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M9550065.TXT
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1995-03-04
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Document 0065
DOCN M9550065
TI Immunization with irradiated Plasmodium berghei sporozoites induces IL-2
and IFN gamma but not IL-4.
DT 9505
AU White KL; Jarboe DL; Krzych U; Department of Biology, Catholic
University of America,; Washington, DC 20064.
SO Parasite Immunol. 1994 Sep;16(9):479-91. Unique Identifier : AIDSLINE
MED/95140494
AB Protective immunity against Plasmodium induced by immunization with
irradiated sporozoites (SPZ) depends on both humoral and cellular
responses. Although circumsporozoite protein (CSP)-specific cytolytic T
lymphocyte responses have been established as an effector system, other
cell types are required for protection. We have previously demonstrated
that although protective immunity and T cell proliferative reactivity to
SPZ are mouse strain- and SPZ dose-dependent, no correlation between the
two responses could be found. Since protective immunity involves
functionally diverse T cell subsets, we asked whether the discordance
between proliferative responses to SPZ and protective immunity might
have resulted from selective activation of either the Th1 or Th2 cell
subset. Protective immunity, in vitro proliferative responses, and
lymphokine production were tested in BALB/c, C57Bl/6, and C3H/HeN mice
immunized according to different SPZ regimens. The levels of IL-2
paralleled the proliferative reactivities in each mouse strain examined.
Although IFN gamma levels were present in the unprimed lymphocyte
cultures, they increased following each SPZ immunization, in C57Bl/6,
moderate in C3H/HeN, and lowest in BALB/c splenic cultures.
Surprisingly, no IL-4 was detected in splenic cultures from any mouse
strain during proliferative activity or protective immunity. In
contrast, elevated IL-6 production was noted after each immunization,
regardless of the protective status and it correlated with anti-CSP IgG
serum levels. These data establish that lymphokine profiles
corresponding primarily to the Th1 cells were induced by immunization
with P. berghei SPZ and that IL-4 secreting T cells were not induced by
the SPZ-stage berghei antigens.
DE Animal Antibodies, Protozoan/ANALYSIS Cells, Cultured Female
Immunization Interferon Type II/*BIOSYNTHESIS
Interleukin-2/*BIOSYNTHESIS Interleukin-4/*BIOSYNTHESIS Lymphocyte
Transformation Malaria/IMMUNOLOGY/*PREVENTION & CONTROL Mice Mice,
Inbred BALB C Mice, Inbred C3H Mice, Inbred C57BL Plasmodium
berghei/*IMMUNOLOGY/RADIATION EFFECTS RNA, Messenger/ANALYSIS Th1
Cells/*IMMUNOLOGY Th2 Cells/IMMUNOLOGY JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).