Suppressor of cytokine signaling 1 inhibition strategy to enhance anti-HIV vaccination.
Extensive efforts aimed at stimulating immune responses by modifying HIV antigens and using various delivery systems and adjuvants have so far failed to generate promising HIV vaccines, highlighting the urgent need to explore alternative immunization approaches. Antigen-presenting cells, such as dendritic cells, play a critical role in the initiation and maintenance of immune responses against HIV infection and dendritic cells are regulated by stimulatory, as well as inhibitory signaling. Recent studies demonstrate that the suppressor of cytokine signaling 1 (SOCS1) functions as an antigen-presentation attenuator by restricting the Janus-activated kinase-signal transducers and activators of transcription and Toll-like receptor-signaling pathways. SOCS1-silenced dendritic cells produce higher levels of both T-helper 1- and 2-polarizing cytokines, broadly enhance memory HIV-specific B-cell and T-cell responses and activate natural killer cells owing to unbridled cytokine feedback signaling loops. Therefore, the inhibition of antigen-presentation attenuators represents a generally applicable and alternative strategy for enhancing the potency of various forms of prophylactic and therapeutic HIV vaccines.
Song
Xiao-Tong
XT
Baylor College of Medicine, Center for Cell and Gene Therapy, Department of Molecular and Human Genetics, Houston, TX 77030, USA. xsong1@bcm.tmc.edu
Aldrich
Melissa
M
Chen
Si-Yi
SY
D016915:AIDS Vaccines; D003713:Dendritic Cells / Q000276:immunology; D015483:HIV Antibodies / Q000276:immunology; D015658:HIV Infections / Q000276:immunology*; D006801:Humans; D000071222:Suppressor of Cytokine Signaling 1 Protein; D050826:Suppressor of Cytokine Signaling Proteins / Q000037:antagonists & inhibitors*; D018417:Th1 Cells / Q000276:immunology; D018418:Th2 Cells / Q000276:immunology
D016915:AIDS Vaccines; D015483:HIV Antibodies; C108944:SOCS1 protein, human; D000071222:Suppressor of Cytokine Signaling 1 Protein; D050826:Suppressor of Cytokine Signaling Proteins