Abstract:
:Transmission of human immunodeficiency virus type 1 (HIV-1) occurs primarily via the mucosal route, suggesting that HIV-1 vaccines may need to elicit mucosal immune responses. Here, we investigated the immunogenicity and relative efficacy of systemic immunization with two human ALVAC-HIV-1 recombinant vaccines expressing Gag, Pol, and gp120 (vCP250) or Gag, Pol, and gp160 (vCP1420) in a prime-boost protocol with their homologous vaccine native Env proteins. The relative efficacy was measured against a high-dose mucosal exposure to the pathogenic neutralization-resistant variant SHIV(KU2) (simian-human immunodeficiency virus). Systemic immunization with both vaccine regimens decreased viral load levels not only in blood but unexpectedly also in mucosal sites and protected macaques from peripheral CD4+ T-cell loss. This protective effect was stronger when the gp120 antigen was included in the vaccine. Inclusion of recombinant Tat protein in the boosting phase along with the Env protein did not contribute further to the preservation of CD4+ T cells. Thus, systemic immunization with ALVAC-HIV-1 vaccine candidates elicits anti-HIV-1 immune responses able to contain virus replication also at mucosal sites in macaques.
journal_name
J Viroljournal_title
Journal of virologyauthors
Pal R,Venzon D,Santra S,Kalyanaraman VS,Montefiori DC,Hocker L,Hudacik L,Rose N,Nacsa J,Edghill-Smith Y,Moniuszko M,Hel Z,Belyakov IM,Berzofsky JA,Parks RW,Markham PD,Letvin NL,Tartaglia J,Franchini Gdoi
10.1128/JVI.80.8.3732-3742.2006subject
Has Abstractpub_date
2006-04-01 00:00:00pages
3732-42issue
8eissn
0022-538Xissn
1098-5514pii
80/8/3732journal_volume
80pub_type
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