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Human gamma interferon production by cytotoxic T lymphocytes sensitized during hepatitis A virus infection. 1988

K Maier, and P Gabriel, and E Koscielniak, and Y D Stierhof, and K H Wiedmann, and B Flehmig, and A Vallbracht
Department of Medical Virology, University of Tübingen, Federal Republic of Germany.

The production of interferon (IFN) during a chromium-51 release assay with hepatitis A virus (HAV)-infected fibroblasts and autologous peripheral blood lymphocytes from patients with acute HAV infection was studied to determine whether IFN plays a role in immunopathogenesis of hepatitis A infection in humans. Skin fibroblasts of eight patients after acute HAV infection and from two control persons without history of current or past HAV infection were infected with HAV. Peripheral blood lymphocytes were collected at different times after the onset of icterus and tested in a chromium-51 release assay against autologous HAV-infected skin fibroblasts for their cytolytic and IFN-producing activity. The IFN produced during the assay was characterized and found to have the properties of human gamma IFN. Cytotoxicity and gamma IFN release were virus specific. The cell types responsible for both functions were characterized and found to be in the HLA-dependent T8+ lymphocyte subset. Considering that gamma IFN has an antiviral effect on persistent HAV infection in vitro and that it probably accounts for stimulation of HLA class I antigen expression on hepatocytes, our experimental results presented here demonstrate that human gamma IFN produced by HAV-specific T cells may participate in pathogenesis of hepatitis A infection in humans.

UI MeSH Term Description Entries
D007371 Interferon-gamma The major interferon produced by mitogenically or antigenically stimulated LYMPHOCYTES. It is structurally different from TYPE I INTERFERON and its major activity is immunoregulation. It has been implicated in the expression of CLASS II HISTOCOMPATIBILITY ANTIGENS in cells that do not normally produce them, leading to AUTOIMMUNE DISEASES. Interferon Type II,Interferon, Immune,gamma-Interferon,Interferon, gamma,Type II Interferon,Immune Interferon,Interferon, Type II
D007700 Kinetics The rate dynamics in chemical or physical systems.
D002478 Cells, Cultured Cells propagated in vitro in special media conducive to their growth. Cultured cells are used to study developmental, morphologic, metabolic, physiologic, and genetic processes, among others. Cultured Cells,Cell, Cultured,Cultured Cell
D005347 Fibroblasts Connective tissue cells which secrete an extracellular matrix rich in collagen and other macromolecules. Fibroblast
D006506 Hepatitis A INFLAMMATION of the LIVER in humans caused by a member of the HEPATOVIRUS genus, HUMAN HEPATITIS A VIRUS. It can be transmitted through fecal contamination of food or water. Hepatitis, Infectious,Infectious Hepatitis,Hepatitides, Infectious,Infectious Hepatitides
D006507 Hepatovirus A genus of PICORNAVIRIDAE causing infectious hepatitis naturally in humans and experimentally in other primates. It is transmitted through fecal contamination of food or water. HEPATITIS A VIRUS is the type species. Hepatitis Virus, Infectious,Infectious Hepatitis Virus,Hepatitis Viruses, Infectious,Hepatoviruses,Infectious Hepatitis Viruses
D006680 HLA Antigens Antigens determined by leukocyte loci found on chromosome 6, the major histocompatibility loci in humans. They are polypeptides or glycoproteins found on most nucleated cells and platelets, determine tissue types for transplantation, and are associated with certain diseases. Human Leukocyte Antigen,Human Leukocyte Antigens,Leukocyte Antigens,HL-A Antigens,Antigen, Human Leukocyte,Antigens, HL-A,Antigens, HLA,Antigens, Human Leukocyte,Antigens, Leukocyte,HL A Antigens,Leukocyte Antigen, Human,Leukocyte Antigens, Human
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D012867 Skin The outer covering of the body that protects it from the environment. It is composed of the DERMIS and the EPIDERMIS.
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

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