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Lesnova EI, Masalova OV, Permyakova KY, Demidova NA, Valuev-Elliston VT, Ivanov AV, Kushch AA. The adjuvant effect of polymuramil, a NOD1 and NOD2 agonist, differs when immunizing mice of different inbred lines with nonstructural hepatitis C virus (Flaviviridae: Hepacivirus)proteins and is synergistically enhanced in combination with pyrogenalum, a TLR4 agonist. Vopr Virusol 2023; 68:315-326. [PMID: 38156588 DOI: 10.36233/0507-4088-183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2023] [Indexed: 12/30/2023]
Abstract
INTRODUCTION Hepatitis C is a liver disease with high chronicity, the cause of cirrhosis and hepatocarcinoma. The main obstacle to controlling hepatitis C is the lack of vaccines. The aim of the work was to compare the immunogenic activity of nonstructural recombinant proteins NS3, NS4 and NS5B of hepatitis C virus (HCV) as components of a subunit candidate vaccine and to analyze the adjuvant properties of two available commercial drugs, polymuramil and pyrogenalum. MATERIALS AND METHODS BALB/c, DBA/2J and C57BL/6 mice were immunized with nonstructural proteins without adjuvants or with polymuramyl (NOD1 and NOD2 agonist) and pyrogenalum (TLR-4 agonist). The activity of antibodies was determined in ELISA, the cellular response - by antigen-specific lymphocyte proliferation and by production of IFN-γ in vitro. RESULTS Recombinant proteins showed different immunogenicity. NS4 induced antibodies more efficiently than NS3 and NS5B. Significant differences were found in the immune response of three inbred lines mice: the level of IFN-γ in BALB/c and DBA/2J mice induced by NS5B protein was 30 times higher than in C57Bl/6 mice. In contrast, the induction of antibodies in BALB/c mice was lower than in C57Bl/6 and DBA/2J. Polymuramil did not increase the humoral response to NS5B and enhanced the cellular response only in C57BL/6 mice. The combined use of polymuramil with pyrogenalum significantly increased both the humoral and cellular response of mice to all recombinant HCV proteins. CONCLUSION Different immunogenic properties and different functions of recombinant non-structural HCV proteins indicate the feasibility of their combined inclusion in subunit vaccines. It was established for the first time that immunization with HCV proteins with a complex adjuvant (polymuramyl + pyrogenalum) has a synergistic effect, significantly exceeding the effect of each of them separately.
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Affiliation(s)
- E I Lesnova
- Gamaleya NRC of Epidemiology and Microbiology, Ministry of Health of the Russian Federation
| | - O V Masalova
- Gamaleya NRC of Epidemiology and Microbiology, Ministry of Health of the Russian Federation
| | - K Y Permyakova
- Gamaleya NRC of Epidemiology and Microbiology, Ministry of Health of the Russian Federation
- Moscow State Academy of Veterinary Medicine and Biotechnology - MVA by K.I. Skryabin
| | - N A Demidova
- Gamaleya NRC of Epidemiology and Microbiology, Ministry of Health of the Russian Federation
| | | | - A V Ivanov
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences
| | - A A Kushch
- Gamaleya NRC of Epidemiology and Microbiology, Ministry of Health of the Russian Federation
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Masalova OV, Lesnova EI, Kalsin VA, Klimova RR, Fedorova NE, Kozlov VV, Demidova NA, Yurlov KI, Konoplyannikov MA, Nikolaeva TN, Pronin AV, Baklaushev VP, Kushch AA. Human Mesenchymal Stem Cells Modified with the NS5A Gene of Hepatitis C Virus Induce a Cellular Immune Response Exceeding the Response to DNA Immunization with This Gene. Biology (Basel) 2023; 12:792. [PMID: 37372076 DOI: 10.3390/biology12060792] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2023] [Revised: 05/22/2023] [Accepted: 05/27/2023] [Indexed: 06/29/2023]
Abstract
Hepatitis C virus (HCV) is one of the basic culprits behind chronic liver disease, which may result in cirrhosis and hepatocarcinoma. In spite of the extensive research conducted, a vaccine against HCV has not been yet created. We have obtained human mesenchymal stem cells (hMSCs) and used them for expressing the HCV NS5A protein as a model vaccination platform. Sixteen hMSC lines of a different origin were transfected with the pcNS5A-GFP plasmid to obtain genetically modified MSCs (mMSCs). The highest efficiency was obtained by the transfection of dental pulp MSCs. C57BL/6 mice were immunized intravenously with mMSCs, and the immune response was compared with the response to the pcNS5A-GFP plasmid, which was injected intramuscularly. It was shown that the antigen-specific lymphocyte proliferation and the number of IFN-γ-synthesizing cells were two to three times higher after the mMSC immunization compared to the DNA immunization. In addition, mMSCs induced more CD4+ memory T cells and an increase in the CD4+/CD8+ ratio. The results suggest that the immunostimulatory effect of mMSCs is associated with the switch of MSCs to the pro-inflammatory phenotype and a decrease in the proportion of myeloid derived suppressor cells. Thus, the possibility of using human mMSCs for the creation of a vaccine against HCV has been shown for the first time.
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Affiliation(s)
- Olga V Masalova
- Gamaleya National Research Center for Epidemiology and Microbiology, Ministry of Health of the Russian Federation, 123098 Moscow, Russia
| | - Ekaterina I Lesnova
- Gamaleya National Research Center for Epidemiology and Microbiology, Ministry of Health of the Russian Federation, 123098 Moscow, Russia
| | - Vladimir A Kalsin
- Federal Research Clinical Center of Specialized Medical Care and Medical Technologies, Federal Medical-Biological Agency of the Russian Federation, 115682 Moscow, Russia
| | - Regina R Klimova
- Gamaleya National Research Center for Epidemiology and Microbiology, Ministry of Health of the Russian Federation, 123098 Moscow, Russia
| | - Natalya E Fedorova
- Gamaleya National Research Center for Epidemiology and Microbiology, Ministry of Health of the Russian Federation, 123098 Moscow, Russia
| | - Vyacheslav V Kozlov
- Gamaleya National Research Center for Epidemiology and Microbiology, Ministry of Health of the Russian Federation, 123098 Moscow, Russia
| | - Natalya A Demidova
- Gamaleya National Research Center for Epidemiology and Microbiology, Ministry of Health of the Russian Federation, 123098 Moscow, Russia
| | - Kirill I Yurlov
- Gamaleya National Research Center for Epidemiology and Microbiology, Ministry of Health of the Russian Federation, 123098 Moscow, Russia
| | - Mikhail A Konoplyannikov
- Federal Research Clinical Center of Specialized Medical Care and Medical Technologies, Federal Medical-Biological Agency of the Russian Federation, 115682 Moscow, Russia
- Institute for Regenerative Medicine, Sechenov First Moscow State Medical University, 119435 Moscow, Russia
| | - Tatyana N Nikolaeva
- Gamaleya National Research Center for Epidemiology and Microbiology, Ministry of Health of the Russian Federation, 123098 Moscow, Russia
| | - Alexander V Pronin
- Gamaleya National Research Center for Epidemiology and Microbiology, Ministry of Health of the Russian Federation, 123098 Moscow, Russia
| | - Vladimir P Baklaushev
- Federal Research Clinical Center of Specialized Medical Care and Medical Technologies, Federal Medical-Biological Agency of the Russian Federation, 115682 Moscow, Russia
| | - Alla A Kushch
- Gamaleya National Research Center for Epidemiology and Microbiology, Ministry of Health of the Russian Federation, 123098 Moscow, Russia
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Masalova OV, Lesnova EI, Andreev SM, Shershakova NN, Kozlov VV, Permyakova KY, Demidova NA, Valuev-Elliston VT, Turetskiy EA, Ivanov AV, Nikolaeva TN, Khaitov MR, Pronin AV, Kushch AA. [Adjuvant effect of dispersed fullerene C60 on the immune response to constructs harboring amino acid and nucleotide sequences of hepatitis C virus nonstructural NS5B protein]. Vopr Virusol 2023; 67:516-526. [PMID: 37264841 DOI: 10.36233/0507-4088-149] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2022] [Indexed: 06/03/2023]
Abstract
INTRODUCTION A vaccine against hepatitis C has not yet been developed. Recombinant proteins and plasmids encoding hepatitis C virus (HCV) proteins, the components of candidate vaccines, induce a weak immune response and require the use of adjuvants. The aim of the work was to study the adjuvant action of an aqueous solution of fullerene C60 during immunization of mice with HCV recombinant protein NS5B (rNS5B) that is an RNA-dependent RNA polymerase, or with NS5B-encoding pcNS5B plasmid. MATERIALS AND METHODS An aqueous solution of dispersed fullerene (dnC60) was obtained by ultrafiltration. C57BL/6 mice were immunized with rNS5B subcutaneously, pcNS5B intramuscularly mixed with different doses of dnC60 three times, then the humoral and cellular response to HCV was evaluated. RESULTS Mice immunization with rNS5B in a mixture with dnC60 at doses of 250 g/mouse significantly induced humoral response: a dose-dependent increase in IgG1 antibody titers was 720 times higher than in the absence of fullerene. There was no increase in the cellular response to rNS5B when administered with dnC60. The humoral response to DNA immunization was weak in mice of all groups receiving pcNS5B. The cellular response was suppressed when the plasmid was injected in a mixture with dnC60. CONCLUSIONS Dispersed fullerene dnC60 is a promising adjuvant for increasing the immunostimulating activity of weakly immunogenic proteins including surface and other HCV proteins, important for a protective response. Further research is needed to enhance the ability of dnC60 to boost the cellular immune response to the components of the candidate vaccine.
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Affiliation(s)
- O V Masalova
- Gamaleya NRC of Epidemiology and Microbiology, Ministry of Health of the Russian Federation
| | - E I Lesnova
- Gamaleya NRC of Epidemiology and Microbiology, Ministry of Health of the Russian Federation
| | | | | | - V V Kozlov
- Gamaleya NRC of Epidemiology and Microbiology, Ministry of Health of the Russian Federation
| | - K Y Permyakova
- Gamaleya NRC of Epidemiology and Microbiology, Ministry of Health of the Russian Federation
- Federal State Budgetary Educational Institution of Higher Education «Moscow State Academy of Veterinary Medicine and Biotechnology - MVA by K.I. Skryabin»
| | - N A Demidova
- Gamaleya NRC of Epidemiology and Microbiology, Ministry of Health of the Russian Federation
| | | | - E A Turetskiy
- NRC Institute of Immunology FMBA of Russia
- Sechenov First Moscow State Medical University (Sechenov University)
| | - A V Ivanov
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences
| | - T N Nikolaeva
- Gamaleya NRC of Epidemiology and Microbiology, Ministry of Health of the Russian Federation
| | - M R Khaitov
- NRC Institute of Immunology FMBA of Russia
- Pirogov Russian National Research Medical University
| | - A V Pronin
- Gamaleya NRC of Epidemiology and Microbiology, Ministry of Health of the Russian Federation
| | - A A Kushch
- Gamaleya NRC of Epidemiology and Microbiology, Ministry of Health of the Russian Federation
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Masalova OV, Lesnova EI, Klimova RR, Ivanov AV, Kushch AA. Mesenchymal Stem Cells Can Both Enhance and Inhibit the Cellular Response to DNA Immunization by Genes of Nonstructural Proteins of the Hepatitis C Virus. Int J Mol Sci 2021; 22:8121. [PMID: 34360889 PMCID: PMC8347804 DOI: 10.3390/ijms22158121&set/a 880446214+990577611] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/16/2023] Open
Abstract
Despite extensive research, there is still no vaccine against the hepatitis C virus (HCV). The aim of this study was to investigate whether MSCs can exhibit adjuvant properties during DNA vaccination against hepatitis C. We used the pcNS3-NS5B plasmid encoding five nonstructural HCV proteins and MSCs derived from mice bone marrow. Five groups of DBA mice were immunized with the plasmid and/or MSCs in a different order. Group 1 was injected with the plasmid twice at intervals of 3 weeks; Group 2 with the plasmid, and after 24 h with MSCs; Group 3 with MSCs followed by the plasmid the next day; Group 4 with only MSCs; and Group 5 with saline. When the MSCs were injected prior to DNA immunization, the cell immune response to HCV proteins assessed by the level of IFN-γ synthesis was markedly increased compared to DNA alone. In contrast, MSCs injected after DNA suppressed the immune response. Apparently, the high level of proinflammatory cytokines detected after DNA injection promotes the conversion of MSCs introduced later into the immunosuppressive MSC2. The low level of cytokines in mice before MSC administration promotes the high immunostimulatory activity of MSC1 in response to a DNA vaccine. Thus, when administered before DNA, MSCs are capable of exhibiting promising adjuvant properties.
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Affiliation(s)
- Olga V. Masalova
- Gamaleya National Research Center of Epidemiology and Microbiology, Ministry of Health of the Russian Federation, 123098 Moscow, Russia; (E.I.L.); (R.R.K.); (A.A.K.)
- Correspondence: ; Tel.: +7-499-190-30-49
| | - Ekaterina I. Lesnova
- Gamaleya National Research Center of Epidemiology and Microbiology, Ministry of Health of the Russian Federation, 123098 Moscow, Russia; (E.I.L.); (R.R.K.); (A.A.K.)
| | - Regina R. Klimova
- Gamaleya National Research Center of Epidemiology and Microbiology, Ministry of Health of the Russian Federation, 123098 Moscow, Russia; (E.I.L.); (R.R.K.); (A.A.K.)
| | - Alexander V. Ivanov
- Center for Precision Genome Editing and Genetic Technologies for Biomedicine, Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, 119991 Moscow, Russia;
| | - Alla A. Kushch
- Gamaleya National Research Center of Epidemiology and Microbiology, Ministry of Health of the Russian Federation, 123098 Moscow, Russia; (E.I.L.); (R.R.K.); (A.A.K.)
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Masalova OV, Lesnova EI, Klimova RR, Ivanov AV, Kushch AA. Mesenchymal Stem Cells Can Both Enhance and Inhibit the Cellular Response to DNA Immunization by Genes of Nonstructural Proteins of the Hepatitis C Virus. Int J Mol Sci 2021; 22:8121. [PMID: 34360889 PMCID: PMC8347804 DOI: 10.3390/ijms22158121] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2021] [Revised: 07/26/2021] [Accepted: 07/28/2021] [Indexed: 12/21/2022] Open
Abstract
Despite extensive research, there is still no vaccine against the hepatitis C virus (HCV). The aim of this study was to investigate whether MSCs can exhibit adjuvant properties during DNA vaccination against hepatitis C. We used the pcNS3-NS5B plasmid encoding five nonstructural HCV proteins and MSCs derived from mice bone marrow. Five groups of DBA mice were immunized with the plasmid and/or MSCs in a different order. Group 1 was injected with the plasmid twice at intervals of 3 weeks; Group 2 with the plasmid, and after 24 h with MSCs; Group 3 with MSCs followed by the plasmid the next day; Group 4 with only MSCs; and Group 5 with saline. When the MSCs were injected prior to DNA immunization, the cell immune response to HCV proteins assessed by the level of IFN-γ synthesis was markedly increased compared to DNA alone. In contrast, MSCs injected after DNA suppressed the immune response. Apparently, the high level of proinflammatory cytokines detected after DNA injection promotes the conversion of MSCs introduced later into the immunosuppressive MSC2. The low level of cytokines in mice before MSC administration promotes the high immunostimulatory activity of MSC1 in response to a DNA vaccine. Thus, when administered before DNA, MSCs are capable of exhibiting promising adjuvant properties.
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Affiliation(s)
- Olga V. Masalova
- Gamaleya National Research Center of Epidemiology and Microbiology, Ministry of Health of the Russian Federation, 123098 Moscow, Russia; (E.I.L.); (R.R.K.); (A.A.K.)
| | - Ekaterina I. Lesnova
- Gamaleya National Research Center of Epidemiology and Microbiology, Ministry of Health of the Russian Federation, 123098 Moscow, Russia; (E.I.L.); (R.R.K.); (A.A.K.)
| | - Regina R. Klimova
- Gamaleya National Research Center of Epidemiology and Microbiology, Ministry of Health of the Russian Federation, 123098 Moscow, Russia; (E.I.L.); (R.R.K.); (A.A.K.)
| | - Alexander V. Ivanov
- Center for Precision Genome Editing and Genetic Technologies for Biomedicine, Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, 119991 Moscow, Russia;
| | - Alla A. Kushch
- Gamaleya National Research Center of Epidemiology and Microbiology, Ministry of Health of the Russian Federation, 123098 Moscow, Russia; (E.I.L.); (R.R.K.); (A.A.K.)
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Lesnova EI, Masalova OV, Permyakova KY, Kozlov VV, Nikolaeva TN, Pronin AV, Valuev-Elliston VT, Ivanov AV, Kushch AA. Difluoromethylornithine (DFMO), an Inhibitor of Polyamine Biosynthesis, and Antioxidant N-Acetylcysteine Potentiate Immune Response in Mice to the Recombinant Hepatitis C Virus NS5B Protein. Int J Mol Sci 2021; 22:ijms22136892. [PMID: 34206987 PMCID: PMC8268280 DOI: 10.3390/ijms22136892] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Revised: 06/05/2021] [Accepted: 06/22/2021] [Indexed: 02/08/2023] Open
Abstract
Hepatitis C virus (HCV) is one of the main triggers of chronic liver disease. Despite tremendous progress in the HCV field, there is still no vaccine against this virus. Potential vaccines can be based on its recombinant proteins. To increase the humoral and, especially, cellular immune response to them, more effective adjuvants are needed. Here, we evaluated a panel of compounds as potential adjuvants using the HCV NS5B protein as an immunogen. These compounds included inhibitors of polyamine biosynthesis and urea cycle, the mTOR pathway, antioxidants, and cellular receptors. A pronounced stimulation of cell proliferation and interferon-γ (IFN-γ) secretion in response to concanavalin A was shown for antioxidant N-acetylcysteine (NAC), polyamine biosynthesis inhibitor 2-difluoromethylornithine (DFMO), and TLR9 agonist CpG ODN 1826 (CpG). Their usage during the immunization of mice with the recombinant NS5B protein significantly increased antibody titers, enhanced lymphocyte proliferation and IFN-γ production. NAC and CpG decreased relative Treg numbers; CpG increased the number of myeloid-derived suppressor cells (MDSCs), whereas neither NAC nor DFMO affected MDSC counts. NAC and DFMO suppressed NO and interleukin 10 (IL-10) production by splenocytes, while DFMO increased the levels of IL-12. This is the first evidence of immunomodulatory activity of NAC and DFMO during prophylactic immunization against infectious diseases.
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Affiliation(s)
- Ekaterina I. Lesnova
- Gamaleya National Research Center of Epidemiology and Microbiology, Ministry of Health of the Russian Federation, 123098 Moscow, Russia; (E.I.L.); (K.Y.P.); (V.V.K.); (T.N.N.); (A.V.P.); (A.A.K.)
| | - Olga V. Masalova
- Gamaleya National Research Center of Epidemiology and Microbiology, Ministry of Health of the Russian Federation, 123098 Moscow, Russia; (E.I.L.); (K.Y.P.); (V.V.K.); (T.N.N.); (A.V.P.); (A.A.K.)
- Correspondence: (O.V.M.); (A.V.I.); Tel.: +7-499-190-30-49 (O.V.M.); +7-199-135-60-65 (A.V.I.)
| | - Kristina Yu. Permyakova
- Gamaleya National Research Center of Epidemiology and Microbiology, Ministry of Health of the Russian Federation, 123098 Moscow, Russia; (E.I.L.); (K.Y.P.); (V.V.K.); (T.N.N.); (A.V.P.); (A.A.K.)
- Federal State Budgetary Educational Institution of Higher Education “Moscow State Academy of Veterinary Medicine and Biotechnology—MVA by K.I. Skryabin”, 109472 Moscow, Russia
| | - Vyacheslav V. Kozlov
- Gamaleya National Research Center of Epidemiology and Microbiology, Ministry of Health of the Russian Federation, 123098 Moscow, Russia; (E.I.L.); (K.Y.P.); (V.V.K.); (T.N.N.); (A.V.P.); (A.A.K.)
| | - Tatyana N. Nikolaeva
- Gamaleya National Research Center of Epidemiology and Microbiology, Ministry of Health of the Russian Federation, 123098 Moscow, Russia; (E.I.L.); (K.Y.P.); (V.V.K.); (T.N.N.); (A.V.P.); (A.A.K.)
| | - Alexander V. Pronin
- Gamaleya National Research Center of Epidemiology and Microbiology, Ministry of Health of the Russian Federation, 123098 Moscow, Russia; (E.I.L.); (K.Y.P.); (V.V.K.); (T.N.N.); (A.V.P.); (A.A.K.)
| | - Vladimir T. Valuev-Elliston
- Center for Precision Genome Editing and Genetic Technologies for Biomedicine, Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, 119991 Moscow, Russia;
| | - Alexander V. Ivanov
- Center for Precision Genome Editing and Genetic Technologies for Biomedicine, Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, 119991 Moscow, Russia;
- Correspondence: (O.V.M.); (A.V.I.); Tel.: +7-499-190-30-49 (O.V.M.); +7-199-135-60-65 (A.V.I.)
| | - Alla A. Kushch
- Gamaleya National Research Center of Epidemiology and Microbiology, Ministry of Health of the Russian Federation, 123098 Moscow, Russia; (E.I.L.); (K.Y.P.); (V.V.K.); (T.N.N.); (A.V.P.); (A.A.K.)
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Klimova RR, Demidova NA, Masalova OV, Kushch AA. [Preventive Vaccination with Mesenchymal Stem Cells Protects Mice from Lethal Infection Caused by Herpes Simplex Virus 1]. Mol Biol (Mosk) 2021; 55:478-490. [PMID: 34097682 DOI: 10.31857/s0026898421030101] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2020] [Accepted: 09/10/2020] [Indexed: 11/24/2022]
Abstract
Herpes simplex viruses 1 and 2 (HSV-1 and HSV-2) infect almost all organs and tissues, cause genital herpes-the most common sexually transmitted disease-disorders of the central nervous system (CNS), and lead to severe complications in children. Despite the available drugs, the incidence of HSV-1/2 continues to rise. None of the prophylactic vaccine candidates have shown a protective effect in trials nor approval for use in clinical practice. We have investigated the protective properties of mesenchymal stem cells (MSC) isolated from the bone marrow of mice. A comparative analysis of the protective response to the introduction of primary and modified MSCs (mMSC) was carried out using the plasmid containing gene of the HSV and an inactivated virus in a model of lethal HSV-1 infection in mice. mMSCs were obtained by transfection of the Us6 gene encoding glycoprotein D (gD) of the HSV, the plasmid contained the same gene. After twofold immunization with primary MSCs, the formation of antibodies interacting with the viral antigen (according to enzyme immunoassay data) and neutralizing the infectious activity of HSV-1 in the reaction of biological neutralization was observed in the peripheral blood of mice. In addition, the introduction of primary MSCs induced the production of interferon gamma (INF-γ) which is detected in the peripheral blood of mice. After infection with HSV-1, the immunized mice showed significantly increased titers of virus-specific antibodies, an increased level of IFNγ, and were completely protected from lethal HSV-1 infection. The protective effect of the other three immunogens was lower and did not exceed 50-65%. Considering the wide availability of MSCs, the proven safety of intravenous administration, and the results obtained in this work on the ability to induce innate, adaptive and protective immunity to HSV-1, MSCs can be considered a promising basis for the development of new cellular vaccines for the prevention of herpesvirus and other viral infections.
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Affiliation(s)
- R R Klimova
- Gamaleya National Research Centre for Epidemiology and Microbiology, Moscow, 123098 Russia.,
| | - N A Demidova
- Gamaleya National Research Centre for Epidemiology and Microbiology, Moscow, 123098 Russia
| | - O V Masalova
- Gamaleya National Research Centre for Epidemiology and Microbiology, Moscow, 123098 Russia
| | - A A Kushch
- Gamaleya National Research Centre for Epidemiology and Microbiology, Moscow, 123098 Russia
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Kushch AA, Klimova RR, Fedorova NE, Masalova OV, Niconova AA, Lesnova EI, Momotyuk ED, Demidova NA, Samartseva TG, Zverev VV. [Development and properties of neutralizing monoclonal antibodies for fusion protein of respiratory syncytial virus.]. Vopr Virusol 2020; 64:90-96. [PMID: 31412175 DOI: 10.18821/0507-4088-2019-64-2-90-96] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2018] [Accepted: 10/31/2018] [Indexed: 11/17/2022]
Abstract
INTRODUCTION Respiratory syncytial virus (RSV) is the most common cause of lower respiratory tract infections in infants and the elderly. The absence of a wide range of therapeutic drugs and vaccines indicates to the high relevance of the development of new effective drugs for the prevention and treatment of RSV infections. PURPOSE to obtain highly active and specific monoclonal antibodies (MAbs) capable of detecting RSV in infected cells and neutralizing the infectious activity of the virus in vitro. MATERIAL AND METHODS RSV reference strains of group A 2 subgroups (A2 and Long) were propagated in HEp-2 and MA-104 cell lines, respectively. Mice were immunized with purified RSV A2 virus. MAbs were obtained using hybridoma technology. RESULTS A panel of 6 MAbs reacting with RSV strains А2 and Long has been obtained. Four MAbs were IgG (IgG2a or IgG2b subtype), two MAbs were IgM. All MAbs reacted with RSV F-protein in immunochemical tests. The MAbs actively reacted with RSV in ELISA, in immufluorescence and peroxidase staining of infected cells, and in immunodot test. Five out of 6 MAbs neutralized of RSV in cell culture. Different properties of MAbs suggest that they target different antigenic sites of F-protein. DISCUSSION Comparative analysis suggests that the obtained MAbs can be used for the development of diagnostic preparations, for RSV detection in clinical materials and confirmation of infection etiology by rapid culture method. CONCLUSION High activity and specificity of MAbs indicate that they can serve as a basis for development vaccines and preventive medicines.
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Affiliation(s)
- A A Kushch
- Ivanovsky Institute of Virology «National Research Centre for Epidemiology and Microbiology named honorary academician N.F. Gamaleya», Moscow, 123098, Russian Federation
| | - R R Klimova
- Ivanovsky Institute of Virology «National Research Centre for Epidemiology and Microbiology named honorary academician N.F. Gamaleya», Moscow, 123098, Russian Federation
| | - N E Fedorova
- Ivanovsky Institute of Virology «National Research Centre for Epidemiology and Microbiology named honorary academician N.F. Gamaleya», Moscow, 123098, Russian Federation
| | - O V Masalova
- Ivanovsky Institute of Virology «National Research Centre for Epidemiology and Microbiology named honorary academician N.F. Gamaleya», Moscow, 123098, Russian Federation
| | - A A Niconova
- Mechnikov Research Institute of Vaccines and Sera, Moscow, 105064, Russian Federation
| | - E I Lesnova
- Ivanovsky Institute of Virology «National Research Centre for Epidemiology and Microbiology named honorary academician N.F. Gamaleya», Moscow, 123098, Russian Federation
| | - E D Momotyuk
- Ivanovsky Institute of Virology «National Research Centre for Epidemiology and Microbiology named honorary academician N.F. Gamaleya», Moscow, 123098, Russian Federation
| | - N A Demidova
- Ivanovsky Institute of Virology «National Research Centre for Epidemiology and Microbiology named honorary academician N.F. Gamaleya», Moscow, 123098, Russian Federation
| | - T G Samartseva
- Mechnikov Research Institute of Vaccines and Sera, Moscow, 105064, Russian Federation
| | - V V Zverev
- Mechnikov Research Institute of Vaccines and Sera, Moscow, 105064, Russian Federation
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Masalova OV, Lesnova EI, Klimova RR, Momotyuk ED, Kozlov VV, Ivanova AM, Payushina OV, Butorina NN, Zakirova NF, Narovlyansky AN, Pronin AV, Ivanov AV, Kushch AA. Genetically Modified Mouse Mesenchymal Stem Cells Expressing Non-Structural Proteins of Hepatitis C Virus Induce Effective Immune Response. Vaccines (Basel) 2020; 8:E62. [PMID: 32024236 PMCID: PMC7158691 DOI: 10.3390/vaccines8010062] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2019] [Revised: 01/29/2020] [Accepted: 01/31/2020] [Indexed: 02/08/2023] Open
Abstract
Hepatitis C virus (HCV) is one of the major causes of chronic liver disease and leads to cirrhosis and hepatocarcinoma. Despite extensive research, there is still no vaccine against HCV. In order to induce an immune response in DBA/2J mice against HCV, we obtained modified mouse mesenchymal stem cells (mMSCs) simultaneously expressing five nonstructural HCV proteins (NS3-NS5B). The innate immune response to mMSCs was higher than to DNA immunization, with plasmid encoding the same proteins, and to naïve unmodified MSCs. mMSCs triggered strong phagocytic activity, enhanced lymphocyte proliferation, and production of type I and II interferons. The adaptive immune response to mMSCs was also more pronounced than in the case of DNA immunization, as exemplified by a fourfold stronger stimulation of lymphocyte proliferation in response to HCV, a 2.6-fold higher rate of biosynthesis, and a 30-fold higher rate of secretion of IFN-γ, as well as by a 40-fold stronger production of IgG2a antibodies to viral proteins. The immunostimulatory effect of mMSCs was associated with pronounced IL-6 secretion and reduction in the population of myeloid derived suppressor cells (MDSCs). Thus, this is the first example that suggests the feasibility of using mMSCs for the development of an effective anti-HCV vaccine.
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Affiliation(s)
- Olga V. Masalova
- Gamaleya National Research Center of Epidemiology and Microbiology, Ministry of Health of the Russian Federation, Moscow 123098, Russia; (E.I.L.); (R.R.K.); (E.D.M.); (V.V.K.); (A.M.I.); (A.N.N.); (A.V.P.); (A.A.K.)
| | - Ekaterina I. Lesnova
- Gamaleya National Research Center of Epidemiology and Microbiology, Ministry of Health of the Russian Federation, Moscow 123098, Russia; (E.I.L.); (R.R.K.); (E.D.M.); (V.V.K.); (A.M.I.); (A.N.N.); (A.V.P.); (A.A.K.)
| | - Regina R. Klimova
- Gamaleya National Research Center of Epidemiology and Microbiology, Ministry of Health of the Russian Federation, Moscow 123098, Russia; (E.I.L.); (R.R.K.); (E.D.M.); (V.V.K.); (A.M.I.); (A.N.N.); (A.V.P.); (A.A.K.)
| | - Ekaterina D. Momotyuk
- Gamaleya National Research Center of Epidemiology and Microbiology, Ministry of Health of the Russian Federation, Moscow 123098, Russia; (E.I.L.); (R.R.K.); (E.D.M.); (V.V.K.); (A.M.I.); (A.N.N.); (A.V.P.); (A.A.K.)
| | - Vyacheslav V. Kozlov
- Gamaleya National Research Center of Epidemiology and Microbiology, Ministry of Health of the Russian Federation, Moscow 123098, Russia; (E.I.L.); (R.R.K.); (E.D.M.); (V.V.K.); (A.M.I.); (A.N.N.); (A.V.P.); (A.A.K.)
| | - Alla M. Ivanova
- Gamaleya National Research Center of Epidemiology and Microbiology, Ministry of Health of the Russian Federation, Moscow 123098, Russia; (E.I.L.); (R.R.K.); (E.D.M.); (V.V.K.); (A.M.I.); (A.N.N.); (A.V.P.); (A.A.K.)
| | - Olga V. Payushina
- Federal State Autonomous Educational Institution of Higher Education I.M. Sechenov First Moscow State Medical University of the Ministry of Health of the Russian Federation (Sechenov University), Moscow 119991, Russia;
| | - Nina N. Butorina
- Koltzov Institute of Developmental Biology of Russian Academy of Sciences, Moscow 119334, Russia;
| | - Natalia F. Zakirova
- Center for Precision Genome Editing and Genetic Technologies for Biomedicine, Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow 119991, Russia;
| | - Alexander N. Narovlyansky
- Gamaleya National Research Center of Epidemiology and Microbiology, Ministry of Health of the Russian Federation, Moscow 123098, Russia; (E.I.L.); (R.R.K.); (E.D.M.); (V.V.K.); (A.M.I.); (A.N.N.); (A.V.P.); (A.A.K.)
| | - Alexander V. Pronin
- Gamaleya National Research Center of Epidemiology and Microbiology, Ministry of Health of the Russian Federation, Moscow 123098, Russia; (E.I.L.); (R.R.K.); (E.D.M.); (V.V.K.); (A.M.I.); (A.N.N.); (A.V.P.); (A.A.K.)
| | - Alexander V. Ivanov
- Center for Precision Genome Editing and Genetic Technologies for Biomedicine, Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow 119991, Russia;
| | - Alla A. Kushch
- Gamaleya National Research Center of Epidemiology and Microbiology, Ministry of Health of the Russian Federation, Moscow 123098, Russia; (E.I.L.); (R.R.K.); (E.D.M.); (V.V.K.); (A.M.I.); (A.N.N.); (A.V.P.); (A.A.K.)
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Timofeeva TA, Rudneva IA, Shilov AA, Balanova MA, Artemov EK, Kushch AA, Masalova OV, Klimova RR, Grebennikova TV, Каverin NV. [Change of phenotypic properties of escape mutants and readaptants of influenza virus A (H1N1)pdm09 under the influence of selected mutations in the molecule of hemagglutinin.]. Vopr Virusol 2019; 64:73-78. [PMID: 31412173 DOI: 10.18821/0507-4088-2019-64-2-73-78] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2018] [Accepted: 10/31/2018] [Indexed: 11/17/2022]
Abstract
INTRODUCTION After the emergence and spread of pandemic H1N1 viruses in 2009, antigenic epitopes recognized by neutralizing antibodies against the hemagglutinin of influenza A/Moscow/01/09(H1N1)pdm09 viruses were studied. PURPOSE The purpose of the study was to obtain readapted variants of the virus from a low-virulent escapemutant that has an increased affinity of the avian and the human types cellular receptors compared to the wild type and the comparative study of their antigenic and receptor specificity. MATERIAL AND METHODS Viruses were accumulated in 10-day-old chicken embryos. The MAB panel against HA of influenza virus strain A/IIV-Moscow/01/09(H1N1)sw1 was used in the form of ascites fluids from mice. Immunization of mice, HI testing, elution of viruses from chicken erythrocytes, PCR and sequencing of readapted variants were performed by standard methods. RESULTS The amino acid substitution A198E acquired in the process of readaptation leads to changes in the antigenic specificity. A correlation was found between a decrease in virulence of a low-virulent escape mutant associated with the substitution D190N in the hemagglutinin molecule and an increase in the hemagglutinating titer to inhibitors in normal mouse serum. Viruses with low affinity of cellular receptor analogs and carrying amino acid substitutions have an increased ability to elute from chicken erythrocytes. DISCUSSION The results discuss the effect of mutations in the HA molecule of the influenza A(H1N1) pdm09 virus to the change in antigen specificity; virulence for mice, adsorption-elution at cellular receptors. CONCLUSION A comparative study of the antigenic specificity and receptor-binding activity of the escape mutants was conducted for the hemagglutinin of the influenza virus A/Moscow/01/2009 (H1N1)swl, and the readapted variants obtained for one of the escape mutants with reduced virulence for mouse. Monitoring the pleiotropic effect of mutations in the hemagglutinin H1 molecule is necessary to predict variants of the virus with pandemic potential.
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Affiliation(s)
- T A Timofeeva
- Ivanovsky Institute of Virology «National Research Center for Epidemiology and Microbiology named after the honorary academician N.F. Gamaleya», Moscow, 123098, Russian Federation
| | - I A Rudneva
- Ivanovsky Institute of Virology «National Research Center for Epidemiology and Microbiology named after the honorary academician N.F. Gamaleya», Moscow, 123098, Russian Federation
| | - A A Shilov
- Ivanovsky Institute of Virology «National Research Center for Epidemiology and Microbiology named after the honorary academician N.F. Gamaleya», Moscow, 123098, Russian Federation
| | - M A Balanova
- Ivanovsky Institute of Virology «National Research Center for Epidemiology and Microbiology named after the honorary academician N.F. Gamaleya», Moscow, 123098, Russian Federation
| | - E K Artemov
- Ivanovsky Institute of Virology «National Research Center for Epidemiology and Microbiology named after the honorary academician N.F. Gamaleya», Moscow, 123098, Russian Federation
| | - A A Kushch
- Ivanovsky Institute of Virology «National Research Center for Epidemiology and Microbiology named after the honorary academician N.F. Gamaleya», Moscow, 123098, Russian Federation
| | - O V Masalova
- Ivanovsky Institute of Virology «National Research Center for Epidemiology and Microbiology named after the honorary academician N.F. Gamaleya», Moscow, 123098, Russian Federation
| | - R R Klimova
- Ivanovsky Institute of Virology «National Research Center for Epidemiology and Microbiology named after the honorary academician N.F. Gamaleya», Moscow, 123098, Russian Federation
| | - T V Grebennikova
- Ivanovsky Institute of Virology «National Research Center for Epidemiology and Microbiology named after the honorary academician N.F. Gamaleya», Moscow, 123098, Russian Federation.,Peoples Frendship University of Russia (RUDN), Moscow, 117198, Russian Federation
| | - N V Каverin
- Ivanovsky Institute of Virology «National Research Center for Epidemiology and Microbiology named after the honorary academician N.F. Gamaleya», Moscow, 123098, Russian Federation
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11
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Masalova OV, Lesnova EI, Onishchuk AA, Ivanova AM, Gerasimova EV, Ivanov AV, Narovlyansky AN, Sanin AV, Pronin AV, Kushch AA. Polyprenyl Phosphates Induce a High Humoral and Cellular Response to Immunization with Recombinant Proteins of the Replicative Complex of the Hepatitis C Virus. DOKL BIOCHEM BIOPHYS 2018; 482:261-263. [PMID: 30397888 DOI: 10.1134/s1607672918050083] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2018] [Indexed: 11/23/2022]
Abstract
The search for new adjuvants remains the critical task for the creation of hepatitis C vaccines due to the weak immunogenicity of biotechnological products. When immunizing mice with the recombinant proteins NS3 and NS5B of the hepatitis C virus (HCV), the adjuvant activity of three immunomodulators was compared. Phosprenyl® on the basis of polyprenyl phosphate (PPP), chemically synthesized analogue of the bacterial cell wall glucosaminyl muramyl dipeptide (GMDP), and IFN-α recombinant protein were tested. GMDP increased the activity of IgG1 antibodies 4-6 times but did not stimulate the production of IFN-γ; IFN-α has not shown any adjuvant properties. The introduction of recombinant HCV proteins together with PPP in low doses increased the activity of IgG2a isotype antibodies 4-7 times and increased IFN-γ secretion 3 times. Thus, it was first shown that PPP polarizes the immune response to Th1-type and is a promising adjuvant for the development of a vaccine against hepatitis C.
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Affiliation(s)
- O V Masalova
- Gamaleya National Research Centre of Epidemiology and Microbiology, Ministry of Health of the Russian Federation, Moscow, 123098, Russia.
| | - E I Lesnova
- Gamaleya National Research Centre of Epidemiology and Microbiology, Ministry of Health of the Russian Federation, Moscow, 123098, Russia
| | | | - A M Ivanova
- Gamaleya National Research Centre of Epidemiology and Microbiology, Ministry of Health of the Russian Federation, Moscow, 123098, Russia
| | - E V Gerasimova
- Gamaleya National Research Centre of Epidemiology and Microbiology, Ministry of Health of the Russian Federation, Moscow, 123098, Russia
| | - A V Ivanov
- Gamaleya National Research Centre of Epidemiology and Microbiology, Ministry of Health of the Russian Federation, Moscow, 123098, Russia
| | - A N Narovlyansky
- Gamaleya National Research Centre of Epidemiology and Microbiology, Ministry of Health of the Russian Federation, Moscow, 123098, Russia
| | - A V Sanin
- Gamaleya National Research Centre of Epidemiology and Microbiology, Ministry of Health of the Russian Federation, Moscow, 123098, Russia
| | - A V Pronin
- Gamaleya National Research Centre of Epidemiology and Microbiology, Ministry of Health of the Russian Federation, Moscow, 123098, Russia
| | - A A Kushch
- Gamaleya National Research Centre of Epidemiology and Microbiology, Ministry of Health of the Russian Federation, Moscow, 123098, Russia
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12
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Masalova OV, Lesnova EI, Solyev PN, Zakirova NF, Prassolov VS, Kochetkov SN, Ivanov AV, Kushch AA. Modulation of Cell Death Pathways by Hepatitis C Virus Proteins in Huh7.5 Hepatoma Cells. Int J Mol Sci 2017; 18:E2346. [PMID: 29113144 PMCID: PMC5713315 DOI: 10.3390/ijms18112346] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2017] [Revised: 10/27/2017] [Accepted: 11/03/2017] [Indexed: 12/20/2022] Open
Abstract
The hepatitis C virus (HCV) causes chronic liver disease leading to fibrosis, cirrhosis, and hepatocellular carcinoma. HCV infection triggers various types of cell death which contribute to hepatitis C pathogenesis. However, much is still unknown about the impact of viral proteins on them. Here we present the results of simultaneous immunocytochemical analysis of markers of apoptosis, autophagy, and necrosis in Huh7.5 cells expressing individual HCV proteins or their combinations, or harboring the virus replicon. Stable replication of the full-length HCV genome or transient expression of its core, Е1/Е2, NS3 and NS5B led to the death of 20-47% cells, 72 h posttransfection, whereas the expression of the NS4A/B, NS5A or NS3-NS5B polyprotein did not affect cell viability. HCV proteins caused different impacts on the activation of caspases-3, -8 and -9 and on DNA fragmentation. The structural core and E1/E2 proteins promoted apoptosis, whereas non-structural NS4A/B, NS5A, NS5B suppressed apoptosis by blocking various members of the caspase cascade. The majority of HCV proteins also enhanced autophagy, while NS5A also induced necrosis. As a result, the death of Huh7.5 cells expressing the HCV core was induced via apoptosis, the cells expressing NS3 and NS5B via autophagy-associated death, and the cells expressing E1/E2 glycoproteins or harboring HCV the replicon via both apoptosis and autophagy.
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Affiliation(s)
- Olga V Masalova
- Ivanovsky Institute of Virology, Gamaleya National Research Center of Epidemiology and Microbiology, Ministry of Health of the Russian Federation, Moscow 123098, Russia.
| | - Ekaterina I Lesnova
- Ivanovsky Institute of Virology, Gamaleya National Research Center of Epidemiology and Microbiology, Ministry of Health of the Russian Federation, Moscow 123098, Russia.
| | - Pavel N Solyev
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow 119991, Russia.
| | - Natalia F Zakirova
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow 119991, Russia.
| | - Vladimir S Prassolov
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow 119991, Russia.
| | - Sergey N Kochetkov
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow 119991, Russia.
| | - Alexander V Ivanov
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow 119991, Russia.
| | - Alla A Kushch
- Ivanovsky Institute of Virology, Gamaleya National Research Center of Epidemiology and Microbiology, Ministry of Health of the Russian Federation, Moscow 123098, Russia.
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13
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Masalova OV, Lesnova EI, Samokhvalov EI, Permyakova KY, Ivanov AV, Kochetkov SN, Kushch AA. [Low-molecular-weight regulators of biogenic polyamine metabolism affect cytokine production and expression of hepatitis С virus proteins in Huh7.5 human hepatocarcinoma cells]. Mol Biol (Mosk) 2017; 51:512-523. [PMID: 28707668 DOI: 10.7868/s0026898417030120] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2016] [Accepted: 06/29/2016] [Indexed: 11/23/2022]
Abstract
Hepatitis C virus (HCV) induces the expression of the genes of proinflammatory cytokines, the excessive production of which may cause cell death, and contribute to development of liver fibrosis and hepatocarcinoma. The relationship between cytokine production and metabolic disorders in HCV-infected cells remains obscure. The levels of biogenic polyamines, spermine, spermidine, and their precursor putrescine, may be a potential regulator of these processes. The purpose of the present work was to study the effects of the compounds which modulate biogenic polyamines metabolism on cytokine production and HCV proteins expression. Human hepatocarcinoma Huh7.5 cells have been transfected with the plasmids that encode HCV proteins and further incubated with the following low-molecular compounds that affect different stages of polyamine metabolism: (1) difluoromethylornithine (DFMO), the inhibitor of ornithine decarboxylase, the enzyme that catalyzes the biosynthesis of polyamines; (2) N,N'-bis(2,3-butane dienyl)-1,4-diaminobutane (MDL72.527), the inhibitor of proteins involved in polyamine degradation; and (3) synthetic polyamine analog N^(I),N^(II)-diethylnorspermine (DENSpm), an inducer of polyamine degradation enzyme. The intracellular accumulation and secretion of cytokines (IL-6, IL-1β, TNF-α, and TGF-β) was assessed by immunocytochemistry and in the immunoenzyme assay, while the cytokine gene expression was studied using reverse transcription and PCR. The effects of the compounds under analysis on the expression of HCV proteins were analyzed using the indirect immunofluorescence with anti-HCV monoclonal antibodies. It has been demonstrated that, in cells transfected with HCV genes, DFMO reduces the production of three out of four tested cytokines, namely, TNF-α and TGF-β in cells that express HCV core, Е1Е2, NS3, NS5A, and NS5B proteins, and IL-1β in the cells that express HCV core, Е1Е2, and NS3 proteins. MDL72527 and DENSpm decreased cytokine production to a lesser extent. Incubation with DFMO led to a 28-32% decrease in the number of cells expressing NS5B or NS5A, both of which are key components of the HCV replication complex. The results obtained in the work indicate that a further detailed study of the antiviral activity of DFMO is required in order to assess its potential as an anti-hepatitis C therapeutic agent.
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Affiliation(s)
- O V Masalova
- Ivanovsky Institute of Virology, Gamaleya Federal Research Center of Epidemiology and Microbiology, Ministry of Health of the Russian Federation, Moscow, 123098 Russia.,
| | - E I Lesnova
- Ivanovsky Institute of Virology, Gamaleya Federal Research Center of Epidemiology and Microbiology, Ministry of Health of the Russian Federation, Moscow, 123098 Russia
| | - E I Samokhvalov
- Ivanovsky Institute of Virology, Gamaleya Federal Research Center of Epidemiology and Microbiology, Ministry of Health of the Russian Federation, Moscow, 123098 Russia
| | - K Yu Permyakova
- Ivanovsky Institute of Virology, Gamaleya Federal Research Center of Epidemiology and Microbiology, Ministry of Health of the Russian Federation, Moscow, 123098 Russia
| | - A V Ivanov
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow, 119991 Russia
| | - S N Kochetkov
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow, 119991 Russia
| | - A A Kushch
- Ivanovsky Institute of Virology, Gamaleya Federal Research Center of Epidemiology and Microbiology, Ministry of Health of the Russian Federation, Moscow, 123098 Russia
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14
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Masalova OV, Lesnova EI, Permyakova KY, Samokhvalov EI, Ivanov AV, Kochetkov SN, Kushch AA. [Effect of Hepatitis C virus proteins on the production of proinflammatory and profibrotic cytokines in Huh7.5 human hepatoma cells]. Mol Biol (Mosk) 2017; 50:486-95. [PMID: 27414787 DOI: 10.7868/s0026898416020166] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2015] [Accepted: 11/03/2015] [Indexed: 12/12/2022]
Abstract
Hepatitis C virus (HCV) is a widespread dangerous human pathogen. Up to 80% of HCV-infected individuals develop chronic infection, which is often accompanied by liver inflammation and fibrosis and, at terminal stages, liver cirrhosis and cancer. Treatment of patients with end-stage liver disease is often ineffective, and even patients with suppressed HCV replication have higher risk of death as compared with noninfected subjects. Therefore, investigating the mechanisms that underlie HCV pathogenesis and developing treatments for virus-associated liver dysfunction remain an important goal. The effect of individual HCV proteins on the production of proinflammatory and profibrotic cytokines in hepatocellular carcinoma Huh7.5 cells was analyzed in a systematic manner. Cells were transfected with plasmids encoding HCV proteins. Cytokine production and secretion was accessed by immunocytochemistry and ELISA of the culture medium, and transcription of the cytokine genes was assessed using reverse transcription and PCR. HCV proteins proved to differ in effect on cytokine production. Downregulation of interleukin 6 (IL-6) production was observed in cells expressing the HCV core, NS3, and NS5A proteins. Production of transforming growth factor β1 (TGF-β1) was lower in cells expressing the core proteins, NS3, or E1/E2 glycoproteins. A pronounced increase in production and secretion of tumor necrosis factor α (TNF-α) was observed in response to expression of the HCV E1/E2 glycoproteins. A higher biosynthesis, but a lower level in the cell culture medium, was detected for interleukin 1β (IL-1β) in cells harboring NS4 and IL-6 in cells expressing NS5В. The finding was possibly explained by protein-specific retention and consequent accumulation of the respective cytokines in the cell.
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Affiliation(s)
- O V Masalova
- Ivanovsky Institute of Virology, Gamaleya Research Center of Epidemiology and Microbiology, Ministry of Health of the Russian Federation, Moscow, 123098, Russia.,
| | - E I Lesnova
- Ivanovsky Institute of Virology, Gamaleya Research Center of Epidemiology and Microbiology, Ministry of Health of the Russian Federation, Moscow, 123098, Russia
| | - K Yu Permyakova
- Ivanovsky Institute of Virology, Gamaleya Research Center of Epidemiology and Microbiology, Ministry of Health of the Russian Federation, Moscow, 123098, Russia
| | - E I Samokhvalov
- Ivanovsky Institute of Virology, Gamaleya Research Center of Epidemiology and Microbiology, Ministry of Health of the Russian Federation, Moscow, 123098, Russia
| | - A V Ivanov
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow, 119991, Russia
| | - S N Kochetkov
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow, 119991, Russia
| | - A A Kushch
- Ivanovsky Institute of Virology, Gamaleya Research Center of Epidemiology and Microbiology, Ministry of Health of the Russian Federation, Moscow, 123098, Russia
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15
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Ignatieva AV, Timofeeva TA, Rudneva IA, Shilov AA, Masalova OV, Klimova RR, Kushch AA, Ilyushina NA, Kaverin NV. [Effect of amino acid substitutions in small subunit of avian H5N2 influenza virus hemagglutinin on selection of the mutants resistant to neutralizing monoclonal antibodies]. Mol Biol (Mosk) 2015; 49:342-350. [PMID: 26065262] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Changes associated with the resistance to physical and chemical factors in the hemagglutinin (HA) of influenza A viruses may play an important role in the selection of different influenza variants during circulation in nature. Here, we studied the escape mutants of influenza virus A/mallard/Pennsylvania/10218/84 (H5N2) that were selected by the monoclonal antibody. The escape mutant m4F11(4) carried a single amino acid substitution in large subunit (HA1) of the HA, S145P1, and two ones, m4G10(10) and m4G10(6), had additional amino acid changes in the small subunit (HA2), namely: L124F2 and L124F2 + N79D2, respectively. As it has been found the substitutions appeared in the HA2 of m4G(10) and m4G(6) viruses compensated negative effect of the S145P1 mutation and provided a significant increase in the viral replication ability at the early stage of infection in embryonated chicken eggs as well as in HA thermostability in comparison with m4F11(4) mutant. Phenotypic properties that provide advantages in the process of virus replication can play a role of the positive selection factor in viral population.
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16
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Masalova OV, Chichev EV, Fediakina IT, Mukasheva EA, Klimova RR, Shchelkanov MI, Burtseva EI, Ivanova VT, Kushch AA, L'vov DK. [Detection of conservative and variable epitopes of the pandemic influenza virus A(H1N1)pdm09 hemagglutinin using monoclonal antibodies]. Vopr Virusol 2014; 59:34-40. [PMID: 25335417] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The goal of this work was to analyze the antigenic structure of the hemagglutinin (HA) of the pandemic influenza virus A(H1N1)pdm09 using monoclonal antibodies (MAbs) and to develop a sandwich ELISA for identification of pandemic strains. Competitive ELISA demonstrated that 6 MAbs against HA of the pandemic influenza A/ IIV-Moscow/01/2009 (H1N1)pdm09 virus identified six epitopes. Binding of MAbs with 22 strains circulating in Russian Federation during 2009-2012 was analyzed in the hemagglutination-inhibition test (HI). The MAbs differed considerably in their ability to decrease the HI activity of these strains. MAb 5F7 identified all examined strains; MAbs 3A3 and 10G2 reacted with the majority of them. A highly sensitive sandwich ELISA was constructed based on these three MAbs that can differentiate the pandemic influenza strains from the seasonal influenza virus. The constancy of the HA epitope that reacts with MAb 5F7 provides its use for identification of the pandemic influenza strains in HI test. MAbs 3D9, 6A3 and 1E7 are directed against the variable HA epitopes, being sensitive to several amino acid changes in Sa, Sb, and Ca2 antigenic sites and in receptor binding site. These MAbs can be used to detect differences in HA structure and to study the antigenic drift of the pandemic influenza virus A(H1N1)pdm09.
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MESH Headings
- Antibodies, Monoclonal/chemistry
- Antibodies, Monoclonal/immunology
- Antibodies, Viral/chemistry
- Antibodies, Viral/immunology
- Antibody Specificity
- Antigens, Viral/chemistry
- Antigens, Viral/genetics
- Antigens, Viral/immunology
- Enzyme-Linked Immunosorbent Assay
- Epitopes/chemistry
- Epitopes/genetics
- Epitopes/immunology
- Genetic Drift
- Hemagglutinins/chemistry
- Hemagglutinins/genetics
- Hemagglutinins/immunology
- Humans
- Influenza A Virus, H1N1 Subtype/chemistry
- Influenza A Virus, H1N1 Subtype/genetics
- Influenza A Virus, H1N1 Subtype/immunology
- Influenza, Human/epidemiology
- Influenza, Human/immunology
- Influenza, Human/virology
- Moscow/epidemiology
- Pandemics
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17
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Masalova OV, Lesnova EI, Ivanov AV, Pichugin AV, Permiakova KI, Smirnova OA, Tynitskaia VL, Ulanova TI, Burkov AN, Kochetkov SN, Ataullakhanov RI, Kushch AA. [Comparative analysis of the immune response to DNA constructions encoding hepatitis C virus nonstructural proteins]. Vopr Virusol 2013; 58:21-28. [PMID: 23785766] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
A promising approach to construction of antiviral vaccines consists in activation of cellular immunity with the DNA vaccines. The goal of this work was to evaluate the efficacy of genetic immunization of mice with DNA pcNS3-NS5B encoding five hepatitis C virus (HCV) nonstructural proteins: NS3, NS4A, NS4B, NS5A, and NS5B in comparison with plasmids containing genes of same individual nonstructural proteins. The DNA constructions were injected intramuscularly in DBA mice three times. The humoral immune response was assessed with ELISA; cellular immune response--in blast transformation reaction, by quantitation of CD4+ and CD8+ T cell proliferation using flow cytofluorometry, by intracellular synthesis and secretion of IFN-gamma and IL-2 in ELISpot and ELISA. It was found that the functionally active T cell response was achieved to antigens presenting NS3, NS4, NS5A, and NS5B epitopes of different HCV genotypes in response to pcNS3-NS5B plasmid and was stronger than that to plasmids carrying individual genes. A high proliferation rate of CD4+ T cells, secretion of IL-2 and IFN-gamma, induction of anti-NS3 and anti-NS5B IgG2a were demonstrated. These findings indicate that DNA construction pcNS3-NS5B is one of promising candidates for anti-HCV vaccine developing.
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MESH Headings
- Animals
- Antibodies, Viral/blood
- Antibodies, Viral/immunology
- Cell Line, Tumor
- Hepacivirus/genetics
- Hepacivirus/immunology
- Hepacivirus/metabolism
- Hepatitis C/genetics
- Hepatitis C/immunology
- Hepatitis C/metabolism
- Hepatitis C/prevention & control
- Humans
- Immunity, Cellular/drug effects
- Immunity, Cellular/genetics
- Immunity, Humoral/drug effects
- Immunity, Humoral/genetics
- Interferon-gamma/biosynthesis
- Interferon-gamma/immunology
- Interleukin-2/biosynthesis
- Interleukin-2/immunology
- Mice
- T-Lymphocytes/immunology
- T-Lymphocytes/metabolism
- Vaccines, DNA/genetics
- Vaccines, DNA/immunology
- Vaccines, DNA/metabolism
- Vaccines, DNA/pharmacology
- Viral Hepatitis Vaccines/genetics
- Viral Hepatitis Vaccines/immunology
- Viral Hepatitis Vaccines/metabolism
- Viral Hepatitis Vaccines/pharmacology
- Viral Nonstructural Proteins/biosynthesis
- Viral Nonstructural Proteins/genetics
- Viral Nonstructural Proteins/immunology
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18
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Masalova OV, Lesnova EI, Shingarova LN, Tunitskaia VL, Ulanova TI, Burkov AN, Kushch AA. [The combined application of nucleotide and amino acid sequences of NS3 hepatitis C virus protein, DNA encoding granulocyte macrophage colony-stimulating factor and inhibitor of regulatory T cells induces effective immune response against hepatitis C virus]. Mol Biol (Mosk) 2012; 46:525-534. [PMID: 22888642] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Hepatitis C is related to the most important socially significant human infectious diseases; however, vaccine against this virus up to now has notbeen created. One of the possible components of vaccine is the nonstructural protein NS3 of hepatitis C virus (HCV), which is synthesized in the infected cells and displays protease, NTPase, and helicase enzymatic activities. The connection between the effectiveness ofT cellular response to NS3 epitopes and the spontaneous resolution of acute hepatitis C was shown. The purpose of this work was to compare the immune response of mice to the inoculation of nucleotide and amino acid sequences of HCV NS3 and their combination, to evaluate the adjuvant activity of the DNA encoding granulocyte macrophage colony-stimulating factor (GM-CSF) and the influence of regulatory T cells on the effectiveness of immune response. The maximum anti-HCV NS3 antibody level in the serum (to 1:640000) induced the recombinant protein rNS3 introduced with aluminum hydroxide. The most intensive cellular immune response was observed after the simultaneous administration of rNS3 and DNAs encoding full-size NS3 and GM-CSF. A high level of lymphocyte proliferation, accumulation of IFN-gamma-secreting cells and IFN-gamma, and IL-2 release in response to the stimulators--NS3 antigens of different composition were observed in this group of mice. It has been established that the suppression of regulatory T cells in vitro leads to the statistically significant increase in the secretion of IFN-gamma. Thus, simultaneous application of rNS3 along with the DNAs encoding full-size NS3 and GM-CSF is promising approach for development of hepatitis C vaccine. The expediency of inclusion in the vaccine composition of regulatory T cell inhibitors will be clear after special studies.
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Ivanov AV, Smirnova OA, Ivanova ON, Masalova OV, Kochetkov SN, Isaguliants MG. Hepatitis C virus proteins activate NRF2/ARE pathway by distinct ROS-dependent and independent mechanisms in HUH7 cells. PLoS One 2011; 6:e24957. [PMID: 21931870 PMCID: PMC3172309 DOI: 10.1371/journal.pone.0024957] [Citation(s) in RCA: 123] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2011] [Accepted: 08/25/2011] [Indexed: 12/16/2022] Open
Abstract
Hepatitis C virus (HCV) is a highly pathogenic human virus associated with liver fibrosis, steatosis, and cancer. In infected cells HCV induces oxidative stress. Here, we show that HCV proteins core, E1, E2, NS4B, and NS5A activate antioxidant defense Nrf2/ARE pathway via several independent mechanisms. This was demonstrated by the analysis of transient co-expression in Huh7 cells of HCV proteins and luciferase reporters. Expression, controlled by the promoters of stress-response genes or their minimal Nrf2-responsive elements, was studied using luminescence assay, RT-qPCR and/or Western-blot analysis. All five proteins induced Nrf2 activation by protein kinase C in response to accumulation of reactive oxygen species (ROS). In addition, expression of core, E1, E2, NS4B, and NS5A proteins resulted in the activation of Nrf2 in a ROS-independent manner. The effect of core and NS5A was mediated through casein kinase 2 and phosphoinositide-3 kinase, whereas those of NS4B, E1, and E2, were not mediated by either PKC, CK2, PI3K, p38, or ERK. Altogether, on the earliest stage of expression HCV proteins induced a strong up-regulation of the antioxidant defense system. These events may underlie the harmful effects of HCV-induced oxidative stress during acute stage of hepatitis C.
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Affiliation(s)
- Alexander V Ivanov
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow, Russia.
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20
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Masalova OV, Klimova RR, Chichev EV, Fediakina IT, Loginova SY, Borisevich SV, Bondarev VP, Deryabin PG, Lvov DK, Kushch AA. Development of monoclonal antibodies to highly pathogenic avian influenza H5N1 virus and their application to diagnostics, prophylaxis, and therapy. Acta Virol 2011; 55:3-14. [PMID: 21434700 DOI: 10.4149/av_2011_01_3] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
A panel of 17 monoclonal antibodies (MAbs) against highly pathogenic avian influenza virus (HPAIV) A/Duck/Novosibirsk/56/05 A/H5N1 (subclade 2.2) isolated in Russian Federation was developed. Immunoblot analysis showed that 12 MAbs were specific for the hemagglutinin (HA) and 5 MAbs for nucleoprotein (NP). All anti-HA MAbs were reactive in ELISA and immunofluorescence (IF) test and 10 of them were reactive in hemagglutination-inhibition (HI) and neutralization tests. Quantitative competitive ELISA revealed that anti-HA MAbs recognized at least 4 non-overlapping antigenic determinants and anti-NP MAbs recognized at least 3 non-overlapping antigenic determinants. Four sandwich ELISA procedures were developed using the obtained MAbs. These procedures are useful for 1) identification of avian, human, and swine influenza A viruses, 2) differentiation of avian influenza virus (AIV) from human and swine influenza viruses, 3) differentiation of AIV H5 from other AIV subtypes, and 4) differentiation between 2.2 and 2.3.2 subclades of H5N1 influenza viruses. Prophylactic and therapeutic efficacy of anti-HA MAbs with high neutralization activity was tested in BALB/c mice. A complete protection was achieved by single injection of MAbs (20 mg/kg) 24 hrs before challenge with 10 LD50 of HPAIV H5N1. Therapeutic efficacy was 90% that was similar to those of Rimantadine and Tamiflu.
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Affiliation(s)
- O V Masalova
- Russian Academy of Medical Sciences, Moscow, Russian Federation.
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21
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Klimova RR, Masalova OV, Burtseva EI, Chichev EV, Lesnova EI, Oskerko TA, Mukasheva EA, Rudneva IA, Lvov DK, Kushch AA. [Monoclonal antibodies with high virus-neutralizing activity against pandemic influenza virus A/llV-Moscow/01/2009 (H1N1)swl]. Vopr Virusol 2011; 56:15-20. [PMID: 21786621] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The authors have obtained a panel of 7 monoclonal antibodies (MAbs) against pandemic influenza virus A/IIV-Moscow/01/2009 (HIN1)swl isolated in Russia. One MAb is directed to a NP protein linear epitope and interacts with all the influenza A viruses under study. Six other MAbs are directed to H1 hemagglutinin conformation-dependent determinants and detect homologous virus in the hemagglutination-inhibition test, enzyme immunoassay, immunofluorescence and virus neutralization tests. MAbs differentiate pandemic influenza viruses A(H1N1)swl from seasonal influenza A(H1N1), A(H3N2), and B viruses. The high neutralizing activity of MAbs permits their use to study the fine antigen structure of influenza virus hemagglutinin and to differentiate the A(H1N1) pandemic influenza viruses and offers promise for obtaining humanized antibodies in order to make specific prevention and treatment of influenza.
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MESH Headings
- Animals
- Antibodies, Monoclonal/immunology
- Antibodies, Monoclonal/isolation & purification
- Antibodies, Neutralizing/immunology
- Antibodies, Neutralizing/isolation & purification
- Antibodies, Viral/immunology
- Antibodies, Viral/isolation & purification
- Antigens, Viral/chemistry
- Antigens, Viral/immunology
- Antigens, Viral/metabolism
- Fluorescent Antibody Technique
- Hemagglutination Inhibition Tests
- Hemagglutinin Glycoproteins, Influenza Virus/immunology
- Hemagglutinin Glycoproteins, Influenza Virus/metabolism
- Humans
- Immunoenzyme Techniques
- Influenza A Virus, H1N1 Subtype/chemistry
- Influenza A Virus, H1N1 Subtype/immunology
- Influenza A Virus, H1N1 Subtype/metabolism
- Influenza A Virus, H3N2 Subtype/immunology
- Influenza B virus/immunology
- Influenza Vaccines/immunology
- Influenza, Human/diagnosis
- Influenza, Human/epidemiology
- Influenza, Human/immunology
- Influenza, Human/prevention & control
- Influenza, Human/virology
- Mice
- Mice, Inbred BALB C
- Molecular Conformation
- Moscow
- Neutralization Tests
- Pandemics
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22
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Varich NL, Sadykova GK, Prilipov AG, Kochergin-Nikitsky KS, Kushch AA, Masalova OV, Klimova RR, Gitelman AK, Kaverin NV. Antibody-Binding Epitope Differences in the Nucleoprotein of Avian and Mammalian Influenza A Viruses. Viral Immunol 2011; 24:101-7. [DOI: 10.1089/vim.2010.0088] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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23
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Rudneva IA, Kushch AA, Masalova OV, Timofeeva TA, Klimova RR, Shilov AA, Ignatieva AV, Krylov PS, Kaverin NV. Antigenic epitopes in the hemagglutinin of Qinghai-type influenza H5N1 virus. Viral Immunol 2010; 23:181-7. [PMID: 20373998 DOI: 10.1089/vim.2009.0086] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The highly pathogenic avian influenza H5N1 viruses have become widespread and evolved into several clades. In our previous studies, the antigenic sites of the H5 hemagglutinin (HA) were characterized by selection and sequencing of escape mutants. In the present studies we analyzed the antigenic epitopes recognized by monoclonal antibodies against avian influenza A/Duck/Novosibirsk/56/05 (H5N1) virus isolated in western Siberia and belonging to subclade 2.2 of the H5N1 viruses. The analysis revealed several antigenically relevant positions of amino acid residues in the globular head of the HA not encountered earlier in the escape mutants of the H5 subtype. The newly recognized positions (113, 117, 118, 120, and 123, mature H5 numbering) are concentrated in an area adjacent to the region described in earlier studies as corresponding to site B in H3 HA, but extending far beyond this area. The amino acid positions recognized by the monoclonal antibodies against A/Duck/Novosibirsk/56/05 (H5N1) virus differ from the positions recognized by the monoclonal antibodies against H5N2 influenza viruses. The data suggest that the evolution of the HA of H5 avian influenza viruses is associated not only with the changes of antigenic epitopes recognized by antibodies, but also with a change in the dominance of the immunogenicity of different sites in the HA.
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Affiliation(s)
- Irina A Rudneva
- D.I. Ivanovsky Institute of Virology, Russian Academy of Medical Sciences, Moscow, Russia
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24
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Masalova OV, Lesnova EI, Pichugin AV, Melnikova TM, Grabovetsky VV, Petrakova NV, Smirnova OA, Ivanov AV, Zaberezhny AD, Ataullakhanov RI, Isaguliants MG, Kushch AA. The successful immune response against hepatitis C nonstructural protein 5A (NS5A) requires heterologous DNA/protein immunization. Vaccine 2010; 28:1987-96. [PMID: 20188254 DOI: 10.1016/j.vaccine.2009.10.097] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The aim of this study was to evaluate the immunogenicity of NS5A protein of human hepatitis C virus (HCV) when delivered as naked DNA (NS5A DNA), or recombinant protein (rNS5A). DBA/2J mice received NS5A DNA, rNS5A, or NS5A DNA/rNS5A in different prime-boost combinations with a peptidoglycan Immunomax((R)). The weakest response was induced after rNS5A prime and NS5A DNA boost; rNS5A alone induced an immune response with a strong Th2-component; and NS5A DNA alone, a relatively weak secretion of IL-2 and IFN-gamma. The most efficient was co-injection of NS5A DNA and rNS5A, which induced a significant increase in CD4(+) and CD8(+) T-cell counts, anti-NS5A antibodies, specific T-cell proliferation, and proinflammatory cytokine production in vitro against a broad spectrum of NS5A epitopes. Administration of the mixture of adjuvanted DNA and protein immunogens can be selected as the best regimen for further preclinical HCV-vaccine trials.
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Affiliation(s)
- Olga V Masalova
- D.I. Ivanovsky Institute of Virology, Russian Academy of Medical Sciences, Gamaleya str. 16, 123098 Moscow, Russian Federation.
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25
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Masalova OV, Lesnova EI, Grabovetskiĭ VV, Smirnova OA, Ulanova TI, Burkov AN, Ivanov AV, Zaberezhnyĭ AD, Ataullakhanov RI, Kushch AA. [DNA immunization with a plasmid containing gene of hepatitis C virus protein 5A (NS5A) induces the effective cellular immune response]. Mol Biol (Mosk) 2010; 44:275-283. [PMID: 20586188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
In spite of extensive research, no effective vaccine against hepatitis C virus (HCV) has been developed so far. DNA immunization is a potent technique of vaccine design strongly promoting the cellular arm of immune response. The genes encoding nonstructural HCV proteins (NS2-NS5B) are promising candidates for vaccine development. NS5A is a protein involved in viral pathogenesis, in the induction of immune response, and probably in viral resistance to interferon treatment. The objective of this study was to construct a DNA vaccine encoding NS5A protein and evaluate its immunogenicity. A plasmid encoding a full-size NS5A protein was produced using the pcDNA3.1 (+) vector for eukaryotic expression system. The expression of the NS5A gene was confirmed by immunoperoxidase staining of the transfected eukaryotic cells with anti-NS5A monoclonal antibodies. Triple immunization of mice with the plasmid vaccine induced a pronounced cellular immune response against abroad spectrum of NSSA epitopes as assessed by T-cell proliferation andsecretion of antiviral cytokines IFN-gamma and IL-2. In in vitro T-cell stimulation experiments, NS5A-derived antigens were modeled by synthetic peptides, recombinant proteins of various genotypes, and phages carrying exposed NS5A peptides. A novel immunomodulator Immunomax showed high adjuvant activity in DNA immunization. The data obtained indicate that the suggested DNA construct has a strong potential in the development of the gene vaccines against hepatitis C.
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26
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Kushch AA, Klimova RR, Masalova OV, Fedorova NE, Botikov AG, Fediakina IT, Burtseva EI, Isaeva EI, Deriabin PG, L'vov DK. [Monoclonal antibodies to highly pathogenic avian influenza A(H5N1) strain isolated in the Russian Federation: development and properties]. Vopr Virusol 2008; 53:9-14. [PMID: 19069786] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Highly pathogenic avian influenza (HPAI) virus subtype H5N1 has recently caused extensive epizootics in different regions of the world and presents a serious threat to man. Since 2005, HPAI virus subtype H5N1 strains have been circulating in Russia, which differ from the earlier isolated Southern Asia strains. A panel from 15 monoclonal antibodies (Mabs) to HPAI virus A/duck/Novosibirsk/56/05 (H5N1) was developed. Eleven Mabs interacted with the hemagglutinin molecule (HA), 4 with influenza A virus nucleoprotein (NP) in the Western blot assay. The bulk of the obtained Mabs interacted with homologous virus in ELISA and showed an antigen in the infected cells in the indirect immunofluorescence assay. Nine Mabs were active in the hemagglutination inhibition (HI) assay and 8 of them were capable to neutralize viral activity. The comparative analysis of the properties of Mabs in the HI assay using various influenza A strains showed that Mabs 2C6, 6F3, 4G10, 3G9, and 7B3 inhibited hemagglutination of study avian influenza viruses subtype H5, Mab 6F3 being most active. Mab 3B5 reacted only with the viruses isolated in the Russian Federation in 2005-2007 and failed to interact with the other study influenza A viruses subtype H5. The obtained panel of Mabs can be used to study the fine antigenic structure of hemagglutinin and to make a differential diagnosis of avian influenza viruses subtype A/H5N1. The high neutralizing activity of Mabs creates a prospect for preparing humanized antibodies for specific prevention and treatment.
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MESH Headings
- Animals
- Antibodies, Monoclonal/biosynthesis
- Antibodies, Monoclonal/immunology
- Antibodies, Monoclonal/isolation & purification
- Antibodies, Viral/biosynthesis
- Antibodies, Viral/immunology
- Antibodies, Viral/isolation & purification
- Antibody Specificity
- Birds
- Female
- Fluorescent Antibody Technique, Indirect
- Hemagglutination Inhibition Tests
- Hemagglutinin Glycoproteins, Influenza Virus/immunology
- Immunoblotting
- Immunoenzyme Techniques
- Influenza A Virus, H5N1 Subtype/immunology
- Influenza in Birds/diagnosis
- Influenza in Birds/immunology
- Mice
- Mice, Inbred BALB C
- Neutralization Tests
- Nucleocapsid Proteins
- RNA-Binding Proteins/immunology
- Viral Core Proteins/immunology
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27
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Masalova OV, Vishnevskaia TV, Shkurko TV, Garanzha TA, Tupoleva TA, Filatov FP, Blokhina NP, Kushch AA. [Comparative analysis of hepatitis C virus core protein in the plasma and serum samples from HCV-infected blood donors and patients with hepatitis C]. Vopr Virusol 2007; 52:11-7. [PMID: 17722604] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
The aim of the study was to develop a sensitive and specific method for revealing the direct marker of hepatitis C virus (HCV)--core protein in the serum and to test it in the laboratory setting. Experiments were made on plasma and serum samples from asymptomatic HCV-seropositive blood donors (n=65), patients with acute (AHC) and chronic (CHC) hepatitis C (n=295), and HCV-seronegative blood donors (n=20). The processing protocol for serum included their concentration by means of polyethylene glycol and subsequent treatments of pellets to detect core protein in free virions, nonenveloped nucleocapsids, and immune complexes. This allowed an assay to be developed for the detection of core protein, by using a sandwich ELISA. Inclusion of a combination of three original monoclonal antibodies into the sandwich could reveal in the samples core proteins of at least 3 genotypes of HCV (1, 2, and 3) with a sensitivity of 20 pg/ml in the majority of HCV-infected subjects. The results of determination of core protein and HCV RNA correlated with a high degree of sensitivity. To detect HCV in the blood of patients with AHC, it was shown to be sufficient to find freely circulating virions whereas an analysis of immune complexes should be included in cases of CHC to achieve more sensitivity. The findings are a basis for developing a test system for the diagnosis of hepatitis C, including its early stages before seroconversion and for determining a viral load during interferon therapy. Introduction of the method into practice increases the reliability of the diagnosis of hepatitis C and virus-free safety of blood transfusions.
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28
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Rechkina EA, Denisova GF, Masalova OV, Lideman LF, Denisov DA, Lesnova EI, Ataullakhanov RI, Gur'ianova SV, Kushch AA. [Epitope mapping of antigenic determinants of hepatitis C virus proteins by phage display]. Mol Biol (Mosk) 2006; 40:357-68. [PMID: 16637277] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Study of individual hepatitis C (HCV) proteins could help to find a molecular structure and conformation, localization of antigenic and immunogenic determinants, to reveal of protective epitopes. It is necessary for practical medicine - development of diagnostic test-systems, vaccines and therapeutics. Linear and conformation dependent epitopes of HCV proteins was localized in this work and immunogenic properties of phage displayed peptides screened on monoclonal antibodies to HCV proteins have been investigated. Eleven epitopes of four HCV proteins have been studied. Three epitopes was found as linear, two epitopes were dependent on secondary structure of proteins and one epitope was dependent on tertiary structure of NS3 protein. Aminoacid sequences of other determinants have been determined and the distinct localization of these determinants will be continued after discovering of tertiary structure of HCV proteins. It was shown, that phage mimotope 3f4 is immunogenic and could induce specific hu- moral immune response to NS5A HCV protein. The data obtained could be useful for improving of HCV diagnostic test-systems, studying of amino acid substitutions and its influence on antigenic properties of the HCV proteins. The results could help to study an immune response in patients infected with different genotypes of HCV. Phage displayed peptides mimicking the antigenic epitopes of HCV proteins could be applied to development of HCV vaccine.
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Masalova OV, Rechkina EA, Shkurko TV, Kelli EI, Blokhina NP, Vishnevskaia TV, Zavalishina LE, Petrov AN, Frank GA, Malyshev NA, L'vov DK, Kushch AA. [Hepatitis C virus proteins in the liver cells in acute hepatitis C: their association with liver damage and with the outcome of the disease]. Vopr Virusol 2005; 50:18-23. [PMID: 16104517] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
The accumulation of individual hepatitis C virus (HCV) proteins in the liver cells of patients with acute hepatitis C (AHC) and their association with the course and outcome of the disease were studied. AHC protein expression in the cryostat liver sections from 20 patients with AHC was estimated by immunohistochemical assay using original monoclonal antibodies to 5 HCV proteins (core, NS3, NS4A, NS4B, and NS5A). The results of HCV detection in the patients were compared with their biochemical, clinical, and morphological findings. HCV proteins were totally revealed in the livers of all the patients, individual proteins were identified with a frequency of 89-95%, which is significantly more than those in patients with chronic hepatitis C. The hepatic expression of core protein was shown to inversely correlate with the duration of an acute period. There was a direct relationship between the accumulation of core, NS3, and NS5A proteins and the liver tissue damage caused by stepwise necrosis rather than intralobular necrosis. The presumed convalescence was ascertained to be associated with the larger count of hepatocytes containing the proteins NS4A and NS3 early after AHC manifestation.
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30
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Masalova OV, Abdulmedzhidova AG, Morgunov KV, Grishchenko SV, Shkurko TV, Lakina EI, Kelli EI, L'vov DK, Kushch AA. [Changes of humoral and cellular immunity in chronic hepatitis C patients of different staging]. Vopr Virusol 2003; 48:15-9. [PMID: 12894474] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/04/2023]
Abstract
The purpose of the present study was to investigate the influence produced by viral proteins in the hepatic cells and RNA of hepatitis C virus (HCV) on the indices of T- and B-cell response in 52 patients with chronic hepatitis C (CHC). A relative count of peripheral-blood lymphocytes (PBL), expressing antigens CD3+, CD4+, CD8+, CD16+, CD20+ and CD95+ was estimated. The repertoire of antibodies to HCV proteins was specified. The thus obtained data were compared with an activity and a disease stage by using the histological diagnosis and alanine-amino-transferase (ALT) level as well as with the presence of HCV RNA in the serum and viral protein of the liver. Such comparison of data and the use of the correlation analysis made it possible to establish that the antibodies to NS5 protein were detected reliably more often in patients with a more pronounced hepatic fibrosis, with a higher ALT activity and with expression of HCV proteins in the liver. At the same time, the presence of proteins in the liver and of RNA in the serum were accompanied by a more active humoral response to the non-structure proteins of NS4 and NS5 as well as by more profound discrepancies of the immunity T-cell chain (a lowered ratio of CD4+/CD8+ and a smaller content of CD95+). There were no differences between PBL of the studied populations in patients with various activities and an HCV stage. A relatively bigger quantity of CD95(+)--positive PBL was found to be reliably higher in patients with viremia but lower in those cases, in which HCV proteins were detected in the liver. This confirms the inhibiting ability of HCV proteins to the Fas-mediated apoptose of PBL in CHC patient.
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31
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Masalova OV, Abdulmedzhidova AG, Shkurko TV, Kelli EI, Atanadze SN, Zavalishina LE, Frank GA, Kuzina OV, L'vov DK, Kushch AA. [Analysis of hepatitis C virus proteins in hepatic cells of patients with chronic hepatitis C]. Vopr Virusol 2003; 48:9-14. [PMID: 12608053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/01/2023]
Abstract
A correlation between the detection of proteins and an activity of the pathological process was analyzed in a study of the content of the C virus hepatitis (CVH) proteins in hepatic cells of patients with chronic C hepatitis (CCH). The expression of CVH proteins in frozen sections of biopsy samples of 69 CCH patients was evaluated by using the immune-histological method involving original monoclonal antibodies (MCA) to 5 CVH proteins. The results of the detection of proteins in patients were compared with an activity and stage of CCH (by using histological tests and a level of alanine aminotransferase--AAT). A set of the CVH proteins were found in the liver of 74% of patients, i.e. core proteins, NS3, NS4A, NS4B and NS5A--in 28, 43, 43, 55 and 58%, respectively. All studied proteins were detected in the cytoplasm of hepatocytes. Proteins were found in the liver more often as compared with the detection rate of CVH RNA in the blood serum (61%). This demonstrates a high sensitivity of the discussed test at detecting the CVH infection. The accumulation of the core protein was shown to correlate with the presence of the replicative form of CVH RNA in the liver and with a higher level of AAT. The quantity of NS5 A-expressing cells correlated directly with a CCH stage. The quantity of NSB- and NS3-positive hepatocytes correlated negatively with an activity of the inflammatory-and-necrotic processes in the liver. Hyper-fermentation was found more often among the antigen-positive patients. The CCH histological activity was proven to be reliably higher at a simultaneous detection of CCH proteins in the liver and of CVH RNA--in the serum.
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Masalova OV, Lakina EI, Abdulmedzhidova AG, Atanadze SN, Semiletov YA, Shkurko TV, Burkov AN, Ulanova TI, Pimenov VK, Novikov VV, Khudyakov YE, Fields H, Kushch AA. Characterization of monoclonal antibodies and epitope mapping of the NS4 protein of hepatitis C virus. Immunol Lett 2002; 83:187-96. [PMID: 12095709 DOI: 10.1016/s0165-2478(02)00081-0] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Recombinant DNA containing sequences of HCV NS4 protein was expressed in Escherichia coli cells. Six hybridoma clones producing monoclonal antibodies (MAB) to recombinant NS4 protein (rNS4), aa 1677-1756, were developed. Mapping with a panel of 33 peptides and reciprocal competitive EIA have shown that MAB obtained revealed five antigen determinants, not described earlier: MAB 3F11 and 3F12-one genotype-independent epitope of NS4A (aa 1700-1707) common for genotypes 1, 2 and 3; MAB 1D11-genotype-independent epitope (aa 1713-1728) and MAB 1D3-genotype (subtype 1b)-specific epitope of NS4B (aa 1711-1731); MAB 6B11 and C1-two conformation-dependent determinants in 5-1-1 region. These data indicate that the 5-1-1 region of NS4 protein has a complex antigenic structure and contains at least eight epitopes, including five, revealed in the present work. MAB obtained recognized native viral protein in the cytoplasm of liver cells of patients with chronic hepatitis C. The positive rates of the immunostaining for NS4 antigen using MAB 6B11, 1D11 and 3F12 were 64, 59 and 50%, respectively. It was found that 6B11 MAB to a conformation-dependent epitope much more actively interacts with native NS4 than with the recombinant protein to which MAB was developed. The epitope recognized by 6B11 MAB is highly immunogenic since it induces the B-cell response in all patients investigated with identified anti-NS4 antibodies in blood serum. The MAB panel obtained in this study may become a useful tool for the diagnostic purposes, for the investigation of NS4B function and for the host-viral interactions at the cell level.
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Affiliation(s)
- O V Masalova
- The Ivanovsky Institute of Virology, Russian Academy of Medical Sciences, Gamaleya str. 16, Moscow 123098, Russia
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Iushchuk ND, Klimofa EA, Znoĭko OO, Pyleva OG, Kelli EI, Cheshik DS, Braginskiĭ DM, Lakina EI, Masalova OV, Kushch AA. [The role of hepatitis C virus RNA detection in various substrates of patients with chronic hepatitis C]. Klin Med (Mosk) 2002; 79:24-8. [PMID: 11840806] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
Puncture biopsy of the liver and blood count were made in 72 patients with chronic hepatitis C (CHC). Morphological alterations in the liver were assessed by Knodell index. The blood serum, lymphocytes and hepatic tissue were examined for a genome form of hepatitis C virus (HCV) RNA, blood lymphocytes and hepatic tissue--for a relevant replication form. HCV RNA was detected using "nested" RT-PCR. Only 26% patients had symptoms of asthenovegetative and dyspeptic syndromes. Normal alaninaminotransferase (ALT) level was observed in 24% patients, the rest had it high. HCV RNA was encounted more frequently in hepatic tissue than lymphocytes or serum (83, 68 and 46%, respectively). A replication form of HCV RNA was present in hepatic tissue of 31% patients and was absent in the lymphocytes. The incidence of the RNA detection was not related either to the disease symptoms or morphological alterations in hepatic tissue. The occurrence of the genome and replication forms in hepatic tissue does not correlate to ALT level. HCV RNA occurs more often in the serum, blood lymphocytes and in three substrates simultaneously in patients with hyperalatemia.
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Masalova OV, Abdulmedzhidova AG, Atanadze SN, Lakina EI, Semiletov Y, Burkov AN, Ulanova TI, Novikov VV, Pimenov VK, Filds G, Khudyakov Y, Kushch AA. Characterization of a panel of monoclonal antibodies and mapping the epitopes of hepatitis C virus proteins. DOKL BIOCHEM BIOPHYS 2002; 383:125-9. [PMID: 12058366 DOI: 10.1023/a:1015344003895] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- O V Masalova
- Ivanovsky Research Institute of Virology, Russian Academy of Medical Sciences, ul. Gamaleya 16, Moscow, 123098 Russia
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Abdulmedzhidova AG, Masalova OV, Atanadze SN, Ulanova TI, Burkov AN, Khudiakov IE, Fields H, Kushch AA. [Characterization of a panel of monoclonal antibodies to hepatitis C NS3 recombinant protein ]. Vopr Virusol 2002; 47:21-5. [PMID: 11852778] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
Recombinant protein rNS3 imitating helicase region (1356-1459 amino acid residues) of hepatitis C virus (HCV) was expressed in E. coli cells and used for BALB/c mice immunization. Seven hybrydoma clones producing monoclonal antibodies (MAbs) to rHS3 were obtained. All MAbs reacted in ELISA with NS3 protein from Murex anti-HCV Version III and in immunoblotting from RIBA 3. These MAbs detect 5 individual epitopes, 4 of which were conformational and 1 discontinuous. All MAbs could compete for rNS3 binding with serum antibodies from patients with chronic hepatitis C, which suggests that these MAbs can recognize the natural HCV NS3 protein.
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Lakina EI, Samokhvalov EI, Levchenko OG, Masalova OV, Klimova EA, Znoĭko OO, Iushchuk ND, L'vov DK, Kushch AA. [Use of PCR for detection of positive (genomic) and negative (replicative) RNA chains of hepatitis C virus in the serum, lymphocytes, and liver of patients with chronic hepatitis C]. Vopr Virusol 2000; 45:37-41. [PMID: 10971965] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2023]
Abstract
The presence of viral RNA in liver tissue and peripheral blood serum and lymphocytes of patients with chronic hepatitis C (CHC) was studied by polymerase chain reaction with nested primers on the 5'-untranslated region of hepatitis C virus (HCV) genome. Positive (genome) RNA was more often detected in the liver (81% cases) than in the peripheral blood serum (55%) or lymphocytes (64%). Active replication of HCV (presence of negative RNA chains) was observed only in the liver (in 37% cases). Correlation between the frequency of HCV RNA detection in the liver, blood cells and sera and parameters of the inflammatory process activity (SGPT level, histologic activity index and sclerosis index) was investigated. No relationship between the studied parameters was revealed. Positive correlation between the presence of HCV genome RNA in lymphocytes and serum was detected. A tendency to a decrease in the incidence of replicative RNA of the virus in liver tissue with increase in the activity of chronic hepatitis C was observed.
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Masalova OV, Samokhvalov EI, Petrakova NV, Golosova TV, Somova AV, Amanadze SN, L'vov DK, Kushch AA. [Detection of hepatitis C markers--nucleocapsid protein, RNA and virus-specific antibodies in blood donor plasma]. Vopr Virusol 2000; 45:14-8. [PMID: 10765544] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Abstract
Comparative study of hepatitis C virus (HCV) markers (core protein, RNA, and virus-specific antibodies) was carried out in plasma samples from 80 donors. A method based on sandwich ELISA with monoclonal antibodies to recombinant protein was developed for measuring core protein. Nucleocapsid protein was detected after various treatments of precipitates obtained after concentration of virus-containing material from plasma samples. These treatments allowed differentiation of core protein in virions, free nucleocapsids, and immune complexes circulating in peripheral blood. The minimal detectable concentration was 5 pg/ml, maximal 850 pg/ml. The detection of core protein virtually coincided with the detection of HCV RNA: 94.4% RNA-positive samples contained the virus protein. Other parameters (activities of antibodies to HCV in ELISA and level of SGPT) did not allow differentiation of plasma samples by the presence of actively replicating virus. Assay of nucleocapsid protein in the plasma of subjects infected with HCV in various populations of virus particles is important from practical (for blood service) and theoretical viewpoints (for studies of virus pathogenesis mechanisms).
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Masalova OV, Shepelev AV, Atanadze SN, Parnes ZN, Romanova VS, Vol'pina OM, Semiletov IA, Kushch AA. [Immunostimulating effect of water-soluble fullerene derivatives--perspective adjuvants for a new generation of vaccine]. Dokl Akad Nauk 1999; 369:411-3. [PMID: 10613249] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/15/2023]
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Klimova RR, Masalova OV, Semenova TB, Grebencha SV, Abramova NB, Kushch AA. [The detection of the herpes simplex virus 1 and 2 antigens in clinical specimens by using monoclonal antibodies]. Zh Mikrobiol Epidemiol Immunobiol 1999:76-80. [PMID: 10876858] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Abstract
The possibility of using monoclonal antibodies (McAb), obtained earlier, for the detection of herpes simplex virus (HSV) in clinical specimens taken from sick and infected persons was studied. The examination of 90 persons revealed that the mixture of McAb 4A and 2C could effectively detect the presence of HSV antigen in the indirect immunofluorescence assay (IFA) directly in cells contained in cytological preparations (smears, scrapes, impressions) obtained from different organs of patients. The search of optimum combinations of McAb for the detection of HSV antigens by the method of the solid-phase enzyme immunoassay (EIA) was carried out. This study, made on purified HSV used as an experimental model, revealed that the maximum sensitivity could be achieved with the use of two McAb (4f6 and 7c4) out of three McAb (4f6, 7c4 and 3d10). The approbation of both variants of EIA on clinical specimens taken from 99 patients (blood clots, seminal fluid, scrapes of cervical canal cells, peripheral blood lymphocytes) showed that the addition of McAb 3d10 made it possible to detect 8 more positive specimens. 754 specimens from 337 patients were studied with the use of McAb-based EIA, and in 204 of these patients (61%) HSV antigen was detected. The results obtained with the use of our McAb were compared with the data obtained with certified commercial test systems. The coincidence of the EIA data with those obtained with the use of the Murex Wellcozyme HSV test system (UK) was registered in 75% of cases (in 15 out of 20 cases). The coincidence of the IFA data with those obtained with the use of the Sanofi test system (France) was observed in all 19 cases (100%).
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Affiliation(s)
- R R Klimova
- Ivanovsky Research Institute of Virology, Antiherpes Center of the Moscow Committee of Health, Russia
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Klimova RR, Masalova OV, Atanadze SN, Kushch AA. [Monoclonal antibodies in the diagnosis of infections caused by the herpes simplex virus]. Zh Mikrobiol Epidemiol Immunobiol 1999:99-103. [PMID: 10852033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Abstract
A series of hybridomas producing monoclonal antibodies (McAb), specifically interacting with Herpes simplex virus (HSV) proteins, types 1 and 2, has been obtained. McAb 7c4 and 4f6 have been shown to be highly active in the solid-phase enzyme immunoassay (EIA) and to produce no reaction with HSV antigen in the indirect immunofluorescent assay (IIFA). McAb 2b6, 3e5, 4A, 2C effectively detect McAb in IIFA, but not EIA, while McAb 3d 10 exhibit activity in both biochemical assays. Moreover, as established in this investigation, McAb 4A are active against the protein of HSV capsid, McAb 3d10 and 2b6 detect two individual epitopes on the molecule of ribonucleohydreductase, McAb 2C are specific with respect to surface glycoprotein gB, McAb 7c4 and 416 recognize one or two overlapping epitopes of protein gD. McAb 2C are capable of completely neutralizing the infectious activity of HSV in the in vitro cell system. As determined by IIFA, McAb 4A and 4e5 stain specific inclusions in the nucleus of HSV-infected cells, while McAb 2C stain HSV protein, localized in the cytoplasm. All above-mentioned McAb are active against two common antigenic determinants of HSV 1 and HSV 2. The data obtained in this investigation suggest that the series of McAb under study may serve as the basis for the development of diagnostic test systems for the detection of HSV, types 1 and 2, by EIA and IIFA techniques.
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Affiliation(s)
- R R Klimova
- Ivanovsky Research Institute of Virology, Moscow, Russia
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Pomelova VG, Bychenkova TA, Grigor'eva AM, Masalova OV, Zubkov VV, Barinskiĭ IF, L'vov ND, Kushch AA, Ivanova LA, Kudashov NI, Osin NS, Khramov EN. [The development and testing of test systems for the determination of herpes simplex virus and cytomegalovirus antigens by lanthanide immunofluorescence analysis]. Zh Mikrobiol Epidemiol Immunobiol 1999:113-7. [PMID: 10852037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Abstract
On the basis of the lanthanide immunofluorescent assay (LIFA) test systems for the determination of herpes simplex virus (HSV-LIFA) and cytomegalovirus (CMV-LIFA) antigens have been developed. The test system HSV-LIFA includes the sandwich of monoclonal antibodies (McAb) HSV A.3.3. or B-11 to type 2 HSV, strain BH; the test system CMV-LIFA includes the sandwich of rabbit McAb to CMV, strain AD 169. The approbation of the test systems has revealed that they insure the specific detection of HSV and CMV antigens in clinical specimens (urine, blood, liquor, saliva), the LIFA results well correlating with the data on the isolation of viruses in cell cultures, with the results obtained by other diagnostic methods and with clinical manifestations of diseases. LIFA has been shown to be more sensitive than the enzyme immunoassay.
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Affiliation(s)
- V G Pomelova
- State Research Institute of Biological Instruments, Moscow, Russia
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Masalova OV, Atanadze SN, Samokhvalov EI, Petrakova NV, Kalinina TI, Smirnov VD, Khudyakov YE, Fields HA, Kushch AA. Detection of hepatitis C virus core protein circulating within different virus particle populations. J Med Virol 1998; 55:1-6. [PMID: 9580878 DOI: 10.1002/(sici)1096-9071(199805)55:1<1::aid-jmv1>3.0.co;2-7] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Progress in studying pathogenesis and increasing the reliability of hepatitis C diagnosis can be achieved by analysis of different forms of virus particles circulating in blood of both patients and infected persons. Detection of hepatitis C virus (HCV) proteins faces two basic difficulties: low concentration of HCV proteins, and their blocking by antibodies. The aim of this work was to develop a method for the detection of nucleocapsid (core) protein in the plasma of HCV-infected persons using monoclonal antibodies (MABs). Twenty-seven anti-HCV-positive donor plasmas were studied of which 21 contained HCV RNA and 6 were negative. The plasmas were centrifuged for 3 hr at 143,000 g and the antigenic activity of core-protein was studied in the pellets by EIA using four MABs able to recognize four nonoverlapping determinants, two at N-terminus and two at C-terminus of recombinant core (1-150 aa). The determinants detected were present in the natural core protein of at least two genotypes (1b and 3a). Maximal efficiency of recombinant protein detection was achieved with 2 MABs, whereas a combination of 4 MABs was necessary for optimal detection of natural core protein. This is indicative of different conformational structures of natural protein and its gene-engineered analog. The sensitivity of core detection by monoclonal sandwich assay was 1 ng/ml in the pellet or 5 pg/ml after normalization to the initial plasma volume. To dissociate immune complexes, the pellet was treated with 2.5 M KBr after first treating the pellet with the nonionic detergent Tween 80 to remove the virus lipid envelope. Using this treatment protocol, core protein was found in 19 of 21 RNA positive plasmas.
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Affiliation(s)
- O V Masalova
- D.I. Ivanovsky Institute of Virology, Moscow, Russia
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Masalova OV, Atanadze SN, Kalinina TI, Petrakova NV, Smirnov VD, Fields H, Khudiakov IE, Kushch AA. [Immunochemical properties and specificity of monoclonal antibodies against N- and C-terminal sites of the recombinant protein of the nucleocapsid of hepatitis C virus (HCcAg)]. Vopr Virusol 1996; 41:150-3. [PMID: 8999667] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Highly affine murine monoclonal antibodies (MAB) to recombinant nucleocapsid (core) protein of hepatitis C virus (rHCcAg) expressed in E. coli were obtained. The MABs were analyzed by solid-phase enzyme immunoassay (EIA), immunodot, immunoblotting, and competitive immunochemical analysis. For estimating the epitope specificity of MAB, several immunoreactive fragments of different length were cloned from the HCcAg region overlapping 160 N-terminal amino acid (a. a.) residues. Use of these fragments and the competitive EIA demonstrated that MAB recognize 4 non-overlapping epitopes, 2 of which are localized in the 1-80 a. a. and 2 other in the 80-150 a. a. regions. A protocol of EIA for detecting HCcAg using MABs to two nonoverlapping HCcAg epitopes has been designed. The sensitivity of double-site sandwich is 1 ng/ml for the recombinant protein.
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