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DNA immunisation: altering the cellular localisation of expressed protein and the immunisation route allows manipulation of the immune response

机译:DNA免疫:改变表达蛋白质的细胞定位,免疫途径可以控制免疫反应

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DNA immunisation by intramuscular (IM) injection induces Th1 responses, whereas gene gun (GG)immunisation into the skin stimulates Th2 responses. Three ovalbumin (OVA) cDNA constructs, in which OVA is cytoplasmic (CYT), secreted (SECR), or transmembrane (TM), were compared in immunisation studies using intramuscular injection or biolistic bombardment of the skin. Gene gun immunisation with OVA-CYT or OVA-TM led to strong OVA-specific CTL responses, but not following OVA-SECR immunisation. In contrast, intramuscular immunisation with OVA-SECR or OVA-TM led to potent CTL while immunisation with OVA-CYT was ineffective. OVA-specific antibodies were detected following gene gun immunisation with all three constructs, whereas only the OVA-SECR construct induced antibody production following intramuscular immunisation. These results demonstrate the capacity to manipulate the nature of the immune response by altering the cellular localization of expressed proteins and the route of DNA immunisation
机译:通过肌内(IM)注射进行的DNA免疫诱导Th1反应,而通过基因枪(GG)进行皮肤免疫则刺激Th2反应。在使用肌肉内注射或生物弹轰击皮肤的免疫研究中,比较了三种卵清蛋白(OVA)cDNA构建体,其中OVA是细胞质(CYT),分泌(SECR)或跨膜(TM)。用OVA-CYT或OVA-TM进行基因枪免疫可产生强烈的OVA特异性CTL反应,但在OVA-SECR免疫后却没有。相反,用OVA-SECR或OVA-TM进行的肌肉内免疫导致有效的CTL,而用OVA-CYT的免疫无效。在用所有三种构建体进行基因枪免疫后,检测到OVA特异性抗体,而在肌肉内免疫后,只有OVA-SECR构建体诱导抗体产生。这些结果证明了通过改变表达蛋白的细胞定位和DNA免疫途径来控制免疫反应性质的能力。

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