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Critical role for DNA vaccination frequency in induction of antigen-specific cytotoxic responses

机译:DNA疫苗接种频率在诱导抗原特异性细胞毒性反应中的关键作用

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Since antigen-persistence plays a role for induction of immunity, we investigated the in vivo pharmacokinetic of a naked DNA vaccine at the site of its action, i.e., in the lymph node. After direct intralymphatic injection, naked DNA vaccine degraded within a few hours. In correlation with the short persistence of the DNA vaccine we found that the frequency of vaccination critically influenced the strength of the immune response. In mice vaccinated every 3 days, cytotoxic T-cell responses were enhanced compared to immunization in 6 or 9 days intervals. The results suggest that the so far disappointing efficiency of naked DNA vaccines in humans may be overcome by more frequent vaccination.
机译:由于抗原的持久性在诱导免疫中起作用,因此我们研究了裸DNA疫苗在其作用部位,即在淋巴结中的体内药代动力学。直接淋巴内注射后,裸露的DNA疫苗在数小时内降解。与DNA疫苗的持续时间短有关,我们发现疫苗接种的频率严重影响了免疫反应的强度。每隔3天接种一次的小鼠中,与间隔6或9天进行免疫接种相比,细胞毒性T细胞应答得到了增强。结果表明,通过更频繁的疫苗接种,可以克服迄今为止裸DNA疫苗在人类中令人失望的效率。

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