Abstract:
:Current HIV vaccines are only partially efficacious, presenting an opportunity to identify correlates of protection and, thereby, potential insight into mechanisms that prevent HIV acquisition. Two independent preclinical challenge studies in nonhuman primates (NHPs) previously showed partial efficacy of a mosaic adenovirus 26 (Ad26)-based HIV-1 vaccine candidate. To investigate the basis of this protection, we performed whole transcriptomics profiling by RNA sequencing (RNA-seq) in sorted lymphocytes from peripheral blood samples taken during these studies at different time points after vaccination but before challenge. We observed a transcriptional signature in B cells that associated with protection from acquisition of simian immunodeficiency virus (SIV) or the simian-human immunodeficiency virus (SHIV) in both studies. Strong antibody responses were elicited, and genes from the signature for which expression was enriched specifically associated with higher magnitude of functional antibody responses. The same gene expression signature also associated with protection in RV144 in the only human HIV vaccine trial to date that has shown efficacy and in two additional NHP studies that evaluated similar canarypox-based vaccine regimens. A composite gene expression score derived from the gene signature was one of the top-ranked correlates of protection in the NHP vaccine studies. This study aims to bridge preclinical and clinical data with the identification of a gene signature in B cells that is associated with protection from SIV and HIV infection by providing a new approach for evaluating future vaccine candidates.
journal_name
Sci Transl Medjournal_title
Science translational medicineauthors
Ehrenberg PK,Shangguan S,Issac B,Alter G,Geretz A,Izumi T,Bryant C,Eller MA,Wegmann F,Apps R,Creegan M,Bolton DL,Sekaly RP,Robb ML,Gramzinski RA,Pau MG,Schuitemaker H,Barouch DH,Michael NL,Thomas Rdoi
10.1126/scitranslmed.aaw4236subject
Has Abstractpub_date
2019-08-28 00:00:00issue
507eissn
1946-6234issn
1946-6242pii
11/507/eaaw4236journal_volume
11pub_type
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