Division of Drug Delivery Technology, Cluster BioTherapeutics, Leiden Academic Centre for Drug Research, Leiden University, Leiden, The Netherlands.
Division of Drug Delivery Technology, Cluster BioTherapeutics, Leiden Academic Centre for Drug Research, Leiden University, Leiden, The Netherlands; Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Ain Shams University, Cairo, Egypt.
J Control Release. 2017 Nov 28;266:109-118. doi: 10.1016/j.jconrel.2017.09.021. Epub 2017 Sep 21.
In this study, we investigated the potential of intradermal delivery of nanoparticulate vaccines to modulate the immune response of protein antigen using hollow microneedles. Four types of nanoparticles covering a broad range of physiochemical parameters, namely poly (lactic-co-glycolic) (PLGA) nanoparticles, liposomes, mesoporous silica nanoparticles (MSNs) and gelatin nanoparticles (GNPs) were compared. The developed nanoparticles were loaded with a model antigen (ovalbumin (OVA)) with and without an adjuvant (poly(I:C)), followed by the characterization of size, zeta potential, morphology, and loading and release of antigen and adjuvant. An in-house developed hollow-microneedle applicator was used to inject nanoparticle suspensions precisely into murine skin at a depth of about 120μm. OVA/poly(I:C)-loaded nanoparticles and OVA/poly(I:C) solution elicited similarly strong total IgG and IgG1 responses. However, the co-encapsulation of OVA and poly(I:C) in nanoparticles significantly increased the IgG2a response compared to OVA/poly(I:C) solution. PLGA nanoparticles and liposomes induced stronger IgG2a responses than MSNs and GNPs, correlating with sustained release of the antigen and adjuvant and a smaller nanoparticle size. When examining cellular responses, the highest CD8 and CD4 T cell responses were induced by OVA/poly(I:C)-loaded liposomes. In conclusion, the applicator controlled hollow microneedle delivery is an excellent method for intradermal injection of nanoparticle vaccines, allowing selection of optimal nanoparticle formulations for humoral and cellular immune responses.
在这项研究中,我们使用空心微针研究了皮内递送纳米颗粒疫苗以调节蛋白质抗原免疫反应的潜力。比较了涵盖广泛物理化学参数的四种类型的纳米颗粒,即聚(乳酸-共-乙醇酸)(PLGA)纳米颗粒、脂质体、介孔硅纳米颗粒(MSNs)和明胶纳米颗粒(GNPs)。开发的纳米颗粒负载有模型抗原(卵清蛋白(OVA))和佐剂(聚(I:C)),随后对其大小、zeta 电位、形态以及抗原和佐剂的负载和释放进行了表征。使用内部开发的空心微针敷贴器将纳米颗粒混悬液精确注射到约 120μm 深的小鼠皮肤中。OVA/聚(I:C)负载的纳米颗粒和 OVA/聚(I:C)溶液引发了类似强的总 IgG 和 IgG1 反应。然而,OVA 和聚(I:C)共包封在纳米颗粒中显著增加了 IgG2a 反应,与抗原和佐剂的持续释放和纳米颗粒的较小尺寸相关。当检查细胞反应时,OVA/聚(I:C)负载的脂质体诱导了最强的 CD8 和 CD4 T 细胞反应。总之,该施药器控制的空心微针给药是皮内注射纳米颗粒疫苗的极好方法,可用于选择针对体液和细胞免疫反应的最佳纳米颗粒制剂。
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