Dimethyl 2,2-dichlorovinyl phosphate (DDVP) markedly inhibits activities of natural killer cells, cytotoxic T lymphocytes and lymphokine-activated killer cells via the Fas-ligand/Fas pathway in perforin-knockout (PKO) mice

Qing Li, Ari Nakadai, Kazuyoshi Takeda, Tomoyuki Kawada

研究成果: Article査読

31 被引用数 (Scopus)

抄録

Natural killer (NK), lymphokine-activated killer (LAK) and cytotoxic T lymphocyte (CTL) cells induce target cell death by two main mechanisms, the perforin/granzyme pathway and the Fas-ligand (FasL)/Fas pathway. We have previously found that organophosphorus pesticides significantly inhibit human and murine NK, LAK and CTL activities and that this inhibition is partially mediated by the inhibition of granzymes. We asked here whether organophosphorus pesticides also affect the FasL/Fas pathway by using perforin-knockout (PKO) mice. Thus, we examined the effect that dimethyl 2,2-dichlorovinyl phosphate (DDVP), an organophosphorus pesticide has on NK, CTL and LAK activities of PKO mice in vitro using the Fas antigen-positive YAC-1 cell as a target in the present study. We found that DDVP significantly decreased NK, CTL and LAK activities in a dose-dependent manner, and that the CTL and LAK activities of PKO mice were significantly blocked by anti-FasL antibody, suggesting that DDVP and anti-FasL antibody have the same/similar mechanism of inhibiting LAK and CTL activities. We further found that DDVP decreases the expression of Fas antigen on YAC-1 cells, and the expression of FasL on LAK cells in a dose-dependent manner, respectively. Taken together, these findings indicate that the DDVP-induced inhibition of NK, LAK and CTL activities in PKO mice is mediated by the impairment of the FasL/Fas pathway.

本文言語English
ページ(範囲)41-50
ページ数10
ジャーナルToxicology
204
1
DOI
出版ステータスPublished - 2004 11 1

ASJC Scopus subject areas

  • 毒物学

フィンガープリント

「Dimethyl 2,2-dichlorovinyl phosphate (DDVP) markedly inhibits activities of natural killer cells, cytotoxic T lymphocytes and lymphokine-activated killer cells via the Fas-ligand/Fas pathway in perforin-knockout (PKO) mice」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

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