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1996-03-04
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Document 0622
DOCN M9640622
TI Resolution of cryptosporidial infection in mice correlates with
parasite-specific lymphocyte proliferation associated with both Th1 and
Th2 cytokine secretion.
DT 9604
AU Tilley M; McDonald V; Bancroft GJ; London School of Hygiene and Tropical
Medicine, Department of; Clinical Sciences, UK.
SO Parasite Immunol. 1995 Sep;17(9):459-64. Unique Identifier : AIDSLINE
MED/96143612
AB This study was designed to investigate and characterize T-cell responses
which lead to elimination of a primary infection of Cryptosporidium
muris in BALB/c mice. The proliferative response of spleen cells to
parasite antigen was measured by uptake of 3H-thymidine and, in
parallel, supernatants were removed from cells to measure levels of
IFN-gamma, TNF, IL-2 and IL-4 by ELISA. Oocyst excretion in faeces was
first detected on day 10 post infection (p.i.); the level of shedding
subsequently increased until day 14 and then declined until no oocysts
were detected by day 25. The proliferative response of spleen cells from
infected animals was similar to control levels up to day 14 p.i. but
increased significantly on day 21 and was even greater on day 26.
IFN-gamma and IL-2 were detected initially on day 14 p.i. and
significantly higher concentrations were found on days 21 and 26. IL-4
secretion was also detected, but not until day 21 p.i., and production
of TNF was not found at any time. Depletion of T-cells or CD4+ cells
from spleen cells cultured with antigen resulted in a significant
decrease in the levels of cytokine detected. These results indicated,
therefore, that in BALB/c mice there was a correlation between the
development of immunity to C. muris infection and both a parasite
antigen-specific proliferative response and Th1 and Th2 cytokine
production by spleen cells.
DE Animal Cryptosporidiosis/*IMMUNOLOGY Cryptosporidium/IMMUNOLOGY
Cytokines/*SECRETION Interferon Type II/SECRETION
Interleukin-2/SECRETION Interleukin-4/SECRETION *Lymphocyte
Transformation Mice Mice, Inbred BALB C Support, Non-U.S. Gov't Th1
Cells/*IMMUNOLOGY Th2 Cells/*IMMUNOLOGY Tumor Necrosis
Factor/SECRETION JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).