Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 10, Issue 50, Pages 43533-43542Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.8b18164
Keywords
bacterial vaccine; aluminum (oxy) hydroxide nanorods; whole-Pseudomonas aeruginosa; rapid stimulation; immune responses
Funding
- College of Bioengineering, 111 Project Laboratory of Biomechanics and Tissue Repair Engineering, Key Laboratory of Biorheological Science and Technology, Chongqing University
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Bacterial vaccines have been widely used to prevent infectious diseases, especially in veterinary medicine. Although there are many reports on bacterin adjuvants, only a few contain innovations in bacterin adjuvants. Taking this into consideration, in this study we designed and synthesized a new aluminum (oxy) hydroxide (AIOOH) nanorod (Al-NR) with a diameter of 200 +/- 80 nm and a length of 1.1 +/- 0.6 mu m. Using whole-Pseudomonas aeruginosa PAO1 as antigens, we showed that the bacterial antigens of P. aeruginosa PAO1 adsorbed on the Al-NRs induced a quick and stronger antigen-specific antibody response than those of the other control groups, especially in the early stage of immunization. Furthermore, the level of antigen-specific IgG was approximately 4-fold higher than that of the no adjuvant group and 2.5-fold higher than those of other adjuvant groups in the first week after the initial immunization. The potent adjuvant activity of the Al-NRs was attributed to the rapid presentation of antigen adsorbed on them by APCs. Additionally, Al-NRs induced a milder local inflammation than the other adjuvants. In short, we confirmed that Al-NRs, enhancing both humoral and cellular immune responses, are a potentially promising vaccine adjuvant delivery system for inhibiting the whole-Pseudomonas aeruginosa infection.
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