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- W2000936119 abstract "N -Acetyl- d -glucosamine-coated polyamidoamine dendrimer (GlcNAc 8 ) was shown previously to exhibit binding affinity to the rat recombinant NKR-P1 molecule (known in mice also as NK1.1) and to induce NK cell-mediated cytotoxicity. In this study, we investigated whether GlcNAc 8 modulates antibody formation as activated NK cells were reported to participate in its regulation. C57BL/6 mice treated with GlcNAc 8 and intact controls were immunized either with sheep red blood cells (SRBCs), 2,4-dinitrophenylated-lipopolysaccharide (DNP-LPS) or keyhole limpet hemocyanin (KLH) for evaluation of splenic antibody forming cell counts and serum immunoglobulin (Ig) levels. In vitro Ig formation was determined using supernatants of spleen mononuclear cells (SMCs) and CD49b or NK1.1-depleted SMC subpopulations. Serum antigen-specific IgG2a levels were also measured in DBA/2 and BALB/c mice (NK1.1-negative mouse strains on the basis of flow cytometric analysis) which possess different Nkr-p1c gene form than C57BL/6 ones. A significant increase in anti-SRBC IgG forming cells, serum levels of anti-KLH as well as anti-DNP IgG and IgG2a was observed after GlcNAc 8 administration in C57BL/6 mice. IgM levels in supernatants of SMCs stimulated in vitro simultaneously with DNP-LPS and GlcNAc 8 were significantly mounted compared with supernatants of SMCs primed with the antigen alone, but this enhancement was blocked after depletion of CD49b-positive or NK1.1-positive cells. In DBA/2 and BALB/c mice, GlcNAc 8 influenced neither serum levels of anti-KLH nor anti-DNP IgG2a. These results indicate that GlcNAc 8 -induced upregulation of antibody formation is triggered by NK cell stimulation and depends on expressed NKR-P1 isoforms, particularly NKR-P1C." @default.
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- W2000936119 date "2009-06-01" @default.
- W2000936119 modified "2023-10-17" @default.
- W2000936119 title "N-Acetyl-D-glucosamine-coated polyamidoamine dendrimer modulates antibody formation via natural killer cell activation" @default.
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- W2000936119 doi "https://doi.org/10.1016/j.intimp.2009.03.007" @default.
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