESULTS The results revealed that Cdc25C could be stably overexpressed in DC2.4 cells by LV-Cdc25C infection. DC2.4 cells transfected with LV-Cdc25C secreted more IL-6, IL-12, TNF-α and IFN-γ, and had higher expression levels of CD40, CD86, CCR7 and MHC-II than unaltered DC2.4 cells. The elevated Cdc25C in dendritic cells also further increased the secretion of IL-2, granzyme B and perforin to elicit Cdc25C-specific CTLs, and induced the higher cytotoxicity in Hepa1-6 cell lines (P<0.05), but this had no effect on the target cells when MHC-I monoclonal antibodies were blocked. CONCLUSION DC2.4 cells transfected with LV-Cdc25C can induce specific CTLs, and result in a strong cellular immune response. The dendritic cells that overexpress Cdc25C may be useful for hepatoma immunotherapy.
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Heo H, Jo J, Jung JI, Han YM, Lee S, Kim SR, Kwon SH, Kim KN, Hwang BJ, Kee Y, Lee BD, Kang D, Her S. Improved dynamic monitoring of transcriptional activity during longitudinal analysis in the mouse brain. Biol Open 2019; 8:bio.037168. [PMID: 30341106 PMCID: PMC6361206 DOI: 10.1242/bio.037168] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Bioluminescence imaging has proven to be a highly sensitive technique for assessing in vitro transcriptional activity toward understanding gene regulation patterns; however, application of this technique is limited for brain research. In particular, the poor spatiotemporal resolution is a major hurdle for monitoring the dynamic changes of transcriptional activity in specific regions of the brain during longitudinal analysis of living animals. To overcome this limitation, in this study, we modified a lentivirus-based luciferase glucocorticoid receptor (GR) reporter by inserting destabilizing sequence genes, and then the reporter was stereotaxically injected in the mouse infralimbic prefrontal cortex (IL-PFC). Using this strategy, we could successfully pin-point and monitor the dynamic changes in GR activity in IL-PFC during normal stress adaptation. The modified reporter showed a 1.5-fold increase in temporal resolution for monitoring GR activity compared to the control, with respect to the intra-individual coefficients of variation. This novel in vivo method has broad applications, as it is readily adaptable to different types of transcription factor arrays as well spanning wide target regions of the brain to other organs and tissues.
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Affiliation(s)
- Hwon Heo
- Western Seoul Center, Korea Basic Science Institute, Seoul 03759, South Korea
| | - Juyeong Jo
- Western Seoul Center, Korea Basic Science Institute, Seoul 03759, South Korea.,Department of Life Science, Ewha Womans University, Seoul 03760, South Korea
| | - Jae In Jung
- Western Seoul Center, Korea Basic Science Institute, Seoul 03759, South Korea
| | - Young-Min Han
- Western Seoul Center, Korea Basic Science Institute, Seoul 03759, South Korea
| | - Seongsoo Lee
- Western Seoul Center, Korea Basic Science Institute, Seoul 03759, South Korea
| | - Song Rae Kim
- Chuncheon Center, Korea Basic Science Institute, Chuncheon 24341, South Korea
| | - Seung-Hae Kwon
- Chuncheon Center, Korea Basic Science Institute, Chuncheon 24341, South Korea
| | - Kil-Nam Kim
- Chuncheon Center, Korea Basic Science Institute, Chuncheon 24341, South Korea
| | - Byung Joon Hwang
- Department of Molecular Bioscience, College of Biomedical Science, Kangwon National University, Chuncheon 24341, South Korea
| | - Yun Kee
- Division of Biomedical Convergence, College of Biomedical Science, Kangwon National University, Chuncheon 24341, South Korea
| | - Byoung Dae Lee
- Department of Physiology, School of Medicine, Kyung Hee University, Seoul, 02447, South Korea
| | - Dongmin Kang
- Department of Life Science, Ewha Womans University, Seoul 03760, South Korea
| | - Song Her
- Western Seoul Center, Korea Basic Science Institute, Seoul 03759, South Korea
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Hong Z, Mao X, You J, Liu Z, Shi Y. An Evaluation of HER2-Positive Ovarian Carcinoma Xenografts: From a Novel Therapy to a Noninvasive Monitoring Method. Cancer Biother Radiopharm 2018; 33:411-419. [PMID: 30052070 DOI: 10.1089/cbr.2018.2516] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Affiliation(s)
- Zhihui Hong
- Department of Nuclear Medicine, The Second Affiliated Hospital of Soochow University, Suzhou City, People's Republic of China
| | - Xinping Mao
- Division of Medical Imageology, GanSu University of Chinese Medicine, Lanzhou City, People's Republic of China
| | - Jiaxi You
- Department of Nuclear Medicine, The Second Affiliated Hospital of Soochow University, Suzhou City, People's Republic of China
| | - Zengli Liu
- Department of Nuclear Medicine, The Second Affiliated Hospital of Soochow University, Suzhou City, People's Republic of China
| | - Yizhen Shi
- Department of Nuclear Medicine, The Second Affiliated Hospital of Soochow University, Suzhou City, People's Republic of China
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Au BC, Lee CJ, Lopez-Perez O, Foltz W, Felizardo TC, Wang JCM, Huang J, Fan X, Madden M, Goldstein A, Jaffray DA, Moloo B, McCart JA, Medin JA. Direct Lymph Node Vaccination of Lentivector/Prostate-Specific Antigen is Safe and Generates Tissue-Specific Responses in Rhesus Macaques. Biomedicines 2016; 4:biomedicines4010006. [PMID: 28536373 PMCID: PMC5344243 DOI: 10.3390/biomedicines4010006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2015] [Revised: 01/27/2016] [Accepted: 02/02/2016] [Indexed: 12/30/2022] Open
Abstract
Anti-cancer immunotherapy is emerging from a nadir and demonstrating tangible benefits to patients. A variety of approaches are now employed. We are invoking antigen (Ag)-specific responses through direct injections of recombinant lentivectors (LVs) that encode sequences for tumor-associated antigens into multiple lymph nodes to optimize immune presentation/stimulation. Here we first demonstrate the effectiveness and antigen-specificity of this approach in mice challenged with prostate-specific antigen (PSA)-expressing tumor cells. Next we tested the safety and efficacy of this approach in two cohorts of rhesus macaques as a prelude to a clinical trial application. Our vector encodes the cDNA for rhesus macaque PSA and a rhesus macaque cell surface marker to facilitate vector titering and tracking. We utilized two independent injection schemas demarcated by the timing of LV administration. In both cohorts we observed marked tissue-specific responses as measured by clinical evaluations and magnetic resonance imaging of the prostate gland. Tissue-specific responses were sustained for up to six months-the end-point of the study. Control animals immunized against an irrelevant Ag were unaffected. We did not observe vector spread in test or control animals or perturbations of systemic immune parameters. This approach thus offers an "off-the-shelf" anti-cancer vaccine that could be made at large scale and injected into patients-even on an out-patient basis.
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Affiliation(s)
- Bryan C Au
- University Health Network (UHN), Toronto, ON M5G 2C4, Canada.
| | - Chyan-Jang Lee
- University Health Network (UHN), Toronto, ON M5G 2C4, Canada.
| | | | - Warren Foltz
- Radiation Medicine Program, Princess Margaret Hospital, UHN, Toronto, ON M5G 2M9, Canada.
| | | | - James C M Wang
- University Health Network (UHN), Toronto, ON M5G 2C4, Canada.
| | - Ju Huang
- University Health Network (UHN), Toronto, ON M5G 2C4, Canada.
| | - Xin Fan
- University Health Network (UHN), Toronto, ON M5G 2C4, Canada.
| | - Melissa Madden
- Animal Resources Centre, UHN, Toronto, ON M5G 1L7, Canada.
| | | | - David A Jaffray
- Radiation Medicine Program, Princess Margaret Hospital, UHN, Toronto, ON M5G 2M9, Canada.
| | - Badru Moloo
- Animal Resources Centre, UHN, Toronto, ON M5G 1L7, Canada.
| | - J Andrea McCart
- University Health Network (UHN), Toronto, ON M5G 2C4, Canada.
| | - Jeffrey A Medin
- University Health Network (UHN), Toronto, ON M5G 2C4, Canada.
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Abstract
Basic science advances in cancer immunotherapy have resulted in various treatments that have recently shown success in the clinic. Many of these therapies require the insertion of genes into cells to directly kill them or to redirect the host's cells to induce potent immune responses. Other analogous therapies work by modifying effector cells for improved targeting and enhanced killing of tumor cells. Initial studies done using γ-retroviruses were promising, but safety concerns centered on the potential for insertional mutagenesis have highlighted the desire to develop other options for gene delivery. Lentiviral vectors (LVs) have been identified as potentially more effective and safer alternative delivery vehicles. LVs are now in use in clinical trials for many different types of inherited and acquired disorders, including cancer. This review will discuss current knowledge of LVs and the applications of this viral vector-based delivery vehicle to cancer immunotherapy.
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Affiliation(s)
- Robyn Aa Oldham
- Department of Medical Biophysics, University of Toronto, 27 King's College Circle, Toronto, ON M5S, Canada
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Yang E, Wang F, Xu Y, Wang H, Hu Y, Shen H, Chen ZW. A lentiviral vector-based therapeutic vaccine encoding Ag85B-Rv3425 potently increases resistance to acute tuberculosis infection in mice. Acta Biochim Biophys Sin (Shanghai) 2015; 47:588-96. [PMID: 26112017 DOI: 10.1093/abbs/gmv059] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2015] [Accepted: 04/16/2015] [Indexed: 11/13/2022] Open
Abstract
Few treatment options for multidrug-resistant tuberculosis (TB) and extensively drug-resistant TB call attention to the development of novel therapeutic approaches for TB. Therapeutic vaccines are promising candidates because they can induce antigen-specific cellular immune responses, which play an important role in the elimination of Mycobacterium tuberculosis (MTB). In this study, a novel lentiviral vector therapeutic vaccine for delivering MTB-specific fusion protein Ag85B-Rv3425 was constructed. Results showed that one single-injection of this recombinant lentivirus vaccine could trigger antigen-specific Th1-type immune responses in mice. More importantly, mice with acute infection benefited a lot from a single-dose administration of this vaccine by markedly reduced MTB burdens in lungs and spleens as well as attenuated lesions in lungs compared with untreated mice. These results displayed good prospects of this novel vaccine for the immunotherapy of TB.
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Affiliation(s)
- Enzhuo Yang
- Unit of Anti-Tuberculosis Immunity, Key Laboratory of Molecular Virology and Immunology, Institute Pasteur of Shanghai, Chinese Academy of Sciences, Shanghai 200031, China
| | - Feifei Wang
- Department of Medical Microbiology and Parasitology, Shanghai Medical College, Fudan University, Shanghai 200032, China
| | - Ying Xu
- State Key Laboratory of Genetic Engineering, School of Life Sciences, Fudan University, Shanghai 200433, China
| | - Honghai Wang
- State Key Laboratory of Genetic Engineering, School of Life Sciences, Fudan University, Shanghai 200433, China
| | - Yong Hu
- Department of Neonatology, Shanghai Children's Hospital, Shanghai Jiao Tong University, Shanghai 200040, China
| | - Hongbo Shen
- Unit of Anti-Tuberculosis Immunity, Key Laboratory of Molecular Virology and Immunology, Institute Pasteur of Shanghai, Chinese Academy of Sciences, Shanghai 200031, China
| | - Zheng W Chen
- Unit of Anti-Tuberculosis Immunity, Key Laboratory of Molecular Virology and Immunology, Institute Pasteur of Shanghai, Chinese Academy of Sciences, Shanghai 200031, China
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HER2/neu: an increasingly important therapeutic target. Part 1: basic biology & therapeutic armamentarium. ACTA ACUST UNITED AC 2014. [DOI: 10.4155/cli.14.57] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Wang JCM, Felizardo TC, Au BCY, Fowler DH, Dekaban GA, Medin JA. Engineering lentiviral vectors for modulation of dendritic cell apoptotic pathways. Virol J 2013; 10:240. [PMID: 23870437 PMCID: PMC3723442 DOI: 10.1186/1743-422x-10-240] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2013] [Accepted: 07/17/2013] [Indexed: 11/23/2022] Open
Abstract
Background Dendritic cells (DCs) are promising mediators of anti-tumor immune responses due to their potent antigen-presentation capacity. Unfortunately, cancer cells can often disarm differentiated DCs by rendering them incapable of maturation or by promoting their apoptosis. DC vaccine regimens attempt to generate functional DCs and preload them with Tumor-Associated Antigens (TAAs) to target various malignancies. Despite these efforts, the efficacy of DC vaccines in clinical trials is still rather disappointing to date. In addition to undergoing cancer-induced apoptosis, it is well established that DCs are intrinsically short-lived cell types. It is likely that a significant portion of infused DCs undergo apoptosis prior to locating and activating naïve TAA-reactive T cells. Methods In our current study, we constructed and investigated novel bicistronic lentivectors (LVs) encoding the cDNA for the xeno-TAA, rat HER-2/neu (rHER-2), along with five candidate mouse DC survival factors (c-FLIPS, c-FLIPL, Bcl-XL, M11L, and AKT-1) that operate in both the extrinsic and intrinsic cycles of apoptosis. The murine DC cell line, DC2.4 was transduced separately with each novel LV construct. Infected cells were enriched via flow cytometric methods based on rHER-2 expression. Transduced DC2.4 cell lines were then exposed to Fetal Calf Serum (FCS) withdrawal and to specific pharmacological apoptosis-inducing agents. DC2.4 cell death was assayed based on Annexin V and PI double-positive staining via flow cytometry. The phenotype and function of transduced DC2.4 cells and primary bone marrow-derived DCs were then assessed via expression and secretion of DC markers and cytokines, respectively. Results DC2.4 cells transduced with LVs encoding cDNAs for c-FLIPS, c-FLIPL, Bcl-XL, and M11L were protected from apoptosis when exposed to low FCS-containing culture media. When treated with an anti-CD95 antibody, only DC2.4 cells transduced with LVs encoding c-FLIPS and c-FLIPL were protected from apoptosis. In contrast, only DC2.4 cells transduced with LVs encoding Bcl-XL and M11L were protected from effects of staurosporine (STS) treatment. Also, LV-modified DCs maintained their original phenotype and function. Conclusions We present evidence that by employing novel recombinant bicistronic LVs we can simultaneously load DCs with a relevant TAA and block apoptosis; thereby confirming the usage of such LVs in the modulation of DC lifespan and function.
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Affiliation(s)
- James C M Wang
- University Health Network, Canadian Blood Services Building, 67 College St, Room 406, Toronto, Ontario M5G2M1, Canada
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Felizardo TC, Foley J, Steed K, Dropulic B, Amarnath S, Medin JA, Fowler DH. Harnessing autophagy for cell fate control gene therapy. Autophagy 2013; 9:1069-79. [PMID: 23633667 DOI: 10.4161/auto.24639] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
We hypothesized that rapamycin, through induction of autophagy and promotion of an antiapoptotic phenotype, would permit lentiviral (LV)-based transgene delivery to human T-Rapa cells, which are being tested in phase II clinical trials in the setting of allogeneic hematopoietic cell transplantation. Manufactured T-Rapa cells were exposed to supernatant enriched for a LV vector encoding a fusion protein consisting of truncated CD19 (for cell surface marking) and DTYMK/TMPKΔ, which provides "cell-fate control" due to its ability to phosphorylate (activate) AZT prodrug. LV-transduction in rapamycin-treated T-Rapa cells: (1) resulted in mitochondrial autophagy and a resultant antiapoptotic phenotype, which was reversed by the autophagy inhibitor 3-MA; (2) yielded changes in MAP1LC3B and SQSTM1 expression, which were reversed by 3-MA; and (3) increased T-Rapa cell expression of the CD19-DTYMKΔ fusion protein, despite their reduced proliferative status. Importantly, although the transgene-expressing T-Rapa cells expressed an antiapoptotic phenotype, they were highly susceptible to cell death via AZT exposure both in vitro and in vivo (in a human-into-mouse xenogeneic transplantation model). Therefore, rapamycin induction of T cell autophagy can be used for gene therapy applications, including the CD19-DTYMKΔ cell-fate control axis to improve the safety of T cell immuno-gene therapy.
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Affiliation(s)
- Tania C Felizardo
- Experimental Transplantation and Immunology Branch; National Cancer Institute; National Institutes of Health; Bethesda, MD USA
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Dendritic cells the tumor microenvironment and the challenges for an effective antitumor vaccination. J Biomed Biotechnol 2012; 2012:425476. [PMID: 22505809 PMCID: PMC3312387 DOI: 10.1155/2012/425476] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2011] [Revised: 10/28/2011] [Accepted: 11/11/2011] [Indexed: 12/23/2022] Open
Abstract
Many clinical trials have been carried out or are in progress to assess the therapeutic potential of dendritic-cell- (DC-) based vaccines on cancer patients, and recently the first DC-based vaccine for human cancer was approved by the FDA. Herewith, we describe the general characteristics of DCs and different strategies to generate effective antitumor DC vaccines. In recent years, the relevance of the tumor microenvironment in the progression of cancer has been highlighted. It has been shown that the tumor microenvironment is capable of inactivating various components of the immune system responsible for tumor clearance. In particular, the effect of the tumor microenvironment on antigen-presenting cells, such as DCs, does not only render these immune cells unable to induce specific immune responses, but also turns them into promoters of tumor growth. We also describe strategies likely to increase the efficacy of DC vaccines by reprogramming the immunosuppressive nature of the tumor microenvironment.
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