The overall goal of the proposed research is to investigate the biology of T lymphocytes activated by murine plasmodia with the aim of understanding how these cells participate in protective immune response during malaria. In particular, attention will be focused on antibody-independent cell mediated protective immune responses leading to parasite death or growth inhibition. Antigen-specific protective T-cell clones including CTR2.1 and others to be developed against P. chabaudi adami as well as against P. vinckei petteri and B. microti utilizing in vitro culture techniques will be tested for their protective activity in vivo against homologous and heterologous parasites by means of adoptive transfer into histocompatible nude mice. Protective and nonprotective T-cell clones will be characterized according to surface antigens, lymphokine production, antigenic specificity, and trafficking in an effort to identify characteristics distinctive of protective cloned T cells. In addition, experiments will be undertaken to characterize the biological function of protective T-cell clones both in vitro and in vivo in order to determine whether they kill parasites through the release of specific mediators or activate additional cell types in a common pathway of resistance. Efforts will also be made to determine whether the function of malaria- protective cloned T cells can be modulated by T cells displaying antigen-specific suppressive activity.

Agency
National Institute of Health (NIH)
Institute
National Institute of Allergy and Infectious Diseases (NIAID)
Type
Research Project (R01)
Project #
2R01AI012710-13
Application #
3125255
Study Section
Bacteriology and Mycology Subcommittee 1 (BM)
Project Start
1975-06-01
Project End
1993-08-31
Budget Start
1988-09-01
Budget End
1989-08-31
Support Year
13
Fiscal Year
1988
Total Cost
Indirect Cost
Name
Hahnemann University
Department
Type
Schools of Medicine
DUNS #
City
Philadelphia
State
PA
Country
United States
Zip Code
19129
Weidanz, W P; Lafleur, G; Kita-Yarbro, A et al. (2011) Signalling through the IL-2 receptor ?(c) peptide (CD132) is essential for the expression of immunity to Plasmodium chabaudi adami blood-stage malaria. Parasite Immunol 33:512-6
Weidanz, William P; LaFleur, GayeLyn; Brown, Andrew et al. (2010) Gammadelta T cells but not NK cells are essential for cell-mediated immunity against Plasmodium chabaudi malaria. Infect Immun 78:4331-40
Lynch, Michelle M; Cernetich-Ott, Amy; Weidanz, William P et al. (2009) Prediction of merozoite surface protein 1 and apical membrane antigen 1 vaccine efficacies against Plasmodium chabaudi malaria based on prechallenge antibody responses. Clin Vaccine Immunol 16:293-302
van der Heyde, Henri C; Burns, James M; Weidanz, William P et al. (2007) Analysis of antigen-specific antibodies and their isotypes in experimental malaria. Cytometry A 71:242-50
van der Heyde, Henri C; Batchelder, Joan M; Sandor, Matyas et al. (2006) Splenic gammadelta T cells regulated by CD4+ T cells are required to control chronic Plasmodium chabaudi malaria in the B-cell-deficient mouse. Infect Immun 74:2717-25
Weidanz, William P; Batchelder, Joan M; Flaherty, P et al. (2005) Plasmodium chabaudi adami: use of the B-cell-deficient mouse to define possible mechanisms modulating parasitemia of chronic malaria. Exp Parasitol 111:97-104
Rummel, Thomas; Batchelder, Joan; Flaherty, Patrick et al. (2004) CD28 costimulation is required for the expression of T-cell-dependent cell-mediated immunity against blood-stage Plasmodium chabaudi malaria parasites. Infect Immun 72:5768-74
Gillman, Brad M; Batchelder, Joan; Flaherty, Patrick et al. (2004) Suppression of Plasmodium chabaudi parasitemia is independent of the action of reactive oxygen intermediates and/or nitric oxide. Infect Immun 72:6359-66
Cigel, Francine; Batchelder, Joan; Burns Jr, James M et al. (2003) Immunity to blood-stage murine malarial parasites is MHC class II dependent. Immunol Lett 89:243-9
Batchelder, Joan M; Burns Jr, James M; Cigel, Francine K et al. (2003) Plasmodium chabaudi adami: interferon-gamma but not IL-2 is essential for the expression of cell-mediated immunity against blood-stage parasites in mice. Exp Parasitol 105:159-66

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