Selective induction of host genes by MVA-B, a candidate vaccine against HIV/AIDS.
The aim of this study was to define the effects on antigen-presenting cells of the expression of HIV antigens from an attenuated poxvirus vector. We have analyzed the transcriptional changes in gene expression following infection of human immature monocyte-derived dendritic cells (DC) with recombinant modified vaccinia virus Ankara (MVA) expressing the genes encoding the gp120 and Gag-Pol-Nef antigens of HIV type 1 clade B (referred to as MVA-B) versus parental MVA infection. Using microarray technology and real-time reverse transcription-PCR, we demonstrated that the HIV proteins induced the expression of cytokines, cytokine receptors, chemokines, chemokine receptors, and molecules involved in antigen uptake and processing, including major histocompatibility complex (MHC) genes. Levels of mRNAs for interleukin-1, beta interferon, CCR8, and SCYA20 were higher after HIV antigen production. MVA-B infection also modulated the expression of antigen processing and presentation genes: the gene for MICA was upregulated, whereas those for HLA-DRA and HSPA5 were downregulated. Indeed, the increased expression of the gene for MICA, a glycoprotein related to major histocompatibility complex class I molecules, was shown to enhance the interaction between MVA-B-infected target cells and cytotoxic lymphocytes. The expression profiles of the genes for protein kinases such as JAK1 and IRAK2 were activated after HIV antigen expression. Several genes included in the JAK-STAT and mitogen-activated protein kinase signaling pathways were regulated after HIV antigen expression. Our findings provide the first gene signatures in DC of a candidate MVA-B vaccine expressing four HIV antigens and identified the biological roles of some of the regulatory genes, like that for MICA, which will help in the design of more effective MVA-derived vaccines.
Department of Molecular and Cellular Biology, Centro Nacional de Biotecnología CSIC, Campus Universidad Autónoma, E-28049 Madrid, Spain. sguerra@cnb.csic.es
Susana
S
Guerra
José Manuel
JM
González
Núria
N
Climent
Hugh
H
Reyburn
Luis A
LA
López-Fernández
José L
JL
Nájera
Carmen E
CE
Gómez
Felipe
F
García
José M
JM
Gatell
Teresa
T
Gallart
Mariano
M
Esteban
D016915:AIDS Vaccines / Q000235:genetics / Q000276:immunology*; D017951:Antigen Presentation; D002478:Cells, Cultured; D016207:Cytokines / Q000096:biosynthesis; D003713:Dendritic Cells / Q000276:immunology*; D000091342:Endoplasmic Reticulum Chaperone BiP; D020869:Gene Expression Profiling; D005822:Genetic Vectors; D015699:HIV Envelope Protein gp120 / Q000235:genetics / Q000276:immunology; D006801:Humans; D015398:Signal Transduction / Q000235:genetics; D014616:Vaccinia virus / Q000235:genetics; D054301:gag Gene Products, Human Immunodeficiency Virus / Q000235:genetics / Q000276:immunology; D054311:nef Gene Products, Human Immunodeficiency Virus / Q000235:genetics / Q000276:immunology; D054302:pol Gene Products, Human Immunodeficiency Virus / Q000235:genetics / Q000276:immunology
D016915:AIDS Vaccines; D016207:Cytokines; D000091342:Endoplasmic Reticulum Chaperone BiP; D015699:HIV Envelope Protein gp120; C000717247:HSPA5 protein, human; D054301:gag Gene Products, Human Immunodeficiency Virus; D054311:nef Gene Products, Human Immunodeficiency Virus; C514837:nef protein, Human immunodeficiency virus 1; D054302:pol Gene Products, Human Immunodeficiency Virus