Synthesis and Optimization of Next-Generation Low-Molecular-Weight Pentablock Copolymer Nanoadjuvants.

Synthesis and Optimization of Next-Generation Low-Molecular-Weight Pentablock Copolymer Nanoadjuvants.
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DOI:
10.3390/vaccines11101572
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发表时间:
2023-10-09
期刊:
影响因子:
7.8
通讯作者:
Mallapragada SK
Mallapragada SK
中科院分区:
医学3区
文献类型:
--
作者:
Siddoway AC;White BM;Narasimhan B;Mallapragada SK

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聚合物纳米材料(例如基于 Pluronic® 的五嵌段共聚物)与传统疫苗佐剂相比具有重要优势,并且已得到越来越多的研究,以开发更有效的疫苗。之前对基于 Pluronic® F127 的五嵌段共聚物进行的研究,通过聚(二乙基氨基乙基甲基丙烯酸酯)(PDEAEM)块进行功能化,通过抗原呈递和 B 细胞受体交联证明了佐剂能力。在这项工作中,我们描述了基于低分子量 Pluronic® 的五嵌段共聚物纳米佐剂的合成和优化,该佐剂具有高生物相容性和低剂量下改进的佐剂性。我们合成了具有 PDEAEM 嵌段的低分子量 Pluronic® P123 基五嵌段共聚物,研究了聚合物浓度、胶束尺寸和 zeta 电位之间的关系,并测量了模型抗原卵清蛋白从这些纳米材料中的释放动力学。基于Pluronic® P123的五嵌段共聚物纳米佐剂比第一代基于Pluronic® F127的五嵌段共聚物纳米佐剂表现出更高的生物相容性。我们评估了含有卵清蛋白的基于 Pluronic® P123 的五嵌段共聚物纳米疫苗在小鼠体内的佐剂能力,结果表明,使用这些纳米疫苗免疫的动物能够引发高抗体滴度,即使与基于 Pluronic® F127 的五嵌段共聚物相比,使用剂量显着降低。总的来说,这些研究证明了基于低分子量 Pluronic® P123 的五嵌段共聚物纳米材料的合成、自组装、生物相容性和佐剂特性,并具有更有效的肾脏清除率、高生物相容性和低聚合物浓度下增强的佐剂性等额外优势。
Polymeric nanomaterials such as Pluronic®-based pentablock copolymers offer important advantages over traditional vaccine adjuvants and have been increasingly investigated in an effort to develop more efficacious vaccines. Previous work with Pluronic® F127-based pentablock copolymers, functionalized with poly(diethyl aminoethyl methacrylate) (PDEAEM) blocks, demonstrated adjuvant capabilities through the antigen presentation and crosslinking of B cell receptors. In this work, we describe the synthesis and optimization of a new family of low-molecular-weight Pluronic®-based pentablock copolymer nanoadjuvants with high biocompatibility and improved adjuvanticity at low doses. We synthesized low-molecular-weight Pluronic® P123-based pentablock copolymers with PDEAEM blocks and investigated the relationship between polymer concentration, micellar size, and zeta potential, and measured the release kinetics of a model antigen, ovalbumin, from these nanomaterials. The Pluronic® P123-based pentablock copolymer nanoadjuvants showed higher biocompatibility than the first-generation Pluronic® F127-based pentablock copolymer nanoadjuvants. We assessed the adjuvant capabilities of the ovalbumin-containing Pluronic® P123-based pentablock copolymer-based nanovaccines in mice, and showed that animals immunized with these nanovaccines elicited high antibody titers, even when used at significantly reduced doses compared to Pluronic® F127-based pentablock copolymers. Collectively, these studies demonstrate the synthesis, self-assembly, biocompatibility, and adjuvant properties of a new family of low-molecular-weight Pluronic® P123-based pentablock copolymer nanomaterials, with the added benefits of more efficient renal clearance, high biocompatibility, and enhanced adjuvanticity at low polymer concentrations.
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