Abstract:
:Recombinant Adenovirus serotype 5 (Ad5) vectors have been used as vaccine platforms in numerous animal and human clinical studies. The immune response induced by Ad5 vaccines can be mitigated due to pre-existing Ad5 immunity. We previously reported the use of a novel Ad5 platform to induce cellular immune responses (CMI) against HIV-1 Gag in Ad5 hyper immune mice. Here, the effectiveness of the Ad5 [E1-, E2b-] vaccine platform was evaluated using a triad mixture of HIV-1 Gag, Pol, and Nef as antigenic transgenes. Broad CMI was induced following vaccination with the HIV-1 expressing vectors in Ad5 naïve and Ad5 immunized mice. A mixture of the three vaccines induced CMI against each transgene product even in the presence of hyper Ad5 immunity. These studies revealed that CMI responses to immunization with Ad5 [E1-, E2b-]-gag, Ad5 [E1-, E2b-]-pol or Ad5 [E1-, E2b-]-nef vectors were transgene specific and did not induce CMI responses against irrelevant antigens such as carcinoembryonic antigen (CEA), herpes simplex virus glycoprotein B (HSV), cytomegalovirus (CMV) or influenza virus antigens. We are evaluating this recombinant triad viral vector as an HIV-1 vaccine in a non-human primate model and the data indicate that the vaccine is worthy of clinical evaluation.
journal_name
Vaccinejournal_title
Vaccineauthors
Gabitzsch ES,Xu Y,Yoshida LH,Balint J,Amalfitano A,Jones FRdoi
10.1016/j.vaccine.2009.06.028subject
Has Abstractpub_date
2009-10-30 00:00:00pages
6394-8issue
46eissn
0264-410Xissn
1873-2518pii
S0264-410X(09)00862-7journal_volume
27pub_type
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