Inhibition of murine dendritic cell activation by synthetic phosphorothioate oligodeoxynucleotides-猫眼课题宝

合成硫代磷酸寡脱氧核苷酸抑制鼠树突状细胞活化

DOI：

发表时间：

2002

期刊：

Journal of Leukocyte Biology

影响因子：

5.5

通讯作者：

中科院分区：

医学3区

文献类型：

作者：

F. Zhu;C. Reich;D. Pisetsky

Depending on sequence and backbone structure, DNA can inhibit as well as stimulate immune responses. As previously shown, single‐base phosphorothioate (Ps) oligodeoxynucleotides (ODN) can inhibit murine macrophage activation. To determine whether these compounds can also affect dendritic cells (DC), the effects of 30‐mer Ps ODN (SdA, SdT, SdG, and SdC) on DC activation were assessed in an in vitro system. With DC preparations obtained from murine bone marrow cultured in granulocyte macrophage‐colony stimulating factor, the Ps ODN blocked the production of interleukin‐12 and nitric oxide induced by bacterial DNA, an immunostimulatory cytosine phosphate guanosine dinucleotide (CpG) ODN and lipopolysaccharide (LPS). Furthermore, these compounds inhibited up‐regulation of costimulatory molecules CD40 and CD86 as well as major histocompatibility complex‐II molecules, indicating an effect on DC maturation. Although the Ps ODN limited uptake of CpG ODN as assessed by flow cytometry, the Ps ODN did not affect LPS uptake, suggesting that these compounds inhibit DC responses by effects on downstream signaling pathways. Together, these observations extend the range of action of inhibitory ODN to DC and suggest a role of these compounds as immunomodulatory agents.