1
|
Proskurina A, Nikolin V, Popova N, Varaksin N, Ryabicheva T, Ershova E, Kostyuk S, Leplina O, Ostanin A, Chernykh E, Bogachev S. Comparing the Biological Properties of Double-Stranded DNA Extracted from Human and Porcine Placenta and Salmon Sperm. Rep Biochem Mol Biol 2023; 11:577-589. [PMID: 37131888 PMCID: PMC10149128 DOI: 10.52547/rbmb.11.4.577] [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: 07/30/2022] [Accepted: 10/09/2022] [Indexed: 05/04/2023]
Abstract
Background Double-stranded fragmented extracellular DNA is a participant, inducer, and indicator of various processes occurring in the organism. When investigating the properties of extracellular DNA, the question regarding the specificity of exposure to DNA from different sources has always been raised. The aim of this study was to perform comparative assessment of biological properties of double-stranded DNA obtained from the human placenta, porcine placenta and salmon sperm. Methods The intensity of leukocyte-stimulating effect of different dsDNA was assessed in mice after cyclophosphamide-induced cytoreduction. The stimulatory effect of different dsDNA on maturation and functions of human dendritic cells and the intensity of cytokine production by human whole blood cells was analyzed ex vivo. The oxidation level of the dsDNA was also compared. Results Human placental DNA exhibited the strongest leukocyte-stimulating effect. DNA extracted from human and porcine placenta exhibited similar stimulatory action on maturation of dendritic cells, allostimulatory capacity, and ability of dendritic cells to induce generation of cytotoxic CD8+CD107a+ T cells in the mixed leukocyte reaction. DNA extracted from salmon sperm stimulated the maturation of dendritic cells, while having no effect on their allostimulatory capacity. DNA extracted from human and porcine placenta was shown to exhibit a stimulatory effect on cytokine secretion by human whole blood cells. The observed differences between the DNA preparations can be caused by the total methylation level and are not related to differences in oxidation level of DNA molecules. Conclusions Human placental DNA exhibited the maximum combination of all biological effects.
Collapse
Affiliation(s)
- Anastasia Proskurina
- Institute of Cytology and Genetics, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, 630090, Russia.
| | - Valeriy Nikolin
- Institute of Cytology and Genetics, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, 630090, Russia.
| | - Nelly Popova
- Institute of Cytology and Genetics, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, 630090, Russia.
| | - Nikolay Varaksin
- JSC “Vector-Best”, Koltsovo, Novosibirsk Region, 630559, Russia.
| | | | | | | | - Olga Leplina
- Research Institute of Fundamental and Clinical Immunology, Novosibirsk, 630099, Russia.
| | - Alexandr Ostanin
- Research Institute of Fundamental and Clinical Immunology, Novosibirsk, 630099, Russia.
| | - Elena Chernykh
- Research Institute of Fundamental and Clinical Immunology, Novosibirsk, 630099, Russia.
| | - Sergey Bogachev
- Institute of Cytology and Genetics, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, 630090, Russia.
- Corresponding author: Sergey Bogachev; Tel: +7 383 363 49 63; E-mail:
| |
Collapse
|
2
|
Ruzanova V, Proskurina A, Efremov Y, Kirikovich S, Ritter G, Levites E, Dolgova E, Potter E, Babaeva O, Sidorov S, Taranov O, Ostanin A, Chernykh E, Bogachev S. Chronometric Administration of Cyclophosphamide and a Double-Stranded DNA-Mix at Interstrand Crosslinks Repair Timing, Called "Karanahan" Therapy, Is Highly Efficient in a Weakly Immunogenic Lewis Carcinoma Model. Pathol Oncol Res 2022; 28:1610180. [PMID: 35693632 PMCID: PMC9185167 DOI: 10.3389/pore.2022.1610180] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2021] [Accepted: 04/27/2022] [Indexed: 12/12/2022]
Abstract
Background and Aims: A new technology based on the chronometric administration of cyclophosphamide and complex composite double-stranded DNA-based compound, which is scheduled in strict dependence on interstrand crosslinks repair timing, and named “Karanahan”, has been developed. Being applied, this technology results in the eradication of tumor-initiating stem cells and full-scale apoptosis of committed tumor cells. In the present study, the efficacy of this novel approach has been estimated in the model of Lewis carcinoma. Methods: To determine the basic indicative parameters for the approach, the duration of DNA repair in tumor cells, as well as their distribution along the cell cycle, have been assessed. Injections were done into one or both tumors in femoral region of the engrafted mice in accordance with the developed regimen. Four series of experiments were carried out at different periods of time. The content of poorly differentiated CD34+/TAMRA+ cells in the bone marrow and peripheral blood has been determined. Immunostaining followed by the flow cytometry was used to analyze the subpopulations of immune cells. Results: The high antitumor efficacy of the new technology against the developed experimental Lewis carcinoma was shown. It was found that the therapy efficacy depended on the number of tumor growth sites, seasonal and annual peculiarities. In some experiments, a long-term remission has been reached in 70% of animals with a single tumor and in 60% with two tumors. In mice with two developed grafts, mobilization capabilities of both poorly differentiated hematopoietic cells of the host and tumor stem-like cells decrease significantly. Being applied, this new technology was shown to activate a specific immune response. There is an increase in the number of NK cell populations in the blood, tumor, and spleen, killer T cells and T helper cells in the tumor and spleen, CD11b+Ly-6C+ and CD11b+Ly-6G+ cells in the tumor. A population of mature dendritic cells is found in the tumor. Conclusion: The performed experiments indicate the efficacy of the Karanahan approach against incurable Lewis carcinoma. Thus, the discussed therapy is a new approach for treating experimental neoplasms, which has a potential as a personalized anti-tumor therapeutic approach in humans.
Collapse
Affiliation(s)
- Vera Ruzanova
- Laboratory of Induced Cellular Processes, Institute of Cytology and Genetics of the Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia.,Department of Natural Sciences, Novosibirsk National Research State University, Novosibirsk, Russia
| | - Anastasia Proskurina
- Laboratory of Induced Cellular Processes, Institute of Cytology and Genetics of the Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia
| | - Yaroslav Efremov
- Department of Natural Sciences, Novosibirsk National Research State University, Novosibirsk, Russia.,Common Use Center for Microscopic Analysis of Biological Objects SB RAS, Institute of Cytology and Genetics of the Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia
| | - Svetlana Kirikovich
- Laboratory of Induced Cellular Processes, Institute of Cytology and Genetics of the Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia
| | - Genrikh Ritter
- Laboratory of Induced Cellular Processes, Institute of Cytology and Genetics of the Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia
| | - Evgenii Levites
- Laboratory of Induced Cellular Processes, Institute of Cytology and Genetics of the Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia
| | - Evgenia Dolgova
- Laboratory of Induced Cellular Processes, Institute of Cytology and Genetics of the Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia
| | - Ekaterina Potter
- Laboratory of Induced Cellular Processes, Institute of Cytology and Genetics of the Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia
| | - Oksana Babaeva
- Oncology Department, Municipal Hospital No. 1, Novosibirsk, Russia
| | - Sergey Sidorov
- Department of Natural Sciences, Novosibirsk National Research State University, Novosibirsk, Russia.,Oncology Department, Municipal Hospital No. 1, Novosibirsk, Russia
| | - Oleg Taranov
- Laboratory of Microscopic Research, State Research Center of Virology and Biotechnology "Vector", Koltsovo, Russia
| | - Alexandr Ostanin
- Laboratory of Cellular Immunotherapy, Research Institute of Fundamental and Clinical Immunology, Novosibirsk, Russia
| | - Elena Chernykh
- Laboratory of Cellular Immunotherapy, Research Institute of Fundamental and Clinical Immunology, Novosibirsk, Russia
| | - Sergey Bogachev
- Laboratory of Induced Cellular Processes, Institute of Cytology and Genetics of the Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia
| |
Collapse
|
3
|
Defective Regulation of Membrane TNFα Expression in Dendritic Cells of Glioblastoma Patients Leads to the Impairment of Cytotoxic Activity against Autologous Tumor Cells. Int J Mol Sci 2020; 21:ijms21082898. [PMID: 32326230 PMCID: PMC7215742 DOI: 10.3390/ijms21082898] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2020] [Revised: 03/29/2020] [Accepted: 04/18/2020] [Indexed: 12/14/2022] Open
Abstract
Besides an antigen-presenting function and ability to induce antitumor immune responses, dendritic cells (DCs) possess a direct tumoricidal activity. We previously reported that monocyte-derived IFNα-induced DCs (IFN-DCs) of glioblastoma multiforme patients express low levels of membrane TNFα molecule (mTNFα) and have impaired TNFα/TNF-R1-mediated cytotoxicity against immortalized tumor cell line HEp-2. However, whether the observed defect could affect killer activity of glioma patient DCs against autologous tumor cells remained unclear. Here, we show that donor IFN-DCs possess cytotoxic activity against glioblastoma cell lines derived from a primary tumor culture. Granule-mediated and TNFα/TNF-R1-dependent pathways were established as the main mechanisms underlying cytotoxic activity of IFN-DCs. Glioblastoma patient IFN-DCs showed lower cytotoxicity against autologous glioblastoma cells sensitive to TNFα/TNFR1-mediated lysis, which was associated with low TNFα mRNA expression and high TACE/ADAM-17 enzyme activity. Recombinant IL-2 (rIL-2) and human double-stranded DNA (dsDNA) increased 1.5-fold cytotoxic activity of patient IFN-DCs against autologous glioblastoma cells. dsDNA, but not rIL-2, enhanced the expression of TNFα mRNA and decreased expression and activity of TACE/ADAM-17 enzyme. In addition, dsDNA and rIL-2 stimulated the expression of perforin and granzyme B (in the presence of dsDNA), suggesting the possibility of enhancing DC cytotoxicity against autologous glioblastoma cells via various mechanisms.
Collapse
|
4
|
Dolgova EV, Petrova DD, Proskurina AS, Ritter GS, Kisaretova PE, Potter EA, Efremov YR, Bayborodin SI, Karamysheva TV, Romanenko MV, Netesov SV, Taranov OS, Ostanin AA, Chernykh ER, Bogachev SS. Identification of the xenograft and its ascendant sphere-forming cell line as belonging to EBV-induced lymphoma, and characterization of the status of sphere-forming cells. Cancer Cell Int 2019; 19:120. [PMID: 31080361 PMCID: PMC6503443 DOI: 10.1186/s12935-019-0842-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2019] [Accepted: 04/27/2019] [Indexed: 12/15/2022] Open
Abstract
Background We have characterized the human cell line arised from the Epstein–Barr virus (EBV) positive multiple myeloma aspirate subjected to the long-term cultivation. This cell line has acquired the ability to form free-floating spheres and to produce a xenograft upon transplantation into NOD/SCID mice. Methods Cells from both in vitro culture and developed xenografts were investigated with a number of analytical approaches, including pathomorphological analysis, FISH analysis, and analysis of the surface antigens and of the VDJ locus rearrangement. Results The obtained results, as well as the confirmed presence of EBV, testify that both biological systems are derived from B-cells, which, in turn, is a progeny of the EBV-transformed B-cellular clone that supplanted the primordial multiple myeloma cells. Next we assessed whether cells that (i) were constantly present in vitro in the investigated cell line, (ii) were among the sphere-forming cells, and (iii) were capable of internalizing a fluorescent TAMRA-labeled DNA probe (TAMRA+ cells) belonged to one of the three types of undifferentiated bone marrow cells of a multiple myeloma patient: CD34+ hematopoietic stem cells, CD90+ mesenchymal stem cells, and clonotypic multiple myeloma cell. Conclusion TAMRA+ cells were shown to constitute the fourth independent subpopulation of undifferentiated bone marrow cells of the multiple myeloma patient. We have demonstrated the formation of ectopic contacts between TAMRA+ cells and cells of other types in culture, in particular with CD90+ mesenchymal stem cells, followed by the transfer of some TAMRA+ cell material into the contacted cell. Electronic supplementary material The online version of this article (10.1186/s12935-019-0842-x) contains supplementary material, which is available to authorized users.
Collapse
Affiliation(s)
- Evgeniya V Dolgova
- 1Institute of Cytology and Genetics, Siberian Branch of the Russian Academy of Sciences, 10 Lavrentiev Ave., Novosibirsk, 630090 Russia
| | | | - Anastasia S Proskurina
- 1Institute of Cytology and Genetics, Siberian Branch of the Russian Academy of Sciences, 10 Lavrentiev Ave., Novosibirsk, 630090 Russia
| | - Genrikh S Ritter
- 1Institute of Cytology and Genetics, Siberian Branch of the Russian Academy of Sciences, 10 Lavrentiev Ave., Novosibirsk, 630090 Russia.,2Novosibirsk State University, Novosibirsk, Russia
| | - Polina E Kisaretova
- 1Institute of Cytology and Genetics, Siberian Branch of the Russian Academy of Sciences, 10 Lavrentiev Ave., Novosibirsk, 630090 Russia.,2Novosibirsk State University, Novosibirsk, Russia
| | - Ekaterina A Potter
- 1Institute of Cytology and Genetics, Siberian Branch of the Russian Academy of Sciences, 10 Lavrentiev Ave., Novosibirsk, 630090 Russia
| | - Yaroslav R Efremov
- 1Institute of Cytology and Genetics, Siberian Branch of the Russian Academy of Sciences, 10 Lavrentiev Ave., Novosibirsk, 630090 Russia.,2Novosibirsk State University, Novosibirsk, Russia
| | - Sergey I Bayborodin
- 1Institute of Cytology and Genetics, Siberian Branch of the Russian Academy of Sciences, 10 Lavrentiev Ave., Novosibirsk, 630090 Russia
| | - Tatiana V Karamysheva
- 1Institute of Cytology and Genetics, Siberian Branch of the Russian Academy of Sciences, 10 Lavrentiev Ave., Novosibirsk, 630090 Russia
| | | | | | - Oleg S Taranov
- 3State Research Center of Virology and Biotechnology "Vector", Koltsovo, Novosibirsk, Russia
| | - Aleksandr A Ostanin
- 4Research Institute of Fundamental and Clinical Immunology, Novosibirsk, Russia
| | - Elena R Chernykh
- 4Research Institute of Fundamental and Clinical Immunology, Novosibirsk, Russia
| | - Sergey S Bogachev
- 1Institute of Cytology and Genetics, Siberian Branch of the Russian Academy of Sciences, 10 Lavrentiev Ave., Novosibirsk, 630090 Russia
| |
Collapse
|
5
|
Kirikovich SS, Taranov OS, Omigov VV, Potter EA, Dolgova EV, Proskurina AS, Efremov YR, Bogachev SS. Ultrastructural analysis of the Krebs-2 ascites cancer cells treated with extracellular double-stranded DNA preparation. Ultrastruct Pathol 2019; 43:56-65. [PMID: 30758240 DOI: 10.1080/01913123.2019.1575499] [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: 02/05/2023]
Abstract
Electron-microscopic analysis of the ultrastructure of the Krebs-2 carcinoma ascites cells in the first 90 min immediately after their exposure to fragmented double-stranded DNA has been performed. Morphological attributes of the treated cancer cells indicate the induction in these cells of destructive processes of presumably apoptotic type. The predominance of dystrophic-destructive changes in cells after the addition of DNA is supposed to be a consequence of the disturbance in metabolic processes caused by the experimental action.
Collapse
Affiliation(s)
- Svetlana S Kirikovich
- a Institute of Cytology and Genetics , Siberian Branch of the Russian Academy of Sciences , Novosibirsk , Russia
| | - Oleg S Taranov
- b State Research Center of Virology and Biotechnology VECTOR , Rospotrebnadzor , Novosibirsk region , Russia
| | - Vladimir V Omigov
- b State Research Center of Virology and Biotechnology VECTOR , Rospotrebnadzor , Novosibirsk region , Russia
| | - Ekaterina A Potter
- a Institute of Cytology and Genetics , Siberian Branch of the Russian Academy of Sciences , Novosibirsk , Russia
| | - Evgenia V Dolgova
- a Institute of Cytology and Genetics , Siberian Branch of the Russian Academy of Sciences , Novosibirsk , Russia
| | - Anastasia S Proskurina
- a Institute of Cytology and Genetics , Siberian Branch of the Russian Academy of Sciences , Novosibirsk , Russia
| | - Yaroslav R Efremov
- a Institute of Cytology and Genetics , Siberian Branch of the Russian Academy of Sciences , Novosibirsk , Russia.,c Department of natural sciences , Novosibirsk State University , Novosibirsk , Russia
| | - Sergey S Bogachev
- a Institute of Cytology and Genetics , Siberian Branch of the Russian Academy of Sciences , Novosibirsk , Russia
| |
Collapse
|
6
|
Proskurina AS, Gvozdeva TS, Potter EA, Dolgova EV, Orishchenko KE, Nikolin VP, Popova NA, Sidorov SV, Chernykh ER, Ostanin AA, Leplina OY, Dvornichenko VV, Ponomarenko DM, Soldatova GS, Varaksin NA, Ryabicheva TG, Uchakin PN, Rogachev VA, Shurdov MA, Bogachev SS. Five-year disease-free survival among stage II-IV breast cancer patients receiving FAC and AC chemotherapy in phase II clinical trials of Panagen. BMC Cancer 2016; 16:651. [PMID: 27538465 PMCID: PMC4990870 DOI: 10.1186/s12885-016-2711-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2016] [Accepted: 08/11/2016] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND We report on the results of a phase II clinical trial of Panagen (tablet form of fragmented human DNA preparation) in breast cancer patients (placebo group n = 23, Panagen n = 57). Panagen was administered as an adjuvant leukoprotective agent in FAC and AC chemotherapy regimens. Pre-clinical studies clearly indicate that Panagen acts by activating dendritic cells and induces the development of adaptive anticancer immune response. METHODS We analyzed 5-year disease-free survival of patients recruited into the trial. RESULTS Five-year disease-free survival in the placebo group was 40 % (n = 15), compared with the Panagen arm - 53 % (n = 51). Among stage III patients, disease-free survival was 25 and 52 % for placebo (n = 8) and Panagen (n = 25) groups, respectively. Disease-free survival of patients with IIIB + C stage was as follows: placebo (n = 6)-17 % vs Panagen (n = 18)-50 %. CONCLUSIONS Disease-free survival rate (17 %) of patients with IIIB + C stage breast cancer receiving standard of care therapy is within the global range. Patients who additionally received Panagen demonstrate a significantly improved disease-free survival rate of 50 %. This confirms anticancer activity of Panagen. TRIAL REGISTRATION ClinicalTrials.gov NCT02115984 from 04/07/2014.
Collapse
Affiliation(s)
- Anastasia S Proskurina
- Institute of Cytology and Genetics, Siberian Branch of the Russian Academy of Sciences, 10 Lavrentieva Ave, Novosibirsk, 630090, Russia
| | | | - Ekaterina A Potter
- Institute of Cytology and Genetics, Siberian Branch of the Russian Academy of Sciences, 10 Lavrentieva Ave, Novosibirsk, 630090, Russia
| | - Evgenia V Dolgova
- Institute of Cytology and Genetics, Siberian Branch of the Russian Academy of Sciences, 10 Lavrentieva Ave, Novosibirsk, 630090, Russia
| | - Konstantin E Orishchenko
- Institute of Cytology and Genetics, Siberian Branch of the Russian Academy of Sciences, 10 Lavrentieva Ave, Novosibirsk, 630090, Russia
| | - Valeriy P Nikolin
- Institute of Cytology and Genetics, Siberian Branch of the Russian Academy of Sciences, 10 Lavrentieva Ave, Novosibirsk, 630090, Russia
| | - Nelly A Popova
- Institute of Cytology and Genetics, Siberian Branch of the Russian Academy of Sciences, 10 Lavrentieva Ave, Novosibirsk, 630090, Russia.,Novosibirsk State University, Novosibirsk, 630090, Russia
| | - Sergey V Sidorov
- Novosibirsk State University, Novosibirsk, 630090, Russia.,Oncology Department of Municipal Hospital No 1, Novosibirsk, 630047, Russia
| | - Elena R Chernykh
- Institute of Clinical Immunology, Siberian Branch of the Russian Academy of Medical Sciences, Novosibirsk, 630099, Russia
| | - Alexandr A Ostanin
- Institute of Clinical Immunology, Siberian Branch of the Russian Academy of Medical Sciences, Novosibirsk, 630099, Russia
| | - Olga Y Leplina
- Institute of Clinical Immunology, Siberian Branch of the Russian Academy of Medical Sciences, Novosibirsk, 630099, Russia
| | - Victoria V Dvornichenko
- Irkutsk State Medical Academy of Postgraduate Education, Irkutsk, 664049, Russia.,Regional Oncology Dispensary, Irkutsk, 664035, Russia
| | - Dmitriy M Ponomarenko
- Irkutsk State Medical Academy of Postgraduate Education, Irkutsk, 664049, Russia.,Regional Oncology Dispensary, Irkutsk, 664035, Russia
| | - Galina S Soldatova
- Novosibirsk State University, Novosibirsk, 630090, Russia.,Clinic Department of the Central Clinical Hospital, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, 630090, Russia
| | | | | | | | - Vladimir A Rogachev
- Institute of Cytology and Genetics, Siberian Branch of the Russian Academy of Sciences, 10 Lavrentieva Ave, Novosibirsk, 630090, Russia
| | | | - Sergey S Bogachev
- Institute of Cytology and Genetics, Siberian Branch of the Russian Academy of Sciences, 10 Lavrentieva Ave, Novosibirsk, 630090, Russia.
| |
Collapse
|
7
|
Dolgova EV, Potter EA, Proskurina AS, Minkevich AM, Chernych ER, Ostanin AA, Efremov YR, Bayborodin SI, Nikolin VP, Popova NA, Kolchanov NA, Bogachev SS. Properties of internalization factors contributing to the uptake of extracellular DNA into tumor-initiating stem cells of mouse Krebs-2 cell line. Stem Cell Res Ther 2016; 7:76. [PMID: 27225522 PMCID: PMC4881173 DOI: 10.1186/s13287-016-0338-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2016] [Revised: 04/20/2016] [Accepted: 05/06/2016] [Indexed: 01/14/2023] Open
Abstract
Background Previously, we demonstrated that poorly differentiated cells of various origins, including tumor-initiating stem cells present in the ascites form of mouse cancer cell line Krebs-2, are capable of naturally internalizing both linear double-stranded DNA and circular plasmid DNA. Methods The method of co-incubating Krebs-2 cells with extracellular plasmid DNA (pUC19) or TAMRA-5’-dUTP-labeled polymerase chain reaction (PCR) product was used. It was found that internalized plasmid DNA isolated from Krebs-2 can be transformed into competent Escherichia coli cells. Thus, the internalization processes taking place in the Krebs-2 cell subpopulation have been analyzed and compared, as assayed by E. coli colony formation assay (plasmid DNA) and cytofluorescence (TAMRA-DNA). Results We showed that extracellular DNA both in the form of plasmid DNA and a PCR product is internalized by the same subpopulation of Krebs-2 cells. We found that the saturation threshold for Krebs-2 ascites cells is 0.5 μg DNA/106 cells. Supercoiled plasmid DNA, human high-molecular weight DNA, and 500 bp PCR fragments are internalized into the Krebs-2 tumor-initiating stem cells via distinct, non-competing internalization pathways. Under our experimental conditions, each cell may harbor 340–2600 copies of intact plasmid material, or up to 3.097 ± 0.044×106 plasmid copies (intact or not), as detected by quantitative PCR. Conclusion The internalization dynamics of extracellular DNA, copy number of the plasmids taken up by the cells, and competition between different types of double-stranded DNA upon internalization into tumor-initiating stem cells of mouse ascites Krebs-2 have been comprehensively analyzed. Investigation of the extracellular DNA internalization into tumor-initiating stem cells is an important part of understanding their properties and possible destruction mechanisms. For example, a TAMRA-labeled DNA probe may serve as an instrument to develop a target for the therapy of cancer, aiming at elimination of tumor stem cells, as well as developing a straightforward test system for the quantification of poorly differentiated cells, including tumor-initiating stem cells, in the bulk tumor sample (biopsy or surgery specimen).
Collapse
Affiliation(s)
- Evgeniya V Dolgova
- Institute of Cytology and Genetics, Siberian Branch of the Russian Academy of Sciences, 10 Lavrentieva Ave., Novosibirsk, 630090, Russia.
| | - Ekaterina A Potter
- Institute of Cytology and Genetics, Siberian Branch of the Russian Academy of Sciences, 10 Lavrentieva Ave., Novosibirsk, 630090, Russia
| | - Anastasiya S Proskurina
- Institute of Cytology and Genetics, Siberian Branch of the Russian Academy of Sciences, 10 Lavrentieva Ave., Novosibirsk, 630090, Russia
| | - Alexandra M Minkevich
- Institute of Cytology and Genetics, Siberian Branch of the Russian Academy of Sciences, 10 Lavrentieva Ave., Novosibirsk, 630090, Russia
| | - Elena R Chernych
- Institute of Clinical Immunology, Siberian Branch of the Russian Academy of Medical Sciences, 14 Yadrintsevskaya Street, Novosibirsk, 630099, Russia
| | - Alexandr A Ostanin
- Institute of Clinical Immunology, Siberian Branch of the Russian Academy of Medical Sciences, 14 Yadrintsevskaya Street, Novosibirsk, 630099, Russia
| | - Yaroslav R Efremov
- Institute of Cytology and Genetics, Siberian Branch of the Russian Academy of Sciences, 10 Lavrentieva Ave., Novosibirsk, 630090, Russia.,Novosibirsk State University, 2 Pirogova Street, Novosibirsk, 630090, Russia
| | - Sergey I Bayborodin
- Institute of Cytology and Genetics, Siberian Branch of the Russian Academy of Sciences, 10 Lavrentieva Ave., Novosibirsk, 630090, Russia
| | - Valeriy P Nikolin
- Institute of Cytology and Genetics, Siberian Branch of the Russian Academy of Sciences, 10 Lavrentieva Ave., Novosibirsk, 630090, Russia
| | - Nelly A Popova
- Institute of Cytology and Genetics, Siberian Branch of the Russian Academy of Sciences, 10 Lavrentieva Ave., Novosibirsk, 630090, Russia.,Novosibirsk State University, 2 Pirogova Street, Novosibirsk, 630090, Russia
| | - Nikolay A Kolchanov
- Institute of Cytology and Genetics, Siberian Branch of the Russian Academy of Sciences, 10 Lavrentieva Ave., Novosibirsk, 630090, Russia
| | - Sergey S Bogachev
- Institute of Cytology and Genetics, Siberian Branch of the Russian Academy of Sciences, 10 Lavrentieva Ave., Novosibirsk, 630090, Russia
| |
Collapse
|
8
|
Dolgova EV, Efremov YR, Taranov OS, Potter EA, Nikolin VP, Popova NA, Omigov VV, Chernykh ER, Proskurina AS, Bogachev SS. Comparative analysis of pathologic processes developing in mice housed in SPF vs non-SPF conditions and treated with cyclophosphamide and dsDNA preparation. Pathol Res Pract 2015; 211:754-8. [PMID: 26293796 DOI: 10.1016/j.prp.2015.07.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/03/2014] [Revised: 06/16/2015] [Accepted: 07/03/2015] [Indexed: 12/28/2022]
Abstract
In our earlier studies, we observed that when mice are treated with cyclophosphamide and fragmented exogenous dsDNA (18-30 h post cytostatic treatment), they develop a very characteristic set of symptoms and 80-90% of such animals succumb within 6-25 days. This was called "delayed death" phenomenon, and the gap between cyclophosphamide and DNA injections required for such phenotype to develop was termed "death window". We established that mice succumbed to multi-organ failure, which was caused by systemic inflammation and sepsis. These processes unfolded along with accidental involution of lymphoid organs, which resulted from the failure of CD34(+) hematopoietic stem cells to differentiate into lymphoid lineage progenitors. Here we compare SPF and non-SPF animals, and demonstrate that the major cause of systemic inflammation and sepsis observed upon such treatments is activation of an opportunistic infection. Mice of the same strain (CBA) housed under SPF conditions do not develop the characteristic symptoms, nor do they become moribund. Yet, regardless of the breeding conditions, upon synergistic action of cyclophosphamide and dsDNA, CD34(+) hematopoietic stem cells consistently fail to give rise to lymphoid lineage progenitors. We demonstrate that this differentiation defect is reversible and that population of lymphoid progenitors is restored by day 29 after cyclophosphamide injection.
Collapse
Affiliation(s)
- Evgeniya V Dolgova
- Institute of Cytology and Genetics, Siberian Branch, Russian Academy of Sciences, Novosibirsk 630090, Russia.
| | - Yaroslav R Efremov
- Institute of Cytology and Genetics, Siberian Branch, Russian Academy of Sciences, Novosibirsk 630090, Russia
| | - Oleg S Taranov
- The State Research Center of Virology and Biotechnology VECTOR, Koltsovo, Novosibirsk Region 630559, Russia
| | - Ekaterina A Potter
- Institute of Cytology and Genetics, Siberian Branch, Russian Academy of Sciences, Novosibirsk 630090, Russia
| | - Valeriy P Nikolin
- Institute of Cytology and Genetics, Siberian Branch, Russian Academy of Sciences, Novosibirsk 630090, Russia
| | - Nelly A Popova
- Institute of Cytology and Genetics, Siberian Branch, Russian Academy of Sciences, Novosibirsk 630090, Russia; Novosibirsk State University, Novosibirsk 630090, Russia
| | - Vladimir V Omigov
- The State Research Center of Virology and Biotechnology VECTOR, Koltsovo, Novosibirsk Region 630559, Russia
| | - Elena R Chernykh
- Institute of Clinical Immunology, Siberian Branch, Russian Academy of Medical Sciences, Novosibirsk 630099, Russia
| | - Anastasia S Proskurina
- Institute of Cytology and Genetics, Siberian Branch, Russian Academy of Sciences, Novosibirsk 630090, Russia
| | - Sergey S Bogachev
- Institute of Cytology and Genetics, Siberian Branch, Russian Academy of Sciences, Novosibirsk 630090, Russia
| |
Collapse
|
9
|
Alyamkina EA, Nikolin VP, Popova NA, Minkevich AM, Kozel AV, Dolgova EV, Efremov YR, Bayborodin SI, Andrushkevich OM, Taranov OS, Omigov VV, Rogachev VA, Proskurina AS, Vereschagin EI, Kiseleva EV, Zhukova MV, Ostanin AA, Chernykh ER, Bogachev SS, Shurdov MA. Combination of cyclophosphamide and double-stranded DNA demonstrates synergistic toxicity against established xenografts. Cancer Cell Int 2015; 15:32. [PMID: 25798073 PMCID: PMC4369063 DOI: 10.1186/s12935-015-0180-6] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2014] [Accepted: 02/24/2015] [Indexed: 12/22/2022] Open
Abstract
BACKGROUND Extracellular double-stranded DNA participates in various processes in an organism. Here we report the suppressive effects of fragmented human double-stranded DNA along or in combination with cyclophosphamide on solid and ascites grafts of mouse Krebs-2 tumor cells and DNA preparation on human breast adenocarcinoma cell line MCF-7. METHODS Apoptosis and necrosis were assayed by electrophoretic analysis (DNA nucleosomal fragmentation) and by measurements of LDH levels in ascitic fluid, respectively. DNA internalization into MCF-7 was analyzed by flow cytometry and fluorescence microscopy. RESULTS Direct cytotoxic activity of double-stranded DNA (along or in combination with cyclophosphamide) on a solid transplant was demonstrated. This resulted in delayed solid tumor proliferation and partial tumor lysis due to necrosis of the tumor and adjacent tissues. In the case of ascites form of tumor, extensive apoptosis and secondary necrosis were observed. Similarly, MCF-7 cells showed induction of massive apoptosis (up to 45%) as a result of treatments with double-stranded DNA preparation. CONCLUSIONS Double-stranded DNA (along or in combination with cyclophosphamide) induces massive apoptosis of Krebs-2 ascite cells and MCF-7 cell line (DNA only). In treated mice it reduces the integrity of gut wall cells and contributes to the development of systemic inflammatory reaction.
Collapse
Affiliation(s)
- Ekaterina A Alyamkina
- />Institute of Cytology and Genetics, Siberian Branch of the Russian Academy of Sciences, 10 Lavrentieva ave, 630090 Novosibirsk, Russia
| | - Valeriy P Nikolin
- />Institute of Cytology and Genetics, Siberian Branch of the Russian Academy of Sciences, 10 Lavrentieva ave, 630090 Novosibirsk, Russia
| | - Nelly A Popova
- />Institute of Cytology and Genetics, Siberian Branch of the Russian Academy of Sciences, 10 Lavrentieva ave, 630090 Novosibirsk, Russia
- />Novosibirsk State University, Novosibirsk, 630090 Russia
| | - Alexandra M Minkevich
- />Institute of Cytology and Genetics, Siberian Branch of the Russian Academy of Sciences, 10 Lavrentieva ave, 630090 Novosibirsk, Russia
| | - Artem V Kozel
- />Novosibirsk State University, Novosibirsk, 630090 Russia
| | - Evgenia V Dolgova
- />Institute of Cytology and Genetics, Siberian Branch of the Russian Academy of Sciences, 10 Lavrentieva ave, 630090 Novosibirsk, Russia
| | - Yaroslav R Efremov
- />Institute of Cytology and Genetics, Siberian Branch of the Russian Academy of Sciences, 10 Lavrentieva ave, 630090 Novosibirsk, Russia
- />Novosibirsk State University, Novosibirsk, 630090 Russia
| | - Sergey I Bayborodin
- />Institute of Cytology and Genetics, Siberian Branch of the Russian Academy of Sciences, 10 Lavrentieva ave, 630090 Novosibirsk, Russia
- />Novosibirsk State University, Novosibirsk, 630090 Russia
| | - Oleg M Andrushkevich
- />Institute of Cytology and Genetics, Siberian Branch of the Russian Academy of Sciences, 10 Lavrentieva ave, 630090 Novosibirsk, Russia
- />Novosibirsk State University, Novosibirsk, 630090 Russia
| | - Oleg S Taranov
- />The State Research Center of Virology and Biotechnology VECTOR, Koltsovo, Novosibirsk region 630559 Russia
| | - Vladimir V Omigov
- />The State Research Center of Virology and Biotechnology VECTOR, Koltsovo, Novosibirsk region 630559 Russia
| | - Vladimir A Rogachev
- />Institute of Cytology and Genetics, Siberian Branch of the Russian Academy of Sciences, 10 Lavrentieva ave, 630090 Novosibirsk, Russia
| | - Anastasia S Proskurina
- />Institute of Cytology and Genetics, Siberian Branch of the Russian Academy of Sciences, 10 Lavrentieva ave, 630090 Novosibirsk, Russia
| | | | - Elena V Kiseleva
- />Institute of Cytology and Genetics, Siberian Branch of the Russian Academy of Sciences, 10 Lavrentieva ave, 630090 Novosibirsk, Russia
| | - Maria V Zhukova
- />Institute of Cytology and Genetics, Siberian Branch of the Russian Academy of Sciences, 10 Lavrentieva ave, 630090 Novosibirsk, Russia
| | - Alexandr A Ostanin
- />Institute of Clinical Immunology, Siberian Branch of the Russian Academy of Medical Sciences, Novosibirsk, 630099 Russia
| | - Elena R Chernykh
- />Institute of Clinical Immunology, Siberian Branch of the Russian Academy of Medical Sciences, Novosibirsk, 630099 Russia
| | - Sergey S Bogachev
- />Institute of Cytology and Genetics, Siberian Branch of the Russian Academy of Sciences, 10 Lavrentieva ave, 630090 Novosibirsk, Russia
| | | |
Collapse
|
10
|
Proskurina AS, Gvozdeva TS, Alyamkina EA, Dolgova EV, Orishchenko KE, Nikolin VP, Popova NA, Sidorov SV, Chernykh ER, Ostanin AA, Leplina OY, Dvornichenko VV, Ponomarenko DM, Soldatova GS, Varaksin NA, Ryabicheva TG, Uchakin PN, Zagrebelniy SN, Rogachev VA, Bogachev SS, Shurdov MA. Results of multicenter double-blind placebo-controlled phase II clinical trial of Panagen preparation to evaluate its leukostimulatory activity and formation of the adaptive immune response in patients with stage II-IV breast cancer. BMC Cancer 2015; 15:122. [PMID: 25886605 PMCID: PMC4365563 DOI: 10.1186/s12885-015-1142-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2014] [Accepted: 02/27/2015] [Indexed: 12/20/2022] Open
Abstract
Background We performed a multicenter, double-blind, placebo-controlled, phase II clinical trial of human dsDNA-based preparation Panagen in a tablet form. In total, 80 female patients with stage II-IV breast cancer were recruited. Methods Patients received three consecutive FAC (5-fluorouracil, doxorubicin and cyclophosphamide) or AC (doxorubicin and cyclophosphamide) adjuvant chemotherapies (3 weeks per course) and 6 tablets of 5 mg Panagen or placebo daily (one tablet every 2–3 hours, 30 mg/day) for 18 days during each chemotherapy course. Statistical analysis was performed using Statistica 6.0 software, and non-parametric analyses, namely Wilcoxon-Mann–Whitney and paired Wilcoxon tests. To describe the results, the following parameters were used: number of observations (n), median, interquartile range, and minimum-maximum range. Results Panagen displayed pronounced leukostimulatory and leukoprotective effects when combined with chemotherapy. In an ancillary protocol, anticancer effects of a tablet form of Panagen were analyzed. We show that Panagen helps maintain the pre-therapeutic activity level of innate antitumor immunity and induces formation of a peripheral pool of cytotoxic CD8+ perforin + T-cells. Our 3-year follow-up analysis demonstrates that 24% of patients who received Panagen relapsed or died after the therapy, as compared to 45% in the placebo cohort. Conclusions The data collected in this trial set Panagen as a multi-faceted “all-in-one” medicine that is capable of simultaneously sustaining hematopoiesis, sparing the innate immune cells from adverse effects of three consecutive rounds of chemotherapy and boosting individual adaptive immunity. Its unique feature is that it is delivered via gastrointestinal tract and acts through the lymphoid system of intestinal mucosa. Taken together, maintenance of the initial levels of innate immunity, development of adaptive cytotoxic immune response and significantly reduced incidence of relapses 3 years after the therapy argue for the anticancer activity of Panagen. Trial registration ClinicalTrials.gov NCT02115984 from 04/07/2014. Electronic supplementary material The online version of this article (doi:10.1186/s12885-015-1142-z) contains supplementary material, which is available to authorized users.
Collapse
Affiliation(s)
- Anastasia S Proskurina
- Institute of Cytology and Genetics, Siberian Branch of the Russian Academy of Sciences, 10 Lavrentieva ave, Novosibirsk, 630090, Russia.
| | | | - Ekaterina A Alyamkina
- Institute of Cytology and Genetics, Siberian Branch of the Russian Academy of Sciences, 10 Lavrentieva ave, Novosibirsk, 630090, Russia.
| | - Evgenia V Dolgova
- Institute of Cytology and Genetics, Siberian Branch of the Russian Academy of Sciences, 10 Lavrentieva ave, Novosibirsk, 630090, Russia.
| | - Konstantin E Orishchenko
- Institute of Cytology and Genetics, Siberian Branch of the Russian Academy of Sciences, 10 Lavrentieva ave, Novosibirsk, 630090, Russia.
| | - Valeriy P Nikolin
- Institute of Cytology and Genetics, Siberian Branch of the Russian Academy of Sciences, 10 Lavrentieva ave, Novosibirsk, 630090, Russia.
| | - Nelly A Popova
- Institute of Cytology and Genetics, Siberian Branch of the Russian Academy of Sciences, 10 Lavrentieva ave, Novosibirsk, 630090, Russia. .,Novosibirsk State University, Novosibirsk, 630090, Russia.
| | - Sergey V Sidorov
- Novosibirsk State University, Novosibirsk, 630090, Russia. .,Oncology Department of Municipal Hospital No 1, Novosibirsk, 630047, Russia.
| | - Elena R Chernykh
- Institute of Clinical Immunology, Siberian Branch of the Russian Academy of Medical Sciences, Novosibirsk, 630099, Russia.
| | - Alexandr A Ostanin
- Institute of Clinical Immunology, Siberian Branch of the Russian Academy of Medical Sciences, Novosibirsk, 630099, Russia.
| | - Olga Y Leplina
- Institute of Clinical Immunology, Siberian Branch of the Russian Academy of Medical Sciences, Novosibirsk, 630099, Russia.
| | - Victoria V Dvornichenko
- Irkutsk State Medical Academy of Postgraduate Education, Irkutsk, 664049, Russia. .,Regional Oncology Dispensary, Irkutsk, 664035, Russia.
| | - Dmitriy M Ponomarenko
- Irkutsk State Medical Academy of Postgraduate Education, Irkutsk, 664049, Russia. .,Regional Oncology Dispensary, Irkutsk, 664035, Russia.
| | - Galina S Soldatova
- Novosibirsk State University, Novosibirsk, 630090, Russia. .,Clinic Department of the Central Clinical Hospital, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, 630090, Russia.
| | | | | | | | | | - Vladimir A Rogachev
- Institute of Cytology and Genetics, Siberian Branch of the Russian Academy of Sciences, 10 Lavrentieva ave, Novosibirsk, 630090, Russia.
| | - Sergey S Bogachev
- Institute of Cytology and Genetics, Siberian Branch of the Russian Academy of Sciences, 10 Lavrentieva ave, Novosibirsk, 630090, Russia.
| | | |
Collapse
|
11
|
Alyamkina EA, Leplina OY, Ostanin AA, Chernykh ER, Nikolin VP, Popova NA, Proskurina AS, Gvozdeva TS, Dolgova EV, Orishchenko KE, Rogachev VA, Sidorov SV, Varaksin NA, Ryabicheva TG, Bogachev SS, Shurdov MA. Effects of human exogenous DNA on production of perforin-containing CD8+ cytotoxic lymphocytes in laboratory setting and clinical practice. Cell Immunol 2012; 276:59-66. [PMID: 22578800 DOI: 10.1016/j.cellimm.2012.04.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2012] [Revised: 03/14/2012] [Accepted: 04/02/2012] [Indexed: 12/24/2022]
Abstract
We investigated the influence of Panagen DNA preparations on laboratory animals and IFN-induced human dendritic cells, as well as analyzed the data from a phase II clinical trial in the therapy of breast cancer. It was shown that this treatment resulted in increased number of CD8+/perforin+ T cells in peripheral lymphoid organs of experimental animals, in mixed lymphocyte culture population and in peripheral blood of breast cancer patients. Moreover, we demonstrated that when Panagen DNA preparations are used in combination with the standard FAC-based breast cancer therapies, non-specific immune response activity remains at the same levels as observed prior to therapy, whereas in FAC-placebo patients, non-specific immunity is greatly diminished.
Collapse
Affiliation(s)
- Ekaterina A Alyamkina
- Institute of Cytology and Genetics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
12
|
“Delayed death” phenomenon: A synergistic action of cyclophosphamide and exogenous DNA. Gene 2012; 495:134-45. [DOI: 10.1016/j.gene.2011.12.032] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2011] [Revised: 12/05/2011] [Accepted: 12/15/2011] [Indexed: 01/20/2023]
|
13
|
Alyamkina EA, Nikolin VP, Popova NA, Dolgova EV, Proskurina AS, Orishchenko KE, Efremov YR, Chernykh ER, Ostanin AA, Sidorov SV, Ponomarenko DM, Zagrebelniy SN, Bogachev SS, Shurdov MA. A strategy of tumor treatment in mice with doxorubicin-cyclophosphamide combination based on dendritic cell activation by human double-stranded DNA preparation. GENETIC VACCINES AND THERAPY 2010; 8:7. [PMID: 21040569 PMCID: PMC2987767 DOI: 10.1186/1479-0556-8-7] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/13/2010] [Accepted: 11/01/2010] [Indexed: 11/15/2022]
Abstract
BACKGROUND Immunization of mice with tumor homogenate after combined treatment with cyclophosphamide (CP) and double-stranded DNA (dsDNA) preparation is effective at inhibition of growth of tumor challenged after the treatment. It was assumed that this inhibition might be due to activation of the antigen-presenting cells. The purpose was to develop improved antitumor strategy using mice. We studied the combined action of cytostatics doxorubicin (Dox) plus CP with subsequent dsDNA preparation on tumor growth. METHODS Three-month old CBA/Lac mice were used in the experiments. Mice were injected with CP and human dsDNA preparation. The percentage of mature dendritic cells (DCs) was estimated by staining of mononuclear cells isolated from spleen and bone marrow 3, 6, and 9 days later with monoclonal antibodies CD34, CD80, and CD86. In the next set of experiments, mice were given intramuscularly injections of 1-3 × 105 tumor cells. Four days later, they were injected intravenously with 6-6.7 mg/kg Dox and intraperitoneally with 100-200 mg/kg CP; 200 mkg human DNA was injected intraperitoneally after CP administration. Differences in tumor size between groups were analyzed for statistical significance by Student's t-test. The MTT-test was done to determine the cytotoxic index of mouse leucocytes from treated groups. RESULTS The conducted experiments showed that combined treatment with CP and dsDNA preparation produce an increase in the total amount of mature DCs in vivo. Treatment of tumor bearers with preparation of fragmented dsDNA on the background of pretreatment with Dox plus CP demonstrated a strong suppression of tumor growth in two models. RLS, a weakly immunogenic, resistant to alkalyting cytostatics tumor, grew 3.4-fold slower when compared with the control (p < 0.001). In experiment with Krebs-2 tumor, only 2 of the 10 mice in the Dox+CP+DNA group had a palpable tumor on day 16. The cytotoxic index of leucocytes was 86.5% in the Dox+CP+DNA group, but it was 0% in the Dox+CP group. CONCLUSIONS Thus, the set of experiments we performed showed that exogenous dsDNA, when administered on the background of pretreatment with Dox plus CP, has an antitumor effect possibly due to DC activation.
Collapse
Affiliation(s)
- Ekaterina A Alyamkina
- Novosibirsk State University, Novosibirsk, Russia
- Institute of Cytology and Genetics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
| | - Valeriy P Nikolin
- Institute of Cytology and Genetics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
| | - Nelly A Popova
- Novosibirsk State University, Novosibirsk, Russia
- Institute of Cytology and Genetics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
| | - Evgenia V Dolgova
- Novosibirsk State University, Novosibirsk, Russia
- Institute of Cytology and Genetics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
| | - Anastasia S Proskurina
- Institute of Cytology and Genetics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
| | - Konstantin E Orishchenko
- Institute of Cytology and Genetics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
| | - Yaroslav R Efremov
- Institute of Cytology and Genetics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
| | - Elena R Chernykh
- Institute of Clinical Immunology, Siberian Branch, Russian Academy of Medical Sciences, Novosibirsk, Russia
| | - Alexandr A Ostanin
- Institute of Clinical Immunology, Siberian Branch, Russian Academy of Medical Sciences, Novosibirsk, Russia
| | | | | | | | - Sergey S Bogachev
- Institute of Cytology and Genetics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
| | | |
Collapse
|
14
|
Alyamkina EA, Leplina OY, Sakhno LV, Chernykh ER, Ostanin AA, Efremov YR, Shilov AG, Proskurina AS, Orishchenko KE, Dolgova EV, Rogachev VA, Nikolin VP, Popova NA, Zagrebelniy SN, Bogachev SS, Shurdov MA. Effect of double-stranded DNA on maturation of dendritic cells in vitro. Cell Immunol 2010; 266:46-51. [PMID: 20863487 DOI: 10.1016/j.cellimm.2010.08.011] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2010] [Revised: 08/25/2010] [Accepted: 08/27/2010] [Indexed: 11/30/2022]
Abstract
A preparation of human genomic fragmented double-stranded DNA (dsDNA) was used as maturation stimulus in cultures of human dendritic cells (DCs) generated in compliance with the interferon protocol. Culturing of the DCs in medium with 5μg/ml of the DNA preparation was associated with a decrease in the relative proportion of CD14 + cells and an increase in that of CD83 + cells. These changes are markers of DC maturation. The efficiency with which the DNA preparation was able to elicit DC maturation was commensurate with that of lypopolysaccharide from bacterial cell, the standard inducer of DC maturation. Generated ex vivo, matured in the presence of the human DNA preparation, pulsed with tumor antigens mouse DCs were used as a vaccine in biological tests for its antitumor activity. The experimental results demonstrate that reinfusion of mature pulsed with tumor antigens DCs cause a statistically significant suppression of tumor graft growth.
Collapse
|