Yarong Zeng, Yifan Yin, Jialin Xu, Rong Su, Sibo Zhang, Feng Han, Yufang Li, Xueqing Zhu, Ciying Qian, Feihong Zou, Renfei Gao, Xiuli Zhang, Lizhi Zhou, Tingting Li, Min Lin, Qingbing Zheng, Hai Yu, Jun Zhang, Zizheng Zheng, Ying Gu, Ningshao Xia, Shaowei Li
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引用次数: 0
Abstract
Vaccine Adjuvant Delivery Systems (VADSs) that integrate both delivery and adjuvancy constitute a vital strategy in modern vaccine research. Herein, we employed microfluidics to blend nanosized aluminum hydroxide (XA) and a nanoemulsion (XE) in varying proportions. A 2:3 (v/v) mixture produced nanoparticles (XAE) of approximately 220 nm with near-neutral zeta potential, which significantly enhanced antigen uptake in DC2.4 cells and displayed stronger adjuvant activity than XA or XE alone. By electrostatically adsorbing the TLR9 agonist CpG onto XAE, we constructed XAEC as an integrated delivery platform that co-delivers antigens and immune-stimulatory molecules, thereby improving CpG's bioavailability and biocompatibility. This XAEC platform generated an "immune-activated microenvironment" at the injection site, fostering antigen-presenting cell (APC) recruitment, augmenting antigen presentation, facilitating vaccine trafficking to immune organs, and eliciting a Th1-biased immune response. XAEC substantially boosted immunogenicity in prophylactic Respiratory Syncytial Virus (RSV) and Varicella-Zoster Virus (VZV) vaccines and induced potent antitumor responses in a Human Papillomavirus (HPV) tumor model. Hence, XAEC emerges as a promising next-generation vaccine adjuvant system.
期刊介绍:
Journal of Nanobiotechnology is an open access peer-reviewed journal communicating scientific and technological advances in the fields of medicine and biology, with an emphasis in their interface with nanoscale sciences. The journal provides biomedical scientists and the international biotechnology business community with the latest developments in the growing field of Nanobiotechnology.