Design and evaluation of optimized artificial HIV-1 poly-T cell-epitope immunogens

PloS One
Alena ReguzovaS I Bazhan

Abstract

A successful HIV vaccine in addition to induction of antibody responses should elicit effective T cell responses. Here we described possible strategies for rational design of T-cell vaccine capable to induce high levels of both CD4+ and CD8+ T- cell responses. We developed artificial HIV-1 polyepitope T-cell immunogens based on the conserved natural CD8+ and CD4+ T cell epitopes from different HIV-1 strains and restricted by the most frequent major human leukocyte antigen (HLA) alleles. Designed immunogens contain optimized core polyepitope sequence and additional "signal" sequences which increase epitope processing and presentation to CD8+ and CD4+ T-lymphocytes: N-terminal ubiquitin, N-terminal signal peptide and C-terminal tyrosine motif of LAMP-1 protein. As a result we engineered three T cell immunogens - TCI-N, TCI-N2, and TCI-N3, with different combinations of signal sequences. All designed immunogens were able to elicit HIV-specific CD4+ and CD8+ T cell responses following immunization. Attachment of either ubiquitin or ER-signal/LAMP-1 sequences increased both CD4+ and CD8+ mediated HIV-specific T cell responses in comparison with polyepitope immunogen without any additional signal sequences. Moreover, TCI-N3 polyepito...Continue Reading

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Citations

Sep 8, 2017·Expert Review of Vaccines·Mathieu SurenaudJean-Daniel Lelièvre
Feb 27, 2020·Viruses·Elena BuschChristine E Engeland
Nov 24, 2020·Journal of Biomolecular Structure & Dynamics·Sergei I BazhanLarisa I Karpenko
Oct 7, 2021·Human Vaccines & Immunotherapeutics·Maria da Conceição Viana InvençãoAntonio Carlos de Freitas

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Methods Mentioned

BETA
PCR
Reverse transcription-PCR
electrophoresis
transfection
Flow
flow cytometry

Software Mentioned

Vector NTI
R
DNASTAR
NCBI
BLAST
Cell Quest
TEpredict
PolyCTLDesigner

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