Abstract:
:An effective vaccine that can protect against HIV infection does not exist. A major reason why a vaccine is not available is the high mutability of the virus, which enables it to evolve mutations that can evade human immune responses. This challenge is exacerbated by the ability of the virus to evolve compensatory mutations that can partially restore the fitness cost of immune-evading mutations. Based on the fitness landscapes of HIV proteins that account for the effects of coupled mutations, we designed a single long peptide immunogen comprising parts of the HIV proteome wherein mutations are likely to be deleterious regardless of the sequence of the rest of the viral protein. This immunogen was then stably expressed in adenovirus vectors that are currently in clinical development. Macaques immunized with these vaccine constructs exhibited T-cell responses that were comparable in magnitude to animals immunized with adenovirus vectors with whole HIV protein inserts. Moreover, the T-cell responses in immunized macaques strongly targeted regions contained in our immunogen. These results suggest that further studies aimed toward using our vaccine construct for HIV prophylaxis and cure are warranted.
journal_name
Proc Natl Acad Sci U S Aauthors
Murakowski DK,Barton JP,Peter L,Chandrashekar A,Bondzie E,Gao A,Barouch DH,Chakraborty AKdoi
10.1073/pnas.2022496118subject
Has Abstractpub_date
2021-02-02 00:00:00issue
5eissn
0027-8424issn
1091-6490pii
2022496118journal_volume
118pub_type
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