Abstract：
:Vaccine adjuvants are essential for enhancing immune responses during vaccination. However, only a limited number of safe and effective adjuvants, especially mucosal adjuvants, are available for use in vaccines. The development of a practically applicable mucosal adjuvant is therefore urgently needed. Here, we showed that the non-toxic CTA1-DD adjuvant, which combined the full enzymatic activity of the A1 subunit of cholera toxin (CT) with two immunoglobulin-binding domains of Staphylococcus aureus protein A (SpA), promoted mucosal and systemic humoral and cell-mediated immune responses following intranasal administration with H1N1 split vaccine in mice. We demonstrated that CTA1-DD-adjuvant vaccine provided 100% protection against mortality and greatly reduced morbidity in a mouse model. We also showed that addition of CTA1-DD to the vaccine elicited significantly higher hemagglutination inhibition titers and IgG antibodies in sera than alum adjuvant. Furthermore, CTA1-DD significantly promoted the production of mucosal secretory IgA in lung lavages and vaginal lavages. We also showed that CTA1-DD could be used as a mucosal adjuvant to enhance T cell responses. Our results clearly indicated that CTA1-DD contributed to the elicitation of a protective cell-mediated immune response required for efficacious vaccination against influenza virus, which suggested that this adjuvant could be explored further as a clinically safe mucosal vaccine adjuvant for respiratory diseases and other mucosal diseases.
journal_name
Vaccinejournal_title
Vaccineauthors
Fan X,Su Q,Qiu F,Yi Y,Shen L,Jia Z,Liang P,Zou Y,Bi Sdoi
10.1016/j.vaccine.2018.05.075subject
Has Abstractpub_date
2018-07-05 00:00:00pages
4354-4361issue
29eissn
0264-410Xissn
1873-2518pii
S0264-410X(18)30739-4journal_volume
36pub_type
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