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1996-03-30
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Document 0929
DOCN M9650929
TI Roles for both CD4+ and CD8+ T cells in protective immunity against
Onchocerca lienalis microfilariae in the mouse.
DT 9505
AU Folkard SG; Bianco AE; Liverpool School of Tropical Medicine, UK.
SO Parasite Immunol. 1995 Oct;17(10):541-53. Unique Identifier : AIDSLINE
MED/96164309
AB Mice inoculated with microfilariae of the filarial nematode Onchocerca
lienalis clear their parasites from the skin over a period of 3 to 4
months and are highly resistant to a challenge infection. The adoptive
transfer of spleen cells at various time points following primary and
secondary infections of mice shows that exposures of 50 days or greater
are required for the generation of lymphocytes capable of transferring
protection to naive recipients. This adoptive transfer of protection
with spleen cells from infection-primed mice partitions with the T
lymphocyte population. In contrast, the passive transfer of protection
with spleen-derived B cells, or sera taken at various time points
following infection was not achieved. Moreover, there was no detectable
synergistic effect when B and T cells were co-administered to recipient
animals. Depletion of CD4+ and CD8+ T cells with monoclonal antibodies
shows that CD8+ T cells have some regulatory effect on parasite
establishment early in primary infection, but this is later superseded
by CD4+ T cell reactivity that is predominant both when primary
infection microfilariae are cleared and also during resistance to
reinfection. Measurement of cytokines in the sera of mice undergoing
primary and secondary infections support a microfilariae-induced Th2
activity, with high levels of IL-5 that are sustained upon reinfection,
and low levels of IFN-gamma that are negligible at the time when mice
are most strongly immune.
DE Animal Antibodies, Monoclonal Antilymphocyte Serum
B-Lymphocytes/IMMUNOLOGY CD4-Positive T-Lymphocytes/*IMMUNOLOGY
CD8-Positive T-Lymphocytes/*IMMUNOLOGY Immunotherapy, Adoptive
Interferon Type II/BLOOD Interleukin-4/BLOOD Interleukin-5/BLOOD Male
Mice Mice, Inbred BALB C Mice, Inbred CBA Microfilaria/IMMUNOLOGY
Onchocerca/*IMMUNOLOGY Onchocerciasis/*IMMUNOLOGY Spleen/IMMUNOLOGY
Support, Non-U.S. Gov't Time Factors JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).