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Journal Article
Research Support, Non-U.S. Gov't
Modulation of natural killer cell cytotoxicity and cytokine release by the drug glatiramer acetate.
Cellular and Molecular Life Sciences : CMLS 2009 April
Glatiramer acetate (GA or Copaxone) is a drug used to treat experimental autoimmune encephalomyelitis in mice and multiple sclerosis in human. Here, we describe a new mechanism of action for this drug. GA enhanced the cytolysis of human NK cells against autologous and allogeneic immature and mature monocyte-derived dendritic cells (DCs). This drug reduced the percentages of mature DCs expressing CD80, CD83, HLA-DR or HLA-I. In contrast, it did not modulate the percentages of NK cells expressing NKG2D, NKp30, or NKp44. Nonetheless, anti-NKp30 or anti-CD86 inhibited GA-enhanced human NK cell lysis of immature DCs. Hence, CD86, and NKp30 are important for NK cell lysis of immature DCs, whereas CD80, CD83, HLA-DR and HLA-I are important for the lysis of mature DCs when GA is used as a stimulus. Further, GA inhibited the release of IFN-gamma 24 h but increased the release of TNF-alpha 48 h after incubation with NK cells.
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