Cytokine responses in mice infected with Angiostrongylus cantonensis - PubMed (original) (raw)
Comparative Study
Cytokine responses in mice infected with Angiostrongylus cantonensis
H Sugaya et al. Parasitol Res. 1997.
Abstract
For determination of the kinetics of cytokine production and its possible role in host resistance to Angiostrongylus cantonensis in the mouse, Th1 [interleukin 2 (IL-2) and interferon gamma (IFN-gamma] and Th2 (IL-5 and IL-4) cytokine production in the cerebrospinal fluid (CSF), sera, and culture supernatants of spleen cells (SC) or cervical lymph-node cells (CLNC) of infected BALB/c and C57BL/6 mice was assessed by a sandwich enzyme-linked immunosorbent assay (ELISA). IL-5 and IL-4 were detected in CSF of both strains, with a peak response occurring at around days 12-15 and 20 postinfection (p.i.), respectively. A reverse transcriptase-polymerase chain reaction (RT-PCR) assay also revealed prominent IL-5 and IL-4 mRNA expression in T-cells but not in eosinophils in CSF. SC and CLNC stimulated with A. cantonensis young adult-worm antigen released IL-5 in vitro at and after day 20 p.i. Contrarily, IFN-gamma production in CSF and SC or CLNC culture supernatants was almost negligible before day 30 p.i. IL-5, IL-4, and IL-2 production in culture supernatants was rather prominent in resistant C57BL/6 mice as opposed to susceptible BALB/c mice as assessed by the magnitude of increase over preinfection levels. Antigen-specific IgG1 (but not IgG2a) responses were more prominent in C57BL/6 mice than in BALB/c mice. These data suggest that systemic and local Th2 cytokine responses, especially those involving IL-5, are predominant in A. cantonensis-infected mice and that IL-5 is an important cytokine underlying the innate resistance of the mouse against A. cantonensis.
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