The three major goals of this proposal are: 1) to determine the regions of the infuenza virus (A/PR/8/34) hemagglutinin (HA) molecule which serve as target structures for anti-viral B- and T-cells. With respect to the HA-structures seen by antibodies, the previously constructed antigenic map will be refined and expanded by antibody-mediated selection and antigenic and structural characterization of some additional PR8 virus mutants and by generation and subsequent mapping of anti-HA2 antibodies. The HA-structures involved in stimulation of helper T (TH) cells will be provisionally characterized by examination of antibody-selected PR8 virus mutants, or of enzymatic HA cleavage products, for ability to stimulate TH hybridomas. The determinants will then be defined precisely by production and analysis of synthetic peptides. An attempt will be made also to characterize HA-structures involved in the formation of the target antigen(s) recognized by cytotoxic (CTL) cells. This may be achieved by selection of PR8 mutants in the presence of CTL clones and subsequent antigenic and structural characterization of these virus mutants. 2) The function of longterm anti-viral TH clones, specific for HA or internal viral proteins, will be examined with respect to extent of help for anti-viral B cell responses to HA and internal viral proteins. These comparative analyses will be done in vitro and in vivo in an adoptive transfer system. 3) The relevance of the HA (as target structure for regulatory and effector immune mechanisms) in protection against influenza virus infection will be investigated in a murine model system. This will be done by comparing degree of protection and immune response in PR8 immune mice upon challenge with various reassortant viruses that differ from PR8 only with regard to the HA. The longterm goals are 1) to define the role of distinct regions of the HA as target structures for immune effector cells and as nominal antigen structures for regulatory T cells and 2) to assess how precisely changes in various regions of the HA affect the interaction between influenza virus and immune system of the host.

Agency
National Institute of Health (NIH)
Institute
National Institute of Allergy and Infectious Diseases (NIAID)
Type
Research Project (R01)
Project #
5R01AI013989-10
Application #
3125602
Study Section
Allergy and Immunology Study Section (ALY)
Project Start
1977-04-01
Project End
1989-03-31
Budget Start
1986-04-01
Budget End
1987-03-31
Support Year
10
Fiscal Year
1986
Total Cost
Indirect Cost
Name
Wistar Institute
Department
Type
DUNS #
042250712
City
Philadelphia
State
PA
Country
United States
Zip Code
19104
Mozdzanowska, Krystyna; Feng, Jingqi; Eid, Mark et al. (2006) Enhancement of neutralizing activity of influenza virus-specific antibodies by serum components. Virology 352:418-26
Zharikova, Darya; Mozdzanowska, Krystyna; Feng, Jingqi et al. (2005) Influenza type A virus escape mutants emerge in vivo in the presence of antibodies to the ectodomain of matrix protein 2. J Virol 79:6644-54
Mozdzanowska, Krystyna; Furchner, Michelle; Zharikova, Darya et al. (2005) Roles of CD4+ T-cell-independent and -dependent antibody responses in the control of influenza virus infection: evidence for noncognate CD4+ T-cell activities that enhance the therapeutic activity of antiviral antibodies. J Virol 79:5943-51
Mozdzanowska, Krystyna; Feng, JinQi; Eid, Mark et al. (2003) Induction of influenza type A virus-specific resistance by immunization of mice with a synthetic multiple antigenic peptide vaccine that contains ectodomains of matrix protein 2. Vaccine 21:2616-26
Feng, Jing Qi; Mozdzanowska, Krystyna; Gerhard, Walter (2002) Complement component C1q enhances the biological activity of influenza virus hemagglutinin-specific antibodies depending on their fine antigen specificity and heavy-chain isotype. J Virol 76:1369-78
Mozdzanowska, K; Maiese, K; Gerhard, W (2000) Th cell-deficient mice control influenza virus infection more effectively than Th- and B cell-deficient mice: evidence for a Th-independent contribution by B cells to virus clearance. J Immunol 164:2635-43
Mozdzanowska, K; Maiese, K; Furchner, M et al. (1999) Treatment of influenza virus-infected SCID mice with nonneutralizing antibodies specific for the transmembrane proteins matrix 2 and neuraminidase reduces the pulmonary virus titer but fails to clear the infection. Virology 254:138-46
Mozdzanowska, K; Furchner, M; Washko, G et al. (1997) A pulmonary influenza virus infection in SCID mice can be cured by treatment with hemagglutinin-specific antibodies that display very low virus-neutralizing activity in vitro. J Virol 71:4347-55
Mozdzanowska, K; Furchner, M; Maiese, K et al. (1997) CD4+ T cells are ineffective in clearing a pulmonary infection with influenza type A virus in the absence of B cells. Virology 239:217-25
Gerhard, W; Mozdzanowska, K; Furchner, M et al. (1997) Role of the B-cell response in recovery of mice from primary influenza virus infection. Immunol Rev 159:95-103

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