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Role of T cell subpopulations in mice infected with Angiostrongylus cantonensis

Published online by Cambridge University Press:  05 June 2009

J.D. Lee ,
J.J. Wang ,
J.H. Chang ,
L.Y. Chung ,
E.R. Chen  and
C.M. Yen
J.D. Lee
Affiliation:
Department of Parasitology, Kaohsiung Medical College, Kaohsiung, Taiwan, Republic of China
J.J. Wang
Affiliation:
Department of Parasitology, Kaohsiung Medical College, Kaohsiung, Taiwan, Republic of China
J.H. Chang
Affiliation:
Department of Parasitology, Medical College, Cheng Kung University, Tainan, Taiwan, Republic of China
L.Y. Chung
Affiliation:
Department of Parasitology, Kaohsiung Medical College, Kaohsiung, Taiwan, Republic of China
E.R. Chen
Affiliation:
Department of Parasitology, Kaohsiung Medical College, Kaohsiung, Taiwan, Republic of China
C.M. Yen*
Affiliation:
Department of Parasitology, Kaohsiung Medical College, Kaohsiung, Taiwan, Republic of China
*
* Author for correspondence.
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Abstract

When C57BL/6 mice were infected with Angiostrongylus cantonensis, the percentage of T helper (CD4+) cells and T supressor (CD8+) cells in peripheral blood increased weekly until the third and seventh week respectively, and then gradually decreased. C57BL/6 mice were depleted of CD4+ and CD8+ T cells by in vivo injection of anti-CD4 and anti-CD8 monoclonal antibodies, respectively, and then infected with A. cantonensis. There were significantly more and less worms recovered in the mice depleted of CD4+ and CD8+ T cells respectively than in undepleted mice. Discrete subpopulations of T cells from mice exposed to A. cantonensis for 3 weeks or 7 weeks were adoptively transferred to syngeneic recipients which were then given a challenge infection. Protection was mediated by a CD4+ T cell population present in mice after 3 weeks of infection but was not demonstrable with cells taken 7 weeks after infection. When CD4+ T cells obtained from 3-week infected mice were mixed with 5% CD8+ T cells obtained from mice infected for 7 weeks, no significant transfer of resistance was observed. Thus, immune responses to A. cantonensis in mice were regulated by discrete subpopulations of T lymphocytes.

Type
Research Papers
Information
Journal of Helminthology , Volume 70 , Issue 3 , September 1996 , pp. 211 - 214
Copyright
Copyright © Cambridge University Press 1996

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