IL-6 induces long-term protective immunity against a lethal challenge of influenza virus. 1999

S W Lee, and J W Youn, and B L Seong, and Y C Sung
Department of Life Science, Center for Biofunctional Molecules, School of Environmental Engineering, Pohang University of Science and Technology, South Korea.

The coadministration of cytokines can modulate immunity in DNA based viral vaccines. In order to determine the effects of various cytokines on long-term protection against the influenza virus, mice were intramuscularly coinoculated with plasmids that encoded either the granulocyte-macrophage colony-stimulating factor (GMCSF), interleukin-4 (IL-4), interleukin-12 (IL-12), or the interleukin-6 (IL-6) gene, in the presence of two plasmids that encoded the nucleoprotein (NP) and the hemagglutinin (HA) gene of the influenza A virus. The coadministration of IL-4, IL-6 and IL-12 transiently enhanced antibody responses against influenza virus in early time points (4 to 7 week post immunization) after post inoculation. The expression of GMCSF gene resulted in the sustained elevation of antibody responses for at least 20 weeks post inoculation. However, NP-specific CTL responses decreased in these animals. Mice that received either the IL-12 or the IL-6 gene had enhanced NP-specific CTL responses. Remarkably, the coadministration of the IL-6 gene completely protected mice from a lethal challenge with influenza virus. Conversely, mice that received the IL-4 gene appeared to be more susceptible to lethal challenge than mice that were inoculated with the NP and the HA genes alone. These results demonstrate that the use of cytokines as molecular adjuvants when coadministered in influenza DNA vaccination must be specific. Our data also demonstrates that the coadministration of IL-6 should be considered to enhance the efficacy of influenza DNA vaccines.

UI MeSH Term Description Entries
D007252 Influenza Vaccines Vaccines used to prevent infection by viruses in the family ORTHOMYXOVIRIDAE. It includes both killed and attenuated vaccines. The composition of the vaccines is changed each year in response to antigenic shifts and changes in prevalence of influenza virus strains. The flu vaccines may be mono- or multi-valent, which contains one or more ALPHAINFLUENZAVIRUS and BETAINFLUENZAVIRUS strains. Flu Vaccine,Influenzavirus Vaccine,Monovalent Influenza Vaccine,Universal Flu Vaccine,Universal Influenza Vaccine,Flu Vaccines,High-Dose Trivalent Influenza Vaccine,Influenza Vaccine,Influenza Virus Vaccine,Influenza Virus Vaccines,Influenzavirus Vaccines,Intranasal Live-Attenuated Influenza Vaccine,LAIV Vaccine,Monovalent Influenza Vaccines,Quadrivalent Influenza Vaccine,Trivalent Influenza Vaccine,Trivalent Live Attenuated Influenza Vaccine,Universal Flu Vaccines,Universal Influenza Vaccines,Flu Vaccine, Universal,High Dose Trivalent Influenza Vaccine,Influenza Vaccine, Monovalent,Influenza Vaccine, Quadrivalent,Influenza Vaccine, Trivalent,Influenza Vaccine, Universal,Intranasal Live Attenuated Influenza Vaccine,Vaccine, Flu,Vaccine, Influenza,Vaccine, Influenza Virus,Vaccine, Influenzavirus,Vaccine, LAIV,Vaccine, Monovalent Influenza,Vaccine, Quadrivalent Influenza,Vaccine, Trivalent Influenza,Virus Vaccine, Influenza
D008807 Mice, Inbred BALB C An inbred strain of mouse that is widely used in IMMUNOLOGY studies and cancer research. BALB C Mice, Inbred,BALB C Mouse, Inbred,Inbred BALB C Mice,Inbred BALB C Mouse,Mice, BALB C,Mouse, BALB C,Mouse, Inbred BALB C,BALB C Mice,BALB C Mouse
D009976 Orthomyxoviridae Infections Virus diseases caused by the ORTHOMYXOVIRIDAE. Orthomyxovirus Infections,Infections, Orthomyxoviridae,Infections, Orthomyxovirus,Swine Influenza,Infection, Orthomyxoviridae,Infection, Orthomyxovirus,Influenza, Swine,Orthomyxoviridae Infection,Orthomyxovirus Infection
D005260 Female Females
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia
D000914 Antibodies, Viral Immunoglobulins produced in response to VIRAL ANTIGENS. Viral Antibodies
D013602 T-Lymphocytes, Cytotoxic Immunized T-lymphocytes which can directly destroy appropriate target cells. These cytotoxic lymphocytes may be generated in vitro in mixed lymphocyte cultures (MLC), in vivo during a graft-versus-host (GVH) reaction, or after immunization with an allograft, tumor cell or virally transformed or chemically modified target cell. The lytic phenomenon is sometimes referred to as cell-mediated lympholysis (CML). These CD8-positive cells are distinct from NATURAL KILLER CELLS and NATURAL KILLER T-CELLS. There are two effector phenotypes: TC1 and TC2. Cell-Mediated Lympholytic Cells,Cytotoxic T Cells,Cytotoxic T Lymphocyte,Cytotoxic T-Lymphocytes,TC1 Cell,TC1 Cells,TC2 Cell,TC2 Cells,Cell Mediated Lympholytic Cells,Cell, Cell-Mediated Lympholytic,Cell, TC1,Cell, TC2,Cell-Mediated Lympholytic Cell,Cytotoxic T Cell,Cytotoxic T Lymphocytes,Cytotoxic T-Lymphocyte,Lymphocyte, Cytotoxic T,Lympholytic Cell, Cell-Mediated,Lympholytic Cells, Cell-Mediated,T Cell, Cytotoxic,T Lymphocyte, Cytotoxic,T Lymphocytes, Cytotoxic,T-Lymphocyte, Cytotoxic
D015850 Interleukin-6 A cytokine that stimulates the growth and differentiation of B-LYMPHOCYTES and is also a growth factor for HYBRIDOMAS and plasmacytomas. It is produced by many different cells including T-LYMPHOCYTES; MONOCYTES; and FIBROBLASTS. Hepatocyte-Stimulating Factor,Hybridoma Growth Factor,IL-6,MGI-2,Myeloid Differentiation-Inducing Protein,Plasmacytoma Growth Factor,B Cell Stimulatory Factor-2,B-Cell Differentiation Factor,B-Cell Differentiation Factor-2,B-Cell Stimulatory Factor 2,B-Cell Stimulatory Factor-2,BSF-2,Differentiation Factor, B-Cell,Differentiation Factor-2, B-Cell,IFN-beta 2,IL6,Interferon beta-2,B Cell Differentiation Factor,B Cell Differentiation Factor 2,B Cell Stimulatory Factor 2,Differentiation Factor 2, B Cell,Differentiation Factor, B Cell,Differentiation-Inducing Protein, Myeloid,Growth Factor, Hybridoma,Growth Factor, Plasmacytoma,Hepatocyte Stimulating Factor,Interferon beta 2,Interleukin 6,Myeloid Differentiation Inducing Protein,beta-2, Interferon
D016207 Cytokines Non-antibody proteins secreted by inflammatory leukocytes and some non-leukocytic cells, that act as intercellular mediators. They differ from classical hormones in that they are produced by a number of tissue or cell types rather than by specialized glands. They generally act locally in a paracrine or autocrine rather than endocrine manner. Cytokine
D051379 Mice The common name for the genus Mus. Mice, House,Mus,Mus musculus,Mice, Laboratory,Mouse,Mouse, House,Mouse, Laboratory,Mouse, Swiss,Mus domesticus,Mus musculus domesticus,Swiss Mice,House Mice,House Mouse,Laboratory Mice,Laboratory Mouse,Mice, Swiss,Swiss Mouse,domesticus, Mus musculus

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